Description:FIELD OF THE INVENTION
[0001] The present disclosure relates generally to water purification compositions. Specifically, the present disclosure provides an effervescent composition for purification of contaminated water comprising Citrullus lanatus seeds.

BACKGROUND OF THE INVENTION
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Water is an important and limited resource essential for everyday life. Not all available sources of water are suitable for all our needs. Most commonly available sources are often contaminated with pathogens, industrial wastes, and other suspended solids that are undesirable and may cause harm to individuals. These contaminants need to be eliminated for appropriate usage of water.
[0004] Conventionally water filters have been used for purification. But these devices are associated with costs limiting its usability amongst the economically weaker sections of the society. Chlorine treatment using chemicals such as chlorine/iodine/chlorine dioxide has been practiced widely for their cheaper rates. But chlorine is ineffective is removing turbidity, or undesirable color from water. Effervescent tablets have been used to overcome this drawback. But effervescent tablets known in the art do not effectively clean water, comprise expensive components or comprise strong chemicals that upon regular consumption may lead to bioaccumulation in the body.
[0005] Thus, there is a need in the art for alternate effervescent compositions for water purification that are economic, effectively decontaminate water and are based on natural components.

OBJECTS OF THE INVENTION
[0006] An object of the present disclosure is to provide a composition for purification of contaminated water.
[0007] An object of the present disclosure is to provide an effervescent composition for purification of contaminated water comprising Citrullus lanatus seeds.
[0008] Another object of the present disclosure is to provide a composition that maintains neutral pH, reduces turbidity, alkalinity, color and hardness of contaminated water.
[0009] Yet another object of the present disclosure is to provide a composition that is environmentally friendly and economical.

SUMMARY OF THE INVENTION
[0010] This summary is provided to introduce a selection of concepts in a simplified form that are further described below in Detailed Description section. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
[0011] Aspects of the present disclosure provide a water purification composition that is effervescent and leads to effective coagulation of contaminants in water. The disclosure provides effervescent compositions made from Citrullus lanatus seeds which are readily available and is an active coagulant in water.
[0012] In an aspect, the present disclosure provides an effervescent composition for purification of contaminated water comprising Citrullus lanatus seeds, citric acid, tartaric acid, a bicarbonate salt, and maltitol.
[0013] In an embodiment, the composition comprises Citrullus lanatus seeds as dried Citrullus lanatus seeds powder.
[0014] In an embodiment, the composition comprises Citrullus lanatus seeds in a weight percentage range of about 37.9% to about 38.4% of the composition. In an embodiment, the composition comprises citric acid in a weight percentage range of about 12.6% to about 12.8% of the composition. In an embodiment, the composition comprises tartaric acid in a weight percentage range of about 1.28% to about 1.5% of the composition. In an embodiment, the composition comprises a bicarbonate salt in a weight percentage range of about 28% to about 28.2% of the composition. In an embodiment, the composition comprises maltitol in a weight percentage range of about 15% to about 15.8% of the composition.
[0015] In an embodiment, the composition further comprises an excipient. The excipient may be selected from fragrance, preservative, flavoring agent, lubricant, sweetening agent, or combinations thereof.
[0016] In an aspect, the present disclosure provides an effervescent formulation for purification of contaminated water comprising Citrullus lanatus seeds, citric acid, tartaric acid, sodium bicarbonate, maltitol, and an excipient. The excipient may be selected from fragrance, preservative, flavoring agent, lubricant, sweetening agent, or combinations thereof.
[0017] In an embodiment, the effervescent formulation is an effervescent tablet formulation.
[0018] In another aspect, the present disclosure provides a method of production of the effervescent tablet formulation comprising the steps of: (a) drying, powdering and optionally sieving the Citrullus lanatus seeds; (b) weighing and mixing the citric acid, tartaric acid, sodium bicarbonate, maltitol, and the excipients with the seeds to obtain a homogenous powder; and (c) compressing the powder to give the effervescent tablet formulation.
[0019] Other aspects of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learnt by the practice of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The following drawings form part of the present specification and are included to further illustrate aspects of the present disclosure. The disclosure may be better understood by reference to the drawings in combination with the detailed description of the specific embodiments presented herein.
[0021] Figure 1 provides a graphical representation of the variation of pH of water with dose of Citrullus lanatus seed powder in a formulation, as per an embodiment of the present disclosure, used for 1L of contaminated water.
[0022] Figure 2 provides a graphical representation of the variation of turbidity (in Nephelometric Turbidity Units (NTU)) of water with dose of Citrullus lanatus seed powder in a formulation, as per an embodiment of the present disclosure, used for 1L of contaminated water.
[0023] Figure 3 provides a graphical representation of the variation of alkalinity (mg/L) of water with dose of Citrullus lanatus seed powder in a formulation, as per an embodiment of the present disclosure, used for 1L of contaminated water.
[0024] Figure 4 provides a graphical representation of the variation of hardness (mg/L) of water with dose of Citrullus lanatus seed powder in a formulation, as per an embodiment of the present disclosure, used for 1L of contaminated water.

DETAILED DESCRIPTION OF THE INVENTION
[0025] The following is a detailed description of embodiments of the disclosure. The embodiments are in such detail as to clearly communicate the disclosure. However, the amount of detail offered is not intended to limit the anticipated variations of embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present disclosure as defined by the appended claims.
[0026] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
[0027] Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0028] In some embodiments, numbers have been used for quantifying weights, percentages, ratios, and so forth, to describe and claim certain embodiments of the invention and are to be understood as being modified in some instances by the term “about.” Accordingly, in some embodiments, the numerical parameters set forth in the written description and attached claims are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable. The numerical values presented in some embodiments of the invention may contain certain errors necessarily resulting from the standard deviation found in their respective testing measurements.
[0029] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0030] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0031] Unless the context requires otherwise, throughout the specification which follow, the word “comprise” and variations thereof, such as, “comprises” and “comprising” are to be construed in an open, inclusive sense that is as “including, but not limited to.”
[0032] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein.
[0033] All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0034] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified.
[0035] The description that follows, and the embodiments described therein, is provided by way of illustration of an example, or examples, of particular embodiments of the principles and aspects of the present disclosure. These examples are provided for the purposes of explanation, and not of limitation, of those principles and of the disclosure.
[0036] It should also be appreciated that the present disclosure can be implemented in numerous ways, including as a system, a method or a device. In this specification, these implementations, or any other form that the invention may take, may be referred to as processes. In general, the order of the steps of the disclosed processes may be altered within the scope of the invention.
[0037] The headings and abstract of the invention provided herein are for convenience only and do not interpret the scope or meaning of the embodiments.
[0038] The following discussion provides many example embodiments of the inventive subject matter. Although each embodiment represents a single combination of inventive elements, the inventive subject matter is considered to include all possible combinations of the disclosed elements. Thus if one embodiment comprises elements A, B, and C, and a second embodiment comprises elements B and D, then the inventive subject matter is also considered to include other remaining combinations of A, B, C, or D, even if not explicitly disclosed.
[0039] The term ‘contaminated water’ as used herein may refer to water comprising undesired organic solids, inorganic solids, organic liquid, or inorganic liquids such as but not limited to calcium, magnesium, lead, or copper. The term also includes water comprising pathogens.
[0040] The terms ‘contaminated water’ and ‘raw water’ have been used interchangeably in the present disclosure.
[0041] Aspects of the present disclosure provide water purification compositions. Specifically the compositions of the present disclosure are effervescent comprising a natural and readily available active coagulant in water - Citrullus lanatus or Watermelon seeds for purifying raw water.
[0042] In an embodiment, the present disclosure provides an effervescent composition for purification of contaminated water comprising Citrullus lanatus seeds, citric acid, tartaric acid, a bicarbonate salt, and maltitol.
[0043] In an embodiment, the composition comprises Citrullus lanatus seeds as dried Citrullus lanatus seeds powder. Specifically, the Citrullus lanatus seeds may be mature, dried Citrullus lanatus seeds powder.
[0044] Without being bound to theory, it is believed that the effectiveness of any composition is dependent on the effective delivery of the active component. Citrullus lanatus seeds powder has natural coagulating properties while maltitol acts as a natural binder for the composition. The composition put together ensures maximum effervescence that improves delivery of the seed powder in contaminated water for its most effective treatment. Thus, the composition exhibits synergism.
[0045] In an embodiment, the composition comprises Citrullus lanatus seeds in a weight percentage range of about 37.9% to about 38.4% of the composition. In an embodiment, the composition comprises citric acid in a weight percentage range of about 12.6% to about 12.8% of the composition. In an embodiment, the composition comprises tartaric acid in a weight percentage range of about 1.28% to about 1.5% of the composition. In an embodiment, the composition comprises bicarbonate salt in a weight percentage range of about 28% to about 28.2% of the composition. In an embodiment, the composition comprises maltitol in a weight percentage range of about 15% to about 15.8% of the composition.
[0046] In an embodiment, citric acid includes citric acid salts, hydrates or derivatives thereof. In an embodiment, tartaric acid includes tartaric acid salts, hydrates or derivatives thereof. In an embodiment, the bicarbonate salt may be potassium bicarbonate, sodium bicarbonate, lithium bicarbonate, magnesium bicarbonate, calcium bicarbonate, or combinations thereof. Preferably, the bicarbonate salt may be sodium bicarbonate.
[0047] In an embodiment, the composition further comprises an excipient. The excipient may be selected from fragrance, preservative, flavoring agent, lubricant, sweetening agent, or combinations thereof.
[0048] In an embodiment, the composition is a coagulant and removes bacterial toxins. In an embodiment, the composition has adsorption properties that removes turbidity from water and reduces any undesired coloring. In an embodiment, the composition reduces hardness and maintains neutral pH of water. In an embodiment, the composition is natural, environmentally safe, and economical. In an embodiment, the composition is a rich source of proteins.
[0049] In an embodiment, the composition may have an effervescence time of less than 2 minutes. Increased effervescence results in increased dissolution of the composition in water which means faster release of components and quicker initiation of water purification process.
[0050] In an embodiment, the composition when added to water produces pleasant tasting solution.
[0051] In some embodiments, the composition may reduce turbidity of water to less than 5 Nephelometric Turbidity Units (NTUs). In an embodiment, the composition adjusts the pH of water to a range of 6.5 to 8.5. In an embodiment, the composition reduces hardness of water. In an embodiment, the composition reduces alkalinity of water.
[0052] In an embodiment, the present disclosure provides an effervescent formulation for purification of contaminated water comprising Citrullus lanatus seeds, citric acid, tartaric acid, sodium bicarbonate, maltitol, and an excipient. The excipient may be selected from fragrance, preservative, flavoring agent, lubricant, sweetening agent, or combinations thereof.
[0053] In an embodiment, the fragrance may be selected from mint, menthol, rose, sandalwood, lemongrass, lavender, or combinations thereof. In an embodiment, the preservative may be selected from magnesium carbonate, sodium benzoate, or combinations thereof. In an embodiment, the flavoring agent may be selected from strawberry, lemon, mint, citrus, menthol, vanilla, or combinations thereof. In an embodiment, the lubricant may be selected from talc, polyethylene glycol, magnesium stearate, or combinations thereof. In an embodiment, the sweetening agent may be selected from sucrose, fructose, glucose, aspartame, or combinations thereof.
[0054] In an embodiment, the formulation may be a solid, liquid or semi-solid. In an embodiment, the formulation may be selected from a tablet, capsule, powder, suspension, aerosol, gel, or solution.
[0055] In a preferred embodiment, the formulation is an effervescent tablet formulation.
[0056] In an embodiment, the formulation is required in lower quantities per liter of contaminated water being treated. In an embodiment, the composition may comprise about 0.5 gm to about 1.5 gms of Citrullus lanatus seed powder per liter of contaminated water being treated.
[0057] In an embodiment, the tablets are easy to use, have storage stability and are readily transportable.
[0058] In another embodiment, the present disclosure provides a method of production of the effervescent tablet formulation comprising the steps of: (a) drying, powdering and optionally sieving the Citrullus lanatus seeds; (b) weighing and mixing the citric acid, tartaric acid, sodium bicarbonate, maltitol, and the excipients with the seeds to obtain a homogenous powder; and (c) compressing the powder to give the effervescent tablet formulation.
[0059] In an embodiment, the Citrullus lanatus seeds may be dried at room temperature for a period of 5 to 10 days.
[0060] In an embodiment, the powder may be compressed by direct compression.
[0061] In an embodiment, the present disclosure provides a method of treating contaminated water, wherein the method comprises the steps of: a) exposing the contaminated water to the effervescent composition as recited above, and (b) stirring to activate the composition and give treated water.
EXAMPLES
[0062] The disclosure will now be illustrated with working examples, which are intended to illustrate the working of the disclosure and not intended to take restrictively to imply any limitations on the scope of the present disclosure. Although methods and materials similar or equivalent to those described herein can be used in the practice of the disclosed methods and compositions, the exemplary methods, devices and materials are described herein. It is to be understood that this disclosure is not limited to particular methods, and experimental conditions described, as such methods and conditions may vary.
[0063] MATERIALS: The raw water sample was collected by immersing a sterilized plastic container until it was full from Sukhna lake and Ghaggar river, flowing through Panchkula, Haryana, India. Fresh seeds of Citrullus lanatus used in this study were collected from the market and nearby locations in Haryana, India.
Example 1: Preparation of Citrullus lanatus seed powder
[0064] The Citrullus lanatus seeds were dried at ambient temperature 23-25ºC for a period of 5 days before crushing. The seeds were crushed into a fine powder and were sieved through 1.18mm standard sieve size. The powder was collected in sterile bottle with air tight cap.
Example 2: Preparation of formulation
[0065] The effervescent tablet formulations were prepared by direct compression as per composition in Table No. 1. The fine powder of seeds of Example 1 was prepared to slug. Then, the slugs were crushed and passed through Sieve No. 20. Other components were weighed and mixed with seeds to obtain a homogeneous powder. These powders were then compressed into corresponding tablets formulations.
Table No. 1: Components for effervescent formulation
S. No. Component Formulation C1 (gms) Formulation C2 (gms) Formulation C3 (gms)
1 Citrullus lanatus seed powder 0.5 1.0 1.5
2 Citric acid 0.166 0.33 0.5
3 Tartaric acid 0.02 0.033 0.05
4 Sodium bicarbonate 0.37 0.74 1.1
5 Maltitol 0.20 0.41 0.62
6 Aspartame 0.016 0.033 0.05
7 PEG600 0.016 0.033 0.05
8 Strawberry flavor 0.03 0.06 0.1

[0066] Evaluation of pre-compressional parameters for the formulations of Table No. 1 was performed as detailed below and the results are presented in Table No. 2.
[0067] i) Particle size: Sieve method was used for this test. Sieves of different meshes (20, 25, 30, 35, 40, 70 and 100) were selected and placed on top of each other. 100 g of formulation powder was placed on the upper sieve. After 10 min of mild shaking the amount remaining on each sieve was collected. Average diameter of powder was calculated by the following equation:

xi = Average size of both the upper and lower sieve

[0068] ii) Bulk density: A quantity of accurately weighed powder from each formulation was introduced in to a measuring cylinder and then the volume was noted. Bulk density was expressed in g/ml and determined by the following formula:

[0069] iii) Tapped density: A quantity of accurately weighed powder from each formulation was introduced into a measuring cylinder. The cylinder was hit from the height of 2.5 cm every 2 s, up to volume plateau. Tapped density was calculated from the following formula:

[0070] iv) Compressibility index and Hausner’s ratio: These parameters provide flow properties of the formulation powders. Compressibility index was expressed in percentage. The parameters are calculated by the following equations:

[0071] v) Angle of repose: It was measured by fixed funnel method. A funnel was secured with its tip at a given height H, above graph paper that was placed on a flat horizontal surface. Powder was carefully poured through the funnel until the apex of the conical pile just touches the tip of the funnel. The angle of repose (a) was then calculated by measuring the height (h) and radius (r) of the heap of the formed powder and putting the values in the equation:
tan (a) =
where, a = Angle of repose
Table No. 2: Pre-compressional parameters
S. No. Parameter Formulation C1 Formulation C2 Formulation C3
1 Particle size mean diameter (µ) 310.3 326.4 340.63
2 Bulk Density(g/mL) 0.73 0.88 0.65
3 Tapped Density (g/mL) 0.89 0.71 0.78
4 Compressibility index (%) 9.45 10.3 12.22
5 Hausner's ratio 1.25 1.238 1.34
6 Angle of repose 27.45 30 26.8

[0072] The post-compressional parameters of the tablet formulations of Table No. 1 were evaluated as detailed below and the results are presented in Table No. 3.
[0073] 1) Weight variation: Twenty tablets were weighed individually and the average weight was calculated. The individual weights were then compared with the average weight. The tablets passed the test if not more than two tablets fall outside the percentage limit and none of tablet differs by more than double percentage limit.
[0074] 2) Friability: A total of 20 tablets were weighed and placed in a friabilator (Erweka, TAP, Germany) and then operated at 25 rpm for 4 min. The tablets were then weighed again. The difference in the two weights was used to calculate friability as follows:
Friability % = ×100
[0075] 3) pH: One tablet was dissolved in purified water. After complete dissolution, the solution pH was measured by a pH meter. This test was repeated 3 times for each formulation.
[0076] 4) Carbon dioxide content: One effervescent tablet was dissolved in 100 ml sulfuric acid 1 N and weight variation was measured before and after dissolution. CO2 content was presented as mg. This experiment was conducted on three tablets for each formulation.
[0077] 5) Hardness: The tablet hardness was determined by hardness tester.
[0078] 6) Effervescence time: A tablet was placed in a glass containing purified water and effervescence time was measured by a stopwatch.
[0079] 7) Thickness: Thickness was measured by using a calibrated dial caliper. 10 tablets of each formulation were evaluated.
[0080] 8) Assay: A tablet was placed in a 100 ml volumetric flask and dissolved in phosphate buffer pH 5. After dilution, the amount of the drug was determined by UV spectrophotometer at 229.8 nm against blank. 10 tablets of each formulation were evaluated.
[0081] 9) Content uniformity: After selecting 10 tablets randomly, the content of each tablet was separately determined.
Table No. 3: Post- compressional parameters of Tablet formulations
S. No. Parameter Formulation C1 Formulation C2 Formulation C3
1 Weight variation (%) 2.32 0.12
4.42
4.34 0.04

2 Friability (%) 0.989 0.01
0.934 0.02
0.973 0.05

3 pH solution 5.7 0.03
5.9 0.02
5.8 0.04

4 Carbon dioxide content 301 15
314 13
420 16

5 Hardness (N) 72.55 2.23
78.32 2.77
68.33

6 Effervescence time(s) 128
133
130

7 Thickness(mm) 5.48
5.73
5.50

8 Assay results (mg) 2500
2530
2783

9 Content Uniformity(%) 3.22 3.67 2.53

Example 3: Water purification test
[0082] The effervescent tablet formulations of Table No. 1 made by taking 0.5gm, 1.0 gm, and 1.5 gm of the Citrullus lanatus seed powder were put into 1000 mL of the collected river water. The solution was shaken properly for about 1 minute for activation and extraction of coagulant and anti-microbial proteins from the tablets and was kept for magnetic stirring for 0.5 hour, 1 hour, and 2 hours respectively. The treated water was then allowed to stand undisturbed for 6 hours. Later, top layer of 100 ml was collected and subjected to post treatment analysis.
[0083] Physiochemical parameters of the water were determined prior and after treatment with the three formulations. The parameters determined were pH, Turbidity, Alkalinity, Hardness and effervescence time of the tablets.
[0084] a) pH: pH of the samples decreased from 8.5 to 7.1, 7.0, and 6.8 for tablet formulations comprising 0.5 gm, 1.0 gm, and 1.5 gm of seed powder respectively [refer Table No. 4, Figure 1]. After treatment the range of pH was within the limits permitted.
[0085] b) Turbidity: The initial turbidity for the raw water sample taken was 42 NTU which was beyond the limits set by Bureaus of Indian Standards/Government of India/World Health Organization (BIS/GOI/WHO). It was noted that after treatment with the tablet formulations comprising 0.5 gm, 1 gm and 1.5 gms of seed powder the turbidity got reduced from 42 NTU to 5.1, 3.8, and 2.1 NTU respectively [refer Table No. 4, Figure 2]. The turbidity reduced below 5 NTU. Due to this treatment there was an improvement in the floc size and floc settled rapidly. This analysis shows that with increase in dose of seed powder in the formulation, the turbidity got reduced to a good extent.
[0086] c) Alkalinity: Alkalinity of the raw water was noted to be 310 mg/L for raw water but after treatment with the tablet formulations comprising 0.5gm, 1gm and 1.5gms of the seed powder the turbidity got reduced to 145, 159, 105 mg/L respectively [refer Table No. 4, Figure 3]. The alkalinity present was within the range of permitted standards by BIS/WHO/GOI. It was observed that the formulation had a natural buffering capacity. The flocs were light however it confined the reduction of alkalinity.
[0087] d) Hardness: Hardness in raw water is due to presence of calcium, magnesium and other hardness causing substances. Hardness was 232 mg/L for raw water after treatment with the formulation comprising 0.5 gm, 1 gm and 1.5gms of seed powder, the hardness got reduced to 135, 113, and 107 mg/L respectively. It was observed that hardness of water decreased with increase in dose of seed powder in the formulation.
[0088] e) Effervescence time: The effervescence time for all the tablet formulations was less than 2 min. that is within the range of Indian pharmacopeial standard.
[0089] f) Color: The initial brown color of raw water sample got completely removed after treatment with the tablet formulations, confirming that the formulation shows absorbent properties.
Table No. 4: Parameters studied before and after treatment of contaminated water with the effervescent tablet formulations
Sr.No. Parameters Before Treatment After Treatment with Tablet formulations BIS Standard
0.5 gm 1 gm 1.5 gm
1. pH 8.9 7.1 7.0 6.8 6.5-8.5
2. Turbidity(NTU) 42 5.1 3.8 2.1 Max. 5
3 Alkalinity(mg/lit) 310 145 159 105 200-600
4. Hardness(mg/lit) 232 135 113 107 500
5. Color Brown Colorless Colorless

[0090] While the foregoing describes various embodiments of the disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof. The scope of the invention is determined by the claims that follow. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.

ADVANTAGES OF THE PRESENT INVENTION
[0091] The present disclosure provides an effervescent composition for purification of contaminated water that effectively maintains neutral pH, reduces turbidity, alkalinity and hardness of contaminated water.
[0092] The present disclosure provides an effervescent composition that is environmentally friendly and economical.
[0093] The present disclosure provides an effervescent composition for purification of contaminated water that comprises natural components and does not leave any foul odor or taste in water.

We Claims:

1. An effervescent composition for purification of contaminated water comprising Citrullus lanatus seeds, citric acid, tartaric acid, a bicarbonate salt, and maltitol.
2. The composition as claimed in claim 1, wherein the composition comprises Citrullus lanatus seeds as dried Citrullus lanatus seeds powder.
3. The composition as claimed in claim 1, wherein the composition comprises Citrullus lanatus seeds in a weight percentage range of 37.9% to 38.4% of the composition.
4. The composition as claimed in claim 1, wherein the composition comprises citric acid in a weight percentage range of 12.6% to 12.8% of the composition.
5. The composition as claimed in claim 1, wherein the composition comprises tartaric acid in a weight percentage range of 1.28% to 1.5% of the composition.
6. The composition as claimed in claim 1, wherein the composition comprises bicarbonate salt in a weight percentage range of 28% to 28.2% of the composition.
7. The composition as claimed in claim 1, wherein the composition comprises maltitol in a weight percentage range of 15% to 15.8% of the composition.
8. The composition as claimed in claim 1, wherein the bicarbonate salt is selected from potassium bicarbonate, sodium bicarbonate, lithium bicarbonate, magnesium bicarbonate, calcium bicarbonate, or combinations thereof.
9. An effervescent formulation for purification of contaminated water comprising Citrullus lanatus seeds, citric acid, tartaric acid, sodium bicarbonate, maltitol, and an excipient.
10. The formulation as claimed in claim 9, wherein the excipient is selected from fragrance, preservative, flavoring agent, lubricant, sweetening agent, or combinations thereof.
11. The formulation as claimed in claim 9, wherein the formulation is an effervescent tablet formulation.
12. A method of production of the effervescent tablet formulation as claimed in claim 11, wherein the method comprises the steps of: (a) drying, powdering and optionally sieving the Citrullus lanatus seeds; (b) weighing and mixing the citric acid, tartaric acid, sodium bicarbonate, maltitol, and the excipients with the seeds to obtain a homogenous powder; and (c) compressing the powder to give the effervescent tablet formulation.
13. A method of treating contaminated water, wherein the method comprises the steps of: a) exposing the contaminated water to the effervescent composition as claimed in claim 1, and (b) stirring to activate the composition and give treated water.