“Exploring natural coagulants as impending alternatives towards sustainable water clarification” – A comparative studies of natural coagulants with alum

Saritha, Vara; Karnena, Manoj Kumar; Dwarapureddi, Bhavya Kavitha

doi:10.1016/j.jwpe.2019.100982

Cited by 41 publications

(19 citation statements)

References 39 publications

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“…Further 1703, 1740 cm −1 showed that the samples consisted of carboxylic aldehyde groups are responsible for the adsorption phenomenonthe peaks at 2922 and 3676 cm −1 attributed to the presence of carboxylic and aromatic compounds. The colloidal particles' adsorption onto the MO-chitin surface is due to the interaction of charges by the hydrogen bonds of carboxylic and alkali groups (Saritha et al 2019;Araújo et al 2010;Espíndola-Cortés et al 2017). The polymer adsorbed might be stabilized or altered depending on the presence of the number of particles and polymers and their affinity toward water-polymer-particles adsorption (Saritha et al 2019).…”

Section: Ftir Analysismentioning

confidence: 99%

“…The colloidal particles' adsorption onto the MO-chitin surface is due to the interaction of charges by the hydrogen bonds of carboxylic and alkali groups (Saritha et al 2019;Araújo et al 2010;Espíndola-Cortés et al 2017). The polymer adsorbed might be stabilized or altered depending on the presence of the number of particles and polymers and their affinity toward water-polymer-particles adsorption (Saritha et al 2019).…”

Section: Ftir Analysismentioning

confidence: 99%

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Blend of natural coagulants as a sustainable solution for challenges of pollution from aquaculture wastewater

et al. 2022

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Dependency on sea food has increased owing to its nutrition as well as being complete food. As the production of seafood is enhanced through aquaculture, wastewater release has also improved. The composition of wastewater from aquaculture production has been a concern as it has oil and grease, organic content, etc., which makes its treatment challenging. The present study aims at treating aquaculture wastewater using two natural coagulants—chitin and seeds of Moringa oleifera. The efficiency of the natural coagulants was compared against inorganic chemical coagulant ferric chloride. A blended coagulant with two natural coagulants seeds of Moringa oleifera and chitin was also tested. Jar test apparatus was used in the current experiments, and four coagulant doses were tested against 3 pH ranges, from 6 to 8. The study results showed that the coagulants showed a 30–50% reduction in various physicochemical parameters. Further, the most promising result was obtained with the blended coagulants (di-blend) with 70–81% removal of total nitrogen and total phosphorus and the highest reduction of chloride with 95%. The Fourier-transform infrared spectroscopy showed functionalized groups responsible for coagulation, and X-ray powder diffraction analysis of the blended coagulant indicated the crystallinity and amorphous nature of the compounds. Scanning electron microscope analysis presented a firm and dense structure indicating adsorption of impurities onto the coagulant. Thus, it is evident that natural coagulants can be the solution for the challenges of aquaculture wastewater and specifically the di-blend used in the present is ascertained to be a promising solution.

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Section: Ftir Analysismentioning

confidence: 99%

Section: Ftir Analysismentioning

confidence: 99%

Blend of natural coagulants as a sustainable solution for challenges of pollution from aquaculture wastewater

et al. 2022

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“…They successfully reached 67.66%, 96.86% and 91.12% COD, turbidity and colour removal, respectively. Many researchers investigated the performance of other natural coagulants such as potato starch (Ahmad, 2018), papaya seeds (Kristianto et al, 2018), sago, chitin (Saritha, Karnena, & Dwarapureddi, 2019) and okra (Freitas et al, 2015) as possible alternatives to the chemical coagulants. Strychnospotatorum (Nirmali seeds) and Eirchorrniacrassipes (water hyacinth) were seen to give better reduction for total suspended solids (TSS), COD and biological oxygen demand (BOD) over alum (Prabhakaran, Manikandan, & Boopathi, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Until recently, the new trends in the field were directed towards investigating the performance of these natural coagulants on real waste samples for the purpose of finding better alternatives for industrial applications (Dotto et al, 2019;Rambe, 2018;Dos Santos, 2018). Although, some of these studies gave reasonably good results when applied to synthetic waste, but the removal efficiency was comparatively low when applied to real samples (Saritha et al, 2019). Yet many have concluded that MO has a great potential as an alternative coagulant for the treatment of textile waste water regardless of its complex nature (Dotto et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Multi-response optimization of the coagulation process of real textile wastewater using a natural coagulant

Redha

2020

Arab Journal of Basic and Applied Sciences

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The present study is an attempt to investigate the applicability of a natural coagulant Moringa Oleifera (MO) as a potential impending alternative for the treatment of textile wastewater. Face Central Composite Design in Response Surface Methodology was used to optimize the performance of the coagulation process in terms of turbidity and colour removal efficiency. Three independent variables which are pH (2-4), coagulant dosage (4-8 ml) and settling time (10-30 min) were investigated. Quadratic models were developed for each response and their statistical fitness was evaluated using ANOVA analysis. All models were proved to be statistically adequate with R 2 higher than 96%. Of the investigated variables, pH was found to have significant effect on both responses (P-value <0.001), whereas, coagulant dosage affected the colour removal efficiency significantly. Multi-response optimization was applied to optimize the process variables for both responses simultaneously using the RSM desirability function approach. Maximum turbidity reduction by more than 81% and colour removal efficiencies by more than 77% were reached at the optimum conditions of pH 2, coagulant dosage 4 mL and settling time 21 min. These results prove that MO could be used as an alternative to the conventional coagulants for real textile wastewater treatment.

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“…Morris and Knocke reported that ferric chloride was less influenced at a low temperature compared with alum, and they suggest the combination of alum and ferric chloride as a potential method (Morris and Knocke 1984). Recent studies have tested blending alum with natural coagulants in order to reduce the sludge originating from alum and at the same time to reduce the dissolved organic matter caused due to natural coagulants 1 3 20 Page 2 of 11 (Halkude and Pise 2013;Saritha et al 2019;Dwarapureddi et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Competence of blended coagulants for surface water treatment

2019

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Owing to the advantages of the natural coagulants under study, the present objective is to study the efficiency of blended coagulants: alum and chitin; alum and sago; and alum + chitin + sago. In this attempt, we have reduced the quantity of alum dose and added increasing quantities of the natural coagulants. The surface water samples collected from nearby sources were analyzed for the following parameters pre-and post-treatment with the coagulants. Coagulation and flocculation experiments were carried out using conventional jar test apparatus. Turbidity removal was observed to be nearly 99.29% at all pH ranges and doses. Removal of conductivity, solids and hardness was 58.83%, 32.03% and 33.33%, respectively. From the results obtained, it can be observed that the efficiency of blended coagulants in removal of various physicochemical parameters from the waters was better when compared to individual coagulants. The floc size in blend coagulants was larger than that of single coagulants. The data obtained in this study indicated the coagulation efficiency could be enhanced by using the blend coagulant.

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“Exploring natural coagulants as impending alternatives towards sustainable water clarification” – A comparative studies of natural coagulants with alum

Cited by 41 publications

References 39 publications

Blend of natural coagulants as a sustainable solution for challenges of pollution from aquaculture wastewater

Blend of natural coagulants as a sustainable solution for challenges of pollution from aquaculture wastewater

Multi-response optimization of the coagulation process of real textile wastewater using a natural coagulant

Competence of blended coagulants for surface water treatment

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