Removal of turbidity from drinking water using natural coagulants
25 Jul 2014-Journal of Industrial and Engineering Chemistry (Elsevier)-Vol. 20, Iss: 4, pp 1727-1731
TL;DR: The ability of three plant materials, seeds such as Moringa oleifera, Strychnos potatorum and Phaseolus vulgaris, to act as natural coagulants was tested using synthetic turbid water formulated to resemble the drinking water as discussed by the authors.
About: This article is published in Journal of Industrial and Engineering Chemistry.The article was published on 2014-07-25. It has received 136 citations till now. The article focuses on the topics: Strychnos potatorum & Water extraction.
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TL;DR: In this paper, a comparative study of the efficiency of different coagulants in textile wastewater treatment was carried out, and the results showed that the use of natural coagulate instead of synthetic ones has demonstrated significant advantages since it provides a low cost and environmentally friendly technology for removing dyes.
248 citations
TL;DR: In this paper, the potential use of natural Cassia obtusifolia seed gum in treatment of raw and undiluted pulp and paper mill effluent through coagulation process was investigated.
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TL;DR: The efficiency of adsorption technique was found up to 90% for DBP removal from the water, and several regulations have been specified by world authorities like WHO, USEPA and Bureau of Indian Standard to protect human health.
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TL;DR: A review of plant-based coagulants, their notable milestones achieved, chemistry involved, as well as bench, pilot and full scale trials, highlighting the effects of plant based coagULants on physico-bio-chemical properties of raw water is presented in this article.
89 citations
TL;DR: The main active components involved in the processes, the most significant mechanisms identified, seed processing techniques and some practical applications, and the main trends in the field, as well as provides comments and recommendations for further developments and identifies knowledge gaps and future research directions as discussed by the authors.
Abstract: Using “greener” processes to treat wastewater has become increasingly popular because these processes are environmentally friendly and offer a wide variety of other benefits, such as reducing costs, reducing the generation of by-products, and providing greater biodegradability. In particular, Moringa oleifera (MO) has historically been used as a natural coagulant to treat contaminated effluents and it continues to be used today. This paper is a collection of information related with using MO in contemporary applications, mainly wastewater treatment. It reviews the main active components involved in the processes, the most significant mechanisms identified, seed processing techniques and some practical applications, and the main trends in the field, as well as provides comments and recommendations for further developments and identifies knowledge gaps and future research directions.
73 citations
References
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TL;DR: The combined evidence linking Al and AD warrants substantial research efforts, which should focus on clarification of the cellular and molecular mechanisms in Al toxicity and of the basic metabolism and kinetics of Al in the human body.
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TL;DR: In this article, the efficiency and properties of Moringa oleifera as a natural coagulant in water treatment were studied and compared with alum, which is presently the most widely used industrial coagulateant.
758 citations
TL;DR: In this article, a new method for the extraction of the active coagulation component from Moringa oleifera seeds was developed and compared with the ordinary water extraction method (MOC-DW).
328 citations
TL;DR: Flocculation of silt in river water using chitosan was studied in the pH range 4-9, and suspended solid concentrations in the range 20-80 mg/L and the amount required for restabilisation increases with increasing concentration of suspended solids.
173 citations
TL;DR: In this paper, the use of Moringa oleifera seed extracts both as primary coagulant and its conjunctive use with alum in treating low turbidity waters was studied.
Abstract: The use of Moringa oleifera seed extracts both as primary coagulant coagulant aid and its conjunctive use with alum in treating low turbidity waters was studied. The laboratory based studies used the natural polyelectrolyte to treat waters with turbidities between 23 and 90 ntu, obtained from three surface water sources in Kano, Nigeria. On the average, 50% turbidity removal was achieved when Moringa oleifera was used as primary coagulant. In combination with alum, the rates at which floes were formed were the same or often faster than with alum alone. In this study, between 40 and 80% savings in alum was observed. When used as a coagulant aid, the optimum dose was found to be 10 mg/1 while that of alum was 20 mg/1. Finally, it was observed that the time Moringa oleifera is applied (after slow mixing), is critical in determining the efficiency of coagulation. The optimum time for this was found to be 50 seconds after slow mixing.
109 citations