Removal of turbidity from drinking water using natural coagulants

被引:104
作者
Muthuraman, G. [1 ]
Sasikala, S. [1 ]
机构
[1] Presidency Coll, Dept Chem, Madras 600005, Tamil Nadu, India
关键词
Coagulation; Moringa oleifera; Strychnos potatorum; Phaseolus vulgaris; Turbidity;
D O I
10.1016/j.jiec.2013.08.023
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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. An improved and alternative method for the extraction of the active coagulant agent M. oleifera, S. potatorum, P. vulgaris seeds was developed and compared with the conventional water extraction method. In the new method the seeds were extracted using different solvents of NaCl and NaOH to extract the active coagulant agent from natural coagulants. In addition, ultrasound was investigated as a potential method to assist the extraction process. Batch coagulation experiments were conducted to evaluate the performance of the extracted coagulant achieved through various schemes. The optimum turbidity removal at different values of initial synthetic wastewater turbidity from 100 to 500 NTU was investigated. Sodium chloride at 0.5 M was found to provide a high turbidity removal of >99% compared to NaOH and distilled water extract. Among these three coagulant M. oleifera seed extracts is the highest performance in turbidity removal. The optimum coagulant dosage showed the coagulation with blended coagulant M. oleifera, S. potatorum and P. vulgaris. The study was carried out for initial turbidity of the sample such as 100 NTU (low), 250 NTU (medium) and 500 NTU (high). For the natural coagulant dosage was found to be 250-1000 mg/L respectively. It was found that the percentage of removal is highest in M. oleifera. (C) 2013 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry.
引用
收藏
页码:1727 / 1731
页数:5
相关论文
共 22 条
[1]   Improvement of paint effluents coagulation using natural and synthetic coagulant aids [J].
Aboulhassan, M. A. ;
Souabi, S. ;
Yaacoubi, A. ;
Baudu, M. .
JOURNAL OF HAZARDOUS MATERIALS, 2006, 138 (01) :40-45
[2]   COMPOSITION OF THE COAGULANT POLYSACCHARIDE FRACTION FROM STRYCHNOS-POTATORUM SEEDS [J].
ADINOLFI, M ;
CORSARO, MM ;
LANZETTA, R ;
PARRILLI, M ;
FOLKARD, G ;
GRANT, W ;
SUTHERLAND, J .
CARBOHYDRATE RESEARCH, 1994, 263 (01) :103-110
[3]   Proteins from common bean (Phaseolus vulgaris) seed as a natural coagulant for potential application in water turbidity removal [J].
Antov, Mirjana G. ;
Sciban, Marina B. ;
Petrovic, Nada J. .
BIORESOURCE TECHNOLOGY, 2010, 101 (07) :2167-2172
[4]  
Ashokshenoy K., 2001, INDIAN J PHARM, V33, P260
[5]  
Asima C., 2001, TREATISE INDIAN MED, V4, P85
[6]   Flocculation of river silt using chitosan [J].
Divakaran, R ;
Pillai, VNS .
WATER RESEARCH, 2002, 36 (09) :2414-2418
[8]  
JAHN SAA, 1988, J AM WATER WORKS ASS, V80, P43
[9]   Use of grape seed and its natural polyphenol extracts as a natural organic coagulant for removal of cationic dyes [J].
Jeon, Jong-Rok ;
Kim, Eun-Ju ;
Kim, Young-Mo ;
Murugesan, Kumarasamy ;
Kim, Jae-Hwan ;
Chang, Yoon-Seok .
CHEMOSPHERE, 2009, 77 (08) :1090-1098
[10]  
John ASIEN S.A.A.J., 1994, MANAGE OPER, V50, P45