Authors

Department of Chemistry, Presidency college, Chennai-05, India

Abstract

The  Natural coagulant Vigna mungo, Zea mays were used to remove the turbidity from synthetic wastewater . Vigna mungo, Zea mays are ancient crop and having high proteins and nutrients. Chemical coagulants used it induce Alzheimer’s, Carcinogenic and neurotoxic health effects. This is alternative method for turbidity removal in synthetic wastewater. In this study Vigna mungo, Zea mays, Allium cepa ash, waste tea powder ash, Phyllanthus niruri ash used for turbidity removal. Vigna mungo seeds extract have highest percentage (90%) turbidity removal compared to Zea mays (76%). Microwave and ultrasonic assisted both methods are very efficient; 87% of  turbidity removal achieved for Vigna mungo; 70% for Zea mays.  Allium cepa peel ash, Waste tea powder ash, Phyllanthus niruri ash approximately almost above 95% of turbidity removal achieved. The various optimized parameters were studied and results are discussed. Natural coagulants are eco-friendly method for turbidity removal because the sludge disposal is very easy. The sludge it can be used as biocompost or biofertilizer.

Keywords

1.     Kakoi, B., J.W. Kaluli, P. Ndiba and G. Thiong’o, 2016. Banana pith as a natural coagulant for polluted river water. Ecological Engineering, 95: 699-705.
2.     Antov, M.G., M.B. Šćiban and N.J. Petrović, 2010. Proteins from common bean (Phaseolus vulgaris) seed as a natural coagulant for potential application in water turbidity removal. Bioresource technology, 101(7): 2167-2172.
3.     Radoiu, M.T., D.I. Martin, I. Calinescu and H. Iovu, 2004. Preparation of polyelectrolytes for wastewater treatment. Journal of Hazardous Materials, 106(1): 27-37.
4.     Šćiban, M., M. Klašnja, M. Antov and B. Škrbić, 2009. Removal of water turbidity by natural coagulants obtained from chestnut and acorn. Bioresource technology, 100(24): 6639-6643.
5.     Li, J., S. Jiao, L. Zhong, J. Pan and Q. Ma, 2013. Optimizing coagulation and flocculation process for kaolinite suspension with chitosan. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 428: 100-110.
6.     Xu, W., Q. Yue, B. Gao and B. Du, 2015. Impacts of organic coagulant aid on purification performance and membrane fouling of coagulation/ultrafiltration hybrid process with different Al-based coagulants. Desalination, 363: 126-133.
7.     Kimura, M., Y. Matsui, K. Kondo, T.B. Ishikawa, T. Matsushita and N. Shirasaki, 2013. Minimizing residual aluminum concentration in treated water by tailoring properties of polyaluminum coagulants. Water research, 47(6): 2075-2084.
8.     Ganjidoust, H., K. Tatsumi, T. Yamagishi and R. Gholian, 1997. Effect of synthetic and natural coagulant on lignin removal from pulp and paper wastewater. Water Science and Technology, 35(2-3): 291-296.
9.     Okuda, T., A.U. Baes, W. Nishijima and M. Okada, 1999. Improvement of extraction method of coagulation active components from Moringa oleifera seed. Water research, 33(15): 3373-3378.
10.   Tripathi, P., N. Chaudhuri and S. Bokil, 1976. Nirmali seed a naturally occurring coagulant. Indian J. Environ. Health, 18(4).
11.   Teh, C.Y., T.Y. Wu and J.C. Juan, 2014. Potential use of rice starch in coagulation–flocculation process of agro-industrial wastewater: treatment performance and flocs characterization. Ecological Engineering, 71: 509-519.
12.   Muthuraman, G. and S. Sasikala, 2014. Removal of turbidity from drinking water using natural coagulants. Journal of Industrial and Engineering Chemistry, 20(4): 1727-1731.
13.   Yin, C.-Y., 2010. Emerging usage of plant-based coagulants for water and wastewater treatment. Process Biochemistry, 45(9): 1437-1444.
14.   Abidin, Z.Z., N.S.M. Shamsudin, N. Madehi and S. Sobri, 2013. Optimisation of a method to extract the active coagulant agent from Jatropha curcas seeds for use in turbidity removal. Industrial Crops and Products, 41: 319-323.
15.   Abo-El-Enein, S., M. Eissa, A. Diafullah, M. Rizk and F. Mohamed, 2011. Utilization of a low cost agro-residue for production of coagulant aids and their applications. Journal of hazardous materials, 186(2): 1200-1205.
16.   Choy, S.Y., K.N. Prasad, T.Y. Wu, M.E. Raghunandan and R.N. Ramanan, 2016. Performance of conventional starches as natural coagulants for turbidity removal. Ecological Engineering, 94: 352-364.
17.   Yang, Z.L., B.Y. Gao, Q.Y. Yue and Y. Wang, 2010. Effect of pH on the coagulation performance of Al-based coagulants and residual aluminum speciation during the treatment of humic acid–kaolin synthetic water. Journal of Hazardous Materials, 178(1): 596-603.
18.   Bhatia, S., Z. Othman and A.L. Ahmad, 2007. Pretreatment of palm oil mill effluent (POME) using Moringa oleifera seeds as natural coagulant. Journal of Hazardous Materials, 145(1): 120-126.
19.   Bhatia, S., Z. Othman and A.L. Ahmad, 2007. Coagulation–flocculation process for POME treatment using Moringa oleifera seeds extract: Optimization studies. Chemical Engineering Journal, 133(1): 205-212.
20.   Sengupta, M.E., B. Keraita, A. Olsen, O.K. Boateng, S.M. Thamsborg, G.R. Pálsdóttir and A. Dalsgaard, 2012. Use of Moringa oleifera seed extracts to reduce helminth egg numbers and turbidity in irrigation water. Water research, 46(11): 3646-3656.
21.   Kukić, D.V., M.B. Šćiban, J.M. Prodanović, A.N. Tepić and M.A. Vasić, 2015. Extracts of fava bean (Vicia faba L.) seeds as natural coagulants. Ecological Engineering, 84: 229-232.
22.   Choy, S.Y., K.M.N. Prasad, T.Y. Wu, M.E. Raghunandan and R.N. Ramanan, 2014. Utilization of plant-based natural coagulants as future alternatives towards sustainable water clarification. Journal of environmental sciences, 26(11): 2178-2189.
23.   Ramavandi, B., 2014. Treatment of water turbidity and bacteria by using a coagulant extracted from Plantago ovata. Water Resources and Industry, 6: 36-50.