The effectiveness of locally available okra pod powder as natural coagulant under varying pH, dosage and settling time in the removal of turbidity from paint waste water at room temperature has been evaluated. The application of single angle Turbidimeter measurement was employed for the experiment. Such kinetic and functional parameter as coagulation rate constant (<i>K</i>), and coagulation period (<i>τ<sub>1/2</sub></i>) , were determined. Statistical parameters such as coefficient of determination (<i>R<sup>2</sup></i>), sum of squares due to error (SSE), and the root mean square error (RMSE), were used to evaluate the adequacy of the process. The highest value of 1.7×10<sup>﹣4</sup>L/mg.min for K is recorded at pH 4 and 100 mg/L dosage with <i>τ<sub>1/2</sub></i> of 14.91 min and the least value of <i>K</i>, 3.6×10<sup>﹣5</sup>L/mg.min is recorded at pH 8 and 300 mg/L doses with <i>τ<sub>1/2</sub></i> of 70.43 min respectively. The efficiency of turbidity removal of more than 80% and 95% was achieved at the end of 3 mins and 30 mins settling time respectively, indicating a system controlled by perikinetic method of coag-flocculation. The results exhibited the potential of pulverized okra pod for removal of suspended particle from paint wastewater.
KeywordsOkra PodCoag-FlocculationPaint Wastewater and Perikinetics
Aboulhassan, N.A., Souabi, S., Yaacoubi, A. and Baudu, M. (2006) Improvement of Paint Effluents Coagulation Using Natural and Synthetic Coagulatant Aids. Journal of Hazardous Materials, B138, 40-45.
Dovletoglou, O., Philippopoulos, C. and Grigoropoulou, H. (2002) Coagulation for Treatment of Paint Industry Waste- water. Journal of Environmental Science and Health, A37, 1361-1377. http://dx.doi.org/10.1081/ESE-120005992
Amuda, O.S. and Amoo, A. (2006) Coagulation/Flocculation Process and Sludge Conditioning in Beverage Industrial Wastewater Treatment. Journal of Hazardous Materials, 131, 778-783.
Vikashini, N., Matakite, M., Kanayathu, K. and Subramanium, S. (2012) Water Purification Using Moringaoleifera and Other Locally Available Seeds in Fiji for Heavy Metal Removal. International Journal of Applied Science and Technology, 2, 125-129.
Okolo, B.I., Nnaji, P.C., Menkiti, M.C., Ugonabo, V.I. and Onukwuli, O.D. (2014) Application of Single Angle Turbidimetry on Coag-Flocculation Effect of Detarium Microcarpum Seed in Brewery Effluent. Material Science and Application, 5, 415-429.
de Jesus, E., Cruz, P.V., Pacífico, J.A. and Silva, A.S. (2013) Removal of Turbidity, Suspended Solids and Ions of Fe from Aqueous Solution Using Okra Powder by Coagulation-Flocculation Process. American Journal of Water Resources, 1, 20-24.
Jadhav, M.V. and Mahajani, Y.S. (2013) A Comparative Study of Natural Coagulants in Flocculation of Local Clay Suspensions of Varied Turbidities. International Journal of Civil and Environmental Engineering, 35, 26-39.
Peavy, H.S. and Rowe, D.R. (1985) Environmental Engineering. International Edition, McGrew Hill Editions, SANS Publications, Pretoria.
Okuda, T., Baes, A.U., Nishijima, W. and Okada, M. (1999) Improvement of Extraction Method of Coagulation Active Components from Moringa Oleifera Seed. Water Research, 3, 3373-3378. http://dx.doi.org/10.1016/S0043-1354(99)00046-9
Miller, G.R., Kopfler, F.C., Kelty, K.C., Stober, J.A. and Ulmer, N.S. (1984) The Occurrence of Aluminum in Drinking Water. Journal of American Water Works Association, 76, 84-91.
Schintu, M., Meloni, P. and Contu, A. (1984) Aluminum Fractions in Drinking Water from Reservoirs. Ecotoxicology and Environmental Safety, 46, 29-35. http://dx.doi.org/10.1006/eesa.1999.1887
Pitchai, R., Subramanian, R., Selvapathy, P. and Elangovan, R. (1992) Aluminum Content of Drinking Water in Madras City. Proceedings of the International Workshop on Aluminum in Drinking Water, Hongkong, 81-84.
Crapper, D.R., Krishnan, S.S. and Dalton, A.J. (1973) Brain Aluminum in Alzheimer’s Disease Experiment at Neurofibrillary Degeneration. Science, 180, 511-513. http://dx.doi.org/10.1126/science.180.4085.511
Ghebremichael, K.A., Gunaratna, K.R., Henriksson, H., Brumer, H. and Dalhammar, G. (2005) A Simple Purification and Activity Assay of the Coagulant Protein from Moringa oleifera Seed. Journal of Water Research, 39, 2338-2344.
Muyibi, S.A. and Okuofu, C.A. (1995) Coagulation of Low Turbidity Surface Waters with Moringa oleifera Seeds. International Journal of Environmental Studies, 48, 263-273. http://dx.doi.org/10.1080/00207239508710996
Madsen, M., Schlundt, J. and Omer, E.F.E. (1987) Effect of Water Coagulation by Seeds of Moringa oleifera on Bacterial Concentration. Journal of Tropical Medicine and Hygiene, 90, 101-109.
Bhatia, S., Othman, Z. and Ahmad, A.L. (2006) Palm Oil Mill Effluent Pretreatment Using Moringa oleifera Seeds as an Environmentally Friendly Coagulant: Laboratory and Pilot Plant Studies. Journal of Chemical Technology and Biotechnology, 81, 1852-1858. http://dx.doi.org/10.1002/jctb.1619
Von Smoluchowski, M. (1917) Versuch einer mathematischen theorie der koagulations—Kinetics kolloid losungen. International Journal of Research in Physical Chemistry and Chemical Physics, 92, 129-168.
Holtholf, H., Egelhaaf, S.U., Brokovec, M., Sharteh-Berger, P. and Sticher, H. (1996) Coagulation Rate Measurement of Colloidal Particles by Simultaneous Static and Dynamic Light Scattering. Journal of American Chemical Society, 12, 5541-5549.
Hidalgo-Alvarez, R., Martin, A., Fernandez, A., Bastos, D., Martinez, F. and de las Nieves, F.J. (1996) Electrokinetic Properties, Colloidal Stability and Aggregation Kinetics of Polymer Colloids. Advances in Colloid and Interface Science, 67, 1-118.
Hunter, R.J. (1993) Introduction to Modern Colloid Science. Oxford University Press, New York, 33-38, 289-290.
Okolo, B.I., Nnaji, P.C., Menkiti, M.C., Ugonabo, V.I. and Onukwuli, O.D. (2014) Parametric Response Evaluation for Xanthosoma spp. Induced Coag-Flocculation of Brewery Effluent. Green and Sustainable Chemistry, 4, 7-14. http://dx.doi.org/10.4236/gsc.2014.41002
Van Zanten, J.H. and Elimelechi, M. (1992) Determination of Rate Constants by Multi Angle Light Scattering. Journal of Colloid and Interface, 154, 1-7.
Broide, M.L. and Cohen, R.J. (1992) Measurements of Cluster-Size Distributions Arising in Salt-Induced Aggregation of Polystyrene Microspheres. Journal of Colloid and Interface Science, 153, 493-508. http://dx.doi.org/10.1016/0021-9797(92)90340-R
Metcalf, W. and Eddy, C. (2003) Wastewater Engineering: Treatment and Reuse. 4th Edition, McGraw Hill Inc., New York.
AWWA, APHA and WEF (2012) Standard Methods for the Examination of Water and Wastewater. 22nd Edition, New York.
Agarwal, M., Rajani, S., Mishra, A. and Rai, J.S.P. (2003) Utilization of Okra Gum for Treatment of Tannery Effluent. International Journal of Polymeric Materials, 52, 1049-1057. http://dx.doi.org/10.1080/714975900
AOAC (1993) Official Methods of Analysis. 14th Edition, Association of Official Analytical Chemist, USA.
Sonntag, H. and Strenge, K. (1987) Coagulation Kinetics and Structure Formation. Plenum Press, New York.
Chatterjee, T., Chatterjee, S. and Noo, S.H. (2004) Enhanced Coagulation of Bentonite Particles in Water by a Modified Chitosan Biopolymer. Chemical Engineering Journal, 148, 414-419.
Nnaji, P.C., Okolo, B.I. and Menkiti, M.C. (2014) Nephelometric Performance Evaluation of Oxidized Starch in the Treatment of Coal Washery Effluent. Natural Resources, 5, 79-89. http://dx.doi.org/10.4236/nr.2014.53009
Huang, C. and Pan, J.R. (2002) Coagulation Approach to Water Treatment, Encyclopedia of Surface and Colloid Science. 2nd Edition, Marcel Dekker Inc., New York, 5667.
Duan, J.M. and Gregory, J. (2003) Coagulation by Hydrolysing Metal Salts. Advances in Colloid and Interface Science, 100-102, 475-502. http://dx.doi.org/10.1016/S0001-8686(02)00067-2
Menkiti, M.C. and Onukwuli, O.D. (2011) Coag-Flocculation Studies of Afzelia belia Coagulant (ABC) in Coal Effluent Using Single and Simulated Multiangle Nephelometry. Journal of Minerals and Materials Characterization and Engineering, 10, 279-298.