Coag-Flocculation Kinetics of Mucuna sloanei Seed for Phosphorus Removal from Waste Water


Mucuna sloanei (MS) an environmentally friendly biomass was used as a coagulant for treatment of phosphorus containing waste water. The study evaluates the coag-flocculation efficiency of MS and its functional kinetic parameter response to varying pH and dosage of the waste water effluent. Coag-flocculation reaction order α, coag-flocculation rate constant K, and coagulation period τ1/2 were determined. The maximum coag-flocculation performance (97.4%) is recorded at rate constant, K of 1.24 × 10-4 l/mg·min, dosage of 400 mg/l, pH of 8 and coagulation period τ1/2 of 0.100 min while the minimum (61%) is recorded at K of 3 × 10-5 l/gm·min, dosage 100 mg/l, pH of 2 and τ1/2 of 8.900 mins. The results confirm that MS coagulant is an effective coagulant obeying the theory of fast coagulation in the conditions of the experiments.

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K. Babayemi, O. Onukwuli, M. Menkiti and A. Okewale, "Coag-Flocculation Kinetics of Mucuna sloanei Seed for Phosphorus Removal from Waste Water," American Journal of Analytical Chemistry, Vol. 4 No. 12, 2013, pp. 732-738. doi: 10.4236/ajac.2013.412088.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] J.-Q. Jiang and N. J. D. Graham, “Observations of the Comparative Hydrolysis/Precipitation Behavior of Poly Ferric Sulphate and Ferric Sulphate,” Water Research, Vol. 32, 1998, pp. 930-935.
[2] Ozacar and A. Sengli, “Effectiveness of Tannins Obtained from Velunia as a Coagulant Aid for Dewatering of Sludge,” Water Research, Vol. 34, No. 4, 2002, pp. 1407-1412.
[3] A. Ndabigengesere and K. S. Narasiah, “Quality of Water Treated by Coagulation Using Moringa Oleifera Seeds,” Water Research, Vol. 32, No. 3, 1998, pp. 781-791.
[4] M. A. Oladoja and Y. D. Ahu, “Evaluation of Plantain Peelings Ash Extract as Coagulant of Colloidal Particle in Low pH Aqua System,” Water Quality Research Journal of Canada, Vol. 43, No. 2-3, 2008, p. 231.
[5] G. A. F. Roberts, A. Domard and K. M. Varum, International Conference on Chitin and Chitosan and 2nd International Conference of the European Chitin Society, Jacques Publisher, Lyon, 1998.
[6] A. Uzomah and O. S. Odusanya, “Mucuna sloanei, Detarium Micro Carpum and Brachstegia Eurycoma Seeds: A Preliminary Study of Their Starch-Hydrocolloicds System,” African Journal of Food Science, Vol. 5, No. 13, 2011, pp. 733-740.
[7] Wanjekeche, et al., “Effect of Germination, Alkaline and Acid Soaking and Boiling on the Nutritional Value of Mature and Immature Mucuna Beam,” Tropical and Subtropical Agroecosystems, Vol. 1, 2003, pp. 183-192.
[8] M. E. Infante, et al., “Outbreak of Acute Psychosis Attributed to Mucuna Pruriens,” Lancet, Vol. 336, No. 8723, 1990, p. 1129.
[9] M. Strivastava and V. P. Kapoor, “Seed Galactomannans: An Overview,” Chemistry & Biodiversity, Vol. 2, No. 3, 2005, pp. 295-317.
[10] L. M. Nwokocha and P. A. Williams, “Isolation and Rheological Characterization of Mucuna Flagellipes Seed Gum,” Food Hydrocolloids, Vol. 23, No. 5, 2009, pp. 1394-1397.
[11] S. A. Teixeira, et al., “Isolation of a Lectin and a Galactoxyloglucan from Mucuna sloanei Seeds,” Phytochemistry, Vol. 70, No. 17-18, 2009, pp. 1965-1972.
[12] Fernandez-Kin, “Physio Chemical and Functional Properties of Craw Fish Chitosan as Affected by Different Processing Protocols,” M.Sc. Thesis, Louisiana State University and Agricultural and Mechanical College, USA, 2004.
[13] Water Specialist Technology (WST), “About Coagulation and Flocculation,” Information Bulletins, USA, 2003, pp. 1-10.
[14] AWWA, “Standard Methods for the Examination of Water and Waste Water Effluent,” New York, 2005.
[15] M. Von Smoluchowski, “Versuchener Mathematischen Theorie der Koagulations Kinetic Kolloider Lougsungen,” Zeitschrift für Physikalische Chemie, Vol. 92, 1917, pp. 129-168.
[16] H. Holthof, et al., “Coagulation Rate Measurement of Colloidal Particles by Simultaneous Static and Dynamic Light Scattering,” Langmuir, Vol. 12, No. 23, 1996, p. 5541.
[17] H. A. Nicholls, “Ortho Kinetic Flocculation of Phosphate Precipitates in a Multi Compartment Reactor with MonIdeal Flow,” Programme of Water Technology, Pergamon Press, 1999, pp. 61-88.
[18] M. C. Menkiti, “Sequential Treatment of Coal Washery Effluents by Bio Coag-Flocculation and Activated Carbon Adsorption,” Ph.D Thesis, Nnamdi Azikiwe University, Nigeria, 2010.
[19] M. C. Menkiti and O. D. Onukwuli, “Coag-Flocculation Studies of Afzella Bella Coagulant (ABC) in Coal Effluent Using Single and Simulated Multi Angle Nephelometry,” Journal of Minerals and Materials Characterization and Engineering, Vol. 10, No. 3, 2011, pp. 279-298.

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