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This work investigates the influence of pH variation on coag-flocculation kinetics and performance of Chitin Derived Coag-flocculant (CDC) in removal of Suspended and Dissolved Particles (SDP) from Coal washery effluent (CWE) medium. Key parameters such as rate constant K m , half life τ 1/2, , and pH etc. were investigated. The best coag-flocculation performance is recorded at K m, of 0.007 l/mg.min, τ 1/2, of 0.0362min, pH of 8, dosage of 100mg/l and efficiency E(%) of 99.933. Minimumdoi:10.4236/jmmce.2011.1015109 fatcat:bbrvyfv42baqdieogjsfixxpmi