Menkiti, M.C., Nnaji, P.C. and Onukwuli, O.D. (2009) Coa-Flocculation Kinetics and Functional Parameters Response of Periwinkle Shell Coagulant (PSC) to pH Variation in Organic Rich Coal Washery Effluent Medium. Nature and Science, 7, 1-18.

has been cited by the following article:

• TITLE: Nephelometric Performance Evaluation of Oxidized Starch in the Treatment of Coal Washery Effluent

  AUTHORS: P. C. Nnaji, B. I. Okolo, M. C. Menkiti

  KEYWORDS: Oxidized Starch; Coal Washery Effluent; Coagulation/Flocculation; Jar Test

  JOURNAL NAME: Natural Resources, Vol.5 No.3, March 28, 2014

  ABSTRACT: This study investigated the coag-flocculation performance of oxidized starch coagulant (OSC) and its blends with alum and FeCl3 in removing turbidity from coal washery effluent at room temperature. A conventional laboratory bench-scale jar test apparatus was employed for the experiments. Coag-flocculation parameters such as reaction order α, rate constant K, coagulation time τ, etc. were determined. The optimum pH was observed at 4.0, while the blend of 30.0 mg/L FeCl3 and 250.0 mg/L OSC achieved the optimum turbidity removal. Turbidity removal efficiency was recorded between 96.0% and 99.9% for various dosages and pH studied. The coagulation rate constants, K recorded range from 9.393 × 10-5 L/mg.min to 8.294 × 10-1 min-1, while coagulation periods τ, range from 3.8 s to 235.7 s for various dosages and pH studied. The use of OSC blended with FeCl3 showed high level of efficiency, for the treatment of coal washery effluent.