Volume No. 5 Issue No.: 2 Page No.: 375-383 October-December 201

 

THE REMOVAL OF Cd, Cr, Cu, Ni, AND Pb FROM A SYNTHETIC WASTEWATER EFFLUENT BY AN ENVIRONMENTAL BACTERIAL CONSORTIUM

 

Sannasi P.*1, Salmijah S., Kader J. and Othman O2

1. Faculty of Applied Science, INTI International University, Bandar Baru Nilai, Nilai, N. Sembilan (MALAYSIA)
2. Faculty of Science and Technology, Universiti Kebangsaan Malaysia UKM Bangi, Selangor D.E. (MALAYSIA)

 

Received on : May 23, 2010

 

ABSTRACT

 

This study describes the removal of heavy metals (Cd, Cr, Cu, Ni, and Pb) from a synthetic wastewater effluent by consortium culture (CC), an environmental bacterial consortium. The metal removal capability of growing (active) and non-growing (inactive) CC cells in heavy metal containing synthetic wastewater (SWW) and deionised distilled water (ddH2O) were examined by determining percentage metal removal (% MR) over a 7 day period. Metal removal capability was tested at both high (1/5) and low (1/10) metal concentration strengths to imitate occurrence of heavy metal pollution in the natural environment due to industrial activities. Growing cells of CC showed higher removal of Pb (49-69 %), Cu (45-61 %) and Cr (55-67 %) in SWW whereas non-growing cells removed more of Cd (100 %) and Ni (72-94%) (p < 0.05). It was observed that non-growing cells achieved equilibrium earlier with quicker metal removal (by day 1-3) as opposed to growing cells. However, % MR by growing cells was higher in samples with elevated initial concentration of total metals (p < 0.05). Results of this study indicate the possibility of employing CC in both growing (active) and non-growing (inactive) variety to fulfill varying waste conditions and to cater for in situ and ex situ heavy metal laden waste treatment.

 

Keywords : Synthetic wastewater, Heavy metal, Consortium culture, Metal removal, Metallurgy

 

 

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