Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/18964
Title: Ni2+ removal and recovery from electroplating effluent by Pseudomonas putida 5-x cell biomass
Authors: Wang, L
Chua, H
Wong, PK
Lo, WH 
Yu, PHF
Keywords: Biosorption
Cell pretreatment
Desorption
Growth phase
Ni2+
Pseudomonas putida
Issue Date: 2003
Publisher: Marcel Dekker Inc
Source: Journal of environmental science and health - part a toxic/hazardous substances and environmental engineering, 2003, v. 38, no. 3, p. 521-531 How to cite?
Journal: Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering 
Abstract: Ni2+ and Cu2+ are the major heavy metal ions in electroplating wastewater of Hong Kong. In the present study, Pseudomonas putida 5-x cell biomass was used to remove Ni2+ from electroplating effluent. Ni2+ adsorption capacity of P. putida 5-x cell biomass cultured in sulphate-limiting medium was found to be minimum in early logarithmic growth phase, and maximum of 28.1 mg g-1 in late stationary growth phase. Pretreated cells by 0.1 mol L-1 HCl could greatly enhance the Ni2+ adsorption capacity of cell biomass from 28.1 to 36.7 mg g-1 and had no significant effect on biomass loss. The adsorption process of P. putida 5-x fresh cells and pretreated cell all could be expressed with Freundlich isotherm. TEM analyses indicated that acidic pretreatment degraded the superficial layer-capsule outside of the fresh cell to improve the adsorption capacity of cell to Ni2+. The Ni2+ bound by P. putida 5-x cell biomass could be efficiently recovered using 0.1 mol L-1 HCl, and the cell biomass could be reused at least five cycles for Ni2+ removal and recovery with 93% above removal efficiency and 98% above recovery rate. Owing to the Cu2+ presented in electroplating wastewater inhibiting Ni2+ adsorption process by P. putida 5-x cell biomass, two-stage biosorption processes should be designed to remove and recover Cu2+ and Ni2+ sequentially from electroplating effluent.
URI: http://hdl.handle.net/10397/18964
ISSN: 1093-4529
DOI: 10.1081/ESE-120016912
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