An Extracellular Biopolymer Produced by Pseudomonas alcaligenes as Biosorbent to Remove Copper(II) from Aqueous Solutions

Abstract:

The objective of this study is to assess the potential applicability of an extracellular biopolymer (PA-2) produced by Pseudomonas alcaligenes as biosorbent remove the Cu(II) ions from environmental and industrial wastewater. The effects such as pH, Cu(II) initial concentration and sorbate-sorbent contact time and agitating speed on the adsorption capacities of PA-2 were studied. Biosorption equilibriums were rapidly established in about 60 min and the adsorption kinetics followed the pseudo-second order kinetic model. Biosorption equilibrium datas were better described by Langmuir isotherm model. The maximum Cu(II) adsorption capacity determined from Langmuir isotherm were 81.36 mg /g PA-2. The carboxyl and hydroxyl groups of the PA-2 were involved in chemical interaction with the Cu(II) ions depicted by Fourier transform infrared spectroscopic (FTIR) results. The present study indicated that PA-2 may be used as an inexpensive, effective and easily cultivable biosorbent for the removal of Cu(II) ions from environmental and industrial wastewater.

• Periodical: Advanced Materials Research (Volumes 171-172)
• Pages: 11-14
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.171-172.11
• Online since: December 2010
• Authors: Ling Xian Luo, Tai Zhi Zhang, Lv Bao Tong
• Keywords: Adsorption Isotherm, Adsorption Kinetics, Biosorption, Cu(II), Extracellular Biopolymer

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