ORIGINAL RESEARCH
Immobilizing Metal-Resistant Sulfate-Reducing Bacteria for Cadmium Removal from Aqueous Solutions
Hongguo Zhang 1, 2, 3
,  
Huosheng Li 4  
,  
Meng Li 1
,  
Dinggui Luo 1, 2, 5
,  
Yongheng Chen 2, 4
,  
Diyun Chen 1, 5
,  
Hailing Luo 1
,  
Zhenxin Chen 1
,  
 
 
More details
Hide details
1
School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
2
Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
3
Guangzhou University-Linköping University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou, China
4
Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou, China
5
Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, China
Online publish date: 2018-06-28
Publish date: 2018-07-09
Submission date: 2017-09-13
Final revision date: 2018-01-03
Acceptance date: 2018-01-20
 
Pol. J. Environ. Stud. 2018;27(6):2851–2859
KEYWORDS:
TOPICS:
ABSTRACT:
Immobilized sulfate-reducing bacteria (SRB) in polyvinyl alcohol (PVA)-sodium alginate matrix were applied as biosorbents to remove cadmium (Cd) from aqueous solutions. Multiple characterization techniques including scanning electron microscope (SEM)-energy dispersive spectrometer (EDS), and Fourier transform infrared (FT-IR) spectra indicate that immobilized beads provided a suitable microenvironment for SRB. Performance tests show that Cd removal was highly affected by pH value and temperature, with optimum temperature at 35ºC and pH value of 8.0. A pseudo second-order model was applied to describe the adsorption kinetic. FT-IR and x-ray photoelectron spectroscopy (XPS) analyses imply that biosorption, sulfide, and hydroxide precipitation are the main mechanisms for removing Cd. The immobilized SRB beads have great potential for remediating Cd-containing wastewater.
CORRESPONDING AUTHOR:
Huosheng Li   
Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou, China, Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou, China, 510006 Guangzhou, China
eISSN:2083-5906
ISSN:1230-1485