ORIGINAL RESEARCH
Immobilizing Metal-Resistant Sulfate-Reducing
Bacteria for Cadmium Removal
from Aqueous Solutions
| 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 |
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
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
Online publication date: 2018-06-28
Publication 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
Water treatmentBiological and chemical treatmentWastewater engineeringHeavy metals contamination of water
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.
