Journal
WATER SCIENCE AND TECHNOLOGY
Volume -, Issue -, Pages -Publisher
IWA PUBLISHING
DOI: 10.2166/wst.2023.259
Keywords
biodegradation; immobilization; phenol; polyurethane
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This study discovered an efficient and rapid method for removing phenol using Bacillus cereus immobilized on a polyurethane carrier. The immobilized bacteria showed higher degradation efficiency and could tolerate different pH values, salt concentrations, and heavy metal ions as compared to free bacteria.
Phenol is a serious pollutant to the environment, therefore, it is urgent to find a rapid and effective method for its removal. In this study, Bacillus cereus ZWB3 immobilized on a polyurethane (PUF) carrier was studied. The PUF-ZWB3 required only 20 h for the degradation of 1,500 mg L-1 of phenol, shortened by 8 h than the free bacteria. In addition, the PUF-ZWB3 could increase the degradation concentration of phenol from 1,500 to 2,000 mg L-1, and the complete degradation of 2,000 mg L-1 phenol only used 44 h. In addition, the PUF-ZWB3 showed much higher removal of phenol than the free bacteria at different pH values, salt concentrations, and heavy metal ions. Particularly, the PUF-ZWB3 could still completely remove phenol in a strongly alkaline environment, such as pH 10 and 11. In addition, the removal efficiency of phenol by PUF-ZWB3 was still 100% after 10 cycles. This study showed that the PUF immobilization system had great potential in the field of remediation of organic pollution.
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