[Biosorption of Ag+ by heavy metals hyperresistant Bacillus cereus strain HQ-1].
A newly isolated Bacillus cereus strain HQ-1 was found to possess high capability to absorb silver ions. The study showed that the biosorption process could be described well by pseudo-second-order kinetic model and Freundlich isotherm model. Higher cell concentration was favorable to the biosorption. Temperature's effect on the biosorption was not obvious. The oxygenous and nitrogenous functional groups on the cell wall played a very important role in the process of biosorption. Microdeposits were formed by interaction between silver ions and biopolymers from the cell wall (such as polysaccharides, proteins and some hydrolysis).
Zeng
Jing-Hai
JH
Department of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. zengjh04@mails.gucas.ac.cn
Qi
Hong-Yan
HY
Yang
Jian-Zhou
JZ
Hu
Qing
Q
Zhang
Hong-Xun
HX
Zhuang
Guo-Qiang
GQ
D001409:Bacillus cereus / Q000187:drug effects / Q000378:metabolism* / Q000648:ultrastructure; D001673:Biodegradation, Environmental; D001692:Biological Transport; D024881:Drug Resistance, Bacterial; D007220:Industrial Waste / Q000032:analysis; D019216:Metals, Heavy / Q000378:metabolism / Q000493:pharmacokinetics / Q000494:pharmacology; D008855:Microscopy, Electron, Scanning; D012037:Refuse Disposal / Q000379:methods*; D012834:Silver / Q000378:metabolism* / Q000493:pharmacokinetics / Q000494:pharmacology
D007220:Industrial Waste; D019216:Metals, Heavy; D012834:Silver