Guan Xiao-hui, Qin Yu-chun, Zhao Jie, Wei De-zhou
Department of Applied Chemistry, Northeast China Institute of Electric Power Engineering, Jilin 132012, China.
Huan Jing Ke Xue. 2005 Nov;26(6):94-6.
As biosorbent used Sphaerotilus natans, influencing factors on removal of Pb2+ were investigated such as ratio of the biomass and lead, pH, temperature and time of adsorption. The results show that Sphaerotilus natans has good effect on adsorption of Pb2+. The process of adsorption reached equilibrium in 10 minutes. Temperature has no significant effect on the adsorption. Removal of Pb2+ approached to 100% under the condition of pH 5.5, 0.6 g/L and c0 < or =20 mg/L. The maximum adsorption amount was 2.1 mmol/g dry biomass . The adsorption was fitted with Freundlich isotherm adsorption equation under the concentration of Pb2+ 0-60 mg/L. HCI and EDTA can desorb the Pb2+ from the bacteria effectively.
以浮游球衣菌作为生物吸附剂，研究了生物量与铅的比例、pH值、温度和吸附时间等对Pb2+去除率的影响因素。结果表明，浮游球衣菌对Pb2+具有良好的吸附效果。吸附过程在10分钟内达到平衡。温度对吸附没有显著影响。在pH 5.5、0.6 g/L和c0≤20 mg/L的条件下，Pb2+的去除率接近100%。最大吸附量为2.1 mmol/g干生物量。在Pb2+浓度为0 - 60 mg/L时，吸附符合Freundlich等温吸附方程。盐酸和乙二胺四乙酸（EDTA）能有效地从细菌中解吸Pb2+。
