摘要
从温州东方集团电镀厂废水池淤泥中分离到一株抗Cu2 +细菌 ,经鉴定为铜绿单胞菌 (Pseudomonsaerug inosa)。并进一步研究了该菌对Cu2 +吸附行为与影响吸附的主要因素 ,其中包括吸附剂与Cu2 +接触反应时间、Cu2 +浓度、原初pH。结果表明 :该吸附剂对Cu2 +有较强的吸附能力 ,最大吸附量为 1 4.45mg/g,pH对此菌的吸附效果有很大影响 ,最佳pH为 4.0 ,Cu2 +浓度在 1 0～ 80mg/L范围内 ,吸附量为 1 0 .2 1～ 1 4.45mg/g ,吸附反应在lh基本达到平衡。吸附过程符合Freundlich和Langmuir吸附等温方程 :Cu2 +和H+对吸附剂上的化学基团有明显的吸附竞争。
A strain of bacterium were screened from electroplating sludge and wastewater in Wenzhou galvanization factory in this experiment,it was identified as Pseudomonas aeruginosa. The influence of contact time,concentraion of Cu 2+ and initial pH were studied.The results showed that the biosorbent had strong adsorption ability,and the maximum uptake could reach 14.45 mg/g dry weight biomass.The uptake of Cu 2+ was significantly affected by the initial pH of the solution,the optimum initial pH value was 4.0,when the concentration of Cu 2+ ranged between 10～80 mg/L and the specifle uptake was 10.21～14.45 mg/g.The biosorption equilibrium was achieved after 1h.Biosorption process is well accord with Freundlich and Langmuir model.The competitive biosorption of H + and Cu 2+ on the active groups is significant.
出处
《江西科学》
2002年第2期85-89,共5页
Jiangxi Science
基金
温州市科技计划项目 (S2 0 0 0A3 1 )
浙江省教育厅科研项目 (2 0 0 1 0 1 2 4)
