细菌菌株MS1的铅锌抗性和吸附性能研究

Pb and Zn Resistance and Adsorption of Bacterial Strain MS1

从广东凡口铅锌尾矿分离到1株重金属抗性细菌菌株MS1,该菌株对Pb2+和Zn2+的最大耐受浓度分别为4、40 mmol/L.菌株MS1能在17～37℃和pH 3～13条件下生长,最适生长温度和pH分别为27℃和7.菌株MS1对高渗透环境有较强的适应性,最适生长盐度为4%.当Pb2+和Zn2+浓度分别为2、10 mmol/L时,60 h内菌株MS1对Pb2+和Zn2+的最大吸附量和最大吸附率分别为13.9、20.0 mg/g和23.3%、25.2%.菌株MS1对Zn2+的吸附能力大于对Pb2+的吸附能力.

A heavy metal- resistance bacterial strain MS1 was isolated from the Fankou Pb -Zn mine tailings in Guangdong Province. The minimum inhibiting concentrations of Pb2＋ and Zn2 ＋ to the strain were 4 and 40 mmol/L, respectively. Strain MS1 could grow at temperatures 17 - 37 ℃, pH 3 - 13 and high salinity conditions, with opti- mal conditions of temperature 27 ℃, pH 7.0 and 5% salinity. The maximum adsorption quantities and the maxi- mum adsorption rates of strain MS1 to Pb2＋ and Zn2＋ were 13.9, 20. 0 mg/g and 23.3%, 25.2% at 2 mmol/L Pb2＋ and 10 mmol/L Zn2＋ within 60 h, respectively. The adsorption ability of strain MS1 to Zn2＋ was greater than Pb2＋ In a word, strain MS1 had strong resistance and adsorption ability to Pb2＋and Zn2＋ , and could be used to remediate heavy metal polluted water.