天然水体中优势菌种非活性细胞对Pb^(2+)和Cd^(2+)的吸附及其影响因素

Relationship between the biosorption of Pb^(2+) and Cd^(2+) onto the dominant dead bacteria in natural water and influencing factors

研究了长春市伊通河天然水体中优势菌种非活性细胞对Pb2+和Cd2+的吸附及其影响因素.发现细菌生物量对非活性细胞吸附Pb2+的影响比对Cd2+的影响大;细菌对Pb2+的吸附在pH=4.5时吸附量最大,而对Cd2+的吸附在pH=6.0时吸附量最大;细菌对Pb2+和Cd2+的吸附在30℃最大;当Pb2+和Cd2+共存时,Pb2+对细菌吸附Cd2+的影响不显著,细菌对Pb2+的吸附量随Cd2+浓度的增大而减少.

The biosorption of (Cd^(2+)) and (Pb^(2+)) onto the dominant dead bacteria in the Yitong River and the effects of temperature, initial pH, initial metal ions and bacteria biomass on the biosorption were investigated. The results show that bacteria biomass had more influence on (Pb^(2+)) biosorption than on (Cd^(2+)) biosorption. The (bacteria) show the highest (Pb^(2+)) (uptake) capacities at an initial pH value of (4.5), and show the highest (Cd^(2+)) (uptake) capacities at an initial pH value of (6.0.) The (bacteria) exhibited the highest (Pb^(2+)) and (Cd^(2+)) uptake (capacities) at 30 ℃. The (concomitant ) (Pb^(2+)) had no considerable effect on the biosorption of (Cd^(2+)), and the (concomitant ) (Cd^(2+)) had a considerable effect on the biosorption of (Pb^(2+)).