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OALib Journal期刊
ISSN: 2333-9721
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强抗镉真菌月状旋孢腔菌对重金属的吸附作用
DOI: 10.3724/SP.J.1145.2013.00694, PP. 694-698
Keywords: 镉污染,重金属抗性,月状旋孢腔菌,生物吸附
Abstract:
分离到的1株真菌月状旋孢腔菌（cochlioboluslunatus）cd7，可在2000mgl-1镉（cd2+）液体培养液中存活，显示菌株具有较强的抗镉能力.吸附实验结果表明，菌丝球投加量为2gl-1时，无论菌丝球灭活与否，菌株对cd2+的吸附率随cd2+浓度的升高而下降，吸附量随cd2+浓度的升高而增加.当cd2+浓度100mgl-1以下时，灭活菌丝球对cd2+的吸附量为活菌丝球的70%以上.菌丝球投加量为0.5-3.0gl-1，菌株对cd2+的吸附率随菌丝球投加量增加而增加，吸附量随菌丝球投加量的增加而急剧减少.ph6.0、金属离子浓度为100mgl-1时，菌丝球对单一cd2+、pb2+、cu2+和zn2+离子的平均吸附量顺序为：cd2+＞zn2+＞cu2+＞pb2+.金属离子的共存抑制菌体对各离子的吸附，离子种类越多，抑制作用越明显.图3表2参23
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