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穗花狐尾藻铅吸附特征与机理

李国新 颜昌宙 赵 超 王 蕾

李国新, 颜昌宙, 赵 超, 王 蕾. 穗花狐尾藻铅吸附特征与机理[J]. 环境科学研究, 2013, 26(8): 892-898.
引用本文: 李国新, 颜昌宙, 赵 超, 王 蕾. 穗花狐尾藻铅吸附特征与机理[J]. 环境科学研究, 2013, 26(8): 892-898.
LI Guo-xin, YAN Chang-zhou, ZHAO Chao, WANG Lei. Characteristics and Mechanisms of Lead Biosorption on Myriophyllum Spicatum[J]. Research of Environmental Sciences, 2013, 26(8): 892-898.
Citation: LI Guo-xin, YAN Chang-zhou, ZHAO Chao, WANG Lei. Characteristics and Mechanisms of Lead Biosorption on Myriophyllum Spicatum[J]. Research of Environmental Sciences, 2013, 26(8): 892-898.

穗花狐尾藻铅吸附特征与机理

基金项目: 福建省自然科学基金项目(2012J05030);国家自然科学基金项目(50909084,51008262)

Characteristics and Mechanisms of Lead Biosorption on Myriophyllum Spicatum

  • 摘要: 为探讨沉水植物对低浓度重金属废水的吸附特征,研究了不同重金属质量浓度及pH影响下,穗花狐尾藻鲜样在单一、二元和三元金属离子体系中对Pb2+的生物吸附特征及吸附机理. 结果表明,在单一Pb2+体系中,穗花狐尾藻对Pb2+的吸附能力随pH的升高而增强; 当初始ρ(Pb2+)为100mg/L、初始pH为6.5时,Pb2+吸附率可达80.95%. Cu2+和Zn2+的存在负向干扰穗花狐尾藻对Pb2+的吸附; 当初始ρ(Cu2+)和ρ(Pb2+)均为250mg/L时,Cu2+干扰下Pb2+吸附量降低为单一体系中Pb2+吸附量的62.40%. Sips和Langmuir模型的拟合效果优于Freundlich模型. 根据Langmuir模型模拟,穗花狐尾藻对Pb2+的理论最大吸附量(qmax)可达52.12mg/g. 红外光谱分析表明,—OH、—C=O、—COOH、C—O及C—H为主要作用基团. 吸附Pb2+后,溶液中矿质元素含量增加,ρ(Ca2+)和ρ(Mg2+)与初始ρ(Pb2+)达到极显著正相关(RCa2+=0.943,P<0.01;RMg2+=0.915,P<0.01). Pb2+更易与Ca2+和Mg2+产生离子交换而被吸附.

     

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出版历程
  • 收稿日期:  2013-04-19
  • 修回日期:  2013-06-06
  • 刊出日期:  2013-08-25

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