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γ-MnO2对Tl(Ⅰ)的吸附性能

邓红梅 王耀龙 吴宏海 刘 涛 陈永亨

邓红梅, 王耀龙, 吴宏海, 刘 涛, 陈永亨. γ-MnO2对Tl(Ⅰ)的吸附性能[J]. 环境科学研究, 2015, 28(1): 103-109.
引用本文: 邓红梅, 王耀龙, 吴宏海, 刘 涛, 陈永亨. γ-MnO2对Tl(Ⅰ)的吸附性能[J]. 环境科学研究, 2015, 28(1): 103-109.
DENG Hongmei, WANG Yaolong, WU Honghai, LIU Tao, CHEN Yongheng. Characteristics of Tl(Ⅰ) Adsorption on γ-MnO2[J]. Research of Environmental Sciences, 2015, 28(1): 103-109.
Citation: DENG Hongmei, WANG Yaolong, WU Honghai, LIU Tao, CHEN Yongheng. Characteristics of Tl(Ⅰ) Adsorption on γ-MnO2[J]. Research of Environmental Sciences, 2015, 28(1): 103-109.

γ-MnO2对Tl(Ⅰ)的吸附性能

基金项目: 国家自然科学基金项目(41170399);广东省环境污染控制与修复技术重点实验室(中山大学)基金项目(2013K0010)

Characteristics of Tl(Ⅰ) Adsorption on γ-MnO2

  • 摘要: 通过静态批处理吸附试验,研究了γ-MnO2对Tl(Ⅰ)(铊)的吸附性能,考察了溶液的pH、离子强度、γ-MnO2投加量、接触时间、初始ρ〔Tl(Ⅰ)〕和温度等因素对吸附的影响. 结果表明:在pH为2~3的酸性溶液中,γ-MnO2对Tl(Ⅰ)的吸附容量随着pH的增大而减小;当pH为4~6时,吸附容量随pH的增加而迅速增大;而当pH>6时,吸附达到平衡. γ-MnO2对Tl(Ⅰ)的吸附量随着离子强度的降低、γ-MnO2投加量的减小而增大. γ-MnO2对Tl(Ⅰ)的吸附在15 min内达到平衡,并满足准二级动力学方程. 在温度为288、303、318 K的条件下,初始ρ〔Tl(Ⅰ)〕为10~1 000 mg/L时,最大饱和吸附量分别为53.04、49.05、45.03 mg/g,符合Freundlich吸附等温方程. γ-MnO2对Tl(Ⅰ)的吸附过程是自发的放热过程. 脱附研究表明,γ-MnO2表面的吸附行为属离子交换,并受离子强度影响. 试验证明,γ-MnO2是一种极具潜力的Tl(Ⅰ)吸附剂.

     

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出版历程
  • 收稿日期:  2014-02-07
  • 修回日期:  2014-07-09
  • 刊出日期:  2015-01-25

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