| 溶液pH对自然水体中多种固相介质吸附铅、镉、铜影响的比较 |
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| 引用本文： | 郭媛媛,杜显元,刘亮,花修艺,董德明.溶液pH对自然水体中多种固相介质吸附铅、镉、铜影响的比较[J].吉林大学学报(地球科学版),2008,38(3):479-483. |
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| 作者姓名： | 郭媛媛 杜显元 刘亮 花修艺 董德明 |
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| 作者单位： | 吉林大学,环境与资源学院,长春,130012;吉林大学,环境与资源学院,长春,130012;吉林大学,环境与资源学院,长春,130012;吉林大学,环境与资源学院,长春,130012;吉林大学,环境与资源学院,长春,130012 |
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| 摘 要： | 采用实验室内模拟吸附方法,研究不同溶液pH下沉积物、悬浮颗粒物和生物膜吸附重金属的热力学特征。结果表明:在不同pH下,Langmuir方程均可以很好地描述自然水体三种固相介质吸附重金属的热力学过程。在相同pH条件下,三种固相介质对重金属的吸附能力从大到小依次为悬浮颗粒物、生物膜、沉积物,它们对重金属的吸附能力为铅>铜>镉;这三种固相介质对重金属的吸附能力都随着pH值的升高而增大,其中悬浮颗粒物对重金属的吸附能力受溶液pH影响最大;另外,相对于铜和镉,三种固相介质对铅的吸附受溶液pH影响较大。
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| 关 键 词： | 生物膜 悬浮颗粒物 沉积物 重金属 吸附 pH |
| 文章编号： | 1671-5888(2008)03-0479-05 |
| 修稿时间： | 2007年11月18 |
Comparison of Effect of Solution pH on the Adsorption of Pb, Cd, Cu to Solid Phases in Natural Water |
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| GUO Yuan-yuan,DU Xian-yuan,LIU Liang,HUA Xiu-yi,DONG De-ming.Comparison of Effect of Solution pH on the Adsorption of Pb, Cd, Cu to Solid Phases in Natural Water[J].Journal of Jilin Unviersity:Earth Science Edition,2008,38(3):479-483. |
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| Authors: | GUO Yuan-yuan DU Xian-yuan LIU Liang HUA Xiu-yi DONG De-ming |
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| Abstract: | Simulating adsorption experiments were carried out to investigate adsorption thermodynamic characteristics of heavy metals to deposited sediments(DS),suspended particulate material(SPM) and surface coatings(SC) at different solution pH.The results indicated that Langmuir equation can be used to describe the adsorption thermodynamic processes of heavy metals well to those in the three solid phases.The decreasing order of adsorption capacity of the solid phases was SPM,SC and DS at the same pH,the adsorption capacity of heavy metals to the three solid phases was Pb>Cu>Cd;The adsorption capacity of the three solid phases was increased with the solution pH value,in which the adsorption capacity of SPM was influenced greatly by pH;Comparing with Cu and Cd,the effect of pH value on Pb adsorption to three solid phases was the most remarkable. |
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| Keywords: | surface coating suspended particulate material deposited sediment heavy metal adsorption pH |
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