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| 湿地水环境中表层沉积物吸附铅、镉能力的研究 | |
| 引用本文： | 李鱼,王晓丽,陈昕,董德明,刘亮,李青山,李兴春.湿地水环境中表层沉积物吸附铅、镉能力的研究[J].吉林大学学报(地球科学版),2005,35(2):231-235. |
| 作者姓名： | 李鱼 王晓丽 陈昕 董德明 刘亮 李青山 李兴春 |
| 作者单位： | 1. 吉林大学,环境与资源学院,吉林,长春,130023 2. 松辽流域水资源保护局,吉林,长春,130021 3. 吉林大学,环境与资源学院,吉林,长春,130023;松辽流域水资源保护局,吉林,长春,130021 |
| 基金项目： | 国家自然科学基金 , 高等学校博士学科点专项科研项目 |
| 摘 要： | 在选定的实验条件下,对向海自然保护区5个不同类型湿地水体的表层沉积物样品进行了铅、镉的热力学吸附实验.结果表明,沉积物样品吸附铅、镉的过程符合Langmuir和Freundlich(n=8,p= 0.01) 等温吸附曲线.在所讨论的范围内,沉积物样品吸附铅、镉的能力与样品中铁、锰氧化物及有机质含量存在着显著的相关性.表层沉积物吸附铅、镉的能力小于生物膜吸附铅、镉的能力,即在湿地水环境中,生物膜对重金属迁移转化的作用相对于表层沉积物而言更重要. |
| 关 键 词： | 湿地水环境 表层沉积物 生物膜 铅 镉 吸附 湿地水环境 表层沉积物 膜吸附 能力 研究 Wetland Environments Aquatic Surface Sediments Adsorption 作用 迁移转化 重金属 生物膜 相关性 存在 含量 有机质 锰氧化物 范围 |
| 文章编号： | 1671-5888(2005)02-0231-05 |
| 修稿时间： | 2004年6月4日 |
Study on Adsorption Capacities of Pb and Cd onto Surface Sediments Collected in the Aquatic Environments of Wetland |
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| LI Yu,WANG Xiao-li,CHEN Xin,DONG De-ming,LIU Liang,LI Qing-shan,LI Xing-chun.Study on Adsorption Capacities of Pb and Cd onto Surface Sediments Collected in the Aquatic Environments of Wetland[J].Journal of Jilin Unviersity:Earth Science Edition,2005,35(2):231-235. | |
| Authors: | LI Yu WANG Xiao-li CHEN Xin DONG De-ming LIU Liang LI Qing-shan LI Xing-chun |
| Abstract: | Pb and Cd adsorption to the surface sediments, which was obtained from different waters in Xianghai natural preservation areas, was investigated. According to the results of the experiments, adsorption of Cd and Pb by surface sediments could be fitted by Langmuir and Freundlich(n=8,p=(0.01)) adsorption isotherms. The maximum adsorption of Pb to surface sediments increased with incre-(asing) of the content of Fe oxides in surface sediments with significant correlation, but decreased with increasing of the content of organic matter; and meanwhile, the greater Cd adsorption was found for surface sediments with higher organic matter and/or Fe and Mn contents at constant pH. Compared with the results of surface coatings, it could be found that the adsorption capabilities of Pb and Cd to surface sediments was less than that of Pb and Cd to surface coatings, implying that in the aquatic environment of wetland, surface coatings is more important for transferring and transforming of metals than surface sediments. |
| Keywords: | aquatic environments in wetland surface sediments surface coatings Pb Cd adsorption |
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