| 冻融作用对土壤镉动力学吸附解吸的影响 |
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| 引用本文： | 王展,张良,党秀丽,张玉龙.冻融作用对土壤镉动力学吸附解吸的影响[J].环境科学学报,2012,32(3):721-725. |
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| 作者姓名： | 王展 张良 党秀丽 张玉龙 |
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| 作者单位： | 1. 沈阳农业大学土地与环境学院,沈阳,110866
2. 沈阳农业大学生物科学技术学院,沈阳,110866 |
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| 基金项目： | 国家重点基础研究发展(973)计划(No.2004CB418504);辽宁省博士启动基金(No.20101094) |
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| 摘 要： | 为了研究冻融作用对土壤镉吸附解吸过程的影响,采用人工控温、室内培养方法对土壤进行冻融处理,并通过土壤镉动力学吸附解吸试验,分析了土壤对镉的吸附解吸量、吸附解吸率及吸附解吸速率.结果表明,冻融作用能够促进土壤对外源镉的吸附,镉的吸附量、吸附率和吸附速率均随着冻融次数的增加而增加.同时,冻融作用能减缓土壤对镉的解吸,随着冻融次数的增加,土壤对镉的解吸速率和解吸率降低,土壤镉解吸速率的下降率随冻融次数的增加而增大.
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| 关 键 词： | 土壤 镉 冻融作用 吸附解吸 动力学 |
| 收稿时间： | 2011/5/15 0:00:00 |
| 修稿时间： | 2011/7/26 0:00:00 |
Effect of the freezing-thawing on kinetics of adsorption-desorption of the soil cadmium |
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| WANG Zhan,ZHANG Liang,DANG Xiuli and ZHANG Yulong.Effect of the freezing-thawing on kinetics of adsorption-desorption of the soil cadmium[J].Acta Scientiae Circumstantiae,2012,32(3):721-725. |
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| Authors: | WANG Zhan ZHANG Liang DANG Xiuli and ZHANG Yulong |
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| Institution: | Department of Soil and Environment, Shenyang Agricultural University,Shenyang 110866;Department of Biological Science and Technology, Shenyang Agricultural University, Shenyang 110866;Department of Soil and Environment, Shenyang Agricultural University,Shenyang 110866;Department of Soil and Environment, Shenyang Agricultural University,Shenyang 110866 |
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| Abstract: | In order to investigate the effect of freezing-thawing on the adsorption-desorption of cadmium,kinetics adsorption isotherms of soil contained with cadmium and the quantity, ratio and speed of adsorption-desorption under freezing-thawing conditions were carried out. The results showed that freezing-thawing promoted cadmium adsorption of the soil. The quantity, ratio and speed of cadmium adsorption increased with the increase of freezing-thawing frequency. Freezing-thawing retarded soil cadmium desorption. With the increasing freezing-thawing cycles, the speed and ratio of soil cadmium desorption decreased and the decrement of the soil cadmium desorption speed increased. |
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| Keywords: | soil cadmium freezing-thawing adsorption-desorption kinetics |
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