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| 不同浓度组合的镉、铅在不同污染负荷土壤中的吸附-解吸动力学行为 | |
| 引用本文： | 陈苏,孙丽娜,晁雷,周启星,孙铁珩.不同浓度组合的镉、铅在不同污染负荷土壤中的吸附-解吸动力学行为[J].应用基础与工程科学学报,2007,15(1):32-44. |
| 作者姓名： | 陈苏 孙丽娜 晁雷 周启星 孙铁珩 |
| 作者单位： | 1. 中国科学院沈阳应用生态研究所,辽宁,沈阳,110016;沈阳大学环境工程重点实验室,辽宁,沈阳,110044;中国科学院研究生院,北京,100039 2. 沈阳大学环境工程重点实验室,辽宁,沈阳,110044 3. 中国科学院沈阳应用生态研究所,辽宁,沈阳,110016;中国科学院研究生院,北京,100039 4. 中国科学院沈阳应用生态研究所,辽宁,沈阳,110016 5. 中国科学院沈阳应用生态研究所,辽宁,沈阳,110016;沈阳大学环境工程重点实验室,辽宁,沈阳,110044 |
| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金 |
| 摘 要： | 采用批实验法对沈阳张士灌区2种不同重金属污染负荷的土壤（A清洁土壤；B高污染土壤）中不同浓度组合的Cd^2＋和Pb^2＋的吸附．解吸动力学行为进行比较研究．结果表明，清洁土壤A对Cd^2＋和Pb^2＋的吸附能力高于高污染负荷土壤B．Elovich方程是描述这2种土壤Cd^2＋和Pb^2＋吸附动力学行为的最优模型，其次为双常数方程，最差模型是一级动力学方程．2种土壤Cd^2＋、Pb^2＋的解吸速率随重金属初始浓度增加而增加，随解吸时间的延长而不断降低．描述这2种土壤Cd^2＋、Pb^2＋解吸动力学过程的最优模型为Elovich方程，其次为双常数方程，而一级动力学方程拟合效果不佳． |
| 关 键 词： | 镉 铅 重金属污染负荷 吸附-解吸动力学 |
| 文章编号： | 24242813 |
| 修稿时间： | 06 2 2006 12:00AM |
Sorption-desorption Dynamic Behavior of Cadmium,Lead with Different Concentrations Combination in Different Metal Burden Soils |
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| CHEN Su,SUN Lina,CHAO Lei,ZHOU Qixing,SUN Tieheng.Sorption-desorption Dynamic Behavior of Cadmium,Lead with Different Concentrations Combination in Different Metal Burden Soils[J].Journal of Basic Science and Engineering,2007,15(1):32-44. | |
| Authors: | CHEN Su SUN Lina CHAO Lei ZHOU Qixing SUN Tieheng |
| Institution: | 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 2. Key Laboratory of Environment Engineering of Shenyang University, Shenyang 110044, China; 3. Graduate School of Chinese Academy of Sciences,Beijing 100039 ,China |
| Abstract: | orption-desorption dynamic behavior of Cd,Pb with different concentrations was studied by the batch method on two different metal burden soils(A:clean soil;B:high polluted soil) of Zhangshi irrigation area in Shenyang.The results indicated that the sorption capacity of clean soil to Cd2+ and Pb2+ was larger than that of higher metal burden soil.Elovich equation was the best model to describe the sorption kinetics of Cd2+ and Pb2+,and then was two-constant equation,the worst model was first-order dynamics equation.The desorptive rates of Cd2+ and Pb2+ in two soils were increased with the higher initial concentrations of Cd2+ and Pb2+ in the treatments,and decreased with the increasing desorpive time.Elovich equation was the optimal model to describe the desorption kinetics of Cd2+ and Pb2+ in the two soils,and then was two-constant equation,while the relative effect of first-order dynamics equation was not good. |
| Keywords: | Cd Pb heavy metal burden sorption-desorption dynamic |
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