| 汞在腐殖酸上的吸附与解吸特征 |
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| 引用本文： | 余贵芬,青长乐,牟树森,魏世强.汞在腐殖酸上的吸附与解吸特征[J].环境科学学报,2001,21(5):601-606. |
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| 作者姓名： | 余贵芬 青长乐 牟树森 魏世强 |
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| 作者单位： | 1. 西南农业大学资源与环境学院,重庆,400716;中国科学院南京土壤研究所,南京,210008
2. 西南农业大学资源与环境学院,重庆,400716 |
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| 基金项目： | 国家教委博士点基金项目 (970 6 0 1) |
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| 摘 要： | 采用间歇法研究了汞在腐殖酸两组分（富里酸FA、胡敏酸HA）上的吸附－解吸量和动力学特征以及介质pH的影响，结果表明,腐殖酸对汞的吸附容量以FA＞HA，吸附强度以HA＞FA，从而使得解吸量以FA－Hg＞HA－Hg，腐殖酸与汞的吸附和解吸动力学，用Evolich方程描述最佳，且FA对汞的吸附速率和解吸速率都高于HA，在pH15．5以下，介质pH的升高利于腐殖酸更快地吸附更大量的汞，咀更难以解吸。
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| 关 键 词： | 腐殖酸 汞 吸附 解吸 特征 间歇法 土壤监测 |
| 文章编号： | 0253-2468(2001)-05-0601-06 |
| 收稿时间： | 2000/11/1 0:00:00 |
| 修稿时间： | 2000年11月1日 |
Characteristics of mercury adsorption and desorption on humic acids |
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| YU Guifen,QING Changle,MOU Shusen and WEI Shiqiang.Characteristics of mercury adsorption and desorption on humic acids[J].Acta Scientiae Circumstantiae,2001,21(5):601-606. |
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| Authors: | YU Guifen QING Changle MOU Shusen and WEI Shiqiang |
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| Institution: | 1. College of Resources and Environment, Southwest Agricultural University, Chongqing 400716; 2. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,College of Resources and Environment, Southwest Agricultural University, Chongqing 400716,College of Resources and Environment, Southwest Agricultural University, Chongqing 400716 and College of Resources and Environment, Southwest Agricultural University, Chongqing 400716 |
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| Abstract: | The amount and kinetics characteristics of mercury adsorption and desorption on two species of humic acids (FA and HA) and the effect of pH were studied by batch technique. Results showed that the adsorption capacity of mercury on FA is larger than on HA and adsorption strength of HA is larger than of FA. The desorption amount is in the sequence of FA Hg>HA Hg. Adsorption and desorption kinetics of mercury on humic acids fitted with Evolich equations the best. The speed of mercury adsorption on and desorption from FA is higher than that of HA. Humic acids able to adsorb more mercury with higher speed as medium pH increased and the adsorbed mercury is more difficult to desorb under the condition of pH<55. |
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| Keywords: | humic acids mercury adsorption desorption |
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