Effects of Organic Matter on Mercury Adsorption-Desorption in Brown Soil

LI Jie-ying; LIANG Cheng-hua; DU Li-yu

doi:10.13961/j.cnki.stbctb.2014.06.013

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Effects of Organic Matter on Mercury Adsorption-Desorption in Brown Soil

- Effects of Organic Matter on Mercury Adsorption-Desorption in Brown Soil
- Bulletin of Soiland Water Conservation Vol. 33, Issue 6, Pages: 32-35(2014)
- 作者机构：
  
  1. 沈阳农业大学土地与环境学院,辽宁,沈阳,110161
  2. 抚顺矿业集团有限责任公司工程技术研究中心,辽宁,抚顺,113008
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2014.06.013
  CLC：
- Published：2014
- 稿件说明：
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LI Jie-ying, LIANG Cheng-hua, DU Li-yu. Effects of Organic Matter on Mercury Adsorption-Desorption in Brown Soil[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 32-35.
DOI：

LI Jie-ying, LIANG Cheng-hua, DU Li-yu. Effects of Organic Matter on Mercury Adsorption-Desorption in Brown Soil[J]. Bulletin of Soiland Water Conservation, 2014, 33(6): 32-35. DOI： 10.13961/j.cnki.stbctb.2014.06.013.

摘要

对去除有机质前后汞(Ⅱ)在棕壤中吸附-解吸行为进行了分析。结果表明

有机质对棕壤汞的吸附贡献很大。去除有机质后

棕壤对汞(Ⅱ)的吸附率由95.62%~93.18%下降到62.8%~56.70%

解吸率则由2.39%~7.47%提高到2.65%~11.23%。Freundlich方程

Langmuir方程

Henry模型以及Temkin方程均能较好地描述去除有机质前后棕壤对汞的等温吸附过程。动力学方程拟合结果表明

棕壤去除有机质后

对汞(Ⅱ)的吸附-解吸速率均降低

其中Elovich方程和双常数方程拟合效果最优

均达到极显著相关关系(R>0.708)。

Abstract

The adsorption-desorption behavior of Hg(Ⅱ) in brown soil was studied to find the difference of the behavior with and without organic matter(OM). The results showed that OM has a great influence on the adsorption-desorption of mercury in brown soil. Without OM

brown soil adsorption rate for Hg(Ⅱ) dropped from 95.62%~93.18% to 62.8%~56.70%

desorption rate rose from 2.39%~7.47% to 2.65%~11.23%. Freundlich equation

Langmuir equation

Henry model and Temkin equation can well describe the isothermal adsorption on mercury process in brown soil with and without OM. The matching result of dynamics equation showed

brown soil adsorption-desorption rate for Hg(Ⅱ) was reduced after OM was removed

elovich equation and double constant equation were optimum

it reached highly significant positive correlation(R>0.708).

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references

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