| 六氯苯在黄泥土表面吸附的动力学特征 |
| |
| 引用本文： | 郜红建,蒋新,常江,张自立,章力干.六氯苯在黄泥土表面吸附的动力学特征[J].安徽农业大学学报,2007,34(1):30-33. |
| |
| 作者姓名： | 郜红建 蒋新 常江 张自立 章力干 |
| |
| 作者单位： | 安徽农业大学资源与环境学院,合肥,230036;中国科学院南京土壤研究所,南京,210008;中国科学院南京土壤研究所,南京,210008;安徽农业大学资源与环境学院,合肥,230036 |
| |
| 基金项目： | 国家自然科学基金
,
安徽省自然科学基金
,
安徽省高校青年教师科研项目
,
安徽省农产品安全重点实验室基金 |
| |
| 摘 要： | 采用动力学方法研究了六氯苯在黄泥土表面的吸附特征.结果表明,六氯苯在黄泥土表面的吸附量随着六氯苯吸附时间的延长而增加,并且在开始增加的速率较快,而后逐渐减缓,表现出明显的快反应和慢反应两阶段特征.六氯苯在土壤表面的吸附在192 h(8 d)基本可达到表观平衡,其吸附的动力学过程可以用一级动力学方程、Elovich方程和双常数方程进行很好的拟合,其相关系数(r)在0.90～0.98之间,达到显著水平.六氯苯在土壤表面的吸附以Elovich方程为最佳模型,其次为一级动力学方程和双常数方程,这说明六氯苯在土壤表面的吸附过程由表面吸附和内部扩散两个部分组成.
|
| 关 键 词： | 六氯苯 吸附特征 土壤表面 动力学过程 |
| 文章编号： | 1672-352X（2007）01-0030-04 |
| 修稿时间： | 2006-07-13 |
Kinetic sorption characteristics of hexachlorobenzene on Huangni soil surfaces |
| |
| GAO Hong-jian,JIANG Xin,CHANG Jiang,ZHANG Zi-li,ZHANG Li-gan.Kinetic sorption characteristics of hexachlorobenzene on Huangni soil surfaces[J].Journal of Anhui Agricultural University,2007,34(1):30-33. |
| |
| Authors: | GAO Hong-jian JIANG Xin CHANG Jiang ZHANG Zi-li ZHANG Li-gan |
| |
| Institution: | 1. School of Resources and Environment, Anhui Agricultural University, Hefei 230036 ; 2. Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 |
| |
| Abstract: | Kinetic sorption characteristics of hexachlorobenzene (HCB) on Huangni soil surfaces were investigated by using the kinetic experimental methods.The results indicate that,the amount of HCB adsorbed on soils surfaces were gradually increased as the sorption time prolonged.Sorption rates of HCB on Huangni soils were shown to be biphasic,generally involving a fast initial step,followed by a very low sustained approach to apparent equilibrium.In kinetic experiments,apparent sorption equilibrium was reached in eight days,and kinetic curve could be fitted by Elovich equation,dual constant equation and first order kinetic equation.The correlation coefficient(r) ranged from 0.90 to 0.98.Data fitted by Elovich equation was better than by dual constant equation and first order equation,which indicated energy distributions of HCB adsorption onto the soil surface were nonhomogeneous,and the process of HCB adsorbed onto soil involving surfaces sorption and intraparticle diffusion. |
| |
| Keywords: | hexachlorobenzene sorption characteristics soil surface kinetic process |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《安徽农业大学学报》浏览原始摘要信息 |
| 点击此处可从《安徽农业大学学报》下载免费的PDF全文 |
|
