Sorption of endosulphan sulphate in soil organic matter

被引：3
|
作者：
Chowdhury, Raja [1 ]
Atwater, James W. [2 ]
Hall, Ken J. [2 ]
Parkinson, Paula [2 ]
机构：
[1] Univ Toledo, Dept Chem & Environm Engn, Toledo, OH 43606 USA
[2] Univ British Columbia, Dept Civil Engn, Vancouver, BC V6T 1Z4, Canada
来源：
ENVIRONMENTAL TECHNOLOGY | 2011年 / 32卷 / 16期
关键词：
dialysis bag method; endosulphan sulphate; soil organic matters; solubility enhancement method; sorption; HUMIC SUBSTANCES; BETA-ENDOSULFAN; BINDING; WATER; PESTICIDES; ATRAZINE; ACID; DEGRADATION; PERSISTENCE; POLLUTANTS;
D O I：
10.1080/09593330.2011.567300
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Sorption of endosulphan sulphate in soil organic matter was investigated using Standard Elliot soil humic acid (HA) and soil fulvic acid (FA) at two ionic strengths (0.001 and 0.01). It was observed that divalent calcium ion and ionic strength affect the sorption of endosulphan sulphate in HA. All the experiments were carried out at pH 6.7 +/- 0.1. In the presence and absence of calcium (ionic strength 0.001), the solubility enhancement method was used to estimate the sorption coefficients of endosulphan sulphate in HA. For FA, the solubility enhancement method was used to estimate the sorption coefficients at an ionic strength of 0.001 (in the presence of calcium) and 0.01. The presence of calcium was found to significantly enhance (alpha = 0.01) the solubility of endosulphan sulphate in HA. Sorption coefficients at pH 6.7, obtained using the solubility enhancement method, were found to be 10-21 L/g in HA and 6L/g in FA (in the presence of calcium). Increase in ionic strength from 0.001 to 0.01 decreased the sorption of endosulphan sulphate in HA. The effect of ionic strength and calcium on the sorption of endosulphan sulphate was most satisfactorily explained on the basis of the Donnan volume.
引用
收藏
页码：1875 / 1881
页数：7
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