کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
577035 | 1453096 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ionic strength reduction and flow interruption enhanced colloid-facilitated Hg transport in contaminated soils
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ionic strength reduction and flow interruption enhanced colloid-facilitated Hg transport in contaminated soils Ionic strength reduction and flow interruption enhanced colloid-facilitated Hg transport in contaminated soils](/preview/png/577035.png)
چکیده انگلیسی
The effects of ionic strength (IS) reduction (5-0.05 mM) and flow interruption (FI, flow stopped for 7 d) on colloid and Hg release in the leachate were examined in column experiment. Two Hg contaminated soils (13.9 and 146 mg/kg) were used, with Hg concentrations in colloids being 2-4 times greater than bulk soils. Based on sequential extraction, Hg concentrations in organic matter (OM) fraction were the most abundant in soils (31-48%). Column leaching after IS reduction and FI released large amounts of colloidal Hg, accounting for 44-48% of released Hg. The highest colloidal Hg concentrations at 27.8 and 360 μg/L were observed at â¼1 pore volume after FI. Concentration distribution of colloidal OM and colloidal Fe was similar to colloidal Hg in the leachate, showing peak concentrations after IS reduction and FI. Most of the released colloidal Hg was in OM fraction (37-53%), with some in Fe/Mn oxide fraction (11-19%). Based on composition of released colloids and Hg fractionation in soils and colloids, colloidal OM could serve as an important carrier for Hg transport in soils.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 264, 15 January 2014, Pages 286-292
Journal: Journal of Hazardous Materials - Volume 264, 15 January 2014, Pages 286-292
نویسندگان
Yingjia Zhu, Lena Q. Ma, Xiaoling Dong, Willie G. Harris, J.C. Bonzongo, Fengxiang Han,