کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
575868 | 1453062 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Soil retention of hexavalent chromium released from construction and demolition waste in a road-base-application scenario
ترجمه فارسی عنوان
احتباس خاک از کروم شش ظرفیتی از زباله های ساخت و ساز و تخریب در یک برنامه کاربردی پایه کاربرد جاده ای
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کلمات کلیدی
CECSFAICP-OESC&DWL/S - L / SInductively coupled plasma optical emission spectrometry - اسپکترومتر نوری نوری پلاسما به صورت القایی متصل شده استLOD یا Limit of detection - حد تشخیصConstruction and demolition waste - زباله های ساخت و ساز و تخریبMunicipal solid waste incineration bottom ash - شهرداری زباله های جامد زباله خاکسترCEC, Cation exchange capacity - ظرفیت تبادل کاتیونیlimit of detection - محدودیت تشخیصLiquid to solid ratio - نسبت مایع به جامد
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
چکیده انگلیسی
We investigated the retention of Cr(VI) in three subsoils with low organic matter content in laboratory experiments at concentration levels relevant to represent leachates from construction and demolition waste (C&DW) reused as unbound material in road construction. The retention mechanism appeared to be reduction and subsequent precipitation as Cr(III) on the soil. The reduction process was slow and in several experiments it was still proceeding at the end of the six-month experimental period. The overall retention reaction fit well with a second-order reaction governed by actual Cr(VI) concentration and reduction capacity of the soil. The experimentally determined reduction capacities and second-order kinetic parameters were used to model, for a 100-year period, the one-dimensional migration of Cr(VI) in the subsoil under a layer of C&DW. The resulting Cr(VI) concentration would be negligible below 7-70Â cm depth. However, in rigid climates and with high water infiltration through the road pavement, the reduction reaction could be so slow that Cr(VI) might migrate as deep as 200Â cm under the road. The reaction parameters and the model can form the basis for systematically assessing under which scenarios Cr(VI) from C&DW could lead to an environmental issue for ground- and receiving surface waters.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 298, 15 November 2015, Pages 361-367
Journal: Journal of Hazardous Materials - Volume 298, 15 November 2015, Pages 361-367
نویسندگان
Stefania Butera, Stefan Trapp, Thomas F. Astrup, Thomas H. Christensen,