کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6970784 | 1453063 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Diffusion and leachability index studies on stabilization of chromium contaminated soil using fly ash
ترجمه فارسی عنوان
شاخص توزیع و تجزیه و تحلیل شاخص های تثبیت خاک آلوده به کروم با استفاده از خاکسترهای خاکستر
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کلمات کلیدی
کلسیم پلی سولفید، کروم، شاخص لیشوئید، جامد سازی و تثبیت، روش شستشوی مشخصه سمیت،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
چکیده انگلیسی
Experiments were performed to establish a feasible treatment process for the solidification and stabilization (S/S) of soil contaminated by leaching of Cr(VI) from Chromite ore processing residue (COPR). Reduction of the highly mobile Cr(VI) was performed using calcium polysulfide (CaS5) with a dosage of 3 times the molar stoichiometric ratio for the initial concentration of Cr(VI) present in the chromium contaminated soil (CCS). The CCS was solidified and stabilized (S/S) using fly ash (FA) in various proportions i.e., 1:1, 1:2, 1:3 (FA: CCS) with and without using reducing agent i.e., CaS5. Leachability tests such as Toxicity Characteristic Leaching Procedure (TCLP) and semi-dynamic long term leachability tests indicated that the CaS5 was effective in reduction of Cr(VI) followed by the S/S process. Leachability Index was derived from the results of the semi-dynamic long term leachability tests and was between 8 and 9, indicating that FA is an effective treatment for disposal into secured landfills for CCS. The characteristic compressive strength of the CaS5 treated CCS with FA mortar blocks were between 24.47 and 40.49Â kg/cm2. Considering the cost of CaS5 and FA, a total expenditure of Rs. 7826 i.e., US $ 130.4 would be required for remediation of one tonne of CCS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 297, 30 October 2015, Pages 52-58
Journal: Journal of Hazardous Materials - Volume 297, 30 October 2015, Pages 52-58
نویسندگان
Kanchinadham Sri Bala Kameswari, L.M. Narasimman, Vihita Pedaballe, Chitra Kalyanaraman,