کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5756861 1622623 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Feasibility study on the application of coal gangue as landfill liner material
ترجمه فارسی عنوان
بررسی امکان سنجی استفاده از بندهای زغال سنگ به عنوان مواد زباله های زباله
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی
Coal gangue is one of the largest industrial solid waste all over the world, and many methods have been proposed for the recycling of coal gangue. In the present study, the feasibility of using coal gangue as landfill liner material is studied through a series of laboratory tests in terms of hydraulic conductivity, sorption characteristics and leaching behavior. The results indicated that the hydraulic conductivity of coal gangue could be smaller than the regulatory requirement 1 × 10−7 cm/s with a void ratio less than 0.60. The batch sorption experiments performed on Pb2+ and Zn2+ illustrated that the coal gangue showed remarkable sorption capacity for the two heavy metals, and the sorption capacity for Pb2+ was larger than that for Zn2+. Both the pseudo first-order and pseudo second-order models fitted well with the sorption kinetics data of the Pb2+ and Zn2+ on the coal gangue, and the Langmuir model was found to best-fit the sorption isotherms. The sorption capacity decreased in presence of multiple heavy metals, both for Pb2+ and Zn2+. Concentrations of heavy metals leached from the coal gangue were all below the regulatory limits from China MEP and U.S. EPA. These desirable characteristics indicated that the coal gangue has potential to be used as landfill liner materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 63, May 2017, Pages 161-171
نویسندگان
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