کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8869761 | 1622609 | 2018 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Release behavior of chloride from MSW landfill simulation reactors with different operation modes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
مهندسی ژئوتکنیک و زمین شناسی مهندسی
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چکیده انگلیسی
The chloride ion (Clâ), a very common monatomic anion, has high ecological toxicity at high concentrations because of its non-biodegradability, and can easily migrate from landfill site into the surrounding environment. Four lab-scale landfill simulation reactors were established to investigate Clâ release behavior: the anaerobic landfill mode (R1), the semi-aerobic landfill mode (R2), the anaerobic landfill with leachate re-circulation mode (R3), and the semi-aerobic landfill with leachate re-circulation mode (R4). The landfill operation modes had a great influence on the release of Clâ. In 256â¯days, the cumulative release amounts of Clâ in the four reactors were 64.52, 132.07, 56.10, and 33.1â¯g for R1-R4, respectively. Once air enters anaerobic landfill, the leachate Clâ concentration may sharply increase. The highest leachate Clâ concentrations were 6.6â¯gâ¯Lâ1 in anaerobic reactor and 18â¯gâ¯Lâ1 in semi-aerobic reactor. However, the leachate re-circulation can maintain the release of Clâ at dynamic equilibrium state. Theoretically, the Clâ release behavior from anaerobic landfill with leachate re-circulation (R3) will be continuous. In contrast, under the other conditions, it can be anticipated to occur once the leachate recirculation stops (R1) or when the landfill encounters air incursion (R2 and R4). The semi-aerobic operation modes had significantly lower COD/Cl and NH4-N/Cl ratios than the anaerobic modes. This indicates that the Clâ pollution risk from semi-aerobic modes is lower than that from anaerobic modes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Waste Management - Volume 77, July 2018, Pages 350-355
Journal: Waste Management - Volume 77, July 2018, Pages 350-355
نویسندگان
Yuyang Long, Dongyun Liu, Jing Xu, Yuan Fang, Yao Du, Dongsheng Shen,