کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6633157 | 461089 | 2016 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Impacts of pH on leaching potential of elements from MSW incineration fly ash
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In this study, leaching behaviors of aluminum (Al), calcium (Ca), potassium (K), sodium (Na), barium (Ba), copper (Cu), manganese (Mn), zinc (Zn), arsenic (As), silver (Ag), chromium (Cr), cadmium (Cd), lead (Pb), selenium (Se), and sulfate (SO42â) from fresh and aged municipal solid waste incineration (MSWI) fly ashes under different pH conditions (pH â¼Â 2-14) were investigated. Results showed that majority of the elements followed a cationic leaching pattern where the leached element concentrations from fly ashes decreased with an increase in pH. Only Al, Ba, As, and Se showed different leaching patterns. Maximum concentrations of leached Al and As were measured at extreme acidic (pH â¼Â 2) and basic (pH â¼Â 12) conditions consistent with an amphoteric leaching pattern. Leached Se and Ba reached peak concentrations at very alkaline conditions (pH > 11) following an oxyanionic leaching pattern. Geochemical modeling analyses were conducted to determine controlling mechanisms of leaching of these elements. Leaching of elements, except As, Se, Ag, and Cr, were controlled by the dissolution/precipitation of their (hydr)oxides, carbonate or sulfate solids. Leaching of Cr may be controlled by BaCrO4(s), while no solid phases were found that controlled leaching of As, Se, and Ag. Sorption control leaching mechanisms should be included to determine the leaching mechanisms of these three elements. Leached element concentrations and leaching controlling mechanisms were not affected significantly by aging of the MSWI fly ash.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 184, 15 November 2016, Pages 815-825
Journal: Fuel - Volume 184, 15 November 2016, Pages 815-825
نویسندگان
Y. Zhang, B. Cetin, W.J. Likos, T.B. Edil,