کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8097448 1522071 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Heavy metal removal from aqueous solutions by calcium silicate powder from waste coal fly-ash
ترجمه فارسی عنوان
حذف فلزات سنگین از محلول های آبی توسط پودر سیلیکات کلسیم از زباله های ذغال سنگ، خاکستر
کلمات کلیدی
پودر سیلیکات کلسیم، جذب، فلز سنگین مکانیسم،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
The removal of Ni (II), Cu (II), Zn (II), and Co (II) ions from simulated aqueous solutions using calcium silicate powder (CSP), a new by-product derived from the production of alumina from coal ash, has been studied. CSP showed high efficiency for the removal of these metal ions. The maximum adsorptions were 420.17, 680.93, 251.89, and 235.29 mg/g for Ni (II), Cu (II), Zn (II), and Co (II), respectively. Total (100%) removal of Ni (II) was obtained when the initial concentration was 100 mg/L, indicating that CSP was highly effective even at an extremely low concentration. Adsorption isotherms and kinetics have been studied using different models. It has been found that the adsorption isotherms can best be described on the basis of the Langmuir model, with the kinetics of adsorption following a pseudo-second-order reaction process. The calcium ion concentration was examined before and after adsorption to investigate the mechanism of removal of the heavy metal ions. It was found that the removal of heavy metal ions is mainly achieved through ion-exchange, combined with some adsorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 182, 1 May 2018, Pages 776-782
نویسندگان
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