کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7001122 1454757 2018 23 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modified silica gel surface with chelating ligand for effective mercury ions adsorption
ترجمه فارسی عنوان
سطح سیلیکا اصلاح شده با لیگاند شیمیایی برای جذب یون های مضر جیوه
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
چکیده انگلیسی
The electron-donating group dithiocarbamate functionalized silica gel (SG-PDC) was prepared and used for adsorption of metal ions from aqueous solution. The modified silica gel was characterized by fourier transform infrared spectroscopy (FT-IR), elemental analysis (EA) and scanning electron microscopy (SEM). It showed excellent adsorption selectivity for Hg(II) ions over other metal ions, such as Cu(II), Cd(II), Pb(II). Kinetics and equilibrium isotherms of Hg (II) sorption were determined in batch equilibrium experiments. The adsorption capacity for Hg (II) of SG-PDC was more than five times as much as that of unmodified silica gel. X-ray photoelectron spectroscopy (XPS) was applied to study the adsorption mechanism and it confirmed that the improvement in mercury adsorption was related to the ligand groups containing S and N atoms anchored on the surface of silica gel. The adsorbent had high reusability after several adsorption-desorption cycles. This study provided a feasible strategy to develop the effective sorbent for Hg (II) ions by covalently modification of silica gel with ligand containing multiple coordination sites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surfaces and Interfaces - Volume 12, September 2018, Pages 108-115
نویسندگان
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