کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6664118 1427043 2018 34 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simultaneous adsorption of silver nanoparticles and silver ions on large pore mesoporous silica
ترجمه فارسی عنوان
جذب همزمان نانوذرات نقره و یونهای نقره بر روی سیلیس سیلیکا مزوپور
کلمات کلیدی
سیلیس مایع منسجم زیاد، تعادل جذب، سینتیک جذب، نانوذرات نقره، یون های نقره ای،
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
چکیده انگلیسی
Large pore mesoporous silica was synthesized using citric acid as template and modified with mercaptopropyl trimethoxysilane. The MP-Silica exhibited a surface area of 474 m2 g−1 with an average pore diameter of 11 nm (pore diameter ranging from 2 to 30 nm). The material was used in the adsorption of silver ions, AgNPs and simultaneous adsorption of these silver species was also observed. The adsorption of silver ions occurred rapidly and followed a pseudo-second order kinetic model. The adsorption equilibrium of silver ions could be described with a Langmuir isotherm and the maximum adsorption capacity was found to be 114.9 mg g−1. In the mixture of AgNPs and silver ions, the adsorption of AgNPs followed a pseudo-second order kinetic model and took place more slowly compared to silver ions due to their larger size. The MP-Silica exhibited a maximum adsorption capacity of 91.9 mg AgNPs g−1 in the mixture. The adsorption of silver species on MP-Silica occurred through chemisorption via the coordination of these species with thiol groups on the surface. The removal of silver species from wastewater samples and consumer products by MP-Silica was demonstrated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Chemical Engineering - Volume 6, Issue 1, February 2018, Pages 596-603
نویسندگان
, ,