کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
581188 | 1453157 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evaluation of ammonium removal using a chitosan-g-poly (acrylic acid)/rectorite hydrogel composite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
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چکیده انگلیسی
This paper concerns the removal of ammonium ions (NH4+) from aqueous solution using a hydrogel composite chitosan grafted poly (acrylic acid)/rectorite prepared from in situ copolymerization. The effects of rectorite content, contact time, pH, NH4+ concentration and temperature on the adsorption capacity were discussed. Langmuir, Freundlich, Tempkin and Redlich-Peterson isotherms were used to describe the experimental data. The results indicate that the adsorption equilibrium can be achieved within 3-5Â min and, the hydrogel composite has a higher adsorption capacity for NH4+ in a wide pH levels ranged from 4.0 to 9.0. No significant changes in the adsorption capacity are found over the temperature range studied. The adsorption mechanism of NH4+ onto hydrogel composite was proposed, and the reusable ability of this hydrogel adsorbent was evaluated.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 171, Issues 1â3, 15 November 2009, Pages 671-677
Journal: Journal of Hazardous Materials - Volume 171, Issues 1â3, 15 November 2009, Pages 671-677
نویسندگان
Yian Zheng, Aiqin Wang,