کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10139762 1645979 2018 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Treatment of wastewater containing Cu2+ using a novel macromolecular heavy metal chelating flocculant xanthated chitosan
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
Treatment of wastewater containing Cu2+ using a novel macromolecular heavy metal chelating flocculant xanthated chitosan
چکیده انگلیسی
A novel macromolecular heavy metal chelating flocculant, xanthated chitosan (XCTS), was prepared by reacting chitosan with benzaldehyde, NaOH and CS2. In a series of experiments, the flocculation performance of XCTS was evaluated by testing the removal rate of Cu2+ and/or turbidity. Factors that could affect the process such as pH, initial Cu2+ concentration, co-existing organic complexing agents and turbidity were studied. The results showed that XCTS could remove both Cu2+ and turbidity from wastewater with a removal rate of Cu2+ exceeding 97%. When water samples contained Cu2+ and turbidity-causing substance, the removal rate of Cu2+ and turbidity would be both promoted by a cooperative effect from both materials. At pH 2.0-8.0, the removal rate of Cu2+ increased with the pH. However, the removal rate of Cu2+ reached 92.4% at pH 6.0, indicated that XCTS also had a good effect on copper removal in acidic media. Fourier transform infrared spectroscopy analysis revealed that the dithiocarboxy group on XCTS reacted with Cu2+.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 558, 5 December 2018, Pages 384-391
نویسندگان
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