کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10602324 982374 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Removal of sulphate from aqueous solution using modified rice straw: Preparation, characterization and adsorption performance
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Removal of sulphate from aqueous solution using modified rice straw: Preparation, characterization and adsorption performance
چکیده انگلیسی
Rice straw as a lignocellulosic agricultural residue was chemically converted into a strong basic anion exchanger (RS-AE). Epoxy and amino groups were introduced into raw rice straw by reaction with epichlorohydrin and trimethylamine after it was treated in sodium hydroxide solution. The exchangers were characterized by element analysis, Fourier transform infrared (FT-IR) spectroscopy and scanning electron microscopy (SEM). The results showed that total exchanger capacity of rice straw was increased by 1.32 mEq/g, and quaternary amino groups were formed on its new fibrous surface after modification. Batch adsorption experiments suggested RS-AE exhibits a much higher sulphate maximum adsorption capacity (74.76 mg/g) in contrast to that of raw straw (11.68 mg/g). The equilibrium data were described by Langmuir and Freundlich isotherm models, respectively, and were found to agree very well with the former. RS-AE also showed a good performance in regeneration cycles and a high selectivity for sulphate ions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 85, Issue 3, 1 June 2011, Pages 571-577
نویسندگان
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