کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5209573 1503055 2016 22 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The synthesis and absorption dynamics of a lignin-based hydrogel for remediation of cationic dye-contaminated effluent
ترجمه فارسی عنوان
دینامیک سنتز و جذب یک هیدروژل بر پایه لیگنین برای تصفیه پساب آلاینده های رنگدانه کاتیونی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Lignosulfonate-g-acrylic acid (LS-g-AA) hydrogels that possess superabsorbent capacity were synthesized by grafting acrylic acid (AA) on the backbone of lignosulfonate (LS) in the presence of N,N′-methylene-bis-acrylamide (MBA) as initiated by laccase/t-BHP(tert-butyl hydroperoxide). Specifically, the carboxylic acid groups introduced by grafting acrylic acid, significantly enhanced the absorption capacity of LS-g-AA hydrogels. In this case, methylene blue (MB) was the representative dye substrate to study absorption dynamics. It was found that the equilibrium absorption of MB reached 2013 mg·g− 1 while pH, absorption time, and initial MB concentration affected the overall absorption capacity. The absorption isotherms and kinetics obeyed standard Freundlich and pseudo-2nd-order models, respectively. Furthermore, preliminary desorption experiments were conducted in weak acid solution and showed that ~ 50% of the original MB could be removed over one rinse cycle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 106, September 2016, Pages 137-142
نویسندگان
, , , , ,