کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5210266 1382883 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Adsorptive properties of sulfolignin-polyacrylamide graft copolymer for lead and uranium: Effect of hydroxilamine-hydrochloride treatment
ترجمه فارسی عنوان
خواص جذب کوپلیمر پیوند سولفولینین-پلی آکریل آمید برای سرب و اورانیوم: اثر درمان هیدروکسیلامین هیدروکلراید
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Sulfolignin-polyacrylamide graft copolymer (PAAm-SL) was synthesized and its adsorptive features were compared with those of PAAm and PAAm-SL modified to their hydroxamic acid and amidoxime forms for Pb2+ and UO22+ ions. The increase in adsorption with increasing pH inferred that the main adsorption mechanism could be complex formation between electron donor terminals of lignin and the metal ions via proton exchanger. The modification of PAAm-SL significantly increased the adsorption capacity for UO22+. The adsorption kinetics of both ions was well compatible to second-order model. The enthalpy and entropy changes were positive, and the negative Gibbs free energy change was the proof for the spontaneity of adsorption. Sulfolignin as a water soluble lignin derivative was reusable after its grafting on PAAm having inert feature for metal ion adsorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Reactive and Functional Polymers - Volume 73, Issue 1, January 2013, Pages 73-82
نویسندگان
, ,