کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4486605 1316994 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Removal of some divalent cations from water by membrane-filtration assisted with alginate
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Removal of some divalent cations from water by membrane-filtration assisted with alginate
چکیده انگلیسی

The removal of divalent metal ions from hard waters or galvanic wastewater by polymer-assisted membrane filtration using alginate was investigated. The ability of this natural polymer to form aggregates and gels in presence of metal ions was studied, in order to carry out metal removal by ultra or micro-filtration. Alginate titrations have shown the presence of amine groups in addition to carboxylates onto the polymer backbone. The binding properties of alginate with divalent cations have been studied, showing an increasing affinity for Ca2+ over Mg2+ as polymer concentration increases, and the relative affinity Pb2+⩾Cu2+>Zn2+>Ni2+. The softening of hard natural waters was achieved successfully and easily, but needs an optimal alginate concentration ∼4×10−2 M. The alginate powder can be directly added to hard waters. Except for Ni2+, metal-removal was efficient. Polymer regeneration has shown that Cu2+-complexes are labiles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 40, Issue 6, March 2006, Pages 1303–1309
نویسندگان
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