Removal of Trace Metals from Aqueous Solution by Fe(OH)3 Coprecipitation and Flotation Using Poly-Glutamic Acid
Le Thi Xuan Thuy, Le Phuoc Cuong, Tomoki Yabutani
International Research Journal of Pure and Applied Chemistry · pp. 797–804 · Published 30 Jul 2014
10.9734/IRJPAC/2014/10936Abstract
Iron hydroxide (Fe(OH)3) coprecipitation and an eco-friendly flotation technique by use of gamma poly-glutamic acid (γ-PGA) was developed for removal of heavy metals from water. Effects of PGA concentration and the flotating time on the flotation of Fe(OH)3 precipitate and removal efficiencies of metal ions was examined. The removal efficiency of heavy metals was estimated from measurements by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma atomic emission spectrometry (ICP-AES). The optimal conditions provided >80 % for Au, Bi, Cd, In, Ga, Mn, Os, Pb, Pt, Te, Sb, Sn, Rh, Ru, W and >60 % for Co, Ni, Se, Zn as the removal efficiency.
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