%0 Journal Article
%T Preparation and evaluation of Zr-β-FeOOH for efficient arsenic removal
%A Xiaofei Sun
%A Chun Hu
%A Jiuhui Qu
%J 环境科学学报(英文版)
%D 2013
%I 
%X A Zr-β-FeOOH adsorbent for both As(V) and As(III) removal was prepared by a chemical co-precipitation method. Compared with β-FeOOH, the addition of Zr enhanced the adsorption capacities for As(V) and As(III), especially As(III). The maximum adsorption capacities for As(III) and As(V) were 120 and 60 mg/g respectively at pH 7.0, much higher than for many reported adsorbents. The adsorption data accorded with Freundlich isotherms. At neutral pH, for As(V), adsorption equilibrium was approached after 3 hr, while for As(III), adsorption equilibrium was approached after 5 hr. Kinetic data fitted well to the pseudo second-order reaction model. As(V) elimination was favored at acidic pH, whereas the adsorption of As(III) by Zr-β-FeOOH was found to be effective over a wide pH range of 4-10. Competitive anions hindered the adsorption according to the sequence: phosphate > silicate > bicarbonate > sulfate > nitrate, while Ca2+ and Mg2+ increased the removal of As(III) and As(V) slightly. The high adsorption capability and good performance in other aspects make Zr-β-FeOOH a potentially attractive adsorbent for the removal of both As(III) and As(V) from water.
%K arsenic
%K adsorbent
%K adsorption
%K kinetic
%K Zr-β-FeOOH
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=22E81F320CE8640EF2DC90E1DB121B67&yid=FF7AA908D58E97FA&iid=E158A972A605785F&sid=07C52AC66061533A&eid=F7C11D7E3E8C5D3F&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=21