%0 Journal Article
%T Application of magnetic particles modified with amino groups to adsorb copper ions in aqueous solution<br>
%A Yafen Lin
%A Huawei Chen
%A Kaelong Lin
%A Boryann Chen
%A Chyowsan Chiou
%A <br>
%J 环境科学学报(英文版)
%D 2011
%I 
%X A magnetic adsorbent can be easily recovered from treated water by magnetic force, without requiring further downstream treatment. In this research, amine-functionalized silica magnetite has been synthesized using N-3-(trimethoxysilyl)propyl]-ethylenediamine (TPED) as a surface modification agent. The synthesized magnetic amine adsorbents were used to adsorb copper ions in an aqueous solution in a batch system, and the maximum adsorption was found to occur at pH 5.5 0.1. The adsorption equilibrium data fitted the Langmuir isotherm equation reasonably well, with a maximum adsorption capacity of 10.41 mg/g. A pseudo second-order model could best describe the adsorption kinetics, and the derived activation energy was 26.92 kJ/mol. The optimum condition to desorb Cu2+ from NH2/SiO2/Fe3O4 was provided by a solution with 0.1 mol/L HNO3.
%K magnetic adsorbent
%K SiO2
%K amine
%K adsorb
%K copper ion<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=D0771F7DB42282C89DF20E45C87DB415&yid=9377ED8094509821&vid=EA389574707BDED3&iid=CA4FD0336C81A37A&sid=1AE5323881A5ECDC&eid=771152D1ADC1C0EB&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=1&reference_num=64