%0 Journal Article
%T Amino-functionalized core-shell magnetic mesoporous composite microspheres for Pb(II) and Cd(II) removal
%A Yulin Tang
%A Song Liang
%A Juntao Wang
%A Shuili Yu
%A Yilong Wang
%A <br>Yulin Tang
%A Song Liang
%A Juntao Wang
%A Shuili Yu
%A Yilong Wang
%J 环境科学学报(英文版)
%D 2013
%I 
%X Amino-functionalized Fe3O4@mesoporous SiO2 core-shell composite microspheres NH2-MS in created in multiple synthesis steps have been investigated for Pb(II) and Cd(II) adsorption. The microspheres were characterized by transmission electron microscope (TEM), scanning electron microscope (SEM), N2 adsorption-desorption, zeta potential measurements and vibrating sample magnetometer. Batch adsorption tests indicated that NH2-MS exhibited higher adsorption affinity toward Pb(II) and Cd(II) than MS did. The Langmuir model could fit the adsorption isotherm very well with maximum adsorption capacity of 128.21 and 51.81 mg/g for Pb(II) and Cd(II), respectively, implying that adsorption processes involved monolayer adsorption. Pb(II) and Cd(II) adsorption could be well described by the pseudo second-order kinetics model, and was found to be strongly dependent on pH and humic acid. The Pb(II)- and Cd(II)-loaded microspheres were effectively desorbed using 0.01 mol/L HCl or EDTA solution. NH2-MS have promise for use as adsorbents in the removal of Pb(II) and Cd(II) in wastewater treatment processes.
%K heavy metals
%K adsorption
%K magnetic mesoporous microspheres
%K amino-functionalization<br>heavy
%K metals
%K adsorption
%K magnetic
%K mesoporous
%K microspheres
%K amino-functionalization
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=22E81F320CE8640E5E3028D22FFC18EC&yid=FF7AA908D58E97FA&iid=E158A972A605785F&sid=CE16DE2ABCD4D365&eid=2C8B50BA95995EA2&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=28