Selective Adsorption of Pb(II) from Aqueous Solution by Triethylenetetramine-Grafted Polyacrylamide/Vermiculite
Gu, SQ (Gu, Shiqing); Wang, L (Wang, Lan); Mao, XY (Mao, Xinyou); Yang, LP (Yang, Liping); Wang, CY (Wang, Chuanyi); Wang, L
2018
Source PublicationMATERIALS
ISSN1996-1944
Volume11Issue:4Pages:1-20
Abstract

Amine groups play significant roles in polymeric composites for heavy metals removal. However, generating a composite with a large number of functional and stable amine groups based on clay is still a challenge. In this work, a new amine-functionalized adsorbent based on acid-activated vermiculite (a-Verm) was prepared by organic modification of silane coupling agent as bridge, followed by in situ polymerization of acrylamide (AM) and further grafting of triethylene tetramine (TETA). The obtained polymeric composite g-PAM/OVerm was characterized by scanning electron microscope (SEM), energy dispersive spectrometer (EDS), Fourier transform infrared (FTIR), thermal analysis (TG/DTG), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET) analyses, confirming that amine groups were successfully grafted onto the surface of Verm. The efficacy g-PAM/OVerm for removing Pb(II) was tested. The adsorption equilibrium data on g-PAM/OVerm was in good accordance with the Langmuir adsorption isotherms, and the adsorption maximal value of Pb(II) was 219.4 mg.g(-1). The adsorption kinetic data fit the pseudo-second-order kinetic model well. Additionally, g-PAM/OVerm has better selectivity for Pb(II) ion in comparison with Zn(II), Cd(II) and Cu(II) ions. The present work shows that g-PAM/OVerm holds great potential for removing Pb(II) from wastewater, and provides a new and efficient method for the removal of heavy metal ions from industrial wastewater.

KeywordAmine Groups Amino-functionalized Vermiculite Adsorption Pb(Ii) Removal
DOI10.3390/ma11040514
Indexed BySCI
WOS IDWOS:000434710200056
Citation statistics
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5486
Collection中国科学院特殊环境功能材料与器件重点试验室
Corresponding AuthorWang, L
Affiliation1.Chinese Acad Sci, Lab Environm Sci & Technol, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Gu, SQ ,Wang, L ,Mao, XY ,et al. Selective Adsorption of Pb(II) from Aqueous Solution by Triethylenetetramine-Grafted Polyacrylamide/Vermiculite[J]. MATERIALS,2018,11(4):1-20.
APA Gu, SQ ,Wang, L ,Mao, XY ,Yang, LP ,Wang, CY ,&Wang, L.(2018).Selective Adsorption of Pb(II) from Aqueous Solution by Triethylenetetramine-Grafted Polyacrylamide/Vermiculite.MATERIALS,11(4),1-20.
MLA Gu, SQ ,et al."Selective Adsorption of Pb(II) from Aqueous Solution by Triethylenetetramine-Grafted Polyacrylamide/Vermiculite".MATERIALS 11.4(2018):1-20.
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