期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 3, 页码 1133-1144出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ta09784g
关键词
-
资金
- National Natural Science Foundation of China [21274052, 51303060, 21474043]
Cr(VI) is a well-known highly toxic metal ion and a thorough cleanup of this pollutant in wastewater is of special concern. Herein, a novel branched polyethylenimine (bPEI) grafted electrospun polyacrylonitrile (PAN) fiber membrane for Cr(VI) remediation based on adsorption was synthesized by a facile refluxing approach. Benefiting from the electrospinning process, the diameter of PAN fibers could be decreased to hundreds of nanometers from more than ten micrometers, which led to a higher adsorption capacity toward Cr(VI). In addition, the electrospun fibers showed good membrane forming properties, guaranteeing their application in the filtration purification process. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), elemental analysis, contact angle and so forth were used to characterize the grafted fiber membranes. Different grafting ratios were achieved by varying the refluxing time to search for the optimized removal capacity toward Cr(VI). The adsorption properties of the grafted fiber membrane including batch adsorption and filtration adsorption were investigated. The results revealed that the bPEI grafted electrospun PAN fiber adsorbent possessed an excellent adsorption capacity toward Cr(VI) (q(m) = 637.46 mg g(-1)), which was higher than many other adsorbents. Moreover, the batch adsorption and dynamic filtration could also make the Cr(VI) concentration notably decrease from 10 or 5 mg L-1 to below 0.05 mg L-1, which is recommended as the drinking water standard by WHO. The obtained results suggested that the grafted electrospun fiber membrane could be potentially applied to the efficient removal of Cr(VI) in wastewater treatment.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据