Microwave Assisted Preparation of Thio-Functionalized Polyacrylonitrile Fiber for the Selective and Enhanced Adsorption of Mercury and Cadmium from Water 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
ACS Sustainable Chemistry & Engineering
年/卷/期
2017 / 5 / 7
页码
6054-6063
作者单位
State Key Laboratory of Urban Water Resource and Environment, Harbin 150090, PR China;State Key Laboratory of Urban Water Resource and Environment, Harbin 150090, PR China;State Key Laboratory of Urban Water Resource and Environment, Harbin 150090, PR China;State Key Laboratory of Urban Water Resource and Environment, Harbin 150090, PR China;
作者
Sheng Deng;Guangshan Zhang;Shuang Liang;Peng Wang;
摘要
<![CDATA[<img src="http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ascecg/2017/ascecg.2017.5.issue-7/acssuschemeng.7b00917/20170627/images/medium/sc-2017-00917v_0011.gif">In order to overcome the drawbacks of conventional heating for performing surface modification process, such as long synthesis time, low ef ciency, and adsorption capacity, we reported a novel approach by introducing a microwave (MW) assisted method to prepare a thio-functionalized fibrous adsorbent (PAN<sub>MW</sub>-Thio) for the enhanced and selective removal of Hg<sup>2+</sup> and Cd<sup>2+</sup> from water in this study. The properties and morphologies of the adsorbent prepared by the MW-assisted method and conventional heating were compared through FTIR, XRD, SEM characterization, and mechanical tests, and the results revealed that the MW assisted method is a satisfactory technology to enable a higher sulfur content and reinforced mechanical property for the adsorbent. The selective adsorption experiment indicated that PAN<sub>MW</sub>-Thio fibers possess higher affinity toward both Hg<sup>2+</sup> and Cd<sup>2+</sup> in the mixed solution with Pb<sup>2+</sup>, Cu<sup>2+</sup>, Ni<sup>2+</sup>, and Zn<sup>2+</sup>. The optimum pH value for the adsorption of Hg<sup>2+</sup> and Cd<sup>2+</sup> was found to be 7 with maximum adsorption capacities of 322.8 mg·g<sup>–1</sup> and 350.6 mg·g<sup>–1</sup>, respectively. The pseudo-second-order model and Langmuir model have revealed good fitness with the experimental data. The XPS analysis of the PAN<sub>MW</sub>-Thio fibers before and after metal adsorption demonstrated the chelation adsorption mechanism between metal ions and sulfur, and parts of the metals were believed to be converted to metallic sulfate or sulfides on the surface of the fibrous adsorbent. This fibrous adsorbent could still retain more than 80% of its original adsorption capacity when regenerated by HCl solution. The facile and rapid preparation protocol, high adsorption capacity and highly retained mechanical property of PAN<sub>MW</sub>-Thio indicates its possible application in selective removal of Hg<sup>2+</sup> and Cd<sup>2+</sup> ions from water.]]>
机翻摘要
暂无翻译结果,您可以尝试点击头部的翻译按钮。
关键词/主题词
Cd<sup>2+</sup>;Hg<sup>2+</sup>;Microwave assisted;Selective removal;Sulfur containing;
若您需要申请原文,请登录。

最新评论

暂无评论。

登录后可以发表评论

意见反馈
返回顶部