PropS-SH/SiO2 nanocomposite coatings for pyrite oxidation inhibition to control acid mine drainage at the source
PropS-SH/SiO2 nanocomposite coatings for pyrite oxidation inhibition to control acid mine drainage at the source
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DOI：
10.1016/j.jhazmat.2017.05.043
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发表时间：
2017-09-15
影响因子：
13.6
通讯作者：
Xu, Yin
中科院分区：
文献类型：
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作者：
Liu, Yun;Hu, Xin;Xu, Yin
为了从源头控制矿山酸性水（AMD），本文介绍了一种新型的纳米复合涂层，该涂层以二氧化硅纳米填料包埋在γ -巯基丙基三甲氧基硅烷（PropS-SH）涂层中。通过电化学测试和化学浸出测试，考察了不同SiO2含量的PropS-SH/SiO2 （PSS）纳米复合涂层对黄铁矿氧化抑制性能。研究结果表明，适当的SiO2纳米颗粒的加入可以大大提高PropS-SH涂层的钝化效率。以3% （v/v）的PropS-SH溶液和2 wt%的SiO2纳米颗粒为包覆层，可使黄铁矿的氧化率降低81.1%（基于铁的释放）。此外，本文还介绍了PSS涂层在黄铁矿表面的涂层机理。(C) 2017 Elsevier B.V.版权所有
To control acid mine drainage (AMD) at the source, a novel nanocomposite coating, based on SiO2 nanoparticles as nanofiller embedded in gamma-mercaptopropyltrimethoxysilane (PropS-SH) coating is introduced in this paper. The performance of the PropS-SH/SiO2 (PSS) nanocomposite coatings with a different content of SiO2 nanoparticles on pyrite oxidation inhibition was evaluated by electrochemical measurements and chemical leaching testing. The results of the investigations revealed that the addition of appropriate SiO2 nanoparticles could greatly enhance the passivation efficiency of PropS-SH coating. The best coating was obtained from 3% (v/v) of PropS-SH solution with 2 wt% SiO2 nanoparticles as this coating decreased pyrite oxidation by 81.1% (based on Fe release). In addition, the coating mechanism of PSS coatings on pyrite surfaces is presented in this paper. (C) 2017 Elsevier B.V. All rights reserved.