期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 7, 期 3, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2019.103097
关键词
Acid mine drainage; Coal mines; Iron nanoparticles; Sodium borohydride; Wastewater; Remediation
资金
- Environmental Nanoscience Research Group (ENS), University of the Western Cape, South Africa
In this study, the use of acid mine drainage as alternative source of ferric ion for the synthesis of iron nanoparticles was investigated. The physical and chemical characteristics of acid mine drainage from Navigation coal mine and the West Rand mine, South Africa were conducted. The synthesised iron nanoparticles were compared with iron nanoparticles prepared from commercial reagents by X-ray diffraction, X-ray fluorescence, scanning electron microscopy, high resolution transmission electron microscopy and Brunauer-Emmett-Teller surface area determination. The iron nanoparticles were utilised for the treatment of acid mine drainage. Experimental results showed that the characteristics of acid mine drainage samples differ from site to site due to the differences in their geological composition, chemical deposition, rate of oxidation, and availability of pyrite ores. The Toeseep acid mine drainage feedstock from Navigation coal mine was found to contain the highest concentration of iron (4219.14 mg L-1) thus; it was regarded to be a suitable source of iron, sulphate (21,317.79 mg L-1) was the predominant anion. The synthesised iron nanoparticles were crystalline and spherical in shape, with average particle size of 31.8 nm or 28.05 nm and Brunauer-Emmett-Teller surface area of 88 +/- 3.16m(2) g(-1) or 91 +/- 3.08 m(2) g(-1) for the iron nanoparticles synthesised from acid mine drainage or ferric chloride, respectively. The optimisation of the iron nanoparticles dosage and contact time for the treatment of Navigation Toeseep acid mine drainage was determined to be 0.1 g and 60 min, respectively. The toxic elements in the raw acid mine drainage were removed with over 75% efficiency.
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