High dispersions of nano zero valent iron supported on biochar by one-step carbothermal synthesis and its application in chromate removal
文献类型：期刊论文
| 作者 | Li, Shifeng1,2; You, Tingting1; Guo, Yang1; Yao, Shuhua1; Zang, Shuyan1; Xiao, Min3; Zhang, Zhigang4; Shen, Yanming4 |
| 刊名 | RSC ADVANCES
 |
| 出版日期 | 2019 |
| 卷号 | 9期号:22页码:12428-12435 |
| ISSN号 | 2046-2069 |
| DOI | 10.1039/c9ra00304e |
| 英文摘要 | A one-step carbothermal synthesis and characterization of biochar-supported nanoscale zero-valent iron (nZVI/BC) was performed for the removal of hexavalent chromium (Cr(vi)) from aqueous solution. High dispersions of nanoscale zero-valent iron supported on biochar were successfully synthesized by the pyrolysis of an iron-impregnated biomass (corn stover) as the carbon and iron source under nitrogen atmosphere. The effects of the pyrolytic temperature on the Fe mineralogies formed on the biochar are discussed. In general, the effects of the treatment time, initial solution pH, and nZVI/BC dosage on the Cr(vi) removal are presented. The results showed high crystallinity and purity, and nZVI/BC was obtained at a pyrolytic temperature of 800 degrees C. The batch experimental results determined that the adsorption capacity of Cr(vi) decreases with the increase in the initial pH value from 4.0 to 10.0. The Cr(vi) adsorption kinetics data effectively followed a pseudo-second-order kinetics with a calculated rate constant of 0.0.3396 g mg(-1) min(-1). The calculated thermodynamic parameters, such as G degrees, H degrees, and S degrees, were evaluated, and the results indicated that the Cr(vi) reduction on nZVI/BC was a spontaneous and endothermic process. The adsorption mechanism of Cr(vi) was investigated by XRD and XPS analyses and the results demonstrated that Cr(vi) was reduced to Cr(iii) and the oxidation of nZVI occurred during the reaction process. These results prove that nZVI/BC synthesized by a one-step carbothermal method can be considered as a potential candidate for the removal of Cr(vi) from aqueous solutions. |
| 资助项目 | National Key R&D Program of China[2017YFD0800301] ; Science and Technology Program of Shenyang[18-013-0-28] ; General Project of Liaoning Provincial Department of Education[LQ2017012] ; Natural Science Foundation of Liaoning Province[20170540727] ; opening fund of Key Laboratory of Original Agro-Environmental Pollution Prevention and Control, Ministry of Agriculture/Tianjin Key Laboratory of Agro-environment and Safe-product[18nybcdhj-7] |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000466758200030 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://210.72.129.5/handle/321005/124061]  |
| 专题 | 中国科学院沈阳应用生态研究所 |
| 通讯作者 | Li, Shifeng; Zang, Shuyan |
| 作者单位 | 1.Shenyang Univ Chem Technol, Liaoning Engn Res Ctr Treatment & Recycling Ind D, Shenyang 110142, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Key Lab Pollut Ecol & Environm Engn, Shenyang 110016, Liaoning, Peoples R China 3.Shenyang Univ, Minist Educ, Sch Environm, Key Lab Reg Environm & Ecoremediat, Shenyang 110044, Liaoning, Peoples R China 4.Shenyang Univ Chem Technol, Liaoning Prov Key Lab Chem Separat Technol, Shenyang 110142, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shifeng,You, Tingting,Guo, Yang,et al. High dispersions of nano zero valent iron supported on biochar by one-step carbothermal synthesis and its application in chromate removal[J]. RSC ADVANCES,2019,9(22):12428-12435. |
| APA | Li, Shifeng.,You, Tingting.,Guo, Yang.,Yao, Shuhua.,Zang, Shuyan.,...&Shen, Yanming.(2019).High dispersions of nano zero valent iron supported on biochar by one-step carbothermal synthesis and its application in chromate removal.RSC ADVANCES,9(22),12428-12435. |
| MLA | Li, Shifeng,et al."High dispersions of nano zero valent iron supported on biochar by one-step carbothermal synthesis and its application in chromate removal".RSC ADVANCES 9.22(2019):12428-12435. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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