Cellulose Mediated Reduction and Immobilization of Cr(VI) in Chromite Ore Processing Residue
文献类型：期刊论文
| 作者 | Sun, Qianzhe; Liu, Feng ; Yuan, Yanjie; Liu, Weizhen; Zhang, Weifang; Zhang, Jing; Lin, Zhang
|
| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2020-07-15 |
| 卷号 | 394页码:1-8 |
| 关键词 | COPR Hydrothermal Cellulose LDHs Reduction and stabilization |
| ISSN号 | 0304-3894 |
| 英文摘要 | It is a great challenge to find an effective method for the treatment of chromite ore processing residue (COPR), due to the highly toxic and mobile characteristic of Cr(VI) in the sludge. This work reported a facile strategy to thoroughly reduce and immobilize Cr(VI) that was encapsulated in COPR by biomass-assistant hydrothermal treatment. After hydrothermal treatment at 160 degrees C for 180 min, the leaching of Cr(VI) in COPR decreased from 138.6 mg/L to 2.31 mg/L, well below the disposal standard limit (5 mg/L). It was found that in-situ produced volatile synthesis gas (H-2, CO and CH4) by cellulose under hydrothermal condition, was responsible for Cr(VI) reduction. The reduction kinetics were temperature-dependent and the rate constants increased from 7.8 x 10(-3) min(-1) at 120 degrees C to 77.9 x 10(-3) min(-1), at 180 degrees C. Further simulation experiments revealed that (i) Fe-hydrotalcite in COPR acted as the catalyst for the decomposition of cellulose, and (ii) cellulose can hydrothermally produce reductive gas with a high efficiency, where 0.1 g of cellulose can realize the reduction and immobilization of Cr (VI) equivalent to 14 g of COPR by 14 cycles of treatment. This study provided a promising strategy for one-step remediation of COPR by the coupled reduction-stabilization process. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/44865]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 推荐引用方式 GB/T 7714 | Sun, Qianzhe,Liu, Feng,Yuan, Yanjie,et al. Cellulose Mediated Reduction and Immobilization of Cr(VI) in Chromite Ore Processing Residue[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,394:1-8. |
| APA | Sun, Qianzhe.,Liu, Feng.,Yuan, Yanjie.,Liu, Weizhen.,Zhang, Weifang.,...&Lin, Zhang.(2020).Cellulose Mediated Reduction and Immobilization of Cr(VI) in Chromite Ore Processing Residue.JOURNAL OF HAZARDOUS MATERIALS,394,1-8. |
| MLA | Sun, Qianzhe,et al."Cellulose Mediated Reduction and Immobilization of Cr(VI) in Chromite Ore Processing Residue".JOURNAL OF HAZARDOUS MATERIALS 394(2020):1-8. |
入库方式： OAI收割
来源：生态环境研究中心
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