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题名: Pyrolysis Treatment of Chromite Ore Processing Residue by Biomass: Cellulose Pyrolysis and Cr(VI) Reduction Behavior
作者: Zhang, Da-Lei; Zhang, Mei-Yi; Zhang, Chu-Hui; Sun, Ying-Jie; Sun, Xiao; Yuan, Xian-Zheng
刊名: ENVIRONMENTAL SCIENCE & TECHNOLOGY
出版日期: 2016-03-15
卷号: 50, 期号:6, 页码:3111-3118
DOI: 10.1021/acs.est.5b05707
部门归属: 环境纳米材料实验室
英文摘要: The pyrolysis treatment with biomass is a promising technology for the remediation of chromite-ore-processing, residue (COPR). However, the mechanism of this process is Still unclear. In this study, the behavior of pyrolysis reduction of Cr(VI) by cellulose, the main component of biomass, was elucidated. The results showed that the volatile fraction (VIE) of cellulose, ie. gas and tar, was responsible for Cr(VI) reduction. All organic compounds, as well as CO and H-2 in VF, potentially reduced Cr(VI). X-ray absorption near edge structure (XANES) spectroscopy and extended X-ray absorption fine-structure (EXAFS) spectroscopy confirmed the reduction of Cr(VI) to Cr(III) and the formation of amorphous Cr2O3. The remnant Cr(VI) content in COPR can be reduced below the detection limit (2 mg/kg) by the reduction of COPR particle and extension of reaction time between VF and COPR. This study provided a deep insight on the co-pyrolysis of cellulose with Cr(VI) in COPR and an ideal approach by which to characterize and optimize the pyrolysis treatment for COPR by other organics.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/36000
Appears in Collections:环境纳米材料实验室_期刊论文

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Recommended Citation:
Zhang, Da-Lei,Zhang, Mei-Yi,Zhang, Chu-Hui,et al. Pyrolysis Treatment of Chromite Ore Processing Residue by Biomass: Cellulose Pyrolysis and Cr(VI) Reduction Behavior[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016,50(6):3111-3118.
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