Investigation of the adsorption-reduction mechanisms of hexavalent chromium by ramie biochars of different pyrolytic temperatures

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成果类型：

期刊论文

作者：

Zhou, Lu;Liu, Yunguo*;Liu, Shaobo;Yin, Yicheng;Zeng, Guangming;...

通讯作者：

Liu, Yunguo

作者机构：

[Zhou, Lu; Liu, Yunguo; Zeng, Guangming; Jiang, Luhua; Tan, Xiaofei; Hu, Xinjiang; Yin, Yicheng; Liu, Shaoheng; Ding, Yang; Huang, Xixian] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.

[Zhou, Lu; Liu, Yunguo; Zeng, Guangming; Jiang, Luhua; Tan, Xiaofei; Hu, Xinjiang; Yin, Yicheng; Liu, Shaoheng; Ding, Yang; Huang, Xixian] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.

[Liu, Shaobo] Cent S Univ, Coll Architecture & Art, Changsha 410082, Hunan, Peoples R China.

[Hu, Xi] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn Res, Changsha 410004, Hunan, Peoples R China.

通讯机构：

[Liu, Yunguo] H

Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.

语种：

英文

关键词：

Biochar;Chromium;Mechanisms;Pyrolysis temperature;Ramie residues

期刊：

Bioresource Technology

ISSN：

0960-8524

年：

2016

卷：

218

页码：

351-359

DOI：

10.1016/j.biortech.2016.06.102

基金类别：

National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [41271332]; Natural Science Foundation of Guangdong Province, ChinaNational Natural Science Foundation of Guangdong Province [2016A030310246]

机构署名：

本校为其他机构

院系归属：

环境科学与工程学院

摘要：

To investigate the relationship between Cr(VI) adsorption mechanisms and physio-chemical properties of biochar, ramie residues were oxygen-limited pyrolyzed under temperature varying from 300 to 600 °C. Batch adsorption experiments indicated that higher pyrolysis temperature limits Cr(VI) sorption in terms of capacity and affinity due to a higher aromatic structure and fewer polar functional groups in biochar. Both electrostatic (physical) and ionic (chemical) interactions were involved in the Cr(VI) removal. For low-temperature biochar, the s...

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Investigation of the adsorption-reduction mechanisms of hexavalent chromium by ramie biochars of different pyrolytic temperatures

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