Citation: Liu Zhanglin, Tian Dong, Shen Fei, Long Lulu, Zhang Yanzong, Yang Gang, Zeng Yongmei, Zhang Jing, He Jinsong, Zhu Ying, Deng Shihuai. Elucidating dominant factors of PO₄^3-, Cd²⁺ and nitrobenzene removal by biochar: A comparative investigation based on distinguishable biochars[J]. Chinese Chemical Letters, ;2019, 30(12): 2221-2224. doi: 10.1016/j.cclet.2019.04.016 shu

Elucidating dominant factors of PO₄^3-, Cd²⁺ and nitrobenzene removal by biochar: A comparative investigation based on distinguishable biochars

Liu Zhanglin ^a,b ,
Tian Dong ^a ,
Shen Fei ^a,*, ,
Long Lulu ^a,b ,
Zhang Yanzong ^b ,
Yang Gang ^a,b ,
Zeng Yongmei ^a,b ,
Zhang Jing ^a,b ,
He Jinsong ^a,b ,
Zhu Ying ^a,b ,
Deng Shihuai ^a,b

a.
Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu 611130, China
b.
Rural Environment Protection Engineering & Technology Center of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China

fishensjtu@gmail.com

fishen@sicau.edu.cn

Received Date: 25 January 2019
Revised Date: 7 April 2019
Accepted Date: 8 April 2019
Available Online: 9 December 2019

Figures(2)

Biochars produced from crab shell (CSB), oak sawdust (OB), Jerusalem artichoke tuber (JAB) and sorghum grain (SB) displayed distinguishable adsorption-related characteristics, such as specific surface area (SSA), ash content and acidic oxygen-containing functional groups (AFGs), which linked to the biochar adsorption mechanisms of most pollutants. Herein, PO₄^3-, Cd²⁺, and nitrobenzene (NB) were employed for adsorption by these biochars to elucidate the dominant factors for the adsorption. Adsorption performance of the three pollutants onto these four biochars varied considerably, as exemplified by the excellent adsorption of PO₄^3- and Cd²⁺ onto CSB (225.3 and 116.0 mg/g, respectively) as compared with onto the other three biochars (4.2-37.1 mg/g for PO₄^3- and 9.7-41.0 mg/g for Cd²⁺). OB displayed the best adsorption of NB (72.0 mg/g), followed by SB (39.5 mg/g), JAB (31.1 mg/g), and CSB (23.6 mg/g). The kinetics and isotherm adsorption assessments couple with material characterization suggested that the sorption of selected pollutants on biochars was attributed to the multiple mechanisms involved, including coprecipitation, chemical bonds, cation exchange, physical absorption, and complexation. Further path analysis suggested that AFGs and ash content in biochars were more important than SSA with regards to pollutant removal, especially, with ash playing a crucial role in the removal of Cd²⁺ and PO₄^3-, and AFGs being mainly responsible for NB adsorption. These findings might offer guidance on the preparation or modification of biochar with a targeted function for pollutant removal through an understanding the dominant factors.
- Biochars,
- Adsorption,
- Typical pollutants,
- Dominant factors,
- Path analysis
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沈阳化工大学材料科学与工程学院沈阳 110142

Elucidating dominant factors of PO43-, Cd2+ and nitrobenzene removal by biochar: A comparative investigation based on distinguishable biochars

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通讯作者: 陈斌, bchen63@163.com

Elucidating dominant factors of PO₄^3-, Cd²⁺ and nitrobenzene removal by biochar: A comparative investigation based on distinguishable biochars