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[JOURNAL OF HAZARDOUS MATERIALS],卷: 362 页: 311-317
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作者: Qian, TT (Qian, Ting-Ting) ; Wu, P (Wu, Ping) ; Qin, QY (Qin, Qiu-Ying); Huang, YN (Huang, Ying-Nan) ; Wang, YJ (Wang, Yu-Jun) ; Zhou, DM (Zhou, Dong-Mei)

 

题目:Screening of wheat straw biochars for the remediation of soils polluted with Zn (II) and Cd (II)N

 

刊物:JOURNAL OF HAZARDOUS MATERIALS,卷: 362  页: 311-317

DOI: 10.1016/j.jhazmat.2018.09.034

出版年: JAN 15 2019

 

文章下载:https://ac.els-cdn.com/S030438941830829X/1-s2.0-S030438941830829X-main.pdf?_tid=c8169c4c-3d24-4f15-b6a5-97964b1057af&acdnat=1550471155_9185a008e56de8b371dd173eb62de977

 

摘要: 

The immobilization behaviors of Zn(II) and Cd(II) by wheat straw (WS) biochars could vary with the soil conditions. In the acidic environment, WS biochars produced at low temperature were more competent than those produced at high temperature on Zn(II) and Cd(II) immobilization; while WS biochars produced at high temperature were more effective than those produced at low temperature in the alkaline environment. The ions in the porewater could compromise the sorption capacities of Zn(II) and Cd(II) by WS biochars in acidic soils, while could enhance them in alkaline soils. For biochars produced at the same temperature, residence time had little effect on their behaviors of Zn(II) and Cd(II) immobilization. Only a small portion of immobilized Zn(II)/Cd(II) could be released from WS biochar in the simulated acid rain. Compared with Zn(II)/Cd(II) adsorbed on the acidic functional groups, Zn(II)/Cd(II) precipitates were more stable in 0.01 M CaCl2 solution. Most of the Zn(II) and Cd(II) species on biochar could be released in 1 mM citric acid solution. The immobilized Zn(II) and Cd(II) on WS biochar are likely to be released into the soil environment in the long run.

 

 

 

 

 

 

 

 

 

 


 

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