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玉米秸秆生物炭改良退化土壤对镉的吸附。

Adsorption of Cadmium on Degraded Soils Amended with Maize-Stalk-Derived Biochar.

机构信息

Department of Environmental Engineering, School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China.

Low-cost Wastewater Treatment Technology International Sci-Tech Cooperation Base of Sichuan Province, Mianyang 621010, China.

出版信息

Int J Environ Res Public Health. 2018 Oct 23;15(11):2331. doi: 10.3390/ijerph15112331.

DOI:10.3390/ijerph15112331
PMID:30360479
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6266441/
Abstract

Biochar has been extensively proven to distinctively enhance the sorption capacity of both heavy metal and organic pollutants and reduce the related environmental risks. Soil pollution and degradation widely coexist, and the effect of biochar addition on adsorption behavior by degraded soils is not well understood. Four degraded soils with different degrees of degradation were amended with maize-stalk-derived biochar to investigate the adsorption of cadmium using batch methods. The maximum adsorption capacity () of degraded soil remarkably decreased in comparison with undegraded soil (5361 mg·kg→170 mg·kg), and the of biochar increased with increasing pyrolysis temperature (22987 mg·kg→49016 mg·kg) which was much higher than that of soil. The addition of biochar can effectively improve the cadmium adsorption capacity of degraded soil (36⁻328%). The improving effect is stronger when increasing either the degradation level or the amount of added biochar, or the pyrolysis temperature of biochar. Contrary to the general soil⁻biochar system, adsorption of Cd was not enhanced but slightly suppressed (7.1⁻36.6%) when biochar was incorporated with degraded soils, and the adsorptivity attenuation degree was found to be negatively linear with SOM content in the degraded soil⁻biochar system. The results of the present study suggest that more attention on the adsorption inhibition and acceleration effect difference between the soil⁻biochar system and the degraded soil⁻biochar system is needed.

摘要

生物炭已被广泛证明能显著提高重金属和有机污染物的吸附能力，并降低相关的环境风险。土壤污染和退化普遍共存，生物炭的添加对退化土壤吸附行为的影响还不太清楚。用批量法研究了添加玉米秸秆衍生生物炭对不同退化程度的四种退化土壤中镉的吸附作用。与未退化土壤相比，退化土壤的最大吸附量（）显著降低（5361 毫克/千克→170 毫克/千克），生物炭的（）随热解温度的升高而增加（22987 毫克/千克→49016 毫克/千克），远高于土壤的（）。生物炭的添加可以有效地提高退化土壤的镉吸附能力（36⁻328%）。随着退化程度或添加生物炭量或生物炭热解温度的增加，其改良效果增强。与一般的土壤-生物炭系统相反，当生物炭与退化土壤混合时，Cd 的吸附并没有增强，反而略有抑制（7.1⁻36.6%），在退化土壤-生物炭系统中，吸附性衰减程度与 SOM 含量呈负线性关系。本研究结果表明，需要更加关注土壤-生物炭系统和退化土壤-生物炭系统之间吸附抑制和加速效应的差异。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/e9f0c73c2dcf/ijerph-15-02331-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/8a3089250e49/ijerph-15-02331-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/0f8574502cb8/ijerph-15-02331-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/7450f8126dce/ijerph-15-02331-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/3ff71850a7f4/ijerph-15-02331-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/d3a65580444b/ijerph-15-02331-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/dcac4a9820ab/ijerph-15-02331-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/d1888485572f/ijerph-15-02331-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/38cdf8db53d4/ijerph-15-02331-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/cc0c51543141/ijerph-15-02331-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/9343b1b880c2/ijerph-15-02331-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/e9f0c73c2dcf/ijerph-15-02331-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/8a3089250e49/ijerph-15-02331-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/0f8574502cb8/ijerph-15-02331-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/7450f8126dce/ijerph-15-02331-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/3ff71850a7f4/ijerph-15-02331-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/d3a65580444b/ijerph-15-02331-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/dcac4a9820ab/ijerph-15-02331-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/d1888485572f/ijerph-15-02331-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/38cdf8db53d4/ijerph-15-02331-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/cc0c51543141/ijerph-15-02331-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/9343b1b880c2/ijerph-15-02331-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1725/6266441/e9f0c73c2dcf/ijerph-15-02331-g011.jpg

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