Remediation of atrazine-polluted soil using dielectric barrier discharge plasma and biochar sequential batch experimental technology
Remediation of atrazine-polluted soil using dielectric barrier discharge plasma and biochar sequential batch experimental technology
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DOI：
10.1016/j.cej.2023.141406
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发表时间：
2023-02
影响因子：
15.1
通讯作者：
Yinyin Zhang;Han Zhang;Ai Zhang;P. Héroux;Zhuyu Sun;Yanan Liu
中科院分区：
文献类型：
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作者：
Yinyin Zhang;Han Zhang;Ai Zhang;P. Héroux;Zhuyu Sun;Yanan Liu
采用介质阻挡放电(DBD)-生物炭序批式实验技术降解土壤中的阿特拉津(ATZ)。DBD处理后土壤颗粒的亲水性、颗粒大小和不稳定性增加，导致土壤中残留的ATZ暴露。同时，随后引入的生物炭弥补了单一DBD处理的缺点(例如，增加了土壤稀疏性和pH，改善了微生物的生存环境)。DBD处理10min和生物炭吸附30min后，空气中ATZ的去除效率达到66.1%，能量产率是单独DBD处理的4.2倍。确定ATZ降解过程中的功能活性物种为含氧活性物种。提出了ATZ的降解机理，包括脱烷基、脱氯-羟化、烷基-羟化、烷基-氧化、烯化和脱氨基-羟化反应。因此，这项研究证明了一种环境友好的技术，可以在不注射化学物质的情况下有效地降解ATZ，同时提高土壤的肥力。
Dielectric barrier discharge (DBD)-biochar sequential batch experimental technology was employed to degrade atrazine (ATZ) in soil. The hydrophilicity, particle size and instability of soil particles increased after DBD treatment, which contributed to the exposure of residual ATZ in the soil. Meanwhile, the subsequent introduction of biochar compensated for the shortcomings of sole DBD treatment (e.g. increased soil sparseness and pH, enhanced the living environment of microorganisms). The ATZ removal efficiency in air discharge reached 66.1 % after 10 min of DBD treatment and 30 min of biochar adsorption, and the energy yield was 4.2 times higher than that of sole DBD treatment. The functional active species in ATZ degradation were confirmed to be oxygen-containing reactive species. ATZ degradation mechanisms were proposed, including dealkylation, dechloro-hydroxylation, alkylic-hydroxylation, alkylic-oxidation, olefinization and deamino-hydroxylation reactions. Hence, the study demonstrated an environmentally friendly technology for effective ATZ degradation while improving the fertility of soil with no chemical injections.