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Multifunctional N, Fe dual active site hydrothermal biochar for efficiently degrading paclobutrazol and promoting crop growth

文献类型： 外文期刊

作者： Zhu, Fangge 1 ; Chen, Yufeng 1 ; Ouyang, Jiewei 1 ; Wu, Fangfang 1 ; Ding, Chunxia 1 ; Mi, Baobin 2 ; Zhou, Zhonghua 1 ; Zhong, Mei-e 1 ;

作者机构： 1.Hunan Agr Univ, Coll Agron, Sch Chem & Mat Sci, Changsha 410128, Peoples R China

2.Hunan Acad Agr Sci, Res Inst Vegetables, Changsha 410125, Peoples R China

关键词： Peroxymonosulfate; Multifunctional biochar; Mechanism analysis; Soil remediation; Paclobutrazol; Plant growth

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.7； 五年影响因子：7.3 ）

ISSN： 2213-2929

年卷期： 2024 年 12 卷 3 期

页码：

收录情况： SCI

摘要： The development of a low-cost, highly catalytic, and soil fertility -improving biochar material is of significant importance for the sustained remediation of organic pollutants in the environment. In this study, multifunctional N, Fe dual active site biochar (NF -BC) was successfully synthesized by hydrothermal method using cotton straw, urea, and FeCl 3 as raw materials. Compared to the original biochar, NF -BC exhibits high graphitic -N content and abundant Fe 2 + , enabling efficient activation of Peroxymonosulfate (PMS) for the removal of Paclobutrazol (PBZ) in water and soil. EPR and quenching experiments confirm that the free radical pathway ( center dot OH) and the non -free radical pathway ( 1 O 2 ) act together in PBZ degradation. The DFT results illustrate the benzene and pyridine rings of PBZ are electron -rich regions, which can be attacked by reactive oxygen species. Then three possible degradation pathways are provided by combining them with the LC/MS test. After remediation by the NF-BC/PMS system, the soil fertility index and plant growth are significantly improved. Compared to CK, the pH value and SOM content of the soil remained unchanged after remediation with the NF-BC/PMS system, while the content of available K and hydrolyzed N increased by 27.18 and 2.27 times, respectively. The pot experiments showed that the NF-BC/PMS system not only alleviates the stress of PBZ on mung bean seedlings, but also promotes an increase in leaf area, accumulation of dry biomass, and root growth. This work provides a new idea for the preparation of low-cost and multifunctional biochar for the efficient removal of pesticides in soil and water environments.

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