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微塑料对不同类型土壤中硫REDOX过程的影响:一种机制研究

Youming Dong¹, Minling Gao¹, Qiqi Cai¹

¹Department of Materials and Environmental Engineering, Shantou University, Shantou 515063, China.

Journal of hazardous materials

|January 14, 2024

概括

微塑料通过影响微生物群落和酶活性来改变土壤的硫循环. 这会对土壤产生影响.

科学领域:

环境科学环境科学
土壤科学土壤科学
微生物学微生物学

背景情况:

微塑料 (MP) 可以改变土壤特性和微生物群落.
这些变化可能会影响土壤硫减少氧化 (REDOX) 过程.
对于MP对土壤硫循环的影响机制尚未完全理解.

研究的目的:

调查聚钢 (PS) 和硫化聚烯 (PPS) 微塑料对土壤硫REDOX过程的影响.
阐明国会议员在不同类型的土壤中影响硫循环的机制.

主要方法:

用黑色,草原和米土壤进行土壤微观实验.
硫酸盐 (SO₄2-) 和硫化物 (S^2-) 度的评估.
对微生物群体活动 (硫二氧化酶,腺-5'-硫酸盐减少酶,硫酸盐减少酶) 和土壤酶结构的分析.

主要成果:

在不同土壤类型中,PS和PPS显著改变了SO2-和S2-水平.
MPs通过硫二氧化酶 (通过α-和γ-蛋白质细菌介导) 影响硫氧化,并通过腺-5'-硫酸盐减少酶和硫酸盐减少酶 (通过Desulfuromonadales和Desulfarculales介导) 减少.
土壤有机物影响了这些微生物过程,MP直接影响了土壤酶的结构和活性.

结论:

微塑料通过微生物和酶途径显著影响土壤硫REDOX过程.
了解这些机制对于评估MP对土壤健康和农业生产力的影响至关重要.
这些发现提供了对微塑料诱导的生物地球化学循环改变的见解.

关键词:

聚乙烯硫化物聚乙烯硫化物聚乙烯是一种聚乙烯.土壤酶土壤酶土壤微生物土壤微生物土壤有机物质土壤有机物质.

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