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Tianhang Gu¹, Zhuobiao Ni², Qingqing Zhao³

¹School of Environmental Science and Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou 310018, China; State Key Laboratory for Pollution Control, School of Environmental Science and Engineering, Shanghai Institute of Pollution Control and Ecological Security, Tongji University, Shanghai 200092, China.

The Science of the total environment

|December 5, 2024

概括

纳米级零价值铁 (nZVI) 有效地降低了在米土壤中的二甲基酸盐 (DMAs(V),这是一种在大米中积累的关键物种. 这一战略通过降低大米谷中的含量来提高食品安全.

科学领域:

环境科学环境科学
土壤化学土壤化学
微生物学微生物学

背景情况:

由于的优先摄入,大米中的污染对食品安全构成重大风险.
二甲基酸盐 (DMAs(V)) 是一种普遍存在的物种,转移到米粒中,增加了饮食暴露.
在土中减轻DMAs是确保大米安全和产量至关重要的.

研究的目的:

研究纳米级零价值铁 (nZVI) 在污染的土中对DMAs的减轻效果.
分析nZVI应用对物种和微生物群落结构的影响.
阐明在田环境中由nZVI介导的减少背后的机制.

主要方法:

进行了28天的土壤水化实验,以监测物种.
应用了不同剂量的nZVI来评估它们对DMAs (V) 和无机化物 (iAs (III)) 度的影响.
使用元基因组测序来分析微生物硫酸盐减少和甲生成潜力的变化.

主要成果:

增加nZVI剂量显著降低了最大DMAs (V) 度从0.37到0.04μM,iAs (III) 度从1.39到0.23μM.
nZVI的应用改变了微生物群落结构,减少了硫酸盐减少细菌 (δ-蛋白质细菌) 和增加了甲基生物 (甲微生物).
这些微生物转移与抑制的DMAs (V) 形成和加速的DMAs (V) 转化相关.

结论:

nZVI证明了在土中有效地减轻DMAs,有效地控制了孔水中的积累.
该研究表明,nZVI通过同时抑制DMAs (V) 生产和促进其转化而起作用.
这些发现强调了nZVI作为保护大米生产免受污染的有希望的工具.

关键词:

甲基二甲基酸盐 (DMAs(V)) 是一种无机化物 (iAs(III)) 是一种无机化物.甲基生物生成 (Methanogenesis) 是一个过程.纳米级的零价值铁 (nZVI) 是一种减少硫酸盐的减少

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