常规和可生物降解微塑料对土壤-蚯蚓-生菜系统中镉迁移的差异影响。

IF 6.2 1区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY

Journal of Agricultural and Food Chemistry Pub Date : 2025-09-24 DOI:10.1021/acs.jafc.5c08866

Li Chen,Nan Chang,Changchao Li,Tao Li,Tianyi Qiu,Qingliang Cui,Haoran He,Fengyu Huang,Haijian Bing,Jason C White,Linchuan Fang

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引用次数: 0

摘要

微塑料（MPs）和镉（Cd）是广泛存在的农业污染物，但MPs与Cd在农业生态系统中的相互作用尚不清楚。本研究通过微观实验研究了不同基质类型（包括常规基质（cmp）和可生物降解基质（BMPs））对土壤-蚯蚓-生菜体系中镉迁移的影响。高剂量（2%）CMPs显著提高植物芽和蚯蚓体内Cd浓度，分别提高54.1%和79.9%。然而，高剂量BMP暴露使茎部Cd浓度降低了30.3%。这可以通过CMP和BMP暴露后土壤性质、有效镉和微生物群落的显著变化来解释。代谢组学分析显示，在有机酸生物合成相关的代谢途径中，CMP组明显比BMP组富集，这可能增加了土壤Cd的有效性。我们的研究为了解MP暴露下食物链中Cd污染的潜在风险提供了重要的见解。

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Differential Impacts of Conventional and Biodegradable Microplastics on Cadmium Transfer in a Soil-Earthworm-Lettuce System.

Microplastics (MPs) and cadmium (Cd) are widespread agricultural contaminants, yet the interactions of MPs with Cd in agroecosystems are unknown. Here, we conducted a microcosm experiment to investigate the impacts of different MP types, including conventional (CMPs) and biodegradable MPs (BMPs), on the transfer of Cd in a soil-earthworm-lettuce system. The high dose (2%) of CMPs significantly increased the Cd concentration in plant shoots and earthworms by 54.1% and 79.9%, respectively. However, high-dose BMP exposure decreased the shoot Cd concentration by 30.3%. This could be explained by significant changes in soil properties, available Cd, and microbial communities after CMP and BMP exposure. Metabolomic analysis revealed that the CMP was significantly more enriched than the BMP group in metabolic pathways related to organic acid biosynthesis, which may increase soil Cd availability. Our study provides important insights for understanding the potential risk of Cd contamination of the food chain under MP exposure.

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来源期刊

Journal of Agricultural and Food Chemistry 农林科学-农业综合

CiteScore

9.90

自引率

8.20%

发文量

1375

审稿时长

2.3 months

期刊介绍： The Journal of Agricultural and Food Chemistry publishes high-quality, cutting edge original research representing complete studies and research advances dealing with the chemistry and biochemistry of agriculture and food. The Journal also encourages papers with chemistry and/or biochemistry as a major component combined with biological/sensory/nutritional/toxicological evaluation related to agriculture and/or food.