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Meta-analysis of impacts of microplastics on plant heavy metal(loid) accumulation

Environmental Pollution 2024 61 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 80 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Fengyu Huang, Nan Chang, Fengyu Huang, Fengyu Huang, Shuling Zhao, Shuling Zhao, Fengyu Huang, Fengyu Huang, Fengyu Huang, Fengyu Huang, Fengyu Huang, Li Chen, Li Chen, Li Chen, Faqin Dong, Shuling Zhao, Tianyi Qiu, Nan Chang, Nan Chang, Nan Chang, Qingliang Cui, Shuling Zhao, Nan Chang, Nan Chang, Nan Chang, Na Wang, Tianyi Qiu, Tianyi Qiu, Fengyu Huang, Li Chen, Li Chen, Li Chen, Li Chen, Nan Chang, Tianyi Qiu, Tianyi Qiu, Fengyu Huang, Li Chen, Li Chen, Yi Zeng, Yi Zeng, Qingliang Cui, Qingliang Cui, Na Wang, Qingliang Cui, Linchuan Fang Li Chen, Fengyu Huang, Tianyi Qiu, Shuling Zhao, Tianyi Qiu, Shuling Zhao, Linchuan Fang Linchuan Fang Qingliang Cui, Tianyi Qiu, Li Chen, Fengyu Huang, Hansong Chen, Yi Zeng, Linchuan Fang Hansong Chen, Qingliang Cui, Hansong Chen, Hansong Chen, Shuling Zhao, Shuling Zhao, Hansong Chen, Hansong Chen, Tianyi Qiu, Fengyu Huang, Fengyu Huang, Yi Zeng, Linchuan Fang Linchuan Fang Hansong Chen, Yi Zeng, Nan Chang, Fengyu Huang, Linchuan Fang Linchuan Fang Tianyi Qiu, Hansong Chen, Fengyu Huang, Linchuan Fang Hansong Chen, Yi Zeng, Hansong Chen, Linchuan Fang Faqin Dong, Linchuan Fang Yi Zeng, Linchuan Fang Linchuan Fang Linchuan Fang Linchuan Fang Linchuan Fang Linchuan Fang Linchuan Fang Linchuan Fang Faqin Dong, Linchuan Fang

Summary

A meta-analysis of 3,226 observations found that microplastics promoted plant uptake of cadmium (11%), lead (30%), and copper (47.1%) in shoots, but decreased arsenic accumulation by 22.6%. Microplastics increased available soil concentrations of these metal cations while lowering soil pH, with machine learning revealing that soil pH and total heavy metal concentration are the primary drivers of plant metal accumulation.

Study Type Review

The co-occurrence of microplastics (MPs) and heavy metal(loid)s (HMs) has attracted growing scientific interest because of their wide distribution and environmental toxicity. Nevertheless, the interactions between MPs and HMs in soil-plant systems remain unclear. We conducted a meta-analysis with 3226 observations from 87 independent studies to quantify the impact of MPs addition on the plant biomass and HMS accumulation. Co-occurrence of MPs and HMs (except for As) induced synergistic toxicity to plant growth. MPs promoted their uptake in the shoot by 11.0% for Cd, 30.0% for Pb, and 47.1% for Cu, respectively. In contrast, MPs caused a significant decrease (22.6%, 17.9-26.9%) in the shoot As accumulation. The type and dose of MPs were correlated with the accumulation of HMs. MPs increased available concentrations of Cd, Pb, and Cu, but decreased available As concentration in soils. Meanwhile, MPs addition significantly lowered soil pH. These findings may provide explanations for MPs-mediated effects on influencing the accumulation of HMs in plants. Using a machine learning approach, we revealed that soil pH and total HMs concentration are the major contributors affecting their accumulation in shoot. Overall, our study indicated that MPs may increase the environmental risks of HMs in agroecosystems, especially metal cations.

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