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Effect of LDPE microplastics on chemical properties and microbial communities in soil

Soil Use and Management 2022 46 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Kumuduni Niroshika Palansooriya, Liang Shi, Binoy Sarkar, Binoy Sarkar, Liang Shi, Kumuduni Niroshika Palansooriya, Liang Shi, Binoy Sarkar, Kumuduni Niroshika Palansooriya, Kumuduni Niroshika Palansooriya, Kumuduni Niroshika Palansooriya, Liang Shi, Kumuduni Niroshika Palansooriya, Kumuduni Niroshika Palansooriya, Kumuduni Niroshika Palansooriya, Yong Sik Ok Liang Shi, Sang‐Ryong Lee, Yong Sik Ok Kumuduni Niroshika Palansooriya, Mee Kyung Sang, Mee Kyung Sang, Binoy Sarkar, Binoy Sarkar, Sang‐Ryong Lee, Binoy Sarkar, Yong Sik Ok Binoy Sarkar, Yong Sik Ok Kumuduni Niroshika Palansooriya, Kumuduni Niroshika Palansooriya, Binoy Sarkar, Binoy Sarkar, Mee Kyung Sang, Liang Shi, Yong Sik Ok Binoy Sarkar, Kumuduni Niroshika Palansooriya, Mee Kyung Sang, Binoy Sarkar, Binoy Sarkar, Binoy Sarkar, Binoy Sarkar, Sanjai J. Parikh, Yong Sik Ok Yong Sik Ok Mee Kyung Sang, Binoy Sarkar, Yong Sik Ok Kumuduni Niroshika Palansooriya, Yong Sik Ok Yong Sik Ok Yong Sik Ok Mee Kyung Sang, Mee Kyung Sang, Yong Sik Ok Yong Sik Ok Yong Sik Ok Binoy Sarkar, Sang‐Ryong Lee, Sang‐Ryong Lee, Binoy Sarkar, Sang‐Ryong Lee, Yong Sik Ok Yong Sik Ok Yong Sik Ok Binoy Sarkar, Yong Sik Ok Kumuduni Niroshika Palansooriya, Mee Kyung Sang, Mee Kyung Sang, Yong Sik Ok Binoy Sarkar, Yong Sik Ok Yong Sik Ok Yong Sik Ok Yong Sik Ok Yong Sik Ok Sang‐Ryong Lee, Yong Sik Ok Yong Sik Ok Sang‐Ryong Lee, Yong Sik Ok Yong Sik Ok Binoy Sarkar, Yong Sik Ok Yong Sik Ok Yong Sik Ok Yong Sik Ok Kumuduni Niroshika Palansooriya, Yong Sik Ok Yong Sik Ok Yong Sik Ok Yong Sik Ok Binoy Sarkar, Liang Shi, Yong Sik Ok Binoy Sarkar, Yong Sik Ok Yong Sik Ok Yong Sik Ok Yong Sik Ok Kumuduni Niroshika Palansooriya, Yong Sik Ok

Summary

Low-density polyethylene microplastics were added to soil at varying concentrations, revealing dose-dependent effects on soil chemical properties and shifts in microbial community composition. Higher LDPE concentrations altered soil pH, nutrient availability, and bacterial diversity, raising concerns about plastic impacts on soil ecosystem function.

Polymers

LDPE PE

Abstract The accumulation of plastics in the soil ecosystem poses an increasing environmental concern worldwide. However, little is known about the effect of plastic concentrations on soil properties and soil biota. In this study, we investigated the effect of low‐density polyethylene (LDPE) microplastics (MPs) on the chemical and microbial properties of agricultural soil using a set of microcosm experiments. The soil was incubated for 100 days with LDPE at concentrations of 0%, 0.1%, 1%, 3%, 5%, and 7% at 25°C with 70% water‐holding capacity. Along with soil chemical analysis, we conducted an analysis of soil microbial properties on the first day and again after 100 days of incubation. LDPE concentrations of ≥1% significantly ( p < .05) decreased the pH but increased the electrical conductivity of the soil in comparison with the control (0% LDPE at 100 days). Increasing the LDPE concentration did not affect the soil exchangeable cation content or the available Pb concentration. Firmicutes were the most abundant phyla in the soil on the first day, whereas Proteobacteria, Firmicutes and Actinobacteria became dominant in all treatments after 100 days. An increasing LDPE concentration increased the abundance of Actinobacteria and decreased Proteobacteria. Principal component analysis demonstrated that only 7% LDPE was positively correlated with Actinobacteria, indicating that higher concentrations of LDPE contributed to the growth of this phylum. The findings of this study imply that MP contamination could affect soil chemical properties and microbial activity and that these effects primarily depend on MP concentrations in soil.

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