Insight into the interactions between microplastics and heavy metals in agricultural soil solution: adsorption performance influenced by microplastic types
Yuliang Liao, Chun‐dan Gan, Xue Zhao, Xin-yue Du, Jin‐yan Yang
Abstract
) at elevated concentrations, indicating its greater potential for HM transport. Adsorption kinetics revealed that surface chemisorption and intraparticle diffusion were the key rate-limiting steps in the MP-Cd/Cr adsorption processes. Desorption of Cd was more pronounced than that of Cr, indicating higher activity of Cd on MP surfaces. Higher HM accumulation factors of aged MPs (Cd: 3.49-8.24%, Cr: 1.95-7.82%) suggest their potential to accumulate and immobilize soil HMs. The EMPs exhibited the highest accumulation factors, implying a greater impact of mixed MPs on soil total and bioavailable Cd/Cr concentrations than single-type MPs. These findings offer new insights into the interactions between pollutants in soils co-contaminated with mixed MPs and HMs.