Ferrihydrite decreases arsenic and cadmium bioaccessibility in microplastic-contaminated soils: Roles of iron speciation and surface charge transformation - Zelin Xu; Nan Yang; Peng Xiao; Qi Luo; Jingnan Ma; Wen Tian; Xiyan Jiang; Hanjun Zhu; Damao Xu; Xiaolin Cai; Naiyi Yin; Yanshan Cui (Journal of Environmental Chemical Engineering, 2026)