Effects of low-molecular-weight organic acids and manganese-modified biochar application sequences on the environmental risk of soil cadmium and arsenic - Yongqiang Yang; Mingjun Li; Yipan Zhao; Liping Li; Yale Wang; Weiqin Xing; Chunhong Xu; Qipo Yang; Yali Wang; Yu Liu (Environmental Geochemistry and Health, 2026)