Silicon-iron modified biochar remediates cadmium and arsenic co-contaminated paddy soil by regulating cadmium and arsenic speciation - Chen, Yao; Tian, Xin; Wang, Jia-hao; Zhang, Yu; Wang, Jie; Li, Zhang-tao; Zhao, Ke-li; Wu, Ji-zi (Frontiers in Microbiology, 2025)