Colloidal fraction on pomelo peel-derived biochar plays a dual role as electron shuttle and adsorbent in controlling arsenic transformation in anoxic paddy soil

Ruilin Zhong, Dandan Pan, Guoyong Huang, Guang Yang, Xiaonan Wang, Rumiao Niu, Xixi Cai, Ziman Ding, Wenting Chi, Ying Wang, Xiaomin Li