Efﬁcient conversion of dimethylarsinate into arsenic and its simultaneous adsorption removal over FeCx/N-doped carbon ﬁber composite in an electro-Fenton process /Huachun Lan, Jianfei Li, Meng Sun, Xiaoqiang An, Chengzhi Hu, Ruiping Liu, Huijuan Liu, Jiuhui Qu * - Lan,Huachun