Release of chromium from Cr(III)- and Ni(II)-substituted goethite in presence of organic acids: Role of pH in the formation of colloids and complexes

Shengsheng Sun, Tenghaobo Deng, Ming Ao, Yijun Mo, Jingjing Li, Ting Liu, Wenjun Yang, Chao Jin, Rongliang Qiu, Yetao Tang