Converting copper slag and secondary aluminum dross into zeolite 13X, γ-/α-Fe2O3, iron-modified zeolite materials for chromium-containing wastewater treatment - Yang Ding; Xinjie Li; Yijian Cheng; Peng Li; Shuoyang Liang; Hongwei Guo; Bingji Yan; Dong Chen; Wei Zhao (Journal of Water Process Engineering, 2025)