Dual-site post-functionalization of hyper-crosslinked polymers with polyethyleneimine for ultrahigh and pH-resilient Cr(VI) removal - Fan Li; Zheng Zhu; Tian Tian; Ling Li; Shuangshuo Li; Jiaojiao Zhao; Chunfeng Wang; Yongjing Hao; Tao Chang (Journal of Environmental Chemical Engineering, 2025)