Guanidinium-functionalized magnetic mesoporous nanocomposite for efficient enrichment of trace highly polar pesticide in water - Xiaohan Meng; Jiale Yang; Gang Tang; Weiyao Yan; Xiaohong Zhang; Yuqi Huang; Jianhua Xiao; Qing Guo; Wenbing Zhang; Yongsong Cao (Journal of Hazardous Materials, 2026)