A novel (NH4)2SO4-NaOH co-activation process converts coal gangue into an efficient silicon fertilizer with optimized release kinetics and modulated soil microbial impact - Xin Lv; Hao Zhang; Yue Gao; Zhenlei Cai; Jiushuai Deng; Minmin Liu; Jianying Deng; Chul B. Park; Liang Wang (Environmental Research, 2026)