The effect of the active carbonyl groups and residual acid on the ammonia adsorption over the acid-modified activated carbon - Li, Changming; Zhao, Shuying; Li, Ming; Yao, Zhiliang; Li, Yang; Zhu, Chuanqiang; Xu, Si-Min; Li, Junjie; Yu, Jian (Frontiers in Environmental Science, 2023)