Cu adsorption in fixed bed column with three different influent concentration Huang-Mu Lo, Kae-Long Lin, Min-Hsin Liu, Hsung-Ying Chiu and Fang-Cheng Lo E3S Web Conf., 120 (2019) 03003 Published online: 27 September 2019 DOI: 10.1051/e3sconf/201912003003