title: Enhanced carbon adsorption treatment for removing cyanide from coking plant effluent.
abstract: Batch experiments were conducted to determine the effects of metal loading and fixing methods on the capacity of granular activated carbon (GAC) for removing cyanide from KCN (pH 11), K(3)Fe(CN)(6) solutions and several SCP effluent samples. KI fixed carbon (Cu/KI-GAC) was the most effective among the GAC samples tested. Adsorption was the primary mechanism of cyanide removal; catalytic oxidation of the adsorbed cyanide on carbon surface contributed a minor amount of the observed removal. Four small adsorbers containing the base GAC and 0-100% of Cu/KI-GAC were employed for treating a Fenton oxidized/precipitated SCP effluent sample. After the start-up period (<3-week) to establish the effective biological activated carbon (BAC) function in the adsorbers, the effluents became stable and met the discharge limits (COD(Cr)<50mg/L and TCN<0.5mg/L); with >30% Cu/KI-GAC in the adsorber, the effluent would meet the discharge limits during the start-up phase.
authors.affiliation: School of Resources and Environmental Engineering, East China University of Science and Technology, No.130, Mei Long Road, Shanghai 200237, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.affiliation: School of Resources and Environmental Engineering, East China University of Science and Technology, No.130, Mei Long Road, Shanghai 200237, China.
authors.forename: Wandong
authors.initials: W
authors.lastname: Liu
authors.affiliation: School of Resources and Environmental Engineering, East China University of Science and Technology, No.130, Mei Long Road, Shanghai 200237, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Lv
authors.affiliation: School of Resources and Environmental Engineering, East China University of Science and Technology, No.130, Mei Long Road, Shanghai 200237, China.
authors.forename: Bingjing
authors.initials: B
authors.lastname: Li
authors.affiliation: School of Resources and Environmental Engineering, East China University of Science and Technology, No.130, Mei Long Road, Shanghai 200237, China. Electronic address: wcying@ecust.edu.cn.
authors.forename: Weichi
authors.initials: W
authors.lastname: Ying
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D003077:Coke; D003486:Cyanides / Q000302:isolation & purification*; D007220:Industrial Waste
chemical_list: D003077:Coke; D003486:Cyanides; D007220:Industrial Waste; D002244:Carbon