title: Influence of the pore structure and surface chemical properties of activated carbon on the adsorption of mercury from aqueous solutions.
abstract: Reactivation and chemical modification were used to obtain modified activated carbons with different pore structure and surface chemical properties. The samples were characterized by nitrogen absorption-desorption, Fourier transform infrared spectroscopy and the Bothem method. Using mercury chloride as the target pollutant, the Hg(2+) adsorption ability of samples was investigated. The results show that the Hg(2+) adsorption capacity of samples increased significantly with increases in micropores and acidic functional groups and that the adsorption process was exothermic. Different models and thermodynamic parameters were evaluated to establish the mechanisms. It was concluded that the adsorption occurred through a monolayer mechanism by a two-speed process involving both rapid adsorption and slow adsorption. The adsorption rate was determined by chemical reaction.
authors.affiliation: Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu Province, China; National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China; Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu Province, China; Key Lab. of Biomass Energy and Material, Nanjing 210042, Jiangsu Province, China.
authors.forename: Xincheng
authors.initials: X
authors.lastname: Lu
authors.affiliation: Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu Province, China; National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China; Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu Province, China; Key Lab. of Biomass Energy and Material, Nanjing 210042, Jiangsu Province, China. Electronic address: lhs_ac2011@aliyun.com.
authors.forename: Jianchun
authors.initials: J
authors.lastname: Jiang
authors.affiliation: Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu Province, China; National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China; Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu Province, China; Key Lab. of Biomass Energy and Material, Nanjing 210042, Jiangsu Province, China.
authors.forename: Kang
authors.initials: K
authors.lastname: Sun
authors.affiliation: Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu Province, China; National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China; Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu Province, China; Key Lab. of Biomass Energy and Material, Nanjing 210042, Jiangsu Province, China.
authors.forename: Jinbiao
authors.initials: J
authors.lastname: Wang
authors.affiliation: Institute of Chemical Industry of Forest Products, CAF, Nanjing 210042, Jiangsu Province, China; National Engineering Lab. for Biomass Chemical Utilization, Nanjing 210042, Jiangsu Province, China; Key and Open Lab. on Forest Chemical Engineering, SFA, Nanjing 210042, Jiangsu Province, China; Key Lab. of Biomass Energy and Material, Nanjing 210042, Jiangsu Province, China.
authors.forename: Yanping
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D008628:Mercury / Q000737:chemistry*; D008956:Models, Chemical; D016062:Porosity; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D014874:Water Pollutants, Chemical; D002606:Charcoal; D008628:Mercury
keywords: Activated carbon; Adsorption; Adsorption mechanism; Mercury; Pore structure; Surface functional groups