title: Physicochemical characteristics of carbonaceous adsorbent for dioxin-like polychlorinated biphenyl adsorption.
abstract: It has been known that dioxin-like polychlorinated biphenyls (DL-PCBs) are present in almost all types of environments worldwide. Activated carbon treatment has been expected for the removal of DL-PCBs because it is a simple and low-cost removal technology. In the present study, the physicochemical properties of activated carbon were investigated to identify the characteristics of 16 different types of activated carbon on adsorption properties for DL-PCBs. To accomplish this, micropore volume, and pore diameter were calculated by t-plot analysis and the mesopore volume was analyzed by the Barrett-Joyner-Halenda (BJH) method. In addition, the Brunauer-Emmett-Teller (BET) surface area, pH, metal elements, and surface acid functional groups were analyzed. Then, adsorption experiments using DL-PCB in hexane solution were conducted, and the relationship between adsorption and physicochemical properties of activated carbon was investigated. The results showed that activated carbons having a surface area of 700-1200 m(2)g(-1) and micropores with diameters of about 0.7-0.8 nm exhibited high activity for the adsorption of PCBs. The results also clearly showed that the mesopore volume of activated carbon influenced the adsorption rate and the equilibrium adsorption.
authors: Environmental Science for Industry, Faculty of Agriculture, Ehime University, 3-5-7 Tarumi, Matsuyama, Ehime 790-8566, Japan. a-kawa@agr.ehime-u.ac.jp
authors: Ayato
authors: A
authors: Kawashima
authors: Misato
authors: M
authors: Katayama
authors: Noriko
authors: N
authors: Matsumoto
authors: Katsuhisa
authors: K
authors: Honda
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D004147:Dioxins / Q000737:chemistry*; D004785:Environmental Pollutants / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods*; D005395:Fish Oils / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008670:Metals / Q000737:chemistry; D011078:Polychlorinated Biphenyls / Q000737:chemistry*
chemical_list: D004147:Dioxins; D004785:Environmental Pollutants; D005395:Fish Oils; D008670:Metals; D002606:Charcoal; D011078:Polychlorinated Biphenyls