title: Adsorption characteristics of benzene on biosolid adsorbent and commercial activated carbons.
abstract: This study selected biosolids from a petrochemical waste-water treatment plant as the raw material. The sludge was immersed in 0.5-5 M of zinc chloride (ZnCl2) solutions and pyrolyzed at different temperatures and times. Results indicated that the 1-M ZnCl2-immersed biosolids pyrolyzed at 500 degrees C for 30 min could be reused and were optimal biosolid adsorbents for benzene adsorption. Pore volume distribution analysis indicated that the mesopore contributed more than the macropore and micropore in the biosolid adsorbent. The benzene adsorption capacity of the biosolid adsorbent was 65 and 55% of the G206 (granular-activated carbon) and BPL (coal-based activated carbon; Calgon, Carbon Corp.) activated carbons, respectively. Data from the adsorption and desorption cycles indicated that the benzene adsorption capacity of the biosolid adsorbent was insignificantly reduced compared with the first-run capacity of the adsorbent; therefore, the biosolid adsorbent could be reused as a commercial adsorbent, although its production cost is high.
authors.affiliation: Department of Risk Management, China Medical University, Taichung, Taiwan. hlchiang@mail.cmu.edu.tw
authors.forename: Hung-Lung
authors.initials: HL
authors.lastname: Chiang
authors.forename: Kuo-Hsiung
authors.initials: KH
authors.lastname: Lin
authors.forename: Chih-Yu
authors.initials: CY
authors.lastname: Chen
authors.forename: Ching-Guan
authors.initials: CG
authors.lastname: Choa
authors.forename: Ching-Shyung
authors.initials: CS
authors.lastname: Hwu
authors.forename: Nina
authors.initials: N
authors.lastname: Lai
mesh_terms: D000327:Adsorption; D001554:Benzene / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D007220:Industrial Waste; D010578:Petroleum; D016062:Porosity; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical; D018508:Water Purification / Q000379:methods*; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D002712:Chlorides; D007220:Industrial Waste; D010578:Petroleum; D012722:Sewage; D014874:Water Pollutants, Chemical; D017967:Zinc Compounds; D002244:Carbon; C016837:zinc chloride; D001554:Benzene