title: Alleviation of metal and BTEX inhibition on BTEX degradation using PVA-immobilized degrader: kinetic model of BTEX degradation.
abstract: Alleviation of metal inhibition on BTEX degradation using PVA-immobilized degrader (Mycobacterium sp. CHXY119) was investigated. When BTEX of 29 mg L(-1) [B:T:E:X = 1:1:1:1 (mg)] was used, more than 99 % of BTEX was simultaneously degraded by the free cells within 170 h. In contrast, BTEX of 114-172 mg L(-1) seriously inhibited degradation. High concentrations of metals (Mn(2+): 15, Ni(2+): 10, and Zn(2+): 10 mg L(-1)) also strongly inhibited BTEX degradation by the free cells at BTEX of 29 mg L(-1). Immobilization of degraders alleviated the inhibition of BTEX and heavy metals at high concentrations. A modified non-competitive inhibition model well described the BTEX degradation by the free and immobilized cells in the absence and presence of metal ions (R (2) = 0.92-0.99). The above results provide valuable information on treatment of metal-BTEX co-contaminated wastewater by the immobilized degrader.
authors.affiliation: Department of Safety, Health and Environmental Engineering, National Yunlin University of Science and Technology, 640, Yunlin, Taiwan, ROC.
authors.forename: Chi-Wen
authors.initials: CW
authors.lastname: Lin
authors.forename: Chih-Hung
authors.initials: CH
authors.lastname: Wu
authors.forename: Hui-Chu
authors.initials: HC
authors.lastname: Sun
authors.forename: Shih-Hsien
authors.initials: SH
authors.lastname: Chang
mesh_terms: D001673:Biodegradation, Environmental; D018914:Cells, Immobilized / Q000378:metabolism; D008670:Metals / Q000737:chemistry / Q000378:metabolism*; D009161:Mycobacterium / Q000378:metabolism*; D059392:Petroleum Pollution; D011142:Polyvinyl Alcohol / Q000737:chemistry*; D014877:Water Pollution, Chemical; D018508:Water Purification
chemical_list: D008670:Metals; D011142:Polyvinyl Alcohol