title: Adsorption of Pyrene onto the Agricultural By-Product: Corncob.
abstract: The adsorption behavior of pyrene on corncob was studied to provide a theoretical basis for the possible use of this material as an immobilized carrier for improving the bioremediation of PAH-contaminated soil. The results were as follows. Kinetic experiments showed that the adsorption processes obeyed a pseudo-second-order model. The intraparticle diffusion of Weber-Morris model fitting showed that the film and intraparticle diffusions were the key rate-limiting processes, and the adsorption process mainly consisted of three steps: boundary layer diffusion and two intra-particle diffusions. Experimental adsorption data for pyrene were successfully described by the adsorption-partition equilibrium model. The maximum adsorption capacity at 25°C was 214.8 μg g(-1). The adsorption contribution decreased significantly when the Ce/Sw (the equilibrium concentration/solubility in water) was higher than 1. Adsorption decreased with increased temperature. Based on the above results, the corncob particles could be helpful in the bioremediation of pyrene-contaminated soil.
authors.affiliation: Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China. lixiaojun@iae.ac.cn.
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Li
authors.affiliation: Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.|University of Chinese Academy of Sciences, Beijing, 100049, China.
authors.forename: Dongli
authors.initials: D
authors.lastname: Tong
authors.affiliation: Centre for Environmental Sustainability and Remediation (EnSuRe), RMIT University, Melbourne, VIC, 3001, Australia.|Australia-China Joint Research Centre on River Basin Management (Water Resources and Water Quality), University of Melbourne, Melbourne, VIC, Australia.
authors.forename: Graeme
authors.initials: G
authors.lastname: Allinson
authors.affiliation: Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China. jiachunyun@126.com.
authors.forename: Chunyun
authors.initials: C
authors.lastname: Jia
authors.affiliation: Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.
authors.forename: Zongqing
authors.initials: Z
authors.lastname: Gong
authors.affiliation: Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.
authors.forename: Wan
authors.initials: W
authors.lastname: Liu
mesh_terms: D000327:Adsorption; D000383:Agriculture; D004058:Diffusion; D007700:Kinetics; D011721:Pyrenes / Q000737:chemistry / Q000302:isolation & purification*; D012989:Soil Pollutants / Q000737:chemistry / Q000302:isolation & purification; D012995:Solubility; D014867:Water; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D011721:Pyrenes; D012989:Soil Pollutants; D014874:Water Pollutants, Chemical; D014867:Water; C030984:pyrene
keywords: Adsorption; Corncob; Diffusion; Model; Pyrene