title: [Effect of Decomposing Products of Immobilized Carriers on Desorption of Pyrene in Contaminated Soil].
abstract: Batch experiments were conducted to investigate the effect of soluble and insoluble decomposing products (decomposed for 1 day and 120 day; noted by DP1 and DP120, respectively) from immobilized carriers (corncob) on the desorption of pyrene in PAH-contaminated soil (120 d ageing, 20 mg x kg(-1)). It was found that (1) adding decomposing products of immobilized carriers could not only increase the rapidly desorbing fraction, but also improve the desorption rate of pyrene. The desorption rates of pyrene increased from 20% to 81.8% and 84.5% because of adding insoluble DP1 and DP120, and from 40% to 89.6% and 88.5% because of adding soluble DP1 and DP120. (2) The sorption amounts of pyrene by insoluble DP1 and.DP120 were 9. 4 and 16. 6 times higher than that by natural corncob, respectively. The sorption amounts of XAD-2 resins were increased by 1.5 and 3.1 times due to the added soluble DP1 and DP120, respectively. These results indicated that decomposing products of immobilized carries could improve the desorption of pyrene by sorption or activation in contaminated soil.
authors.forename: Dong-li
authors.initials: DL
authors.lastname: Tong
authors.forename: Sheng-qing
authors.initials: SQ
authors.lastname: Shuang
authors.forename: Xiao-jun
authors.initials: XJ
authors.lastname: Li
authors.forename: Wan-rong
authors.initials: WR
authors.lastname: Deng
authors.forename: Ran-ran
authors.initials: RR
authors.lastname: Zhao
authors.forename: Chun-yun
authors.initials: CY
authors.lastname: Jia
authors.forename: Zong-qiang
authors.initials: ZQ
authors.lastname: Gong
mesh_terms: D052918:Environmental Restoration and Remediation; D011721:Pyrenes / Q000032:analysis*; D012987:Soil; D012989:Soil Pollutants / Q000032:analysis*
chemical_list: D011721:Pyrenes; D012987:Soil; D012989:Soil Pollutants; C030984:pyrene