title: [Simulation study on reductive attenuation of nitrobenzene by Fe2+ in subsurface environment].
abstract: Experiments were conducted to investigate reductive attenuation of nitrobenzene (NB) by Fe2+ in subsurface environment and influences of hydrochemical constituents such as water hardness, SO4(21), NO3- and Cl-. Experimental results indicated that concentration of Fe2+ and NB both had influences on NB reduction. The highest reducing efficiency obtained while n(Fe2):n(NB) was 5.88:1 under the condition of pH 6.8 and 10 degrees C. The deoxidization efficiency of NB was up to 57.63% over 48 h. Mg2+ and CO3(2-) could inhibit the reduction of NB, and the reduction efficiency reached 51.05% and 49.96% in 48 h while Mg2+ was 150 mg/L and CO3(2-) was 50 mg/L, respectively; the inhibition was enhanced with increasing of Mg2+ and CO3(2-) concentration, and the deoxidization efficiency of NB was 6.98% only while Mg2+ was 800 mg/L. SO4(21), NO3- and Cl- have small influence on NB reduction, the deoxidization efficiency was less than 50% in 48 h. HCO3- can accelerate the reaction, and the reduction efficiency was up to 60% in 8h. These baseline relationships provide a way to quantitatively evaluate the extent of natural attenuation in contaminated site.
authors.affiliation: College of Environment and Resources, Jilin University, Changchun 130026, China. christie007@163.com
authors.forename: Meng
authors.initials: M
authors.lastname: Sun
authors.forename: Yong-sheng
authors.initials: YS
authors.lastname: Zhao
authors.forename: Jun
authors.initials: J
authors.lastname: Dong
authors.forename: Li-li
authors.initials: LL
authors.lastname: Dong
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
mesh_terms: D003198:Computer Simulation; D004785:Environmental Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D005296:Ferrous Compounds / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D009578:Nitrobenzenes / Q000737:chemistry / Q000302:isolation & purification*; D010084:Oxidation-Reduction
chemical_list: D004785:Environmental Pollutants; D005296:Ferrous Compounds; D009578:Nitrobenzenes; D007501:Iron; C036077:nitrobenzene