title: Reductive transformation of p-nitrotoluene by a new iron-fly ash packing.
abstract: A new iron-fly ash packing was studied for reductive transformation of p-nitrotoluene. The packing was made of iron, fly ash and kaolin with the mass ratio of 36:7:2. A reactor was designed to investigate the long-term performance of the packing. The results showed that the reduction of p-nitrotoluene increased with decreasing pH, because the reduction potential of reaction increased with the concentration of H(+). The pH was one of the key factors impacting the reductive transformation of p-nitrotoluene. Comparing iron-activated carbon packing with the new iron-fly ash packing, the reduction efficiencies were respectively 76.61% and 75.36% after 20days. The reduction efficiency for both was around 50% at 40days. It was evident that these two kinds of packing had no significant difference in their capability for p-nitrotoluene reductive transformation. Compared with iron-activated carbon, the new iron-fly ash packing had obvious advantages in terms of manufacturing costs and environmental pollution degradation. This study showed that the new iron-fly ash packing had good performance in reductive transformation of nitrotoluene compounds.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China. Electronic address: yubaizhen0902@163.com.
authors.forename: Baizhen
authors.initials: B
authors.lastname: Yu
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China. Electronic address: jruofei@dlut.educn.
authors.forename: Ruofei
authors.initials: R
authors.lastname: Jin
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Guangfei
authors.initials: G
authors.lastname: Liu
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Jiti
authors.initials: J
authors.lastname: Zhou
mesh_terms: D060729:Coal Ash / Q000737:chemistry*; D004785:Environmental Pollutants / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D007616:Kaolin / Q000737:chemistry; D007700:Kinetics; D010084:Oxidation-Reduction; D014050:Toluene / Q000031:analogs & derivatives* / Q000737:chemistry
chemical_list: D060729:Coal Ash; D004785:Environmental Pollutants; D007616:Kaolin; D014050:Toluene; D007501:Iron; C017572:4-nitrotoluene
keywords: New iron-fly ash packing; Reactor; Reductive transformation; p-Nitrotoluene