title: Enhanced treatment of coking wastewater containing phenol, pyridine, and quinoline by integration of an E-Fenton process into biological treatment.
abstract: In this study, the pyridine and quinoline could be cometabolically degraded by phenol-cultivated Comamonas sp. strain JB(strain JB). The integration of magnetically immobilized cells of JB and an E-Fenton process into one entity has been designed to prepare a novel integration system to improve the treatment efficiency of phenol, pyridine, and quinoline in coking wastewater. The optimal pH for the integration system was 3.5. Degradation rates of phenol, pyridine, quinoline, and COD by the integration system were significantly exceeded the sum degradation rates of the single E-Fenton process and magnetically immobilized cells at the optimal voltage of 1 V. During the 6 cycles, the integration system still showed higher degradation rates than that by the single magnetically immobilized cells for all the compounds. These findings demonstrated that a synergistic effect existed between the biological treatment and the E-Fenton process, and the applied voltage in the integration system played the key roles in the synergistic effect, which not only electrogenerated H2O2but also improved the activity of phenol hydroxylase and strain JB concentration.
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian, 116081, China.
authors.forename: Lanlan
authors.initials: L
authors.lastname: Xue
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian, 116081, China.
authors.forename: Jiaxin
authors.initials: J
authors.lastname: Liu
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian, 116081, China.
authors.forename: Meidi
authors.initials: M
authors.lastname: Li
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian, 116081, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Tan
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian, 116081, China.
authors.forename: Xiangyu
authors.initials: X
authors.lastname: Ji
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian, 116081, China. shishengnan013@163.com.
authors.forename: Shengnan
authors.initials: S
authors.lastname: Shi
authors.affiliation: School of Life Science, Liaoning Normal University, Dalian, 116081, China. Jiangbei1983@163.com.|Liaoning Key Lab of Marine Fishery Molecular Biology, Liaoning Ocean and Fisheries Science Research Institute, Dalian, 116023, China. Jiangbei1983@163.com.
authors.forename: Bei
authors.initials: B
authors.lastname: Jiang
mesh_terms: D003077:Coke; D006861:Hydrogen Peroxide; D019800:Phenol; D010636:Phenols / Q000737:chemistry; D011725:Pyridines; D011804:Quinolines; D062065:Wastewater / Q000737:chemistry*
chemical_list: D003077:Coke; D006861:Hydrogen Peroxide; D019800:Phenol; D010636:Phenols; D011725:Pyridines; D011804:Quinolines; D062065:Wastewater
keywords: Coking wastewater; Cometabolic degradation; E-Fenton process; Integration system; Magnetically immobilized cells