title: Modeling the Kinetics of Contaminants Oxidation and the Generation of Manganese(III) in the Permanganate/Bisulfite Process.
abstract: Permanganate can be activated by bisulfite to generate soluble Mn(III) (noncomplexed with ligands other than H2O and OH(-)) which oxidizes organic contaminants at extraordinarily high rates. However, the generation of Mn(III) in the permanganate/bisulfite (PM/BS) process and the reactivity of Mn(III) toward emerging contaminants have never been quantified. In this work, Mn(III) generated in the PM/BS process was shown to absorb at 230-290 nm for the first time and disproportionated more easily at higher pH, and thus, the utilization rate of Mn(III) for decomposing organic contaminant was low under alkaline conditions. A Mn(III) generation and utilization model was developed to get the second-order reaction rate parameters of benzene oxidation by soluble Mn(III), and then, benzene was chosen as the reference probe to build a competition kinetics method, which was employed to obtain the second-order rate constants of organic contaminants oxidation by soluble Mn(III). The results revealed that the second-order rate constants of aniline and bisphenol A oxidation by soluble Mn(III) were in the range of 10(5)-10(6) M(-1) s(-1). With the presence of soluble Mn(III) at micromolar concentration, contaminants could be oxidized with the observed rates several orders of magnitude higher than those by common oxidation processes, implying the great potential application of the PM/BS process in water and wastewater treatment.
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Tongji University , Shanghai 20092, P. R. China.|State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology , Harbin, Heilongjiang 150090, P. R. China.
authors.forename: Bo
authors.initials: B
authors.lastname: Sun
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Tongji University , Shanghai 20092, P. R. China.
authors.forename: Hongyu
authors.initials: H
authors.lastname: Dong
authors.affiliation: School of Civil and Environmental Engineering, University of New South Wales , Sydney, New South Wales 2052, Australia.
authors.forename: Di
authors.initials: D
authors.lastname: He
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Tongji University , Shanghai 20092, P. R. China.
authors.forename: Dandan
authors.initials: D
authors.lastname: Rao
authors.affiliation: State Key Laboratory of Pollution Control and Resources Reuse, Tongji University , Shanghai 20092, P. R. China.|Key Laboratory of Yangtze River Water Environment, Ministry of Education, College of Environment Science and Engineering, Tongji University , Shanghai 200092, P. R. China.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Guan
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry; D001559:Benzhydryl Compounds / Q000737:chemistry; D007700:Kinetics; D008345:Manganese / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D013447:Sulfites / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D000098826:Bisphenol A Compounds
chemical_list: D000814:Aniline Compounds; D001559:Benzhydryl Compounds; D008345:Manganese; D017895:Manganese Compounds; D010087:Oxides; D010636:Phenols; D013447:Sulfites; D014874:Water Pollutants, Chemical; C048856:permanganic acid; C006780:bisphenol A; D000098826:Bisphenol A Compounds; C042345:hydrogen sulfite; C023650:aniline