DOI: 10.1016/j.watres.2018.07.061
Scopus记录号: 2-s2.0-85053055034
论文题名: Rapid oxidation of iodide and hypoiodous acid with ferrate and no formation of iodoform and monoiodoacetic acid in the ferrate/I−/HA system
作者: Wang X. ; Liu Y. ; Huang Z. ; Wang L. ; Wang Y. ; Li Y. ; Li J. ; Qi J. ; Ma J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 144 起始页码: 592
结束页码: 602
语种: 英语
英文关键词: Disinfection byproducts
; Hypoiodous acid
; Iodide
; Iodinated disinfection byproducts
; Iodoform
Scopus关键词: Byproducts
; Disinfection
; Iodine
; Iodine compounds
; Potash
; Rate constants
; Water treatment
; Chemical oxidation
; Disinfection by-product
; Hypochlorous acids
; Iodide
; Iodinated disinfection by-products
; Iodoform
; Potassium permanganate
; Second-order rate constants
; Oxidation
; acetic acid
; byproduct
; chemical compound
; inhibition
; iodide
; oxidant
; oxidation
; reaction kinetics
; spectrophotometry
英文摘要: Toxic and odorous iodinated disinfection byproducts (I-DBPs) could form in the chemical oxidation of iodine-containing water. A critical step for controlling the hazardous I-DBPs is to convert the iodine species into stable and harmless iodate (IO3 −) while inhibiting the accumulation of highly reactive hypoiodous acid (HOI). Herein, the oxidation of I− and HOI with ferrate was investigated, and the formation profile of HOI was determined based on 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) coloring method through a stopped-flow spectrophotometer. The second-order rate constants (kapp) of ferrate with HOI decreased from 1.6 × 105 M−1s−1 to 8.3 × 102 M−1s−1 as the solution pH varied from 5.3 to 10.3, which were 7.5, 7.2 and 13.8 times higher than that of ferrate with I− at pH 6.0, 7.0 and 8.0, respectively. Compared with other oxidants such as ozone, hypochlorous acid, chloramine and potassium permanganate, ferrate would swiftly oxidize HOI formed in the I− oxidation process. For the ferrate oxidation of I-containing water, HOI was swiftly oxidized to IO3 − from pH 5.0 to 9.0. Phosphate buffer promoted the oxidation of I− while inhibited the oxidation of HOI with ferrate. When 5 mgC/L of humic acids (HA) existed in the solution, no formation of iodoform and monoiodoacetic acid (MIAA) was observed in the oxidation of iodide (20 μM) with ferrate (from 10 μM to 80 μM). These results suggested that ferrate oxidation could be an effective method for the control of I-DBPs in iodine-containing water treatment. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112530
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China
Recommended Citation:
Wang X.,Liu Y.,Huang Z.,et al. Rapid oxidation of iodide and hypoiodous acid with ferrate and no formation of iodoform and monoiodoacetic acid in the ferrate/I−/HA system[J]. Water Research,2018-01-01,144