DOI: 10.1016/j.watres.2018.11.059
Scopus记录号: 2-s2.0-85057460152
论文题名: Phototransformation of halophenolic disinfection byproducts in receiving seawater: Kinetics, products, and toxicity
作者: Liu J. ; Zhang X. ; Li Y. ; Li W. ; Hang C. ; Sharma V.K.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 68
结束页码: 76
语种: 英语
英文关键词: DBPs
; Disinfection byproducts
; Photoconversion
; Phototransformation
; Toxicity
Scopus关键词: Aromatic compounds
; Chlorine compounds
; Disinfection
; Dissociation
; Effluents
; Ions
; Marine biology
; Rate constants
; Seawater effects
; Toxicity
; DBPs
; Disinfection by-product
; Disinfection byproducts
; Dissociation constant
; Fresh water resources
; Photoconversion
; Phototransformations
; Quantitative structures
; Wastewater treatment
; 2 bromo 4 chlorophenol
; 2,4 dibromophenol
; 2,4 dichlorophenol
; 2,4,6 tribromophenol
; 2,4,6 trichlorophenol
; 2,4,6 triiodophenol
; 2,5 dibromohydroquione
; 2,6 dibromo 4 nitrophenol
; 2,6 dibromophenol
; 2,6 dichloro 4 nitrophenol
; 2,6 dichlorophenol
; 3,5 dibromo 4 hydroxybenzaldehyde
; 3,5 dichloro 4 hydroxybenzaldehyde
; 3,5 diiodo 4 hydroxybenzaldehyde
; 4 bromo 2 chlorophenol
; 4 bromophenol
; 4 chlorophenol
; 4 iodophenol
; 5 bromosalicylic acid
; 5 chlorosalicylic acid
; disophenol
; halophenol
; sea water
; unclassified drug
; aquatic organism
; byproduct
; chemical compound
; disinfection
; effluent
; marine ecosystem
; marine environment
; photolysis
; reaction kinetics
; seawater
; toxicity
; transformation
; wastewater
; wastewater treatment
; Article
; disinfection
; EC50
; kinetics
; light exposure
; nonhuman
; priority journal
; quantitative structure activity relation
英文摘要: Flushing toilet with seawater is an effective method for preserving freshwater resources, but it introduces iodide and bromide ions into domestic wastewater. During chlorine disinfection, iodide and bromide ions in the saline wastewater effluent lead to the formation of iodinated and brominated aromatic disinfection byproducts (DBPs). Examples of aromatic DBPs include iodophenolic, bromophenolic and chlorophenolic compounds, which generally display substantially higher toxicity than haloaliphatic DBPs. This paper presented for the first time the rates of phototransformation of 21 newly identified halophenolic DBPs in seawater, the receiving waterbody of the wastewater effluent. The phototransformation rate constants (k) were in the range from 7.75 × 10 −4 to 4.62 × 10 −1 h −1 , which gave half-lives of 1.5–895 h. A quantitative structure−activity relationship was established for the phototransformation of halophenolic DBPs as logk=−0.0100×ΔG f 0 +5.7528×logMW+0.3686×pKa−19.1607, where ΔG f 0 is standard Gibbs formation energy, MW is molecular weight, and pK a is dissociation constant. This model well predicted the k values of halophenolic DBPs. Among the tested DBPs, 2,4,6-triiodophenol and 2,6-diiodo-4-nitrophenol were found to exhibit relatively high risks on marine organisms, based on toxicity indices and half-lives. In seawater, the two DBPs underwent photonucleophilic substitutions by bromide, chloride and hydroxide ions, resulting in the conversion to their bromophenolic and chlorophenolic counterparts (which are less toxic than the parent iodophenolic DBPs) and to their hydroxyphenolic counterparts (iodo(hydro)quinones, which are more toxic than the parent iodophenolic DBPs). The formed iodo(hydro)quinones further transformed to hydroxyl-iodo(hydro)quinones, which have lower toxicity than the parent compounds. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122104
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong; Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, TX, United States
Recommended Citation:
Liu J.,Zhang X.,Li Y.,et al. Phototransformation of halophenolic disinfection byproducts in receiving seawater: Kinetics, products, and toxicity[J]. Water Research,2019-01-01