DOI: 10.1016/j.watres.2018.04.048
Scopus记录号: 2-s2.0-85046839263
论文题名: The dependence of chlorine decay and DBP formation kinetics on pipe flow properties in drinking water distribution
作者: Zhao Y. ; Yang Y.J. ; Shao Y. ; Neal J. ; Zhang T.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 141 起始页码: 32
结束页码: 45
语种: 英语
英文关键词: Chlorine and THM model
; Flow velocity effect
; Kinetic variability
; NOM reactivity
; Wall demand
Scopus关键词: Biological materials
; Chlorine
; Disinfection
; Flow velocity
; Kinetics
; Pipe flow
; Potable water
; Rate constants
; Water quality
; Water supply systems
; Comparative experiments
; Disinfection byproducts
; Drinking water distribution
; Hydrodynamic conditions
; Natural organic matters
; THM modeling
; Velocity effects
; Wall demand
; Decay (organic)
; chlorine
; drinking water
; natural organic matter
; tap water
; trihalomethane
; water
; chlorine
; drinking water
; byproduct
; chemical reaction
; chlorine
; concentration (composition)
; drinking water
; experimental study
; fermentation
; flow velocity
; hydrodynamics
; hydrological modeling
; modeling
; organic matter
; pipe flow
; reaction kinetics
; turbidity
; water quality
; Article
; chemical reaction
; disinfection
; dispersion
; hydrodynamics
; kinetics
; priority journal
; tube flow
; water quality
; water supply
; chemistry
; devices
; disinfection
; kinetics
; procedures
; sanitation
; water management
; water pollutant
; Chlorine
; Disinfection
; Drinking Water
; Hydrodynamics
; Kinetics
; Sanitary Engineering
; Trihalomethanes
; Water Pollutants, Chemical
; Water Purification
英文摘要: Simultaneous chlorine decay and disinfection byproduct (DBP) formation have been discussed extensively because of their regulatory and operational significance. This study further examines chemical reaction variability in the water quality changes under various hydrodynamic conditions in drinking water distribution. The variations of kinetic constant for overall chlorine decay (kE) and trihalomethane (THM) formation were determined under stagnant to turbulent flows using three devices of different wall demand and two types of natural organic matters (NOM) in water. The results from the comparative experiments and modeling analyses show the relative importance of wall demand (kw), DBP-forming chlorine decay (kD), and other bulk demand (kb ’) for pipe flows of Re = 0-52500. It is found that chlorine reactivity of virgin NOM is the overriding factor. Secondly, for tap water NOM of lower reactivity, pipe flow properties (Re or u) can significantly affect kE, the THM yield (T), formation potential (Y), and the time to reach the maximum THM concentration (tmax) through their influence on kinetic ratio [Formula presented]. These observations, corroborating with turbidity variations during experiments, cannot be explained alone by chlorine dispersion to and from the pipe wall. Mass exchanges through deposition and scale detachment, most likely being flow-dependent, may have contributed to the overall chlorine decay and DBP formation rates. Thus for the simultaneous occurrence of chlorine decay and DBP formation, model considerations of NOM reactivity, pipe types (wall demand), flow hydraulics, and their interactions are essential. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112658
Appears in Collections: 气候减缓与适应
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作者单位: College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310027, China; U.S.EPA, Office of Research and Development, National Risk Management Research Laboratory, 26W. Martin Luther King Dr., Cincinnati, OH 45268, United States
Recommended Citation:
Zhao Y.,Yang Y.J.,Shao Y.,et al. The dependence of chlorine decay and DBP formation kinetics on pipe flow properties in drinking water distribution[J]. Water Research,2018-01-01,141