Formation and speciation of disinfection byproducts in desalinated seawater blended with treated drinking water during chlorination

Cai, Meiquan; Liu, Wenjun; Sun, Wenjun

doi:10.1016/j.desal.2018.02.009

Cited by 27 publications

(7 citation statements)

References 42 publications

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“…Whilst this observation is counter-intuitive, in that higher tTHM levels would be expected from higher feed bromide concentrations [25][26][27], similar trends have been reported previously [14,28]. As with the current study, these two studies were based on real UK surface waters with bromide levels substantially lower than the DOC concentrations.…”

Section: J O U R N a L P R E -P R O O Fsupporting

confidence: 69%

“…As with the current study, these two studies were based on real UK surface waters with bromide levels substantially lower than the DOC concentrations. The reported work of Szczuka et al [25] and Cai et al [27], on the other hand, were based either on groundwater with seawater intrusion with higher Br/DOC ratios or desalinated seawater blended with drinking water. In terms of toxicity, recently, an approach has been taken to assess the toxicity of a water sample in terms of the relative cytotoxicity and genotoxicity of DBPs rather than the mass of the DBPs measured [45].…”

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

“…Reported outcomes across all studies have been inconsistent. Most authors have reported an increase in total DBP concentration with increasing bromine substitution (the proportion of brominated species making up the total DBP concentration) [25][26][27]. Conversely, and counter-intuitively, others [14,28] have reported a decrease, with some recent indication of the trend depending on the precise precursor [29].…”

Section: Introductionmentioning

confidence: 99%

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Sorptive removal of disinfection by-product precursors from UK lowland surface waters: Impact of molecular weight and bromide

Carra

Lozano

Johannesen

et al. 2021

Science of The Total Environment

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The current study compared the impact of three different unit processes, coagulation, granular activated carbon (GAC), and a novel suspended ion exchange (SIX) technology, on disinfection by-product formation potential (DBPFP) from two UK lowland water sources with medium to high bromide content. Specific attention was given to the influence of the organic molecular weight (MW) fraction on DBPFP as well as the impact of bromide concentration.While few studies have investigated the impact of MW fractions from Liquid Chromatography with Organic Carbon Detection (LC-OCD) analysis on dissolved organic carbon (DOC) removal by different processes, none have studied the influence of DOC MW fractions from this analysis on DBP formation. The impact of higher bromide concentration was to decrease the total trihalomethane (THM) and haloacetic acid (HAA) mass concentration, in contrast to previously reported studies. Results indicated that for a moderate bromide concentration source (135 µg/L), the THM formation potential was reduced by 22% or 64% after coagulation or SIX treatment, respectively. For a high bromide content source (210 µg/L), the THM formation potential removal was 47% or 69% following GAC and SIX treatment, respectively. The trend was the same for HAAs, albeit with greater differences between the two processes/feedwaters with reference to overall removal. A statistical analysis indicated

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Section: J O U R N a L P R E -P R O O Fsupporting

confidence: 69%

Section: J O U R N a L P R E -P R O O Fmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sorptive removal of disinfection by-product precursors from UK lowland surface waters: Impact of molecular weight and bromide

Carra

Lozano

Johannesen

et al. 2021

Science of The Total Environment

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“…Moreover, another study have studied the formation of 21 disinfection by-products during chlorination in two different desalinated seawater blends (treated drinking water blended with RO permeate and post-treatment (PT) product water). Results have revealed that around sixteen disinfection by-products were detected in both blends during chlorination [533].…”

Section: Technological Challengesmentioning

confidence: 99%

Reverse osmosis desalination: A state-of-the-art review

et al. 2019

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Water scarcity is a grand challenge that has always stimulated research interests in finding effective means for pure water production. In this context, reverse osmosis (RO) is considered the leading and the most optimized membrane-based desalination process that is currently dominating the desalination market. In this review, various aspects of RO desalination are reviewed. Theories and models related to concentration polarization and membrane transport, as well as merits and drawbacks of these models in predicting polarization effects, are discussed. An updated review of studies related to membrane modules (plate and frame, tubular, spiral wound, and hollow fiber) and membrane characterization are provided. The review also discusses membrane cleaning and different pre-treatment technologies in place for RO desalination, such as feed-water pre-treatment and biocides. RO pre-treatment technologies, which include conventional (e.g., coagulationflocculation, media filtration, disinfection, scale inhibition) and non-conventional (e.g., MF, UF, and NF) are reviewed and their relative attributes are compared. As per the available literature, UF, MF and coagulation-flocculation are considered the most widely used pre-treatment technologies. In addition, this review discusses membrane fouling, which represents a serious challenge in RO processes due to its significant contribution to energy requirements and process economy (e.g., flux decline, permeate quality, membrane lifespan, increased feed pressure, increased pre-treatment and membrane maintenance cost). Different membrane fouling types, such as colloidal, organic, inorganic, and biological fouling, are addressed in this review. Principles of RO process design and the embedded economic and energy considerations are discussed. In general, cost of water desalination has dropped to values that made it a viable option, comparable even to conventional water treatment methods. Finally, an overview of hybrid RO desalination processes and the current challenges faced by RO desalination processes are presented and discussed.

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“…Failure in water treatment processes can be one such pathway. Additionally, the issue can be challenging for desalinated water as it is more corrosive than conventionally treated water . Distribution systems can also be a significant cause for concern due to strong relationship between the infrastructure integrity and the quality of water in the distribution system .…”

Section: Introductionmentioning

confidence: 99%

Impacts of Water Quality on the Spatiotemporal Susceptibility of Water Distribution Systems

Mortula

Ali

Sadiq

et al. 2019

CLEAN Soil Air Water

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Maintaining water quality in distribution systems is crucial for ensuring safety of water supply. The distribution infrastructure is typically buried underground and it is often difficult to assess the condition of the system. In case of breakage of underground pipe network, external agents, like microorganisms may ingress into the distribution system which then react with residual disinfectant (chlorine) and result in faster decay. Understanding the chlorine decay is critical to ensuring the acceptable condition of the water distribution infrastructure. The objective of this study is to assess the spatiotemporal susceptibility of a water distribution network based on water quality variations. GIS based residual chlorine decay, temperature, and Langelier saturation index (LSI) profiles for the entire water distribution network are created using inverse distance weighting technique. Hotspot analysis is conducted to identify the vulnerable sections of the city's water distribution network based on residual chlorine. Spatial variations can not identify a consistent pattern of decay throughout the distribution system. However, some sections of the old part (North western) of the city show low residual chlorine levels compared to other locations. LSI values are negative in some source waters, leading to potential degradation of the distribution pipes. Temporal variations indicate that residual chlorine levels drop late summer and early fall. However, hotspot analysis identifies that some of the old part of Sharjah has consistently low residual chlorine levels, indicating considerable degradation of the distribution pipes.

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Formation and speciation of disinfection byproducts in desalinated seawater blended with treated drinking water during chlorination

Cited by 27 publications

References 42 publications

Sorptive removal of disinfection by-product precursors from UK lowland surface waters: Impact of molecular weight and bromide

Sorptive removal of disinfection by-product precursors from UK lowland surface waters: Impact of molecular weight and bromide

Reverse osmosis desalination: A state-of-the-art review

Impacts of Water Quality on the Spatiotemporal Susceptibility of Water Distribution Systems

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