Contemporary issues on the occurrence and removal of disinfection byproducts in drinking water - A review

Chaukura, Nhamo; Marais, Savia S.; Moyo, Welldone; Mbali, Nosibusiso; Thakalekoala, Limakatso C.; Ingwani, Thomas; Mamba, Bhekie B.; Jarvis, Peter; Nkambule, Thabo T.I.

doi:10.1016/j.jece.2020.103659

Cited by 99 publications

(46 citation statements)

References 133 publications

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“…However, investment in resource management has been seriously neglected. An important part of the environmental degradation suffered by the planet is caused by the discharge of untreated or mistreated wastewater [5].…”

Section: Introductionmentioning

confidence: 99%

Economic Sustainability in Wastewater Treatment Companies: A Regional Analysis for the Iberian Peninsula

2021

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An important part of environmental degradation is caused by the discharge of untreated or mistreated wastewater. The reuse of water is paramount to the National Strategic Plan for the Water Supply and Wastewater Sanitation Sector in Portugal and Spain. Since centralized treatment systems have proved to be inefficient, tackling environmental issues requires a regional approach. Wastewater treatment plants (WWTPs) mitigate environmental impacts and contribute to the financial savings of other firms. However, the literature evaluating WWTPs’ financial performance and economic sustainability is scarce. The implementation of a resource recovery technology depends heavily on economic viability. Thus, this paper analyses the financial sustainability of 222 WWTPs in the Iberian Peninsula by NUTS II regions in 2016–2019 to assess the region with the best performance and financial stability and provide regional policy implications. Using the SABI database, this research encompasses a numerical and narrative analysis of key financial ratios. Results show that firms in Algarve and La Rioja exhibit higher financial sustainability when compared to other regions. Results can foster enhancements in the governance of regulated utilities.

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Section: Introductionmentioning

confidence: 99%

Economic Sustainability in Wastewater Treatment Companies: A Regional Analysis for the Iberian Peninsula

2021

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“…Because of the COVID-19 epidemic, disinfection in all areas of life, and especially in medical sewage treatment, has greatly increased ( Wang et al., 2020 ). Disinfectants such as chlorine, chloramine, and chlorine dioxide (ClO 2 ) can react with organic matter to form disinfection byproducts (DBPs) ( Chaukura et al., 2020 ; Han and Zhang, 2018 ; Kimura and Ortega-Hernandez, 2019 ). Although DBPs are generally formed by the reaction of disinfectants with natural organic matter, antibiotics with activated benzene rings or other functional groups that can react with disinfectants are also potential DBP precursors, especially in heavily wastewater-affected waters ( Chu et al., 2016 ).…”

Section: Introductionmentioning

confidence: 99%

Tetracycline antibiotics as precursors of dichloroacetamide and other disinfection byproducts during chlorination and chloramination

Shao

Huang

et al. 2021

Chemosphere

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Pollution of natural water and even source water with pharmaceuticals is problematic worldwide and raises concern about the possibility of disinfection byproduct (DBP) formation during subsequent water treatment. In this study, the formation of DBPs, especially dichloroacetamide (DCAcAm), was investigated during chlorination and chloramination of tetracyclines, which are a class of broad-spectrum antibiotics. DBPs including DCAcAm were formed during chlorination and chloramination of tetracycline (TC). Although the concentrations and theoretical cytotoxicity of the DBPs formed from TC were affected by the contact time, disinfectant dose, and pH, DCAcAm was the main contributor determining the yields and cytotoxicity of the measured DBPs. The DCAcAm yields from four tetracycline antibiotics ranged from 0.43% to 54.26% for chlorination. For chloramination, the DCAcAm yields reached 44.57%, and the nitrogen in DCAcAm mainly came from tetracycline antibiotics rather than chloramines. ClO 2 pre-oxidation and UV photolysis decreased DCAcAm formation during chlorination and chloramination of TC. The high yields observed in this study suggest that tetracycline antibiotics are possible precursors of DCAcAm.

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“…However, costs and technologies usually limit the choice of water treatment methods. At present, an effective and economical strategy to control the formation of DBPs in DWTPs is to remove the precursors before they react with disinfectants (Chaukura et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Pilot study on the treatment of lake water with algae by ultrafiltration–ozone–biologically activated carbon

Yan

Gui

et al. 2021

Journal of Water Supply: Research and Technology-Aqua

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For the treatment of lake water with algae, the coagulation–ultrafiltration–ozone–biologically activated carbon (CUF–O3–BAC) integrated process was first used to treat East Taihu Lake water in China, aiming at evaluating the removal efficiencies of algae, permanganate index (CODMn), UV254, NH3-N and disinfection by-products (DBPs) precursors. In addition, the long-term performance of the membrane operation under the fluxes of 60, 70, 80 and 90 L/(m2·h) was also investigated, and kinetic models were established. The experimental results showed that the integrated process had positive impaction of algae, CODMn, UV254 and NH3-N removal, and the removal rates were 95.89 ± 1.52, 76.18 ± 4.38, 72.06 ± 4.72 and 81.31 ± 6.71%, respectively. The CUF process was prone to increase the formation potentials of DBPs. Although ozone could reduce the formation risks of chlorinated trihalomethanes (THMs) to a certain extent, it is ineffective to reduce those of brominated THMs and haloacetic acids (HAA5). However, the CUF–O3–BAC process was an effective technology for the removal of THMs and HAA5 precursors in drinking water treatment. Finally, it was found that the relationship between transmembrane pressure and time conformed to the first-order and second-order kinetic models, and the linear fitting coefficients were all above 90%.

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Contemporary issues on the occurrence and removal of disinfection byproducts in drinking water - A review

Cited by 99 publications

References 133 publications

Economic Sustainability in Wastewater Treatment Companies: A Regional Analysis for the Iberian Peninsula

Economic Sustainability in Wastewater Treatment Companies: A Regional Analysis for the Iberian Peninsula

Tetracycline antibiotics as precursors of dichloroacetamide and other disinfection byproducts during chlorination and chloramination

Pilot study on the treatment of lake water with algae by ultrafiltration–ozone–biologically activated carbon

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