Removal of carbonaceous and nitrogenous disinfection by-product precursors in biological activated carbon process of drinking water: Is service life a pivotal factor?

Wang, Yan; Li, Lingfei; Dong, Huiyu; Wang, Qi; Liu, Shuang; Wu, Minhui; Qiang, Zhimin

doi:10.1016/j.cej.2023.142875

Cited by 5 publications

(1 citation statement)

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“…During oxidative water treatments, dissolved organic matter (DOM) serves as not only the primary sink for the dosed oxidant , but also the primary precursor of DBPs. − Previous studies have shown that changes of DOM characteristics closely correlate with DBP formation, , and the redox-active moieties of DOM compete directly for the oxidant against MPs. − Therefore, monitoring the changes in DOM characteristics induced by oxidation is a feasible way to determine the appropriate oxidant dosage. , Currently, the surrogate indicators commonly employed to optimize the oxidant dosage include the dissolved organic carbon (DOC), UV absorbance at 254 nm (UV 254 ), and fluorescence index (FI). ,,, However, DOC cannot effectively indicate MP abatement and DBP formation due to limited organic mineralization. , In addition, although the spectroscopic surrogate indicators (UV 254 and FI) have been extensively adopted in oxidative water treatments − and correlate well with MP abatement and DBP formation in lab-scale and full-scale experiments, ,,− they just reflect the changes in the chromophoric moieties of DOM. Therefore, it is necessary to develop a new surrogate indicator to enhance the precision, reliability, and robustness of existing control systems for oxidative water treatments.…”

Section: Introductionmentioning

confidence: 99%

Electron Donating Capacity: A Promising Surrogate Indicator for the Optimization of Oxidative Water Treatments

Ji,

Dong,

Wang

et al. 2024

ACS EST Water

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The redox-active moieties of dissolved organic matter (DOM) significantly influence the degradation of pollutants in oxidative water treatments. Because electron donating capacity (EDC) directly probes the redox properties of DOM, it tends to be a promising surrogate indicator to reflect changes in the DOM oxidation state. Given the complexity of applying EDC to optimizing oxidation processes, this review summarizes a history of advances in EDC analytical methods and discusses key factors for the standardization of EDC measurement. The EDC and UV 254 reductions induced by chemical oxidation are summarized to develop tailored water treatment control strategies. In addition, the applicability of EDC to indicate micropollutant abatement and disinfection byproduct formation is evaluated. Oxidative water treatments with chlorine, chlorine dioxide, permanganate, and ferrate yield a more pronounced reduction in EDC than in UV 254 due to the formation of quinone moieties, while ozonation causes a comparatively smaller EDC reduction but a larger UV 254 reduction. For oxidative water treatments in which the oxidant dosage is difficult to predict, EDC could serve as a promising surrogate indicator to meet treatment goals.

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