Characterization of organic precursors in DBP formation and AOC in urban surface water and their fate during managed aquifer recharge

Kim, Hyun-Chul; Lee, Won Mo; Lee, Seunghak; Choi, Jaewon; Maeng, Sung Kyu

doi:10.1016/j.watres.2017.06.038

Cited by 27 publications

(17 citation statements)

References 43 publications

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“…MAR systems such as riverbank filtration (RBF) are emerging in Korea as an alternative solution [2]. RBF is a water treatment process that uses the physical, chemical and biological degradation processes of aquifers [6,7], and it is a nature-friendly water treatment process that removes pollutants without using chemicals [8]. RBF is also effective at alleviating the production of disinfection by-products and reducing trace organic contaminants [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…RBF is also effective at alleviating the production of disinfection by-products and reducing trace organic contaminants [9][10][11]. In addition, it is also suitable for water safety and management [8,12]. In the early 2000s, a RBF system was first introduced to improve the water quality of drinking water resources in South Korea, especially in the regions where there was poor water quality for a decade due to the wastewater effluents discharged from local industries.…”

Section: Introductionmentioning

confidence: 99%

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Riverbank Filtration for the Water Supply on the Nakdong River, South Korea

Maeng

Lee

2019

Water

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A field study was carried out to investigate the feasibility of a riverbank filtration site using two vertical wells on the Nakdong River, South Korea. The riverbank filtration site was designed to have eleven horizontal collector wells in order to supply 280,000 m 3 /day. This field study provided more insight into the fate of the dissolved organic matter's characteristics during soil passage. The vertical production wells (PWs) were located in different aquifer materials (PW-Sand and PW-Gravel) in order to determine the depth of the laterals for the horizontal collector wells. The turbidity of the riverbank filtrates from the PW-Sand (0.9 NTU) and PW-Gravel (0.7 NTU) was less than 1 NTU, which was the target turbidity of the riverbank filtrate in this study. The iron concentrations were 18.1 ± 0.8 and 25.9 ± 1.3 mg/L for PW-Sand and PW-Gravel respectively, and were higher than those of the land-side groundwater. The biodegradable organic matter-determined biochemical oxygen demand in the river water was reduced by more than 40% during soil passage, indicating that less microbial growth in the riverbank filtrate could be possible. Moreover, the influence of the pumping rates of the vertical wells on the removal of dissolved organic matter and the turbidity was not significant.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Riverbank Filtration for the Water Supply on the Nakdong River, South Korea

Maeng

Lee

2019

Water

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“…Removing specific fractions of dissolved organic matter (DOM) from the source water plays a critical role for drinking water treatment efficiency; low molecular weight (LMW) hydrophilic compounds that are recalcitrant to removal may bypass the coagulation and flocculation stages of the treatment to react with disinfecting agents, eventually leading to the formation of potentially carcinogenic disinfection byproducts (DBPs) [1]. Although high molecular weight (HMW) hydrophobic compounds are the major precursors of DBPs formation [2], they have higher specific colloidal charge properties that make them easily removable during coagulation [3].…”

Section: Introductionmentioning

confidence: 99%

Multi-Parameter Compensation Method for Accurate In Situ Fluorescent Dissolved Organic Matter Monitoring and Properties Characterization

Oliveira

Bertone

Stewart

et al. 2018

Water

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The recent deployment of fluorescent dissolved organic matter (fDOM) probes in dam catchments and drinking water treatment plants (DWTP) for water quality monitoring purposes has resulted in the production of a large amount of data that requires scientific evaluation. This study introduces a comprehensive, transferable methodological framework for scientists and water professionals to model fluorescence site-specific quenching on fDOM probe readings caused by temperature, suspended particles, and the inner filter effect (IFE) and applies it to an Australian subtropical reservoir. The findings revealed that quenching due to turbidity and IFE effects were best predicted by threshold autoregressive models. Raw fDOM probe measurements were validated as being more reliable if they were systematically compensated using the proposed procedure. The developed fDOM compensation procedure must consider the instrument features (i.e., wavelength broadband and responsiveness) and site-specific conditions (i.e., DOM characteristics and suspended particles). A finding of particular interest was that the compensated normalized fDOM readings had a high correlation with the low (<500 Da) molecular weight fraction of the DOM, which is more recalcitrant to removal by coagulation. As a consequence, there is potential to use compensated fDOM probe readings to provide real-time, in situ information on DOM properties in freshwater systems, which will enable water treatment plant operators to optimize the coagulation process.

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“…This technique is considered to be environmentally friendly and costeffective, but there are trace organic compounds (TOrCs) that are incompletely removed or not removed in the aquifer. 3 Biological processing for domestic wastewater treatment generally focuses on removing biodegradable organic carbon and inorganic nutrients, and a broad range of TOrCs are removed with various degrees of success during the treatment. 4 Thereby, this can lead to accumulation of non-or slowly biodegradable compounds and their persistent metabolites in the effluent.…”

Section: Introductionmentioning

confidence: 99%