Characterization of organic precursors in DBP formation and AOC in urban surface water and their fate during managed aquifer recharge
| Autor: | Sung Kyu Maeng, Won Mo Lee, Hyun-Chul Kim, Jaewon Choi, Seunghak Lee |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Ozone 0208 environmental biotechnology 02 engineering and technology Fractionation 010501 environmental sciences Bacterial growth 01 natural sciences Water Purification chemistry.chemical_compound Dissolved organic carbon Organic matter Organic Chemicals Waste Management and Disposal Groundwater 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering chemistry.chemical_classification Total organic carbon Chemistry Ecological Modeling Water Pollution Carbon 020801 environmental engineering Environmental chemistry Water treatment Surface water Water Pollutants Chemical |
| Zdroj: | Water research. 123 |
| ISSN: | 1879-2448 |
| Popis: | In this study, the organic components were identified that are mainly responsible for the formation of disinfection byproducts (DBPs) and for the biostability of urban surface water. The compositional distribution of dissolved organic matter (DOM) was strongly associated with the potential for both DBP formation and bacterial growth. Further evaluation was carried out (1) to compare the potential for DBP formation upon chlorination of treated water, (2) to determine the biostability that might result from minimizing assimilable organic carbon (AOC), and (3) to use laboratory-scale soil-column experiments to compare the effects of removal of trace organic chemicals (TOrCs) between managed aquifer recharge (MAR) hybrid systems (such as bank filtration followed by artificial recharge and recovery: ARR), and ozonation followed by ARR. Our fractionation and removal methods provided useful insights into the removal of problematic organic components using MAR hybrid systems. Pretreatment with a small amount of ozone (∼0.7 mg-O 3 mg-C −1 ) resulted in improved ARR performance, especially from removing organic acids from DOM, which substantially decreased the potential for DBP formation, while the robust removal of AOC was attributed to a significant decrease in non-acidic and more hydrophilic fractions during soil passage. Both pretreatments used in this study were effective in the removal of selected TOrCs, but carbamazepine was persistent during soil passage. The pretreatment, which used ozonation before ARR, significantly enhanced the removal of carbamazepine; therefore, ozonation followed by ARR is considered an effective way to enhance removal of persistent compounds. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect