Tracing sources of natural organic matter, trihalomethanes and metals in groundwater from a karst region
| Autor: | Connie O’Driscoll, Peter Croot, Liam Morrison, Eoin McGillicuddy, Pamela Bartley, John McMyler, Jerome Sheahan |
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| Přispěvatelé: | Environmental Protection Agency (EPA), Water - EPA Research Strategy 2014e2020 programme |
| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Other Civil and Environmental Engineering Karst 010501 environmental sciences 01 natural sciences Civil Engineering Natural organic matter Water Purification Natural Resources and Conservation Environmental Chemistry Drinking water Organic matter Groundwater 0105 earth and related environmental sciences chemistry.chemical_classification Total organic carbon geography geography.geographical_feature_category Granular activated carbon Environmental engineering Environmental Health and Protection General Medicine Pollution Disinfection Infiltration (hydrology) Water Resource Management chemistry Metals Environmental science Water treatment Surface water Water Pollutants Chemical Trihalomethanes Source protection zones |
| Zdroj: | Articles |
| Popis: | Groundwater offers an important source for drinking water around the world; however, groundwater quality is under increasing pressure and is particularly vulnerable in karst areas. Total organic carbon (TOC) is significantly related to groundwater quality and when not removed by water treatment processes can give rise to the formation of disinfection by-products trihalomethanes (THMs) above the level of compliance. This study investigated the source of organic matter giving rise to the THM exceedances in a groundwater supply in a karst area. Results highlighted that source water for this groundwater supply was prone to surface water infiltration linked to rainfall events; was not accurately captured in the zone of contribution (ZoC); had inadequate treatment of natural organic matter (NOM) and suffered THM exceedances in 45% of sampling events. THMs were mostly represented by chloroform and caused by terrestrial delivered reprocessed organic matter. This work will support water managers tasked with decision-making. |
| Databáze: | OpenAIRE |
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