Spatiotemporal Variation of Groundwater Arsenic in Pampanga, Philippines
| Autor: | Augustus C. Resurreccion, Roel C. Parangat, Kurt Louis B. Solis, Joey D. Ocon, Reygie Q. Macasieb |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Wet season
lcsh:Hydraulic engineering 0208 environmental biotechnology Geography Planning and Development chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Aquatic Science 01 natural sciences Biochemistry Mean difference lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Dry season groundwater medicine mapping Arsenic 0105 earth and related environmental sciences Water Science and Technology Hydrology lcsh:TD201-500 seasonal variation Groundwater arsenic Significant difference arsenic Seasonality medicine.disease 020801 environmental engineering chemistry Environmental science Groundwater |
| Zdroj: | Water Volume 12 Issue 9 Water, Vol 12, Iss 2366, p 2366 (2020) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w12092366 |
| Popis: | Several confirmed cases of arsenic (As) poisoning have been reported in Central Luzon, the Philippines, in recent years. There is a growing interest in As research in the Philippines due to the reported As poisoning cases. However, an extensive spatiotemporal As study has not been conducted. In this work, As concentration measurements were conducted in 101 wells in Guagua, Pampanga, in Central Luzon, the Philippines, from November 2018 to November 2019. The wells included 86 public hand pumps, 10 pumping stations, and 5 private, jet-powered pumps. Using hydride generation&mdash inductively coupled plasma&mdash optical emission spectroscopy (HG-ICP-OES), analysis of the wells in 12 barangays in Guagua revealed that 38.7% had average As concentrations beyond the 10 ppb limit with some wells having high Mn (4.0 ppm) and Fe (2.0 ppm) content as well. The high pH and reducing conditions in the wells in Guagua may have contributed to the persistence of As in the groundwater. The mean difference in wet season versus dry season As measurements were &minus 4.4 (As < 10 ppb), &minus 13.2 (10 to 50 ppb As), and &minus 27.4 (As > 50 ppb). Eighty-three wells (82.2%) had higher As concentrations in the dry season, 8 wells (7.92%) had higher As concentrations in the wet season, 7 wells (6.93%) had no significant difference between the wet and dry season, and 3 wells had been decommissioned. These results indicate that there is a significant difference in As concentrations in the wet and dry seasons, and this could have implications in water treatment technology and policy implementation. The work resulted in the first year-long characterization of groundwater As in the Philippines. |
| Databáze: | OpenAIRE |
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