Arsenic contamination in rainwater harvesting tanks around Lake Poopó in Oruro, Bolivia: An unrecognized health risk
| Autor: | Ward Quaghebeur, Jhonny Terrazas García, Silke Ronsse, Carla Valdivia Mendizábal, Riley Mulhern, Hester Blommaert, Sid Potemans, Sara Heylen |
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| Rok vydání: | 2019 |
| Předmět: |
Bolivia
Environmental Engineering 010504 meteorology & atmospheric sciences Rain Drainage basin chemistry.chemical_element 010501 environmental sciences Risk Assessment 01 natural sciences Arsenic Rainwater harvesting Humans Environmental Chemistry Leaching (agriculture) Waste Management and Disposal 0105 earth and related environmental sciences geography geography.geographical_feature_category Pollution Arsenic contamination of groundwater Water security chemistry Environmental science Water quality Water resource management Water Pollutants Chemical Groundwater Environmental Monitoring |
| Zdroj: | Science of The Total Environment. 688:224-230 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2019.06.126 |
| Popis: | Drinking water sources used by largely rural and indigenous communities around Lake Poopo in the Bolivian Altiplano are impacted by drought and a combination of natural and anthropogenic mining-related contaminants putting the long-term health and sustainability of these communities at risk. As an alternative drinking water source, 18 rainwater harvesting tanks connected to corrugated iron roofs, each with a first-flush system, were installed in 5 communities around the lake. The water quality of these tanks was monitored over 22 months and compared to alternative unprotected surface and groundwater sources the communities previously relied upon. The rainwater quality was found to be within the Bolivian and World Health Organization (WHO) limits, except for elevated arsenic concentrations two times the recommended health limit (0.01 mg/L). Tracing arsenic concentrations through the rainwater flow-path showed that the elevated arsenic concentrations result from mineral dust particles entering the system when rainwater interacts with the roof catchment, with arsenic leaching out. A leaching test showed that 24 h of contact time between 200 mL of water and |
| Databáze: | OpenAIRE |
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