Spatiotemporal evolvement and factors influencing natural and synthetic EDCs and the microbial community at different groundwater depths in the Chaobai watershed: A long-term field study on a river receiving reclaimed water
| Autor: | Weifang Ma, Yayun Xiang, Yulin Yan, Eldon R. Rene, Peijing Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
River ecosystem Watershed 0208 environmental biotechnology Aquifer 02 engineering and technology Endocrine Disruptors 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Rivers Groundwater Waste Management and Disposal 0105 earth and related environmental sciences Hydrology geography geography.geographical_feature_category Microbiota Water General Medicine Reclaimed water 020801 environmental engineering Water resources Environmental science Spatial variability Surface water Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Journal of Environmental Management. 246:647-657 |
| ISSN: | 0301-4797 |
| Popis: | In this long-term field study, to restore a dried river ecosystem, reclaimed water was used as a supplementary water source. The main aim of this study was to investigate the accumulation and migration potential of EDCs in groundwater during long-term utilization of reclaimed water and the changes in microbial community during the removal of EDCs. A long-term field study was conducted in order to ascertain the temporal and spatial distribution of four selected endocrine-disrupting chemicals (EDCs) in an underground aquifer in the Chaobai watershed, where reclaimed water is the primary water source. Anew, the microbial community structure at different groundwater depths, along with related environmental factors were also determined. Based on the results obtained from this long-term study, it was found that the EDCs in the surface water of the Chaobai river have entered a depth of 80 m in the groundwater aquifers, within a distance of 360 m from the river. The vertical profiles of the concentrations of bisphenol A (BPA), 4-nonylphenol (NP), estrone (E1), and estriol (E3) decreased significantly from the surface to different groundwater depths with first-order attenuation rates of 0.0416, 0.0343, 0.0498, and 0.0173 m-1. The aquifer depth, water temperature, conductivity, and coexisting anions correlated well with the distribution of EDCs in groundwater. |
| Databáze: | OpenAIRE |
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