Isotopes and geochemical tools for investigating the source of metal pollution in Uchhali Lake
Uchalli Lake (Ramsar site), with a surface area of 14.3 km2, is the largest lake of the Uchhali Wetlands Complex. Heavy inorganic pollution (metals and nutrients) load in Uchhali Lake had been reported by other researchers, but sources of inorganic pollution in the lake and its effects on surroundin...
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-06-01
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| Series: | Water Practice and Technology |
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| Online Access: | http://wpt.iwaponline.com/content/18/6/1529 |
| _version_ | 1797783005602775040 |
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| author | Abdul Ghaffar |
| author_facet | Abdul Ghaffar |
| author_sort | Abdul Ghaffar |
| collection | DOAJ |
| description | Uchalli Lake (Ramsar site), with a surface area of 14.3 km2, is the largest lake of the Uchhali Wetlands Complex. Heavy inorganic pollution (metals and nutrients) load in Uchhali Lake had been reported by other researchers, but sources of inorganic pollution in the lake and its effects on surrounding groundwater have never been investigated. In the present study, the stable isotopes of δ18O and δ2H were applied to find out the recharge sources of lake and groundwater. Additionally, the isotopes of δ15N and δ18O (NO3) were used to find out the sources of pollution in the lake system. The stable isotopes and geochemical data suggested that the lake was mainly recharged by local meteoric water. The higher evaporation of lake water coupled with the alkaline nature of lake sediments led to the enrichment of pollutants in the sediments. Nitrate isotopes δ15N and δ18O suggested both geogenic and anthropogenic sources of pollution in the lake system. The geogenic sources are mainly comprised of rock/minerals weathering and soil erosion, whereas the anthropogenic sources are mainly comprised of agricultural activities in lake catchment areas. The δ18O, δ2H, and D-excess values suggested that the groundwater in the area is mainly recharged by rainwater, with limited contribution from the lake water to the groundwater system.
HIGHLIGHTS
High concentrations of metals in the lake system.;
Stable isotope values in lake water and sediments.;
Water recharge sources of the lake through δ18O and δ2H values of lake water.;
Identification of metal sources through δ15N and δ18O of NO3 in sediments of lake.;
Identification of groundwater recharge sources.; |
| first_indexed | 2024-03-13T00:19:58Z |
| format | Article |
| id | doaj.art-0bad399f14ff41b38a79b01417921c2a |
| institution | Directory Open Access Journal |
| issn | 1751-231X |
| language | English |
| last_indexed | 2024-03-13T00:19:58Z |
| publishDate | 2023-06-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Practice and Technology |
| spelling | doaj.art-0bad399f14ff41b38a79b01417921c2a2023-07-11T16:24:17ZengIWA PublishingWater Practice and Technology1751-231X2023-06-011861529154210.2166/wpt.2023.093093Isotopes and geochemical tools for investigating the source of metal pollution in Uchhali LakeAbdul Ghaffar0 Isotope Application Division, Pakistan Institute of Nuclear Science and Technology (PINSTECH), Islamabad, Pakistan Uchalli Lake (Ramsar site), with a surface area of 14.3 km2, is the largest lake of the Uchhali Wetlands Complex. Heavy inorganic pollution (metals and nutrients) load in Uchhali Lake had been reported by other researchers, but sources of inorganic pollution in the lake and its effects on surrounding groundwater have never been investigated. In the present study, the stable isotopes of δ18O and δ2H were applied to find out the recharge sources of lake and groundwater. Additionally, the isotopes of δ15N and δ18O (NO3) were used to find out the sources of pollution in the lake system. The stable isotopes and geochemical data suggested that the lake was mainly recharged by local meteoric water. The higher evaporation of lake water coupled with the alkaline nature of lake sediments led to the enrichment of pollutants in the sediments. Nitrate isotopes δ15N and δ18O suggested both geogenic and anthropogenic sources of pollution in the lake system. The geogenic sources are mainly comprised of rock/minerals weathering and soil erosion, whereas the anthropogenic sources are mainly comprised of agricultural activities in lake catchment areas. The δ18O, δ2H, and D-excess values suggested that the groundwater in the area is mainly recharged by rainwater, with limited contribution from the lake water to the groundwater system. HIGHLIGHTS High concentrations of metals in the lake system.; Stable isotope values in lake water and sediments.; Water recharge sources of the lake through δ18O and δ2H values of lake water.; Identification of metal sources through δ15N and δ18O of NO3 in sediments of lake.; Identification of groundwater recharge sources.;http://wpt.iwaponline.com/content/18/6/1529metals induction sourcesmetals pollutionsources of nitratesstable isotopeswater recharge sources |
| spellingShingle | Abdul Ghaffar Isotopes and geochemical tools for investigating the source of metal pollution in Uchhali Lake Water Practice and Technology metals induction sources metals pollution sources of nitrates stable isotopes water recharge sources |
| title | Isotopes and geochemical tools for investigating the source of metal pollution in Uchhali Lake |
| title_full | Isotopes and geochemical tools for investigating the source of metal pollution in Uchhali Lake |
| title_fullStr | Isotopes and geochemical tools for investigating the source of metal pollution in Uchhali Lake |
| title_full_unstemmed | Isotopes and geochemical tools for investigating the source of metal pollution in Uchhali Lake |
| title_short | Isotopes and geochemical tools for investigating the source of metal pollution in Uchhali Lake |
| title_sort | isotopes and geochemical tools for investigating the source of metal pollution in uchhali lake |
| topic | metals induction sources metals pollution sources of nitrates stable isotopes water recharge sources |
| url | http://wpt.iwaponline.com/content/18/6/1529 |
| work_keys_str_mv | AT abdulghaffar isotopesandgeochemicaltoolsforinvestigatingthesourceofmetalpollutioninuchhalilake |