Browsing by Autor "Jyoti Prakash Maity"

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Arsenic and other trace elements in thermal springs and in cold waters from drinking water wells on the Bolivian Altiplano
(Elsevier BV, 2015) Mauricio Ormachea; Prosun Bhattacharya; Ondra Šráček; Oswaldo Ramos Ramos; Jorge Quintanilla Aguirre; Jochen Bundschuh; Jyoti Prakash Maity
Arsenic mobility in hydrogeologic system of Bolivian Altiplano: Status and comparison of the Lower Katari and Southern Poopó Basins
(2024) Israel Quino Lima; Mauricio Ormachea; Oswaldo Eduardo Ramos Ramos; Javier Quintanilla; Jyoti Prakash Maity; Ahmad Arslan; Prosun Bhattacharya
Water resource in LKB (Lower Katari Basin) and SPB (Southern Poopó Basin) [TDPS (Lake Titicaca – Desaguadero River – Lake Poopó – Salt Flat of Coipasa) system] the southeastern part of Lake Titicaca and Lake Poopó in Bolivian Altiplano are contaminated with high concentrations of arsenic (As) (>10 μg/L) compared to the WHO and NB-512 guideline. Studied regions are characterized by a semiarid climate, slow hydrological flow, with geological formations of volcanic origin including brines and mineral deposits. The investigation focused on evaluating the present status and comparison of the geochemical processes of As in relation to the sources and mobilization in groundwater (GW) in LKB and SPB. Groundwater (GW), surface water (SW) and sediment samples were collected from both basins. The elevated concentration of As (LKB: 0.8–288 μg/L and SPB: 2.6–207 μg/L), boron (B) (LKB: 96–2473 μg/L and SPB: 507–4359 μg/L), manganese (Mn) (LKB: 0.6–7259 μg/L) and salinity (LKB: 125–11740 μS/cm) were observed in water compared to the WHO limit and is a serious concern about the GW quality for human consumption. The mineralization of GW is governing by the dissolution and exchange process of bases and anthropogenic generated solids and liquids effects the surface water quality in LKB as well as river bank communities. The spatial distribution of As was attributed to the geology of both the basins and the heterogeneously distributed evaporites in the sediments. The concentrations of As are found in alluvial sediments in northern region of LKB and “PACK belt” (an approximately 25 km long belt stretching along the southern shores of the Lake Poopó, between the villages of Pampa Aullagas and Condo K) in SPB, where iron (Fe) and aluminum (Al) oxides as well as hydroxides are the most predominant mineral phases as potential sorbents of As.
Geochemical mechanisms of natural arsenic mobility in the hydrogeologic system of Lower Katari Basin, Bolivian Altiplano
(Elsevier BV, 2020) Israel Quino Lima; Oswaldo Eduardo Ramos Ramos; Mauricio Ormachea; María Isabel Chambi Tapia; Jorge Quintanilla Aguirre; Ahmad Arslan; Jyoti Prakash Maity; Md. Tahmidul Islam; Prosun Bhattacharya
Hydrogeochemical contrasts in the shallow aquifer systems of the Lower Katari Basin and Southern Poopó Basin, Bolivian Altiplano
(Elsevier BV, 2020) Israel Quino Lima; Mauricio Ormachea; Oswaldo Eduardo Ramos Ramos; Jorge Quintanilla Aguirre; Jyoti Prakash Maity; Ahmad Arslan; Prosun Bhattacharya
Drinking water sources in the southeastern part of Lake Titicaca (Lower Katari Basin: LKB) and the southern part of Lake Poopó (Southern Poopó Basin: SPB) have high concentrations of arsenic (As), >10 μg/L compared to the WHO and NB-512 guideline value. These regions belong to the Bolivian Altiplano and are characterized by a semiarid climate, slow hydrological flow, with geological formations of volcanic origin, in addition to brines and other mineral deposits. The present study is focused on comparing the geochemical processes of As in relation to the sources and mobilization in groundwater (GW) in LKB and SPB. Groundwater (GW), surface water (SW) and sediment samples were collected from both basins. The As (LKB: 0.8–288 μg/L and SPB: 2.6–207 μg/L), boron (B) (LKB: 96–2473 μg/L and SPB: 507–4359 μg/L), manganese (Mn) (LKB: 0.6–7259 μg/L) and salinity (LKB: 125–11740 μS/cm) were found to be higher than the WHO guideline values, which is a serious concern about the GW quality for human consumption. The dissolution and exchange of bases are the processes that govern the mineralization of GW. Load of solids and liquids of anthropogenic origin in surface water (LKB) represents an environmental problem for communities on river banks. The spatial distribution of As was attributed to the geology of both the basins and the heterogeneously distributed evaporites in the sediments. The highest As concentrations are found in alluvial sediments of the northern region of LKB and “PACK belt” (an approximately 25 km long belt stretching along the southern shores of the Lake Poopó, between the villages of Pampa Aullagas and Condo K) in SPB. Sequential extraction of sediment and mineral saturation indices indicate that iron (Fe) and aluminum (Al) oxides as well as hydroxides are the most predominant mineral phases as potential sorbents of As.
Spatial dependency of arsenic, antimony, boron and other trace elements in the shallow groundwater systems of the Lower Katari Basin, Bolivian Altiplano
(Elsevier BV, 2020) Israel Quino Lima; Oswaldo Ramos Ramos; Mauricio Ormachea; Jorge Quintanilla Aguirre; Céline Duwig; Jyoti Prakash Maity; Ondra Šráček; Prosun Bhattacharya
Trace Elements in Soils, Their Uptake by Crops and Potential Health Risks: Insights From a Legacy Mining Area in Oruro, Bolivian Altiplano
(2025) Oswaldo Eduardo Ramos Ramos; María Isabel Chambi Tapia; Israel Quino Lima; Tobías S. Rötting; Vladimir Orsag; Lourdes Chambi; Ondra Šráček; Jorge Quintanilla Aguirre; Jyoti Prakash Maity; Ahmad Arslan
A geochemical study was conducted in the legacy mining area in Oruro, the Bolivian Altiplano to examine the distribution of trace elements (TEs) in agricultural soils and their uptake by crops. The pseudo-total, bioavailable fractions of TE and sequential extraction fraction of As contents were determined in soils. The pseudo-total concentration of TEs in soils suggests naturally elevated background levels. The strong correlation (p < 0.01) between Feregia/Mnregia-Asregia, Curegia, and Znregia suggests that secondary iron oxides play a key role in adsorbing these TEs. Species linked to carbonates are also present, but negative (r = -0.51; p < 0.01) correlation between soil pH and AsDTPA suggests that the retention of TEs in carbonate is not dominant. The chelate diethylene-triamine-pentaacetic acid (DTPA) method extracted less than 2% of total As, whereas sequential fractionation reported up to 12% as potentially mobilized (F1–non-specifically-bound + F2–specifically-bound), posing a risk of transfer to crops or groundwater. As, Cd and Pb tend to accumulate in soils by binding to amorphous and crystalline Fe oxide surfaces. Arsenic levels in beans and alfalfa (0.19 mg/kg), barley (0.17 mg/kg), and peeled potatoes (0.11 mg/kg), Cd levels in beans (0.03 mg/kg), alfalfa (0.017 mg/kg), barley (0.012 mg/kg), and peeled potatoes (0.023 mg/kg), remained within Chilean, FAO, WHO, and European regulatory limits. However, Pb concentrations exceeded permissible limits in beans (0.32 mg/kg), and alfalfa (0.22 mg/kg); however peeled potatoes (0.16 mg/kg) and barley (0.16 mg/kg) remained below the threshold of European guidelines.