Arsenic geochemistry of the sediments of the shallow aquifer and its correlation with the groundwater, Rangpur, Bangladesh

Saha, Sudip; Reza, A.; Roy, Mahua

doi:10.1007/s13201-021-01495-1

Cited by 12 publications

(3 citation statements)

References 43 publications

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“…THQ and HI values > 1 indicate a risk of developing non-carcinogenic effects over a lifetime [ 35 ].

where MC = mean metal concentration, IR = acceptable ingestion rate (0.34 kg/person/day), EF = exposure frequency (365 days/year), ED = exposure duration (74.8 years, which is the expected average lifetime), BW = average body weight (60 kg for an adult), AT = average exposure time for non-carcinogenic element ( EF × ED ), and ADAF = age-dependent adjustment factor (adult:1) [ 36 ]. The value of

for Pb is 33% and for As is 75% [ 37 ].…”

Section: Methodsmentioning

confidence: 99%

Human Health Risk Assessment for Exposure to Heavy Metals via Dietary Intake of Rainbow Trout in the Influence Area of a Smelting Facility Located in Peru

Peñaloza,

Custodio,

Cacciuttolo

et al. 2023

Toxics

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Abandoned mining–metallurgical sites can significantly impact the environment and human health by accumulating heavy metals in aquatic ecosystems. The water in the sub-basin near an abandoned smelting facility in the city of La Oroya, Peru, is primarily used for pisciculture. The objective of this study was to assess the risk to human health from exposure to heavy metals via dietary intake of rainbow trout (Oncorhynchus mykiss) in the influence area of a smelting facility located in the central Andean region of Peru. The bioconcentration factor, biosediment accumulation factor, and consumption risks were evaluated using the Monte Carlo method. The results showed that the concentrations of elements (Zn > Pb > Cu > As) in rainbow trout muscle did not exceed the maximum limit (ML). However, the water significantly exceeded the ML for Pb in all sectors and As in the lower and middle parts of the river. The concentration of Pb in sediments also significantly exceeded the ML in the upper and lower parts of the river. Consequently, rainbow trout consumption in the study area presents risks to human health due to the bioaccumulation of heavy metals, with a 1.27% carcinogenic risk in samples from the lower part of the river.

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“…THQ and HI values > 1 indicate a risk of developing non-carcinogenic effects over a lifetime [ 35 ].

for Pb is 33% and for As is 75% [ 37 ].…”

Section: Methodsmentioning

confidence: 99%

Human Health Risk Assessment for Exposure to Heavy Metals via Dietary Intake of Rainbow Trout in the Influence Area of a Smelting Facility Located in Peru

Peñaloza,

Custodio,

Cacciuttolo

et al. 2023

Toxics

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“…The main forms of arsenic in sediments are As(V) and As(III), and their transformation and release are influenced by dissolution, ion exchange, desorption, and redox reactions. These processes are closely related to the anaerobic environment of sediments and corresponding acidity or alkalinity [7,8], with pH and dissolved oxygen (DO) being recognized as key factors that control arsenic migration at the sediment-water interface. In recent years, the increasing rate of total arsenic concentration in lake waters has attracted public attention [9].…”

Section: Introductionmentioning

confidence: 99%

The Effects and Mechanisms of pH and Dissolved Oxygen Conditions on the Release of Arsenic at the Sediment–Water Interface in Taihu Lake

Zeng,

Yan,

Yang

et al. 2023

Toxics

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The pH and dissolved oxygen (DO) conditions are important environmental factors that control the migration of arsenic (As) at the sediment–water interface. This study investigates the distribution differences of reactive iron, manganese, and arsenic at the sediment–water interface under anaerobic and aerobic conditions at different pH levels. The strong buffering capacity of sediment to water pH results in a shift towards neutral pH values in the overlying water under different initial pH conditions. The level of DO becomes a key factor in the release of As from sediment, with lower DO environments exhibiting higher release quantities and rates of As compared to high DO environments. Under low DO conditions, the combined effects of ion exchange and anaerobic reduction lead to the most significant release of As, particularly under pH 9.5 conditions. The formation of amorphous ferrous sulfide compounds under low DO conditions is a significant factor contributing to increased arsenic concentration in the interstitial water. Therefore, the re-migration of endogenous arsenic in shallow lake sediments should consider the combined effects of multiple driving forces.

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“…Despite the consistently higher presence of As in organic-rich silt and clay sediments in the Bengal basin [4,11,[23][24][25][26], relatively few studies focused on the effects of clay/phyllosilicate minerals on the solid-phase partitioning of As in the shallow aquifers of Bangladesh. These finer-grained sediments often contain abundant organic matter (OM) with an affinity for strongly adsorbing As [21,22,[27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Mineralogical Associations of Sedimentary Arsenic within a Contaminated Aquifer Determined through Thermal Treatment and Spectroscopy

et al. 2023

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Sedimentary arsenic (As) in the shallow aquifers of Bangladesh is enriched in finer-grained deposits that are rich in organic matter (OM), clays, and iron (Fe)-oxides. In Bangladesh, sediment color is a useful indicator of pore water As concentrations. The pore waters of orange sediments are usually associated with lower As concentrations (<50 µg/L) owing to abundant Fe-oxides which sorb As. Using this color signal as a guide, spectroscopic measurements alongside thermal treatment were extensively utilized for analyzing the properties of both Fe-oxides and clay minerals. This study uses Fourier transform infrared (FTIR) and diffuse reflectance (DR) measurements along with thermal treatment to evaluate the solid-phase associations of As from sediment collected along the Meghna River in Bangladesh. The samples analyzed in this study were chosen to represent the various lithologies present at the study site and included riverbank sands (1 m depth), silt (6 m depth), aquifer sand (23 m depth), and a clay aquitard (37 m depth). The concentrations of sedimentary As and Fe were measured by X-ray fluorescence, and the spectroscopic measurements were taken on the samples prior to the thermal treatment. For the thermal treatment, sediment samples were placed in a preheated furnace at 600 °C for 3 h. The thermal treatment caused a deepening of reddish-brown hues in all samples, and the greatest change in color was observed in the finer-grained samples. The FTIR spectral analysis revealed that the clay minerals were composed primarily of illite, smectite, and kaolinite. The DR results indicate that the majority of Fe in sands was present as goethite; however, in the clay and silt samples, Fe was incorporated into the structure of clay minerals as Fe(II). The amount of structural Fe(II) was strongly positively correlated with the sedimentary As concentrations, which were highest in the finer-grained samples. After thermal treatment, the concentrations of As in the finer-grained samples decreased by an average of 40%, whereas the change in the As concentrations of the sand samples was negligible. These findings indicate that significant proportions of solid-phase As may be retained by OM and Fe(II)-bearing clay minerals.

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Arsenic geochemistry of the sediments of the shallow aquifer and its correlation with the groundwater, Rangpur, Bangladesh

Cited by 12 publications

References 43 publications

Human Health Risk Assessment for Exposure to Heavy Metals via Dietary Intake of Rainbow Trout in the Influence Area of a Smelting Facility Located in Peru

Human Health Risk Assessment for Exposure to Heavy Metals via Dietary Intake of Rainbow Trout in the Influence Area of a Smelting Facility Located in Peru

The Effects and Mechanisms of pH and Dissolved Oxygen Conditions on the Release of Arsenic at the Sediment–Water Interface in Taihu Lake

Mineralogical Associations of Sedimentary Arsenic within a Contaminated Aquifer Determined through Thermal Treatment and Spectroscopy

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