Surface and groundwater quality assessment and identification of hydrochemical characteristics of a south-western coastal area of Bangladesh

Ahmed, Ashek; Ghosh, Prosun Kumar; Hasan, Mahmudul; Rahman, Arifur

doi:10.1007/s10661-020-8227-0

Cited by 45 publications

(9 citation statements)

References 14 publications

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“…NO 3 − -N pollution is one of the most common and prominent problems of karst groundwater worldwide. Previous studies on NO 3 − -N in water in France (karstic Cretaceous chalk aquifer in Paris) [40], the United States (Edwards karst aquifer, central Texas) [41,42], South Korea [43], Bangladesh [44], China (Houzhai watershed and Guiyang watershed, Guizhou Province) [4,45,46], and other regions also found high nitrate (NO 3 − -N) concentrations in karst areas, especially in agricultural areas. Nitrogen is often found to be transported to groundwater in the form of dissolved nitrate (NO 3 − -N) due to its high solubility and mobility characteristics, while phosphorus is easily retained in soil due to its affinity to particulate matter.…”

Section: Nitrogen and Phosphorus Pollution Of Water In Karst Areasmentioning

confidence: 99%

“…At present, many techniques such as stable isotopes have been used to estimate the pollution of nitrogen and phosphorus in karst water [49]. Related studies have been carried out in the region and similar geological areas [18,19,44]. Based on field monitoring sampling, combined with various techniques such as isotope tracing and model simulation, quantitative analysis is the future research direction of nitrogen and phosphorus migration in karst wetland water ecosystems.…”

Section: Nitrogen and Phosphorus Pollution Of Water In Karst Areasmentioning

confidence: 99%

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Spatial and Temporal Variations of Nitrogen and Phosphorus in Surface Water and Groundwater of Mudong River Watershed in Huixian Karst Wetland, Southwest China

Pan

Dai

et al. 2021

Sustainability

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When considering the factors affecting the spatial and temporal variation of nitrogen and phosphorus in karst watersheds, the unique karst hydrogeology as an internal influencing factor cannot be ignored, as well as natural factors such as meteorological hydrology and external factors such as human activities. A watershed-scale field investigation was completed to statistically analyze spatial and temporal dynamics of nitrogen and phosphorus through the regular monitoring and collection of surface water and shallow groundwater in the agricultural-dominated Mudong River watershed in the Huixian Karst Wetland over one year (May 2020 to April 2021). Our research found that non-point source pollution of nitrogen (84.5% of 239 samples TN > 1.0 mg/L) was more serious than phosphorus (7.5% of 239 samples TP > 0.2 mg/L) in the study area, and shallow groundwater nitrogen pollution (98.3% of 118 samples TN > 1.0 mg/L) was more serious than surface water (68.6% of 121 samples TN > 1.0 mg/L). In the three regions with different hydrodynamic features, the TN concentration was higher and dominated by NO3−-N in the river in the northern recharge area, while the concentrations of TN and TP were the highest in shallow groundwater wells in the central wetland core area and increased along the surface water flow direction in the western discharge area. This research will help improve the knowledge about the influence of karst hydrodynamic features on the spatial patterns of nitrogen and phosphorus in water, paying attention to the quality protection and security of water in karst areas with a fragile water ecological environment.

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Section: Nitrogen and Phosphorus Pollution Of Water In Karst Areasmentioning

confidence: 99%

Section: Nitrogen and Phosphorus Pollution Of Water In Karst Areasmentioning

confidence: 99%

Spatial and Temporal Variations of Nitrogen and Phosphorus in Surface Water and Groundwater of Mudong River Watershed in Huixian Karst Wetland, Southwest China

Pan

Dai

et al. 2021

Sustainability

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“…The NICA-Donnan model is a combination of the non-ideal competitive adsorption isotherm (NICA), which describes the binding of heterogeneous material, and a Donnan electrostatic sub-model, which describe the electrostatic interactions between ions and humic material (Milne et al, 2003). Two model solutions, Solution A and Solution B, were created based on the chemistry of rice-growing soils in south-western Bangladesh; since rice is cultivated in flooded soils and groundwater is used for irrigation, the composition of soil solutions was assumed to be closely related to that of the groundwater (Ahmed et al, 2020;Ayers et al, 2016;Bahar and Reza, 2010;Hug et al, 2008). Rice-growing soils were selected for study because of the importance of zinc biofortication of rice (high prevalence of zinc deficiency of South Asian populations for whom rice is a staple food) and the proposed role for both LMWOAs and siderophores during zinc cycling in the rhizosphere of rice plants.…”

Section: Speciation Modellingmentioning

confidence: 99%

The Control of pH and Ionic Strength Gradients on the Interaction of Low-Molecular-Weight Organic Acids and Siderophores

Northover

Mao²,

Hanif³

et al. 2021

Preprint

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<div>A wide range of organic ligands are found in the rhizosphere. Two important groups are low-molecular-weight organic acids (LMWOAs) and siderophores. We know that LMWOAs and siderophores coexist in the rhizosphere and it has been proposed that they interact, but it is not clear what controls this. Such knowledge gaps undermine biofortification efforts. In this study test the hypothesis that pH and ionic strength gradients make it possible for LMWOAs and siderophores to function synergistically during micronutrient cycling in the rhizosphere.</div>

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“…Multiple studies in Bangladesh have geochemically examined tidally dominated rivers (hereafter called tidal channels) and adjacent waterways in both temporal and spatial ways (e.g., [ 2 , 3 , 24 , 33 , 59 , 63 ]). Studies have also looked at trace element concentrations in aquaculture ponds near the coastal region of Bangladesh [ 23 , 32 , 62 ] or in coastal Bangladesh rivers [ 36 , 52 ] and nonspecified lakes/ponds [ 1 ]. However, these studies have focused more on risk assessment, general reporting of trace element or major element concentrations, and overall water quality.…”

Section: Introductionmentioning

confidence: 99%

Influences on tidal channel and aquaculture shrimp pond water chemical composition in Southwest Bangladesh

Dietrich

Ayers

2021

Geochem Trans

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Detailed geochemical studies of both major and minor elements in Bangladesh surface waters are sparse, particularly in shrimp aquaculture pond environments. Therefore, water samples from shrimp aquaculture ponds and tidal channels were collected in high precipitation (July) and low precipitation (May) months from 2018–2019 in Southwest Bangladesh and analyzed for complete water chemistry. Selenium (Se) and arsenic (As) were elevated above WHO guidelines in 50% and ~ 87% of samples, respectively, but do not show any recognizable spatial patterns. Shrimp pond and tidal channel water compositions in the dry season (May) are similar, illustrating their connectivity and minimal endogenous effects within shrimp ponds. Tidal channels are less saline in July than shrimp ponds still irrigated by tidal channels, suggesting that either farmers limit irrigation to continue farming saltwater shrimp, or the irrigation flux is low and leads to a lag in aquaculture-tidal channel compositional homogenization. δ18O and δ2H isotopic compositions from samples in May of 2019 reveal tidal channel samples are closer to the local meteoric water line (LMWL) than shrimp pond samples, because of less evaporation. However, evaporation in May shrimp ponds has a minimal effect on water composition, likely because of regular drainage/exchange of pond waters. Dissolved organic carbon (DOC) is positively correlated with both δ18O and δ2H in shrimp ponds, suggesting that as evaporation increases, DOC becomes enriched. Multiple linear regression reveals that As and Se can be moderately predicted (adjusted R2 values between 0.4 and 0.7, p < 0.01) in surface waters of our study with only 3–4 independent predictor variables (e.g., Ni, V and DOC for Se prediction; Cu, V, Ni and P for As prediction). Thus, this general approach should be followed in other regions throughout the world when measurements for certain hazardous trace elements such as Se and As may be lacking in several samples from a dataset.

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Surface and groundwater quality assessment and identification of hydrochemical characteristics of a south-western coastal area of Bangladesh

Cited by 45 publications

References 14 publications

Spatial and Temporal Variations of Nitrogen and Phosphorus in Surface Water and Groundwater of Mudong River Watershed in Huixian Karst Wetland, Southwest China

Spatial and Temporal Variations of Nitrogen and Phosphorus in Surface Water and Groundwater of Mudong River Watershed in Huixian Karst Wetland, Southwest China

The Control of pH and Ionic Strength Gradients on the Interaction of Low-Molecular-Weight Organic Acids and Siderophores

Influences on tidal channel and aquaculture shrimp pond water chemical composition in Southwest Bangladesh

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