Groundwater Contamination by Hazardous Wastes

Hasan, Mohd Abul; Ahmad, Shamsad; Mohammed, Tariq Hasan

doi:10.1007/s13369-021-05452-7

Cited by 14 publications

(6 citation statements)

References 107 publications

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“…As anthropogenic contaminants in groundwater are transported from diversified sources, those mobile ones tend to be more frequently detected. Thus, anionic metals (e.g., Cr 2 O 7 2– , AsO 3 3– /AsO 4 3– , SeO 4 2– ), nonaqueous phase liquid (e.g., chlorinated solvents, petroleum), and soluble organic compounds (e.g., hydrocarbons, phenolic compounds) are the main anthropogenic contaminants, particularly in contaminated sites . Transport, transformation, and mitigation of anthropogenic contaminants in aquifers have been intensively investigated.…”

Section: Exposure To Critical Substances From Groundwater Dischargementioning

confidence: 99%

Groundwater Quality and Health: Making the Invisible Visible

Wang

Yuan

Shi

et al. 2023

Environ. Sci. Technol.

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Linking groundwater quality to health will make the invisible groundwater visible, but there are knowledge gaps to understand the linkage which requires cross-disciplinary convergent research. The substances in groundwater that are critical to health can be classified into five types according to the sources and characteristics: geogenic substances, biogenic elements, anthropogenic contaminants, emerging contaminants, and pathogens. The most intriguing questions are related to quantitative assessment of human health and ecological risks of exposure to the critical substances via natural or induced artificial groundwater discharge: What is the list of critical substances released from discharging groundwater, and what are the pathways of the receptors' exposure to the critical substances? How to quantify the flux of critical substances during groundwater discharge? What procedures can we follow to assess human health and ecological risks of groundwater discharge? Answering these questions is fundamental for humans to deal with the challenges of water security and health risks related to groundwater quality. This perspective provides recent progresses, knowledge gaps, and future trends in understanding the linkage between groundwater quality and health.

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Section: Exposure To Critical Substances From Groundwater Dischargementioning

confidence: 99%

Groundwater Quality and Health: Making the Invisible Visible

Wang

Yuan

Shi

et al. 2023

Environ. Sci. Technol.

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“…Recharge water in the dump's surroundings is a source of contaminant transport within the vadose zone to the aquifer [19]. The greater the recharge, the more vulnerable the groundwater [51]. Given the small area analyzed in this study, data used according to Momade et al [38] and Vicente [36] estimates the value of groundwater recharge in Maputo city between 165 and 185 mm/year for the entire Hulene-B dump surrounding area.…”

Section: Net Recharge (R)mentioning

confidence: 99%

Integration of Electrical Resistivity and Modified DRASTIC Model to Assess Groundwater Vulnerability in the Surrounding Area of Hulene-B Waste Dump, Maputo, Mozambique

Bernardo

Candeias

Rocha

2022

Water

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In this study, electrical resistivity was applied in six 400 m profiles around the Hulene-B waste dump (Mozambique). Afterwards, an inversion was performed by RES2Dinv. The use of the electrical resistivity method allowed us to characterize in detail some underlying aspects of the DRASTIC index by identifying anomalous zones considered to be permeable and prone to leachate migration. The modified DRASTIC index revealed high values in areas near contaminated surface groundwater and surface layers of the vadose zone, characterized by low resistivities. Areas with lower index results were characterized by high resistivity on surface layers and high depth at which groundwater was detected. The overall modified DRASTIC index result revealed medium vulnerability. However, high vulnerability index values were detected in areas with higher surface elevation, suggesting groundwater contamination by horizontal dilution of leachates from the surrounding area of the Hulene-B waste dump.

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“…In this research pollutant concentration is considered in both liquid and solid phase and implicit Crank-Nicolson approach is adopted as numerical method. The detailed overview of all possible categories of hazardous waste are listed in [13]. This research article also reviews and updates all the latest analytic and numerical techniques and different available software(s) to study the novel geographical pollutant transport problems as well.…”

Section: Introductionmentioning

confidence: 99%

Pollutant transport in a homogenous aquifer with plate stacks

Kubra,

Lehre,

McKibbin

et al. 2024

Preprint

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This study aims at investigating the numerical analysis of pollutant transport in homogenous porous media in the presence of plate stacks. The investigation is performed for solid objects of the same size placed in an inline arrangement in a homogenous porous media. The pollutant transport equation (i.e., steady-state and time-dependent advection-diispersion) is chosen in mathematical modeling. Furthermore, on basis of dispersion coefficient, three more cases arise which include uniformly constant, dependence on the magnitude of velocity, and dependence on both magnitude of velocity and its direction. Such models have a wide range of applications. Generally, the analytical solution of such problems doesn’t exist, so all the work is done numerically. The governing partial differential equation of pollutant concentration is approximated by using finite difference technique. Central and one-sided finite difference formulae are used to discretize the domain. MATLAB software is used to compute approximations to velocity potential and stream function. Then equipotential lines and streamlines are visualized in form of contours. Both, velocity potential and stream function satisfy Laplace’s equation and they are harmonic. Fluid flow lines and pollutant concentration are represented graphically for various parameters involved. It is observed that the size, shape, and position of pervious objects, entrance length of the domain affect fluid flow and pollutant transport. However, there is no significant effect of heated objects on pollutant transport. Moreover, advection and dispersion depend upon the permeability of porous media and the properties of the solid matrix.

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Groundwater Contamination by Hazardous Wastes

Cited by 14 publications

References 107 publications

Groundwater Quality and Health: Making the Invisible Visible

Groundwater Quality and Health: Making the Invisible Visible

Integration of Electrical Resistivity and Modified DRASTIC Model to Assess Groundwater Vulnerability in the Surrounding Area of Hulene-B Waste Dump, Maputo, Mozambique

Pollutant transport in a homogenous aquifer with plate stacks

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