Assessment of Physicochemical Groundwater Quality and Hydrogeochemical Processes in an Area near a Municipal Landfill Site: A Case Study of the Toluca Valley

Dávalos-Peña, Ingrid; Fuentes-Rivas, Rosa María; de, Reyna María Guadalupe Fonseca-Montes; Ramos-Leal, José Alfredo; Morán-Ramírez, Janete; Alva, Germán Martínez

doi:10.3390/ijerph182111195

Cited by 7 publications

(2 citation statements)

References 43 publications

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“…Dissolved Oxygen (DO) is an important parameter in determining water pollution. The DO recorded was 8.29 mg/L, slightly higher than the WHO range of healthy water (6.0 to 8.0 mg/L) (Dávalos-Peña et al, 2021). The composition of DO is normally low due to a microbial community employing dissolved oxygen for the waste aerobic decomposition.…”

Section: Landfill Leachate Characteristicsmentioning

confidence: 73%

Dibenzofuran Degradation by Bacterial Community in Landfill Leachate

Ahmad,

Hadry Nordin,

Abdullah Sani

et al. 2023

JST

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The contamination of the environment has been a global issue, and bioremediation is proposed as an option to clean up the contamination sites with the promising utilization of bacterial community capabilities. The indigenous bacterial community in the landfill leachate is recognized to carry enzymes for the degradation of contaminants such as dioxin congeners, the dibenzofuran. Environmental factors have been known to influence the process to achieve successful biodegradation, and the optimized conditions may speed up the biodegradation process. Thus, this study was conducted to optimize the substrate availability, temperature, and pH factor for the degradation of dibenzofuran from landfill leachate by the native bacterial community in landfill leachate. This study uses the one-factor at-time (OFAT) approach to measure dibenzofuran degradation. The landfill leachate with enrichment of dibenzofuran (15 to 45 mg L-1) was incubated at temperatures (30°C to 42°C) and pH (5 to 9) for 24 hours before being extracted and analyzed. From the first part of the study, 15 mg L-1 of dibenzofuran, 30°C temperature, and pH 7 have shown the highest dibenzofuran degradation. Later, the optimum condition of dibenzofuran removal (74.40%) was achieved when the landfill leachate was spiked with 15 ppm dibenzofuran at 30°C and pH 7 for 24 hours. This study proposes optimized conditions that give a better result for dibenzofuran degradation, which may enhance bioremediation.

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Section: Landfill Leachate Characteristicsmentioning

confidence: 73%

Dibenzofuran Degradation by Bacterial Community in Landfill Leachate

Ahmad,

Hadry Nordin,

Abdullah Sani

et al. 2023

JST

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“…Groundwater is used to meet the demands of diverse industries when fresh surface water resources are scarce. Contamination of groundwater owing to waste materials has become a major concern due to large-scale industrial expansion [12,13].…”

Section: Introductionmentioning

confidence: 99%

Funnel and Gate Permeable Reactive Barrier Configuration for Contaminated Groundwater Remediation – Designing, Installation, and Modeling: A Review

Mokif,

Faisal

2023

Ecol. Eng. Environ. Technol.

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Groundwater is a valuable resource whose purity is necessary for human survival. It serves as a significant source of water for household, industrial, and agricultural purposes. Traditional groundwater pollution remediation technologies include pump & treat, phase extraction, aeration gas of groundwater, bioremediation, and chemical oxidation. Permeable reactive barrier (PRB) is one of the most key technology being developed as alternatives to the pump and manage method for the remedying contaminated groundwater. An overview on the groundwater significant as important sources for water, sources of groundwater contamination, transport of contaminants, and groundwater remediation technologies have been discussed in this paper. In addition to reactive media, the design and installation of PRBs of funnel-gate configurations and their application as a remediation technique have been covered in this review. Finally reaction mechanisms in groundwater, contaminant transport governing equation, isotherms sorption models, kinetic sorption models, breakthrough curves modeling have been presented in this review. PRB technique provides financial benefits while also encouraging waste material reuse, so contributing to environmental sustainability. Funnel and gate PRB can offer one or more dense treatment areas for maximizing groundwater pollution plume capture. Funnel-gate PRB is characterized by smaller reaction area, ease in replacement and removal during the blocking of the reactive barrier by fine soil particles and reactive sediments.

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Assessing the physicochemical parameters of leachate from biowaste fractions in a laboratory setting, using the elusion method

Likando,

Dornack,

Hamutoko

2023

Environ Earth Sci

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Leachate emissions, which are regarded as one of the primary polluters of groundwater and the environment, are unavoidable side effect of landfill operation. The leachate includes hazardous chemicals, heavy metals, suspended particles, and soluble organic molecules. The objective of this study was to simulate the leachate quality from the biowaste and assess its impact on groundwater pollution in a laboratory setting. For laboratory analysis, a variety of waste fractions that make up the waste composition of household bins in Windhoek were collected and mimicked in the laboratory for analysis. The aim of modeling these scenarios in the laboratory was to examine the quality of the leachate in the eluate when substantial volumes of biowaste were added to the residual samples. The analysis was carried out in accordance with the German Institute for Standardization's (DIN 12457) with respect to the process for sampling strategy and sample preparation. From the laboratory analyses, the values of pH decreased from 6.9 to 4.4 as the biowaste was increasing from 0 to 100 %, while EC was increasing with the increase in biowaste input from 0.6 to 4.99 mS/cm; equally, the concentrations of COD were increasing with the increase of biowaste input from 643 to 24,616 mg/l. These parameters had the strongest influence on the properties of leachate, as the high level of COD indicates the presence of high level of organic strength and a sign of organic pollution. The low or acidic pH values were also as a result of the production of volatile organic acids, which can cause the landfill leachate of such a nature to enhance pH of drinking water and contribute in trihalomethane formation which is a toxic substance for human health. High values of EC on the other hand indicate the discharge or other sources of pollution that has lowered the water body’s relative quality. From the findings, it can be concluded that leachate in this study is biodegradable and un-stabilized, as shown by the low pH levels and high COD concentrations. It also alluded that a change in physicochemical parameters, regardless of how little the concentration is, has the ability to change the quality of groundwater. According to this study, leachate was highly contaminated with organic matters. This has proven that the more biowaste inputs, the higher the concentrations of the physicochemical metrics, which can then alter the quality of groundwater. Hence, a recommendation for organic waste to be diverted from landfill sites or treated before landfilled. The findings from the leachate and groundwater samples of the Kupferberg showed that the landfill is mature methanogenic and stabilized stage, when compared to the pH of the laboratory results. COD values in the leachate samples are way higher than the permissible limit of the Namibian standard guidelines for drinking water, as well as the WHO guidelines. As alluded to by many researchers, high COD concentrations indicate high organic strength and pollution. Just as observed in the laboratory, conductivity is equally high in the leachate samples of the Kupferberg landfill, indicating high salts or dissolved inorganic components. This study can conclusively say that there is a relationship between the observed laboratory results and the actual field results, because of the similar trends they portray, noting that the filed values are always higher than the laboratory values. Hence, a proper correlation method is recommended.

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Assessment of Physicochemical Groundwater Quality and Hydrogeochemical Processes in an Area near a Municipal Landfill Site: A Case Study of the Toluca Valley

Cited by 7 publications

References 43 publications

Dibenzofuran Degradation by Bacterial Community in Landfill Leachate

Dibenzofuran Degradation by Bacterial Community in Landfill Leachate

Funnel and Gate Permeable Reactive Barrier Configuration for Contaminated Groundwater Remediation – Designing, Installation, and Modeling: A Review

Assessing the physicochemical parameters of leachate from biowaste fractions in a laboratory setting, using the elusion method

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