Application of stable isotopes and dissolved ions for monitoring landfill leachate contamination

Lee, Kwang-Sik; Ko, Kyung‐Seok; Kim, Eul Young

doi:10.1007/s10653-019-00427-y

Cited by 20 publications

(29 citation statements)

References 27 publications

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“…It should be noted that the concentrations of Ca 2+ and Mg 2+ in the leachate from 2020 to 2021 were in the range of 24 to 61 mg/L and 36 to 105 mg/L, respectively, indicating that HCO 3 − in the leachate mainly originated from the significant amounts of dissolved CO 2 produced by the biodegradation of organic waste, rather than carbonate dissolution [ 24 ]. During this period, only HCO 3 − was enriched in the groundwater downstream of the landfill, while Ca 2+ did not increase significantly ( Figure 3 a,b).…”

Section: Discussionmentioning

confidence: 99%

“…Hydro-geochemistry explains the formation of groundwater based quantitative comparison relationships as well as analysis of its element content, ionic balance and changes in hydro-chemical composition during water–rock interactions [ 21 , 22 ]. This method is often combined with multivariate statistics to identify groundwater pollution characteristics based on hydrogeologic investigations [ 23 , 24 , 25 ]. Shi et al [ 26 ] analyzed the chemical types and hydrogeochemical processes of groundwater around Likeng landfill in Guangzhou using a Piper trilinear diagram and expanded Durov diagram, and identified the pollution sources of groundwater around the landfill by principal component analysis.…”

Section: Introductionmentioning

confidence: 99%

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Identification of Groundwater Pollution Characteristics and Health Risk Assessment of a Landfill in a Low Permeability Area

Wang

Song

et al. 2021

IJERPH

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The shallow weathering fissure groundwater in the red-bed area of Southwest China is usually the only drinking water source for most rural residents. In this study, a typical landfill with surrounding residents drinking unpurified groundwater in red-bed area was selected and water quality detection, groundwater numerical simulation and human health risk assessment were used to identify and assess groundwater pollution in the region. The chemical type evolved from HCO3-SO4-Ca-Mg and HCO3-SO4-Ca to Na-Ca-Cl-HCO3 contaminated by the landfill. Na+ and Cl− were selected as factors for rapid identification of groundwater pollution. Subsequent analyses using these factors showed that the leachate pollution plume boundary was 190 m downstream of the landfill. Analysis of the redox conditions revealed that the area from the landfill to 5 m downstream was the reduction zone, while the area beyond 5 m was the oxidation zone. The migration and attenuation patterns of inorganic salts (such as SO42−) and heavy metals (such as Fe and Mn) in the oxidation and reduction zones differed obviously. Meanwhile, the organic pollutants in the leachate were reduced and decomposed into organic acids, which caused the groundwater 80 m downstream of the landfill to become weakly acidic (pH ranged from 6.51 to 6.83), and promoted re-entry of adsorbed heavy metals (such as Pb) into the groundwater. The groundwater risk assessment based on human health revealed that lead, manganese, chlorobenzene, dichloroethane and chloroform constituted a major health threat to the residents. The rank of non-carcinogenic risk was lead >manganese, and the maximum area of non-carcinogenic risk was 15,485 m2. The total carcinogenic risk caused by organic pollutants was 7.9 × 10−6, and the area of the carcinogenic risk zone was 11,414 m2. Overall, the results of this study provide a scientific basis for management of drinking water and groundwater remediation in the red-bed area with low permeability.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Identification of Groundwater Pollution Characteristics and Health Risk Assessment of a Landfill in a Low Permeability Area

Wang

Song

et al. 2021

IJERPH

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“…On the other hand, though acid fermentation and hydrolysis may cause significant reductions in the oxygen concentration in landfills, they may not cause any variation on the δ 18 O isotope content. This is because δ 18 O isotope fractionation is only influenced by phase changes, such as evaporation and condensation, but is unaffected by biogeochemical reactions [25,26]. Since δ 2 H is enriched whilst δ 18 O is unaffected by methanogenesis, this confirms their usefulness in determining leachate infiltration in groundwater bodies.…”

Section: Overview Of Isotope Application In Groundwater Studiesmentioning

confidence: 59%

“…Landfills generate leachate, which contains methane (CH 4 ) and carbon dioxide (CO 2 ) gas, through a process called methanogenesis [23][24][25]. Methanogenesis is a process by which microorganisms (methanogens) utilize organic and inorganic compounds to produce CH 4 and CO 2 under anaerobic conditions [23,26,27].…”

Section: Overview Of Isotope Application In Groundwater Studiesmentioning

confidence: 99%

A Review on the Application of Isotopic Techniques to Trace Groundwater Pollution Sources within Developing Countries

Sankoh

Derkyi

Frazer-Williams

et al. 2021

Water

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Owing to a lack of efficient solid waste management (SWM) systems, groundwater in most developing countries is found to be contaminated and tends to pose significant environmental health risks. This review paper proffers guidelines on the application of isotopic techniques to trace groundwater pollution sources from data spanning from 2010 to 2020 within developing countries. Earlier groundwater studies in those countries were mainly focused on using hydrochemical and geophysical techniques. The limitation of these techniques is that they can only monitor the concentration of pollutants in the water bodies and possible leachate infiltration but cannot determine the specific sources of the pollution. Stable isotopes of δ18O, δ2H and δ13C can confirm leachate migration to water bodies due to methanogenesis. The high tritium in landfill leachates is useful to identify leachate percolation in groundwater. The δ15N technique has been used to distinguish between synthetic and organic nitrogen sources but its application is limited to differentiating between atmospheric vs. inorganic nitrogen sources. The use of a dual isotope of δ15N–NO3− and δ18O–NO3− is beneficial in terms of identifying various sources of nitrogen such as atmospheric and inorganic fertilizers but is yet to be used to differentiate between nitrogen pollution sources from dumpsites, sewage and animal manure. The coupling of the 11B isotope with δ15N–NO3− and δ18O–NO3− and other hydrochemical parameters has proven to be effective in distinguishing between nitrate fertilizer, animal manure, seawater contamination and sewage. Therefore, in areas affected by agricultural activities, landfill leachates, domestic or sewage effluent and seawater intrusion, it is incumbent to couple hydrochemical (Cl−, NO3−, B, DO) and isotope techniques (δ18O, 2H, δ13C, δ18O–NO3−, δ15N–NO3−, δ11B and 3H) to effectively determine pollution sources of groundwater in developing countries. The foregoing review will provide guidelines for studies that may aim to critically distinguish between seawater intrusion, dumpsites, sewage and septic leachates.

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“…Municipal solid waste landfills leachate can cause serious environmental problems for groundwater quality, due to the organic and inorganic pollutants of the leachate plumes [1]. Landfill leachate is defined as a liquid effluent containing contamination materials percolating through deposited waste and released within a landfill [2].…”

Section: Introductionmentioning

confidence: 99%

Application of 2H and 18O Isotopes for Tracing Municipal Solid Waste Landfill Contamination of Groundwater: Two Italian Case Histories

Andrei

Barbieri

Sappa

2021

Water

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Groundwater contamination due to municipal solid waste landfills leachate is a serious environmental threat. During recent years, the use of stable isotopes as environmental tracers to identify groundwater contamination phenomena has found application to environmental engineering. Deuterium (2H) and oxygen (18O) isotopes have successfully used to identify groundwater contamination phenomena if submitted to interactions with municipal solid waste landfills leachate, with a significant organic amount. The paper shows two case studies, in central and southern Italy, where potential contamination phenomenon of groundwater under municipal solid waste landfills occurred. In both cases, isotope compositions referred to 2H and 18O highlight a δ2H enrichment for some groundwater samples taken in wells, located near leachate storage wells. The δ2H enrichment is probably caused by methanogenesis phenomena, during which the bacteria use preferentially the hydrogen “lighter” isotope (1H), and the remaining enriched the “heavier” isotope (2H). The study of the isotope composition variation, combined with the spatial trend of some analytes (Fe, Mn, Ni) concentrations, allowed to identify interaction phenomena between the municipal solid waste landfills leachate and groundwater in both case histories. Therefore, these results confirm the effectiveness of 2H isotopes application as environmental tracer of groundwater contamination phenomena due to mixing with municipal solid waste landfills leachate.

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Application of stable isotopes and dissolved ions for monitoring landfill leachate contamination

Cited by 20 publications

References 27 publications

Identification of Groundwater Pollution Characteristics and Health Risk Assessment of a Landfill in a Low Permeability Area

Identification of Groundwater Pollution Characteristics and Health Risk Assessment of a Landfill in a Low Permeability Area

A Review on the Application of Isotopic Techniques to Trace Groundwater Pollution Sources within Developing Countries

Application of 2H and 18O Isotopes for Tracing Municipal Solid Waste Landfill Contamination of Groundwater: Two Italian Case Histories

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