Assessment of landfill leachate in semi-arid climate and its impact on the groundwater quality case study: Hamedan, Iran

Vahabian, Mehdi; Hassanzadeh, Yousef; Marofi, Safar

doi:10.1007/s10661-019-7215-8

Cited by 52 publications

(14 citation statements)

References 44 publications

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“…Four factors were extracted to represent the main factors for groundwater quality, and to identify the different pollution sources. The first factor, with the principal components of total hardness, Cl − and TDS (greater than 0.900) and the secondary components of SO 4 2− , Pb and Mn (ranging from 0.500 to 0.900), contributed approximately 49.181% to the groundwater quality, indicating that most of the groundwater pollution in this study area resulted from the leachate leakage of the MSW landfill, similar to the substantial studies that demonstrated that the main influential groundwater pollutants from landfills included Cl − , SO 4 2− , total hardness, TDS and trace metals [34][35][36][37][38]. The TDS of this landfill was mainly determined by Cl − and SO 4 2− ; therefore, Cl − was very mobile and generally constituted nonreactive tracers, as seen in Figure 6e [18], and SO 4 2− underwent far-reaching biochemical transformations [19].…”

Section: Factor Analysissupporting

confidence: 73%

Assessment of Shallow Groundwater Contamination Resulting from a Municipal Solid Waste Landfill—A Case Study in Lianyungang, China

Chen

Sun

et al. 2019

Water

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Groundwater contaminations based on the release and transportation of leachate from municipal solid waste (MSW) landfills are a potential hazard to the ecosystem and its inhabitants. In this study, nine chemical compositions of groundwater quality were collected and analysed from 16 monitoring wells and two ponds around the Diaoyushan MSW landfill in the north of Jiangsu Province, China. Multiple analyses were performed to assess the redox conditions and the groundwater environment. It was indicated that the landfill was in a low and stable biodegradability phase, and the most influential phase was the initial stage of the landfill site; the leachate leakage was the principal pollution source (49.18%) for the local groundwater environment. Artificial drainage of Dongdasha village expanded the contaminant plume scopes and deteriorated water quality further. The polluted groundwater area was provided with high concentrations of total hardness, Cl−, SO42−, total dissolved solids (TDS) and Pb.

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Section: Factor Analysissupporting

confidence: 73%

Assessment of Shallow Groundwater Contamination Resulting from a Municipal Solid Waste Landfill—A Case Study in Lianyungang, China

Chen

Sun

et al. 2019

Water

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“…Most previous studies on leachate characterization focused on the TDS concentration. Very few studies considered the concentration of TSS, TVS, TFS, and TS (Mor et al 2018;Hussein et al 2019;Vahabian et al 2019). The current study revealed that the TDS values in all samples exceeded the disposal limits (i.e., 2,000 mg/L) (MECA 1993, Table 5).…”

Section: Solids Analysismentioning

confidence: 56%

“…Pearson correlation analysis was conducted to determine the casualty relationship and degree of association among the measured contaminant levels present in the leachate. The correlation coefficient (r) value of r.0.7, 0.5,r,0.7, and ,0.5, denoted strong, moderate, and weak correlation, respectively (Maiti et al 2016;Vahabian et al 2019). The analysis was conducted using Microsoft ® Excel Software (Version 2016).…”

Section: Discussionmentioning

confidence: 99%

Characterization and pollution potential of leachate from urban landfills during dry and wet periods in arid regions

et al. 2021

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Leachate originating from municipal solid waste landfills poses a serious contamination threat to public health. The study performed a bio-physicochemical characterization of leachate from two landfills in Oman, i.e., Multaqa landfill leachate (MLL) and Barka landfill leachate (BLL) before and after rainfall. Samples were characterized for ninety-two (92) parameters. Additionally, the leachate pollution index (LPI) was estimated to assess. The study found a high value of the leachate parameters without any rainfall incidents. Pearson correlations (±ve) have to be seen more than 90% in all cases, which is a strong association (r>0.75) for the measured parameters in both MLL and BLL. Rainfall significantly reduced the concentrations of organic contaminants and solids in leachate due to dilution. The study revealed about 18–29% and 14–28% reductions in the LPI sub-index for organic and inorganic contaminants, respectively, after the rainfall. The overall LPI values were higher compared to similar findings from the literature. Such deviations could be attributed to the unsegregated nature of solid wastes, resulting in the formation of contaminants or from the disposal of a high volume of solid wastes in a smaller area. Therefore, the study recommends efficient management strategies of landfills to reduce potential leachate groundwater contamination.

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“…The physical-chemical characteristics of the leachate are highly variable throughout the life of the landfills (Naveen et al, 2017). The characteristics of the deposited residues, the age of the landfill and the climatic conditions of the place have a significant effect on its composition (Kawai et al, 2012;Tałałaj et al, 2016;Mishra et al, 2018;Vahabian et al, 2019).…”

Section: Methodsmentioning

confidence: 99%

The study of diffusion characteristics of soil bentonite to control contaminant transport

Mahallei

Badv

2021

WJE

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Purpose The purpose of this paper is to assess sand-bentonite liners (SBL) which could be used as hydraulic barriers with a controllable quality, relatively low cost and easy operation in solid waste landfills. Design/methodology/approach These barriers have been used successfully in various applications and have attracted much attention in a short period of time. The only precautionary use of SBLs is related to the change of their hydraulic properties in high alkaline chemical environments. The main reason for this phenomenon is the presence of high ion exchange minerals in bentonite. By exposure to these environments, it is also laid open to degradation of the montmorillonite microstructure leads to change in hydraulic behavior. Three different compounds were used for laboratory-scale SBL, and diffusion was considered as the dominant mechanism of contamination transmission in these liners. Chlorine ion has been used as pollutant, and its diffusion coefficient was determined in the tested SBLs. Findings The sample’s diffusion coefficient for the first experiment containing 3% bentonite and 97% Semnan sand were 2.5 × 10^(−9) (m^2/s) and 2.44 × 10 ^(−9) (m^2/s), respectively. Similarly, for two samples with 6% bentonite and 94% Semnan sand, this parameter was equal to 2.17 × 10 ^(−9) (m^2/s) and 2.22 × 10 ^(−9) (m^2/s) and for two samples with 3% agglacial clay, 12% bentonite and 85% Semnan sand was 5.55 × 10 ^(−10) (m^2/s) and 6.11 × 10 ^(−10) (m^2/s). These values correspond to the range reported in previous studies. Also, it was observed that with comparing the diffusion coefficients of test, it was concluded that with increasing bentonite, the molecular diffusion decreases significantly. Originality/value In this study, three laboratory samples with different percentages of bentonite, clay and sand were considered and the results obtained from the laboratory were compared with the results obtained from numerical modeling.

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Assessment of landfill leachate in semi-arid climate and its impact on the groundwater quality case study: Hamedan, Iran

Cited by 52 publications

References 44 publications

Assessment of Shallow Groundwater Contamination Resulting from a Municipal Solid Waste Landfill—A Case Study in Lianyungang, China

Assessment of Shallow Groundwater Contamination Resulting from a Municipal Solid Waste Landfill—A Case Study in Lianyungang, China

Characterization and pollution potential of leachate from urban landfills during dry and wet periods in arid regions

The study of diffusion characteristics of soil bentonite to control contaminant transport

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