Fate and transport of pollutants through a municipal solid waste landfill leachate in Sri Lanka

Wijesekara, S. S. R. M. D. H. R.; Mayakaduwa, S. S.; Siriwardana, A.R.; Silva, K.M. Nalin de; Basnayake, B. F. A.; Kawamoto, Ken; Vithanage, Meththika

doi:10.1007/s12665-014-3075-2

Cited by 39 publications

(45 citation statements)

References 26 publications

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“…Similar results reporting low BOD concentrations in piezometers located at the landfill site were reported, for instance, by Ngang and Agbazue [15], Bandara and Hettiaratchi [39], and Sugirtharan and Rajendran [40]. As opposed to these examples, incomparably higher values of BOD were recorded at a municipal solid waste landfill site in Sri Lanka (BOD = 3590 mg O 2 /L) [41].…”

Section: Pollution Level In Groundwater Due To Localization Of Piezomsupporting

confidence: 84%

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Levels of Organic Pollution Indicators in Groundwater at the Old Landfill and Waste Management Site

2017

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Abstract:The aim of this paper was to assess groundwater quality in a landfill and waste management site, with special regard to levels of organic pollution indicators: chemical oxygen demand (COD), biochemical oxygen demand (BOD), and total organic carbon (TOC). Analysis of specific indicators was conducted for piezometers located in the area of the Radiowo landfill, the composting plant and the facilities adjacent to the landfill. The article discusses the temporal and spatial changes of selected organic pollution indicators. Based on the results of groundwater monitoring, several maps of COD, BOD and TOC areal distribution were provided. Statistical distribution of monitoring data was presented using box-and-whisker plots. Pearson's correlation coefficients between selected pollution indicators were measured with a significance level set at p < 0.01 and p < 0.05. The strongest correlation was observed between BOD and COD. The maximum BOD/COD ratio was observed at the level of 1.561 before the closure of the vertical barrier, whereas, at present, average values of this ratio are below 0.18. The results indicate significant improvement of groundwater quality in the landfill site after the closure of the vertical barrier. In particular, this refers to BOD values, which decreased even 160 times in the 1998-2016 monitoring period.

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Section: Pollution Level In Groundwater Due To Localization Of Piezomsupporting

confidence: 84%

“…As opposed to these examples, incomparably higher values of BOD were recorded at a municipal solid waste landfill site in Sri Lanka (BOD = 3590 mg O2/L) [41].…”

Section: Pollution Level In Groundwater Due To Localization Of Piezommentioning

confidence: 61%

Levels of Organic Pollution Indicators in Groundwater at the Old Landfill and Waste Management Site

2017

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“…It is in agreement with literature that the heavy metals are present in trace concentrations in municipal landfill leachate (Christensen et al, 2001). Two reasons may be given for the relatively low enrichment of heavy metals, firstly, the industrial solid waste in Shanghai was treated separately, the MSW generally contained minor amounts of heavy metals and its RW was often characterized by low heavy metal concentrations (Wijesekara et al, 2014). In addition, only part of the heavy metals transferred to the RW through precipitation, ion exchange or sorption from the MSW (Christensen et al, 2001).…”

Section: Heavy Metals and Oil In Rwsupporting

confidence: 90%

Characteristics and risks of secondary pollutants generation during compression and transfer of municipal solid waste in Shanghai

et al. 2015

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“…This unprotected dumpsite with no leachate treatment facilities and no proper lining to prevent leachate flux into the river poses a major threat to the environment and to the end users of this fresh water source. [13,14] In addition, there is no cover material at the top of the dump for avoiding odorous emissions and light materials such as polythene debris to the surroundings. The high rainfall in the central hills is an added concern in the context of leachate control to the main river system.…”

Section: Introductionmentioning

confidence: 99%

“…[4] Similarly, the groundwater and surface water around the Gohagoda dumpsite area have been identified as being contaminated by the dumpsite leachate. [14,15] Therefore, it is very important to understand such environments/locations to avoid or minimize the pollution of ground or surface waters.…”

Section: Introductionmentioning

confidence: 99%

Leachate plume delineation and lithologic profiling using surface resistivity in an open municipal solid waste dumpsite, Sri Lanka

Wijesekara¹,

Silva²,

Wijesundara³

et al. 2014

Environmental Technology

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This study presents the use of direct current resistivity techniques (DCRT) for investigation and characterization of leachate-contaminated subsurface environment of an open solid waste dumpsite at Kandy, Sri Lanka. The particular dumpsite has no liner and hence the leachate flows directly to the nearby river via subsurface and surface channels. For the identification of possible subsurface flow paths and the direction of the leachate, DCRT (two-dimensional, three-dimensional and vertical electrical sounding) have been applied. In addition, the physico-chemical parameters such as pH, electrical conductivity (EC), alkalinity, hardness, chloride, chemical oxygen demand (COD) and total organic carbon (TOC) of leachate collected from different points of the solid waste dumping area and leachate drainage channel were analysed. Resistivity data confirmed that the leachate flow is confined to the near surface and no separate plume is observed in the downstream area, which may be due to the contamination distribution in the shallow overburden thickness. The stratigraphy with leachate pockets and leachate plume movements was well demarcated inside the dumpsite via low resistivity zones (1-3 Ωm). The recorded EC, alkalinity, hardness and chloride contents in leachate were averaged as 14.13 mS cm⁻¹, 3236, 2241 and 320 mg L⁻¹, respectively, which confirmed the possible causes for low resistivity values. This study confirms that DCRT can be effectively utilized to assess the subsurface characteristics of the open dumpsites to decide on corridor placement and depth of permeable reactive barriers to reduce the groundwater contamination.

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Fate and transport of pollutants through a municipal solid waste landfill leachate in Sri Lanka

Cited by 39 publications

References 26 publications

Levels of Organic Pollution Indicators in Groundwater at the Old Landfill and Waste Management Site

Levels of Organic Pollution Indicators in Groundwater at the Old Landfill and Waste Management Site

Characteristics and risks of secondary pollutants generation during compression and transfer of municipal solid waste in Shanghai

Leachate plume delineation and lithologic profiling using surface resistivity in an open municipal solid waste dumpsite, Sri Lanka

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