Elemental composition and speciation of some landfill leachates with particular reference to cadmium

Bolton, Kim A.; Evans, L. J.

doi:10.1007/bf00293965

Cited by 45 publications

(22 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Knox and Jones (1979) showed that both low-molecular-weight compounds (<500) comparable to simple carboxylic acids and high-molecular-weight compounds (>10000) contributed significantly to cadmium complexation. Bolton and Evans (1991) performed some speciation calculations on four leachates. Their calculations showed that 38% of Cd was present in complexes with organic ligands and 32% with inorganic ligands, while Zn and Ni were present in complexes (36% and 68%, respectively) exclusively with organic ligands.…”

Section: Heavy Metal Mobilizing Processes In Landfillsmentioning

confidence: 99%

Present and Long-Term Composition of MSW Landfill Leachate: A Review

Kjeldsen

Barlaz

Rooker

et al. 2002

Critical Reviews in Environmental Science and Technology

2,023

1,059

View full text Add to dashboard Cite

ABSTRACT:The major potential environmental impacts related to landfill leachate are pollution of groundwater and surface waters. Landfill leachate contains pollutants that can be categorized into four groups (dissolved organic matter, inorganic macrocomponents, heavy metals, and xenobiotic organic compounds). Existing data show high leachate concentrations of all components in the early acid phase due to strong decomposition and leaching. In the long methanogenic phase a more stable leachate, with lower concentrations and a low BOD/COD-ratio, is observed. Generally, very low concentrations of heavy metals are observed. In contrast, the concentration of ammonia does not decrease, and often constitutes a major long-term pollutant in leachate. A broad range of xenobiotic organic compounds is observed in landfill leachate. The long-term behavior of landfills with respect to changes in oxidation-reduction status is discussed based on theory and model simulations. It seems that the somewhere postulated enhanced release of accumulated heavy metals would not take place within the time frames of thousands of years. This is supported by a few laboratory investigations. The existing data and model evaluations indicate that the xenobiotic organic compounds in most cases do not constitute a major long-term problem. This may suggest that ammonia will be of most concern in the long run.

show abstract

Section: Heavy Metal Mobilizing Processes In Landfillsmentioning

confidence: 99%

Present and Long-Term Composition of MSW Landfill Leachate: A Review

Kjeldsen

Barlaz

Rooker

et al. 2002

Critical Reviews in Environmental Science and Technology

2,023

1,059

View full text Add to dashboard Cite

show abstract

“…The leachate composition for a given land®ll cannot be predicted since the parameters in¯uencing it are not easy to quantify. Research has shown that the composition of land®ll leachate from the same source, as well as from different sources, is extremely variable (Chian and DeWalle, 1976;Bolton and Evans, 1991), and suggests that leachate quality can change as a land®ll ages (Chian and DeWalle, 1976). The leachate composition of recent and older areas within a municipal land®ll has been studied and it has been con®rmed that it alters with time (Ragle et al, 1995).…”

Section: Background Informationmentioning

confidence: 99%

Integrated environmental monitoring and simulation system for use as a management decision support tool in urban areas

Fatta

Naoum

Loizidou

2002

Journal of Environmental Management

View full text Add to dashboard Cite

“…In addition to supplying nutrients to the soil, organic litter also affects metal solubility (del Castilho et al 1993). Dissolved organic matter in poultry litter could effectively contribute organic ligands to form complexes with heavy metals in soil (McBride 1989;Bolton and Evans 1991); thus, it may affect the mobility and redistribution characteristics of heavy metals, and lead to deterioration of groundwater quality. Sewage sludge and forest litter can also release soluble organic ligands, which can complex with trace metal cations.…”

Section: Introductionmentioning

confidence: 99%

Redistribution of zinc, cadmium, and lead among soil fractions in a sandy calcareous soil due to application of poultry litter

Jalali

Khanboluki

2007

Environ Monit Assess

View full text Add to dashboard Cite

This study was conducted to evaluate, using soil columns, the mobilization and redistribution of heavy metals (Zn, Cd, and Pb) among different soil fractions by soluble organic ligands within poultry litter. Uncontaminated soil was amended with Zn, Cd, and Pb to achieve concentration levels of 400, 8, and 200 mg kg(-1) soil, respectively. Columns repacked with this amended soil were leached with distilled water, 0.01 M EDTA, 0.01 M CaCl2, or poultry litter extract (PLE) solutions. After leaching, the soil samples in the columns were sequentially extracted for exchangeable (EXC), carbonate (CARB) organic matter (OM), Mn oxide (MNO), Fe oxide (FEO), and residual (RES) fractions. Considerable mobilization of Zn, Cd, and Pb occurred in soil during EDTA leaching. Leaching with PLE and CaCl2 solutions significantly decreased Zn and Cd concentrations in the EXC, CARB, and OM fractions. These solutions significantly decreased Pb concentration in the EXC fraction, while PLE solubilized more Pb from EXC fraction than CaCl2. Thus, the applied poultry litter may change Zn, Cd, and Pb fractions in metal-amended soil and possibly enhance metal mobility.

show abstract

Elemental composition and speciation of some landfill leachates with particular reference to cadmium

Cited by 45 publications

References 20 publications

Present and Long-Term Composition of MSW Landfill Leachate: A Review

Present and Long-Term Composition of MSW Landfill Leachate: A Review

Integrated environmental monitoring and simulation system for use as a management decision support tool in urban areas

Redistribution of zinc, cadmium, and lead among soil fractions in a sandy calcareous soil due to application of poultry litter

Contact Info

Product

Resources

About