Release of pollutants in MBT landfills: Laboratory versus field

Molleda, A.; López, Armando; Cuartas, Miguel; Lobo, Amaya

doi:10.1016/j.chemosphere.2020.126145

Cited by 16 publications

(2 citation statements)

References 46 publications

(72 reference statements)

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“…One of the major concerns associated with MSW incineration ashes is the leaching of heavy metals into the environment upon disposal (Tucker et al, 2020;Molleda et al, 2020). Since the spent ash catalysts will be disposed or reused in other applications after the loss of catalytic activity, it is necessary to investigate the influence of catalytic reforming on the leaching behavior of heavy metals.…”

Section: Metal Leachingmentioning

confidence: 99%

In situ catalytic reforming of plastic pyrolysis vapors using MSW incineration ashes

Ahamed

Liang

Chan

et al. 2021

Environmental Pollution

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Section: Metal Leachingmentioning

confidence: 99%

In situ catalytic reforming of plastic pyrolysis vapors using MSW incineration ashes

Ahamed

Liang

Chan

et al. 2021

Environmental Pollution

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“…Leaching tests are widely used for the determination of contaminant release rates from soils [ 1 , 2 , 3 , 4 ], recycling materials [ 5 , 6 , 7 , 8 , 9 , 10 , 11 ], construction products [ 12 , 13 , 14 , 15 , 16 ], radioactive and other waste materials [ 17 , 18 ]. Compared to traditional batch shaking tests, column tests are preferred for assessing the risk of release of potential pollutants into groundwater or surface waters because they are closer to natural conditions [ 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Mass Transfer Principles in Column Percolation Tests: Initial Conditions and Tailing in Heterogeneous Materials

2021

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Initial conditions (pre-equilibrium or after the first flooding of the column), mass transfer mechanisms and sample composition (heterogeneity) have a strong impact on leaching of less and strongly sorbing compounds in column percolation tests. Mechanistic models as used in this study provide the necessary insight to understand the complexity of column leaching tests especially when heterogeneous samples are concerned. By means of numerical experiments, we illustrate the initial concentration distribution inside the column after the first flooding and how this impacts leaching concentrations. Steep concentration gradients close to the outlet of the column have to be expected for small distribution coefficients (Kd<1 L kg−1) and longitudinal dispersion leads to smaller initial concentrations than expected under equilibrium conditions. In order to elucidate the impact of different mass transfer mechanisms, film diffusion across an external aqueous boundary layer (first order kinetics, FD) and intraparticle pore diffusion (IPD) are considered. The results show that IPD results in slow desorption kinetics due to retarded transport within the tortuous intragranular pores. Non-linear sorption has not much of an effect if compared to Kd values calculated for the appropriate concentration range (e.g., the initial equilibrium concentration). Sample heterogeneity in terms of grain size and different fractions of sorptive particles in the sample have a strong impact on leaching curves. A small fraction (<1%) of strongly sorbing particles (high Kd) carrying the contaminant may lead to very slow desorption rates (because of less surface area)—especially if mass release is limited by IPD—and thus non-equilibrium. In contrast, mixtures of less sorbing fine material (“labile” contamination with low Kd), with a small fraction of coarse particles carrying the contaminant leads to leaching close to or at equilibrium showing a step-wise concentration decline in the column effluent.

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Heavy Metal Characteristics of Soil and Leachate Resistivity Mapping of Malacca Landfill

Detho,

Kadir,

Zawani

2024

Water Air Soil Pollut

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Release of pollutants in MBT landfills: Laboratory versus field

Cited by 16 publications

References 46 publications

In situ catalytic reforming of plastic pyrolysis vapors using MSW incineration ashes

In situ catalytic reforming of plastic pyrolysis vapors using MSW incineration ashes

Mass Transfer Principles in Column Percolation Tests: Initial Conditions and Tailing in Heterogeneous Materials

Heavy Metal Characteristics of Soil and Leachate Resistivity Mapping of Malacca Landfill

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