Modelling of Environmental Processes

Baltrėnas, Pranas; Grubliauskas, Raimondas; Pranskevičius, Mantas; Vaišis, Vaidotas; Zagorskis, Alvydas

doi:10.3846/1546-s

Cited by 1 publication

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“…Diffusion describes the spread of particles through random motion usually from regions of higher concentration to regions of lower concentration. For diffusion in porous media (soil), the change of contaminant concentration over time in volume can be calculated by Fick's second law (Baltrėnas et al 2015):…”

Section: Migration Of Heavy Metalsmentioning

confidence: 99%

Theoretical Evaluation of Heavy Metals Migration and Sorption in Soil

Danila

Vasarevičius

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. Heavy metals are one of the group of toxic pollutants in the soil. Over the past years, many researches have been conducted on the migration of heavy metals in soils and various models were developed in order to study the mobility of toxic heavy metals. The convection-dispersion equation is the most commonly used equation for describing the migration of toxic pollutants in the soil. Various properties of the soil influence the mobility of heavy metals: soil pH, texture, sorption characteristics. Heavy metals not only migrate in the soil, but also interact with mineral and organic soil particles. The mobility of heavy metals in soils is determined by their partitioning between solid and aqueous phases of the soil. The partitioning of heavy metals between these two phases are described by sorption/desorption, precipitation/dissolution, and redox processes. Natural mineral and organic sorbents present in soils have a strong influence on heavy metals sorption. As these sorbents are usually negatively charged, they attract heavy metals cations through electrostatic force.

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Section: Migration Of Heavy Metalsmentioning

confidence: 99%