This Special Issue highlights many of the predominant contaminant transport and fate processes that redistribute solutes through natural engineered surface subsurface environments [...]

A quantity of miscible contaminant gas is released into the atmospheric boundary layer and the objective is to describe the evolution of contaminant concentration values within the cloud. Although turbulent convective motions will spread the contaminant cloud over distances of tens of meters the only mixing between host and contaminant fluid, and hence reduction of concentration values, takes p...

For T > 0, fixed, let UT = U × 0,T where U denotes a bounded open set in Rn.Suppose that U is filled with a material in which a contaminant is being transported by various means including diffusion and convection. Let the concentration of contaminant at x, t in UT be denoted by ux, t and let the vector field F⃗x, t denote the flux field for the contaminant. Then we can state a conservati...

The insecticidal properties and mechanisms of high-voltage air-based atmospheric cold plasma using a contained dielectric barrier discharge reactor were investigated against Tribolium castaneum as an important bio-contaminant in stored grains spoilage. mortality 95.0%–100% for preadult stages can be achieved within seconds treatment, but longer exposure (5 min) is required to kill adult insects...

Water quality management of rivers is one the challenges in analysis water resource systems. The optimal operation pollutant carrying capacity these systems provides significant economic value and could reduce treatment costs. In this study, application trading ratio system investigated to control cost pollutants a river make fair deal. regard, transfer coefficients between pollution sources, a...