| dc.description.abstract | Chemical solvents used in the production of many industrial products can seep into groundwater and cause pollution if improperly executed. For example, PCE (tetrachloroethylene) and the daughter species of it are the common chlorinated solvents in industrial sites. The release of multiple internal pollution sources is common to observe at the in-situ contaminated sites. However, in many previous studies on the development of contaminant transport models in the past, the models considered boundary sources in most studies would be limited and difficult to be widely used when simulating the contaminant transport problems of multiple internal pollution sources. Contaminant transport model considering internal sources can simulate the release of multiple pollution sources inside the contaminated site, and the rate-limited sorption is considered in the model to avoid underestimating the concentration of degradable pollutants and the situation where linear equilibrium sorption is not applicable. This study develops a semi-analytical model of multi-species contaminant transport subject to multiple internal pollution sources, which also considers important transport mechanisms included in previous studies, such as advection, dispersion, rate-limited sorption and first-order decay. The derivation of this semi-analytical model applies Laplace transform, finite Fourier cosine transform, generalized integral transform and a series of inverse transform. The greatest contribution of this model is that it can simulate the release of multiple internal pollution sources at the contaminated sites, and can be simulated at any groundwater flow velocity. It can not only provide a more accurate prediction for the distribution of the pollution plume, but also replace the previous models that only considered boundary source as the basis for preliminary assessment of pollution remediation. | en_US |