Abstract
A quantitative analysis of a mass transfer problem of chemicals in porous media is presented. The specific problem considered is that where the inflow boundary has an initial zero concentration, receives an inflow of chemical concentration U0 for a period of finite duration T1, after which the inflow continues with water of zero chemical concentration. Free and sorbed phase chemical concentration distribution equations are first obtained for dispersion during the time period 0 < t < T1, during which the chemical enters the soil. The solutions are presented in the form of single convolution integral expressions obtained by Laplace transform techniques. This resulting distribution becomes the initial concentration distribution for the subsequent leaching process during the time period T1 < t < T2. Equations are developed which describe the free and sorbed phase chemical distributions resulting from the leaching process. Solutions to both sets of equations are obtained by numerical quadrature techniques. A typical example is displayed. The scheme that is presented is easily adaptable to a repeating or “pulsed” system. Periodic application of a fertilizer, followed by irrigation, is an example of such a system.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
