Modeling the effects of systematic variation in ionic strength on the attachment kinetics of Pseudomonas fluorescens UPER-1 in saturated sand columns

摘要: We report the effects of salt type and concentration on change in attachment kinetics when bacteria are pumped through a column water-saturated clean sand over relatively long periods time (up to 35 pore volumes). The species Pseudomonas fluorescens UPER-1 was found exhibit three different kinds kinetics: first order, second an intermediate order. modeled by using advection-dispersion equation coupled with set equations for each kind while colloid filtration theory predict collector efficiencies. At low or zero concentrations (≤10−4 M) second-order model (“blocking”), “first-order” model, intermediate-order (“ripening”), were all fit data equally well. high (≥10−3 ripening best. values collision efficiencies range 0.01–0.2, depending upon concentration. This study points out importance long-term experiments effect ionic strength saturated porous media phenomenon cell-to-cell at strength. further expect attach natural suggests modeling framework.