Experimental study of the pH, ionic strength, and reversibility behavior of bacteria–mineral adsorption

摘要: In this study, we investigate the adsorption of Bacillus subtilis onto surfaces two minerals, corundum and quartz, as a function time, pH, ionic strength, bacteria:mineral mass ratio. Experimental results indicate that bacteria mineral surface is completely reversible process with equilibrium being reached in less than 1 h. Our data also B. displays higher affinity for quartz surfaces, extent increases decreasing increasing ratio, strength. The behavior governed by chemical speciation bacterial surfaces. We describe experimental model. model accounts hydrophobic electrostatic interactions occur between can account effects solution chemistry well on adsorption. These are first to integrate ratio quantitative Such an approach enables bacteria-mineral reactions be incorporated into more standard water-rock models, providing better understanding transport both natural bio-engineered bacteria-bearing geochemical systems. Copyright © 2000 Elsevier Science Ltd