Nanoparticles may play an important role in adsorption-desorption of heavy metals because of small sizes and huge surface area.In this study, natural soil nanoparticles were extracted from four typical soils, and adsorption and desorption of Pb(Ⅱ) by natural soil nanoparticles were investigated under different p H and ionic strengths(IS). Results showed that amount of adsorbed Pb(Ⅱ)on four different soil nanoparticles increased along with increases of p H when p H was lower than 3. Amount of Pb adsorption b...
表1供试土壤及纳米颗粒基本理化性质Table 1 Basic chemical and physical properties of soil and soil nanoparticles吸附和解吸是重金属在土壤或固相介质中发生的主要物理化学过程。重金属在土壤胶体上的吸附-解吸受到许多因素的影响[1]。首先受到土壤胶体本身特性的影响,包