Pb2+ and Cd2+ in leachate were adsorbed on clay-solidified grouting curtain for waste landfills with equilibrium experiment. The cation exchange capacity was determined with ammonium acetate. And the concentration of ...Pb2+ and Cd2+ in leachate were adsorbed on clay-solidified grouting curtain for waste landfills with equilibrium experiment. The cation exchange capacity was determined with ammonium acetate. And the concentration of heavy metal cations in leachate was determined with atomic absorption spectrophotometer. Their equilibrium isotherms were measured, and the experimental isotherm data were analyzed by using Freundlich and Langmuir models. The results show that the adsorption capacities of the heavy metal cations are closely related to the compositions of clay-solidified grouting curtain, and the maximum adsorption appears at the ratio of cement to clay of 2∶4 in the experimental conditions. At their maximum adsorption and pH 5.0, the adsorption capacities of Pb 2+ and Cd 2+ are 16.19mg/g and 1.21mg/g. The competitive adsorption coefficients indicate that the adsorption of clay-solidified grouting curtain for Pb2+ is stronger than that for Cd 2+ . The adsorption process conforms to Freundlich’s model with related coefficient higher than 0.996.展开更多
英国著名的平价发烧音响制造者ARCAM(雅骏)公司,目前的产品分为高价位的准Hi-End级FMJ(Full MetalJacket)系列,和中低价位的DiVA(Digitally integrated Video and Audio)系列.而在这两个系列中,都有对应Hi-Fi和HomeCinema这两大类消费...英国著名的平价发烧音响制造者ARCAM(雅骏)公司,目前的产品分为高价位的准Hi-End级FMJ(Full MetalJacket)系列,和中低价位的DiVA(Digitally integrated Video and Audio)系列.而在这两个系列中,都有对应Hi-Fi和HomeCinema这两大类消费者的产品.展开更多
基金Project (200065) supported by University Key Teacher Foundation of the Ministry of Education of China
文摘Pb2+ and Cd2+ in leachate were adsorbed on clay-solidified grouting curtain for waste landfills with equilibrium experiment. The cation exchange capacity was determined with ammonium acetate. And the concentration of heavy metal cations in leachate was determined with atomic absorption spectrophotometer. Their equilibrium isotherms were measured, and the experimental isotherm data were analyzed by using Freundlich and Langmuir models. The results show that the adsorption capacities of the heavy metal cations are closely related to the compositions of clay-solidified grouting curtain, and the maximum adsorption appears at the ratio of cement to clay of 2∶4 in the experimental conditions. At their maximum adsorption and pH 5.0, the adsorption capacities of Pb 2+ and Cd 2+ are 16.19mg/g and 1.21mg/g. The competitive adsorption coefficients indicate that the adsorption of clay-solidified grouting curtain for Pb2+ is stronger than that for Cd 2+ . The adsorption process conforms to Freundlich’s model with related coefficient higher than 0.996.
文摘英国著名的平价发烧音响制造者ARCAM(雅骏)公司,目前的产品分为高价位的准Hi-End级FMJ(Full MetalJacket)系列,和中低价位的DiVA(Digitally integrated Video and Audio)系列.而在这两个系列中,都有对应Hi-Fi和HomeCinema这两大类消费者的产品.
