http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
윤혜온(Hye On Yoon),(Richard J. Reeder) 한국광물학회 2002 광물과 암석 (J.Miner.Soc.Korea) Vol.15 No.2
The sorption of Cd^2+ on calcite was studied in aqueous solutions of several electrolytes. The Cd^2+ concentration, 10^-8 M, was kept well below saturation with respect to CdCO_3(s). Sorption behavior of Cd^2+ in different ionic strengths of NaClO_4 solutions shows that sorption is independent of ionic strength. This result suggests that Cd^2+ sorption on calcite surface is of a specific nature, and adsorption is controlled by an inner-sphere type of surface complex. Two stages in the sorption behavior could be identified: an initial rapid uptake, followed by slower uptake reaching a maximum steady state by 145 hrs. No evidence was observed for surface precipitation, although it can not be entirely ruled out. Desorption of Cd^2+ from the calcite surface after resuspension into Cd-free solution is initially very rapid, but depends partly on the previous sorption history. Desorption behavior of Cd^2+ show that an initial rapid desorption followed either by slow uptake reaching a maximum, as in the adsorption experiments, or slowing desorption to reach a steady state minimum. This irreversible behavior of Cd^2+ sorption and desorption may act as one of the controls for regulating the mobility of dissolved Cd^2+ in natural aqueous systems. Calculated adsorption partition coefficients suggest that overall sorption and desorption process in the concentration range are controlled by a single mechanism.
Hyeon Yoon,Richard J. Reeder 한국광물학회 2002 광물과 암석 (J.Miner.Soc.Korea) Vol.15 No.2
The sorption of Cd2+ on calcite was studied in aqueous solutions of several electrolytes. The Cd2+ concentration, 10-8 M, was kept well below saturation with respect to CdCO3(s). Sorption behavior of Cd2+ in different ionic strengths of NaClO4solutions shows that sorption is independent of ionic strength. This result suggests that Cd2+ sorption on calcite surface is of a specific nature, and adsorption is controlled by an inner-sphere type of surface complex. Two stages in the sorption behavior could be identified: an initial rapid uptake, followed by slower uptake reaching a maximum steady state by 145 hrs. No evidence was observed for surface precipitation, although it can not be entirely ruled out. Desorption of Cd2+ from the calcite surface after resuspension into Cd-free solution is initially very rapid, but depends partly on the previous sorption history. Desorption behavior of Cd2+ show that an initial rapid desorption followed either by slow uptake reaching a maximum, as in the adsorption experiments, or slowing desorption to reach a steady state minimum. This irreversible behavior of Cd2+ sorption and desorption may act as one of the controls for regulating the mobility of dissolved Cd2+ natural aqueous systems. Calculated adsorption partition coefficients suggest that overall sorption and desorption process in the concentration range are controlled by d single mechanism.ingle mechanism.