The effect of accompanying anions on the adsorbability and extractability of Pb added in soils was studied by using bach equilibria and incubation-extraction mothods.Pb concentration ranged between 0.48-2.41 mM in the...The effect of accompanying anions on the adsorbability and extractability of Pb added in soils was studied by using bach equilibria and incubation-extraction mothods.Pb concentration ranged between 0.48-2.41 mM in the adsorption experiment,and Pb added to soil from 2.14 to 19.31mM Pb/kg with an incubation time of 2-16 weeks in the incubation-extraction test in which 1M NH4OAc(pH 7) was taken as an extraction agent,and the Pb compounds used are PbCl2,Pb(NO3)2 and Pb(OAc)2.The values of pH50 for Pb retention and the parameters,b and k values,of Langmuir equation were used to distinguish the difference of adsorbability and extractability of Pb affected by anions,respectively.Judging from the results of either pH50 value or b value,the influences of Cl^- and NO3^- on the adsorbability and extractability of Pb in soils were similar but quite different from those of OAc^-.The relative loading capacities of soils to Pb calculated according to the extraction rate showed that the values of Pb(OAc)2 were higher than those of PbCl2 and Pb(NO3)2.展开更多
Using Sabina J. Mtiller＇s theory of myth, this paper will analyze the deconstruction and revision of myths in The Green Helmet. Irish mythology, as described by M^iller, has in its inheritance a myth of Ireland being...Using Sabina J. Mtiller＇s theory of myth, this paper will analyze the deconstruction and revision of myths in The Green Helmet. Irish mythology, as described by M^iller, has in its inheritance a myth of Ireland being personified in an image of a woman, a goddess of the land. This Ireland-as-woman image, as well as Irish heroism and their fighting spirit will be investigated in Yeats＇ drama to show its simplification and to mock its nature. The analysis will also give an insight into the diversified and complex image of the Irish nation.展开更多
文摘The effect of accompanying anions on the adsorbability and extractability of Pb added in soils was studied by using bach equilibria and incubation-extraction mothods.Pb concentration ranged between 0.48-2.41 mM in the adsorption experiment,and Pb added to soil from 2.14 to 19.31mM Pb/kg with an incubation time of 2-16 weeks in the incubation-extraction test in which 1M NH4OAc(pH 7) was taken as an extraction agent,and the Pb compounds used are PbCl2,Pb(NO3)2 and Pb(OAc)2.The values of pH50 for Pb retention and the parameters,b and k values,of Langmuir equation were used to distinguish the difference of adsorbability and extractability of Pb affected by anions,respectively.Judging from the results of either pH50 value or b value,the influences of Cl^- and NO3^- on the adsorbability and extractability of Pb in soils were similar but quite different from those of OAc^-.The relative loading capacities of soils to Pb calculated according to the extraction rate showed that the values of Pb(OAc)2 were higher than those of PbCl2 and Pb(NO3)2.
文摘Using Sabina J. Mtiller＇s theory of myth, this paper will analyze the deconstruction and revision of myths in The Green Helmet. Irish mythology, as described by M^iller, has in its inheritance a myth of Ireland being personified in an image of a woman, a goddess of the land. This Ireland-as-woman image, as well as Irish heroism and their fighting spirit will be investigated in Yeats＇ drama to show its simplification and to mock its nature. The analysis will also give an insight into the diversified and complex image of the Irish nation.
