| 阴离子对加入到土壤中的铅吸附与提取的影响 |
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| 作者姓名： | Chen H. M. Zheng C. R. and Sun X. H. |
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| 作者单位： | aboratoryofMaterialCyclinginPedosphere,InstituteofSoilScience,AcademiaSinica,P.O.Box821,Nanjing（China |
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| 摘 要： | 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.
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| 关 键 词： | 土壤污染 离子吸附能力 萃取性 铅污染 兰格缪尔方程式 土壤pH值 氯化铅 硝酸铅 醋酸铅 |
Effect of anions on adsorbability and extractability of lead added in soil |
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| Chen,H. M.,Zheng,C. R. and Sun,X. H..Effect of anions on adsorbability and extractability of lead added in soil[J].Pedosphere,1991,1(1):51-62. |
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| Authors: | Chen H M Zheng C R and Sun X H |
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| Abstract: | 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. |
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