Pedosphere 1(1): 51--62, 1991
ISSN 1002-0160/CN 32-1315/P
©1991 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Effect of anions on adsorbability and extractability of lead added in soil |
| 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 to soils was studied by using batch equilibria and incubation-extraction methods. Pb concentration was 0.48-2.41 mM in the adsorption experiment, and 2.14 to 19.31 mM Pb/kg soil were incubated for 2-16 weeks in the incubation-extraction test in which 1M NH4OAc (pH 7) was used as the extractant; the added Pb compounds were PbCl2, Pb(NO3)2 and Pb(Oac)2. The values of pH50 for Pb retention and the b and k values of the Langmuir equation were used to distinguish the differences in adsorbability and extractability of Pb respectively. The effects of Cl- and NO3- on the adsorbability and extractability of Pb were similar but lower than those of Oac-. The relative loading capacities of soils for Pb were higher for Pb(Oac)2 than for PbCl2 and Pb(NO3)2. |
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| Citation: Chen, M., H., Zheng, R., C., Sun and H., X. 1991. Effect of anions on adsorbability and extractability of lead added in soil. Pedosphere. 1(1): 51-62. |
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