%0 Journal Article
%T Evaluation of Phytoavailability of Zinc and Cadmium in Contaminated Soils by a Short Sequential Extraction Procedure<br>简化连续提取法评价污染土壤中Zn、Cd的植物有效性
%A BI Xiang-yang
%A YANG Yuan-gen
%A FENG Xin-bin
%A LI Fei-li
%A SUN Li
%A <br>闭向阳
%A 杨元根
%A 冯新斌
%A 李非里
%A 孙力
%J 环境科学
%D 2006
%I 
%X Cultivated soils and maize samples from heavy metal contaminated locations affected by zinc smelting activities were collected in Hezhang County,Guizhou Province.Chemical fractions of zinc and cadmium(extracted by 0.01 mol·L-1 CaCl_2 and 0.005(mol·L-1) DTPA) were evaluated by using a short three-step sequential extraction procedure.Results showed that Zn and Cd in soil were dominated by residual fraction,while the CaCl2 extractable and DTPA extractable fraction are only accounted for 0.63%,3.91% for Zn,and 10.94%,10.13% for Cd,respectively.Correlation analyses demonstrated that soil CaCl2 extractable metals were not correlated with maize metal concentrations,whereas the DTPA extractable fraction,residual fraction and total Zn and Cd concentrations were correlated significantly with the metal concentrations in maize roots,stems and leaves.These results indicated that CaCl2 extractable fraction may not pay important role on metal phytoavailability in the studied soils.While DTPA extractable fraction and total metal concentrations can be employed to evaluate metals phytoavailability.
%K zinc
%K cadmium
%K contaminated soil
%K maize
%K sequential extraction
%K phytoavailability<br>Zn
%K Cd
%K 污染土壤
%K 玉米
%K 连续提取
%K 植物有效性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=E3D2D8C5998BD7C7&yid=37904DC365DD7266&vid=DB817633AA4F79B9&iid=E158A972A605785F&sid=BDEE8BA20F4733DB&eid=786A9BAE5CF9B9EE&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=29