黄河口及其附近海域沉积物中可提取的铅和镍

THE STUDY OF EXTRACTABLE Pb AND Ni IN SEDIMENTS IN YELLOW RIVER ESTUARINE AREAS

讨论了黄河口及其附近海域沉积物中１ｍｏｌ盐酸可提取铅与镍的含量范 围为铅 ７．９２～２８．８６ｍｇ／ｋｇ，镍 ４．５１～１４．７１ｍｇ／ｋｇ，与典型性的五步形态提取分析 法前四部分之和具有可比性。同时 Ｉｍｏｌ盐酸提取的铅、镍与可提取锰、铁及沉积物 的外比表面积具有很好的正相关。通过进一步的多元回归分析可以发现黄河口及 其附近海域沉积物中可提取铅主要结合在氧化锰及粘土矿的外表面上，而和铁的 关系不明显，可提取镍与铁、锰、氧化物的关系较好，而与粘土外表面关系不显著。 由于镍的保守性，而镍与铅又有较好的线性相关，由此将铅与镍作一线性相关 曲线，发现高于正负二倍标准偏差的点没有，说明黄河口及其附近海域没有受到铅 污染。

The contents of 1 mol HCL extractable Pb and Ni in sediments in Yellow River estuarine areas are: Pb 7. 92-28. 86mg/kg(dry weight) and Ni 4. 51-14. 71 mg/kg (dry weight), which are comparative to the sum of the former four parts from the five-step sequential extraction. The extractable Pb and Ni had good relationship with extractable Fe, Mn and extra specific surface areas. In order to identify which element affected more, the multiple regression was made, and the results .show that the main form of extractable Pb was combining with Fe-Mn oxides and that of extractable Pb was with Mn oxides and clay surface areas.