乌兰布和沙漠与黄河沉积物磷的形态分析

The analysis of the phosphorus forms in sand of the WuLanBuHe desert and sediments of the Yellow River

本文用改进的SEDEX方法，对乌兰布和沙样和黄河上游沉积物进行了磷的形态提取分析，研究了乌兰布和沙漠不同粒径沙洋的各形态磷的差异及其与黄河沉积物各形态磷的关系。分析结果表明乌兰布和沙样130～150μm粒径的Ca—P、De—P、Or—P都比小于63μm粒径含量小。乌兰布和沙样和黄河上游沉积物无机磷的含量远远比有机磷的要高，其顺序为Ca—P〉De—P〉Fe—P〉Or—P〉可交换态磷。原样和100-120目（130-150μm）样品的可交换磷以化学吸附为主，而250目以上（〈63μm）的样品则以物理吸附为主。

The experiment adopts the improved method of SEDEX to carry the extraction and analysis on the phosphorus forms in sand of the WuLanBuHe desert and sediments of the Yellow River. The difference of various sepciations of P in sand of the WuLanBuHe desert and the relation between the content of P in sand of the WuLanBuHe desert and sediments of the Yellow River. Results showed the E ＆ L-P and Fe-P IN 130-150μm sand of the WuLanBuHe desert were higher than the sand 63μm lower, but Ca-P, De-P,Or-P were opposite. The content of organic phosphate in sand of the WuLanBuHe desert and the higher reach of the Yellow River were lower than inorganic phosphate, the order was Ca-P〉De-P〉Fe -P〉Or-P〉loosely sorbed-P. Chemical adsorption was main existing form in loosely sorbed-P of original （no grade） and the sample of 130-150μm sand, but physical sorption was main existing form in sample of higher 63μm.