长江口和黄河口沉积物非残渣态中元素的相关性

Study on the interrelationships between the non residual elements in Changjiang and Huanghe estuarine sediments

研究了长江口、黄河口表层沉积物中元素可提取量间的相关性、元素可提取量与粒度组成之间的关系。通过对两个区域不同类型的大量沉积物的研究结果表明 :用 1mol/LHCl或 0 5mol/LHCl+H2 O2 提取沉积物 ,元素Cu、Zn、Pb、Co、Li、Ni、Fe、K、Al的提取量之间存在显著的正相关关系 ;元素Zn、Cu、Pb、Co、Li、Ni、Fe、K、Al的可提取量与沉积物中粘土含量呈显著的正相关关系 ;与 1mol/LHCl、0 5mol/LHCl+H2 O2 两种提取方法相比较 ,2 5 %HAc只提取了部分结合松散的金属 ,元素的可提取量之间以及与粘土含量之间的相关关系较差。初步发现了沉积物中部分元素可提取相的元素粒度控制规律。

The interrelationships among the extractable amounts of the elements such as Zn, Cu, Pb, Co, Cr, Li, Ni, Mn, Fe, K, Al and P and, between the extractable amounts of the elements and particle composition in the surface sediments in Changjiang and Huanghe estuarine were studied. The results showed that: (1) there were the significant interrelationships among the elements Cu, Zn, Pb, Co, Li, Ni Fe, K, Al extracted by 1 mol/L HCl or 0 5 mol/L HCl+H 2O 2; (2) the significant positive interrelationship was also found between the extractable phase of the elements Zn, Cu, Pb, Co, Li, Ni, Fe, K, Al and the clay concentration in the sediment; (3) comparison with the metals extracted by 1 mol/L HCl or 0 5 mol/L HCl+H 2O 2, 25%(V/V) acetic acid extracted only metals loosely associated with the matrix, the pourer interrelationship existed thus among the extractable amounts of elements and with the clay concentration in the sediment; (4) a preliminary control rule of the element particle size was found for the extractable amounts of partial elements in the sediment.