西藏盐湖及其水系中的痕量金属

TRACE ELEMENTS IN SALT LAKES AND WATER SYSTEMS IN XIZANG (TIBET) PLATEAU

于1978年采集了西藏高原26个盐湖、6条河流、10处泉水及3地盐湖区的大气降水的水样,以ZCP等离子光谱仪测定所采水样中Fe,Mn,Al,Cu,Pb,Zn,Ni,Cr等痕量金属含量,结果表明,1.盐湖水及河流、泉水和大气降水等水系中的痕量金属均高度富集,但以盐湖水的最大;盐湖水中各痕量金属富集程度不一,其顺序:Pb>Mn>Cr>Fe>Zn>Cu>Al>Ni。2.区域出露的岩性、气候、湖盆及水文等为盐湖水中富集痕量金属创造了有利条件。3.高痕量金属浓度的河流、泉水及大气降水是控制和影响盐湖水中痕量金属富集的主要的直接因素。4.盐湖水的矿化度、pH及水化学类型也影响着水中痕量金属的富集。

Trace elements like Fe,Mn, Al,Cu,Pb, Zn, Ni and Cr in 26 salt lakes, 6 rivers, 10 springs and precipitation waters in 3 areas in the Xizang Plateau from 1978 were measured and discussed. The author noticed that: 1. Trace elements are highly, enriched in salt lakes, rivers, springs and precipitation waters in this region, the highest one is in salt lake water. The enrichment level of trace elements in salt lake water is in the following sequence: Pb > Mn > Cr > Fe > Zn > Cu>Al> Ni. 2. The rock types, climate patterns, lake basin and hydrological conditions in this region are contributory to the enrichment of trace elements in salt lake waters. 3. High trace element content rivers, springs and precipitation waters are the main direct factors that control the enrichment of trace elements in salt lake waters. 4. The salinity, pH values and hydrochemical types of salt lake water also influence the enrichment of trace elements.