摘要
作者于1985年8月,11月,1986年3月及1987年4月进行长江口海域铬的形态调查,表明该海域铬的分布趋势是江口高、外海低,并随离岸距离的增加而递减。枯水期,在3l°30′N附近出现外海低铬水舌向岸方向延伸。颗粒铬Cr(P)是铬的主要存在形态,但在夏季则是总溶解铬Cr(S)和三价铬Cr(Ⅲ)为主要存在形态。六价铬Cr(VI)占Cr(T)比率很低,所以是最次要形态,而Cr(Ⅲ)在溶解态中则是主要形态。黄浦江水中Cr(VI)含量要高于长江水,说明黄浦江存在着明显的铬污染。夏、秋季长江口物理、化学条件剧变时发生颗粒铬的迁移。
Chromium content in the Changjiang estuarine area is higher than that in outer area, but decreases with the increase of the distance off the estuary in Aug., Nov., 1985, Mar., 1986, April, 1987. This reflects the general trend of chromium transport in the Changjiang and Hu-angpu Rivers.In the dry season, water tongue of low chromium content stretched to the shore at 31°30'N. Paniculate chromium is a predominant species of existing chromium in seawater of this area, but not in summer, when the total dissolved chromium and trivalent chromium are principal species and hexavalent chromium is only secondary. Transfer of particulate chromium in summer and autumn occurred in lower salinity region.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1990年第6期571-577,共7页
Oceanologia Et Limnologia Sinica
