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鄱阳湖流域沉积物中重金属研究及环境意义 总被引:4,自引:0,他引:4
随着社会经济的发展,鄱阳湖受到的污染越来越严重.其中位于饶河乐安河中下游的我国目前最大的铜矿--江西德兴铜矿以及位于信江中游的永平铜矿开采中产生的含重金属酸性废水是导致鄱阳湖部分区域重金属污染的主要点源.许多研究表明,湖泊表面沉积物是重金属污染物进入湖泊后迁移的重要归宿,它记录了人类工业文明中各种污染物质的来源、分布、迁移和转化的历史,是追溯重金属污染的程度重要工具.湖泊沉积物中重金属聚集主要与周边地区人类的活动有关,其垂向变化反映了人类活动与自然环境相互作用的历史,是评价环境现状及演变趋势,探测湖泊污染历史的最佳工具.沉积物中的重金属是水环境污染的指示者,能明显地反映出水体区域所受到的污染程度. 相似文献
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Geochemistry of Rare Earth Elements in Lamprophyres in Laowangzhai Gold Orefield, Yunnan Province 总被引:4,自引:2,他引:2
The super-large Laowangzhai gold ore deposit is situated in the northern Ailaoshan tectonic zone I Yunnan Province 9 and was foundat the end of 1980s. Lamprophyres are widelyspread over the orefield. The available datashow that the lamprophyres are tijmporally andspatially related to gold mineralization. In theorefield, lamprophyric dykes occur mainly along the main Northwest-Solltheast--strikingfaults and their subsidiary fractures and intruded into all the strata and magmatic rocks.Their … 相似文献
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Automatic element analyser is often used to prepare organic matters tor 15N analysis. It is seldom used to prepare water samples. Water samples are conventionally dealt with by Kjeldahl-Rittenberg technique. But it requires tedious and labor-intensive sample preparation. A fast and reliable method is proposed in this paper to prepare water samples for 15N analysis. 相似文献
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