摘要
云南金顶铅锌矿是镉(Cd)元素富集区,采矿活动导致Cd释放出来进入地表环境造成Cd污染。矿区水体中出现较高含量的Cd,高出天然河流中Cd含量的50～100倍。矿区架崖山、北厂和跑马坪等采矿区水体中Cd浓度范围在15～30μg/L之间。矿区水体中Cd含量水平表现为:矿山浅层地下水>矿山溪流水>江河水。研究结果表明,矿区江下游河段水体明显受Cd污染,其中水体中Cd的平均含量为15.7μg/L,悬浮物中Cd含量为49.3mg/kg,沉积物中Cd含量为203.7mg/kg。矿区载Cd岩石和矿物的自然风化是造成矿区水环境中Cd污染的直接原因。
The Jinding Pb-Zn deposit in Yunnan is rich in cadmium, and mining activity facilitates releasing of cadmium into the aquatic ecosystem. Water in the mining district contains elevated cadmium concentration, being 50 - 100 times higher than that of natural water. Cadmium concentrations in the local catchment range from 15 to 30 μg/L, and show the following dispersion pattern： shallow groundwater of the mining district 〉 stream water of the mining district 〉 river water of the Bijiang River. The results indicate that the river water of the lower reach of the Bijiang River was obviously polluted by cadmium, with an average cadmium concentration of 15.7 μg/L in water, 49.3 mg/kg in suspended Cd-rich rocks and minerals sediments, and 203.7 mg/kg in river sediment. The natural weathering processes of are the main factor of cadmium pollution on the local aquatic ecosystem with high risk.
出处
《地球化学》
CAS
CSCD
北大核心
2007年第6期612-620,共9页
Geochimica
基金
国家自然科学基金(40773072)
中国科学院"西部之光"项目(2006)
重庆地质矿产研究院专项经费资助项目
关键词
CD
环境影响
水地球化学
金顶铅锌矿
cadmium
environmental effect
hydrogeochemistry
Jinding Pb-Zn deposit
