| 滇池、洱海水及沉积物中重金属元素的行为 |
| 摘要点击 912 全文点击 1078 投稿时间：1994-09-15 |
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| 中文关键词 滇池 洱海 沉积物 重金属 |
| 英文关键词 Dianchi Erhai Sediment heavy metals |
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| 中文摘要 |
| 洱海水中重金属元素的含量不高,平均值以10-9计算:Cu1.6,Pb0.59,Zn9.8,Cd0.009,Cr0.24,水质较好;沉积物中每一样品同一元素的含量一般均趋近于平均值,以10-6计算:Cu111,Ph60,Zn127,Cd0.591,Cr130。因此,洱海至今仍是一个较清洁的湖泊。滇池水质较差,内草海段水中重金属元素含量明显上升,以10-9计算:Cu5.8,Pb0.55,Zn32,Cd1.611,Cr0.24,但远未超过国家饮用水标准。不同湖段的沉积物已受到一些重金属元素的污染,外草海较明显,内草海较严重,表层沉积物中重金属含量以10-6计算:Cu920,Pb647,Zn2208,Cd164.85,Cr55. |
| 英文摘要 |
| he heavy metals in waters of Lake Erhai, Yunnan Province, were found not at higher levels,with the following mean values calculated in ppb:Cu 1.6, Ph 0.59, Zn 9. 8, Cd 0.009, and Cr 0.24, so that the water quality was assessed as a better one. The same elements in each sample of the sediments form Lake Erhai generally had a value approximate to their respective average levels as calculated in ppm as follows: Cu 111, Ph 60, Zn 127, Cd 0.591 and Cr 130, so that so far Lake Erhai has been still a cleaner lake. Lake Dianchi in the Yunnan Province was found to have a rather worse water quality, particularly in its section of Inner Caohai where there were significantly increased levels of heavy metals in water as calculated in ppb as follows: Cu 5. 8, Ph 0.55, Zn 32, Cd 1.611 and Cr 0.24, which are well below the national standards for drinking water. The sediments in different sections of the lake have been found to be polluted with someheavy metals, to a more significant extent in the section of Outer Caohai and to a more serious extent in the section of Inner Caohai. The heavy metals in the top layer of sediment were calculated in ppm at the following levels:Cu 920, Ph 647, Zn 2208, Cd 164. 85 and Cr 55. |
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