摘要
Orthogonal experimental methods were applied to study effects of the joint action of eutrophication(nitrogen and phosphorus) and heavy metals(cadmium, lead and copper, zinc,chromium, arsenic etc.) pollution on growth and accumulation of the elements in Lemna minor L. and the desorption of elements in sediment by the cultivating test. And it is tried to find the principle of the combined pollution of eutrophication and heavy metals. The results showed that accumulation of the heavy metals in the plant mainly depended on the concentration in the water, and also depended on the nutrient level and co-existing elements of the water. High level of the nutrients could increase the primary production and partly low the toxicity of the heavy metals. The desorption of heavy metals in sediment obviously varied with the nutrient level in the water and with effctive order of Cd>As>Pb>Zn>Cr>Cu. There were certain correlations among the elements.
Orthogonal experimental methods were applied to study effects of the joint action of eutrophication(nitrogen and phosphorus) and heavy metals(cadmium, lead and copper, zinc,chromium, arsenic etc.) pollution on growth and accumulation of the elements in Lemna minor L. and the desorption of elements in sediment by the cultivating test. And it is tried to find the principle of the combined pollution of eutrophication and heavy metals. The results showed that accumulation of the heavy metals in the plant mainly depended on the concentration in the water, and also depended on the nutrient level and co-existing elements of the water. High level of the nutrients could increase the primary production and partly low the toxicity of the heavy metals. The desorption of heavy metals in sediment obviously varied with the nutrient level in the water and with effctive order of Cd>As>Pb>Zn>Cr>Cu. There were certain correlations among the elements.
出处
《生态学杂志》
CAS
CSCD
北大核心
2000年第4期12-17,共6页
Chinese Journal of Ecology
关键词
水生态系统
富营养化
污染物
相互作用
生态效应
eutrophication, heavy metals pollution, joint action, ecological effect.
