选矿废水污染的土壤铜量与生物累积的研究

通过对花石头河沿岸研究区植物的根部、茎叶进行采样分析,探讨了土壤铜含量和铜在植物体内的累积状况。结果表明,光叶蕨、三叶鬼针草、野牡丹、紫茎泽兰4种植物体内铜含量随着土壤铜含量的增加而增加,光叶蕨增量最大。植物根部铜生物累积系数(BF)与茎叶铜生物累积系数(BF)之间相关性不显著,但根部BF为1.311,茎叶BF为0.159,前者是后者的8.2倍。光叶蕨铜的累积能力最强,其次是紫茎泽兰,植物间铜生物累积系数没有显著性差异。各采样区土壤铜含量差异大,它们之间的差异达到显著性水平。无论是全株植物、根部,还是茎叶,BF值:公路边>山坡上>河边。青蒿铜的迁移系数(TF)最大,与其余植物的迁移系数存在显著性差异,而这4种植物之间铜的迁移系数没有显著性差异,不同采样区TF均值以公路边TF值最高,其次是河边,最后才是山坡上。

Study on Soil Copper Content of Ore-dressing Wastewater Pollution and Bioaccumulation

Based on sampling and analyzing the roots&leaves of a few species plants in the sample areas along the Huashitou River,the copper content in soil and copper,bioaccumulation in plant were probed into.The results showed that,among 4 plants of Knuiwatsukia cuspidate,Bidens pilosa,Melastoma Affine D.Do and ,Eupatorium adenophorum Spreng,the copper contents in the plants increased with the copper contents in soil raising.Furthermore,the copper content of Knuiwatsukia cuspidate increased mostly.Their correlation was nonsignificant between the roots copper bioaccumulation factor(BF)and those of leaves',but the roots'BF was 1.311 and the leaves'BF was 0.159,that is,the former was 8.2 times of the latter.The Knuiwatsukia cuspidate copper enrichment capacity was the strongest in those plants and next to Eupatorium adenophorum Spreng their copper BFs were nonsignificant among them.The copper contents in soil of thesample areas were far different and the difference was significant.For the whole plants,roots or leaves,the copper BFs were as follow:the road side>on the mountain>the river bank.The copper translocation factor(TF)of Herba Artemisiae Annuae was the largest and had significant difference with others' 'and the rest plants'TFs had no significant difference.The copper TFs of different sample areas were as follow:the road sid>the river bank>on the mountain.