重金属、螯合剂以及铁、锰离子对叉边金藻生长的影响及其混合效应

THE EFFECTS OF HEAVY METAL, CHELATOR AND Fe^(3+), Mn^(2+) IONS ON THE DIVISION OF DICRATORIA AND THE COMBINATION EFFECTS OF THEM

采用微藻一次培养实验,研究了铜、锌、镉离子,微藻渗出物,螯合剂EDTA对叉边金藻生长的影响。铜、镉,对叉边金藻的毒性较强,锌较弱。螯合剂EDTA对叉边金藻的生长有促进作用。混合实验表明,铁、锰离子,EDTA都能有效地降低铜的毒性;藻渗出物也能在一定程度上缓解铜的毒性;镉、锌对铜的毒性有拮抗效应。此外,通过测定介质和细胞铜的含量,研究了铜在细胞表面的吸附行为,并在铜致毒机理以及其他化学因子的去毒机理方面作了探讨。

The toxic effect of copper ions on Dicratoria growth is studied. In the combination experiments, the antagonisms of Cd2 + and Zn2 + ions to the Cu2 + ion toxicicy are found; Fe3+ Mn2+ ions, chelator (EDTA) and algae exudates can effectively relax the toxicity of copper ions on algae cells. In addition, the adsorption behaviour of copper ions on algae cells is studied, and the toxic mechanism of copper to algle cells is discussed.