重金属及其形态对斜生栅藻生长的影响

Effects of heavy metals and complex on senedesmus obliquus

采用均匀设计方法设计实验,研究了Cu2+,Pb2+,Zn2+3种重金属离子以及与EDTA、三聚磷酸钠、柠檬酸形成的络合物对斜生栅藻生长量的影响.通过对实验结果进行回归分析,表明了重金属离子及其形态与斜生栅藻生长量的关系.当柠檬酸、三聚磷酸钠和EDTA的浓度分别为0,5.0×10-3,1.0×10-3mol/L时,Cu,Zn,Pb分别抑制斜生栅藻生长的144h-LC50为4.791×10-6,1.128×10-2,1.06×10-4mol/L.从重金属抑制斜生栅藻生长的144h-LC50考虑,3种重金属对斜生栅藻毒害作用由大到小的顺序依次是Cu,>Zn,>PB>:柠檬酸和三聚磷酸钠能加强重金属对斜生栅藻的毒害作用;重金属对斜生栅藻的毒害作用随EDTA的增加而受到抑制.

The experiment was arranged by the uniform design.It was studied the effect of heavy metals and heavy metal complexes on senedesmus obliquus s growth.Through experimental data statistics and regression, the function relationship between the results of the experiment, OD484?nm and factors of Cu,Zn,Pb,EDTA,C6H8O7·H2O,Na5P3O10 was discussed.It was found that the 144?h-LC?50 of Cu,Zn and Pb were 4.791×10-6,1.128×10-2,1.06×10-4mol/L when the concentrations of C6H8O7·H2O,Na5P3O10 and...