掺硼金刚石薄膜电极电化学氧化对铜绿微囊藻的生长抑制

阳极材料采用掺硼金刚石薄膜板状电极，研究了电化学氧化中电流密度、电解时间、pH、氯离子浓度、硫酸根离子浓度对铜绿微囊藻生长抑制的影响，以及电解前后藻细胞形态的变化。结果表明，4个影响因素对铜绿微囊藻生长抑制效果显著。抑藻效果随电流密度、电解时间的增加而增加，电流密度为17 mA/cm²时藻细胞出现破裂、细胞内物质流出的现象，抑藻效果较好；当电解时间为20 min时，可完全抑制藻细胞生长；再增大电解时间，对抑藻效果无明显促进作用，初始pH在中性及酸性条件下可完全抑制藻细胞生长。抑藻效果与溶液中氯离子、硫酸根离子浓度成正相关，当溶液中氯离子浓度为6 mg/L时，可完全抑制藻细胞生长；无氯离子时，藻细胞在4 d后出现继续增长现象。

Inhibition of Microcystis aeruginos by electrochemical oxidation on boron-doped diamond electrode

The influence of current density, electrolysis time, pH, Cl^- and SO₄^2- concentration on the inhibition of Microcystis aeruginos was investigated by Boron-doped diamond plate electrode. Algal cell morphology before and after electrochemical treatment were observed. The results show that the four factors had significant effects on the inhibition of algal cells. The inhibition of algae increase with the increase of current density and electrolysis time, which are good at 17 mA/cm² because of leading to the rupture of algae cells and outflowing of intracellular substances. Completed inhibition of algae could be obtained after 20 minutes. More than 20 minutes Electrolysis time have no obvious effect on the inhibition of algae. Completed inhibition of algae could be obtained under the initial pH in neutral and acidic conditions. The inhibition of algae increase with the concentration of Cl^- and SO₄^2- in the solution. The concentration of Cl^- of 6 mg/L could completely inhibit the growth of algae cells. The algal solution without chloride ion continue to grow after 4 days.