用藻类生长抑制试验研究光电催化水中五氯酚毒性特征

采用96h藻类生长抑制试验考查了光电催化水中五氯酚过程中以及不同降解条件下的急性毒性变化规律．结果表明，光电催化去除五氯酚水溶液毒性的能力高于直接光解、电氧化；光电催化降解五氯酚的过程中溶液毒性逐步降低，反应2h后，溶液的毒性降低到初始毒性的11％．反应最佳条件为电解质Na2SO4浓度0．01mol／L，pH在7左右．

Toxicological characterization of photoelectrocatalytic degradation of PCP solution with alga growth inhibition test

The regularities of the acute toxicity changes during the photoelectrocatalysis process of pentachlorophenol(PCP) and toxicity reduction under different conditions were investigated with(96 h-alga) growth inhibition tests.The results indicate that photoelectrocatalysis can reduce the toxicity of PCP solution more effectively than direct photolysis and electro-oxidation.Toxicity of the treated solution decreased steadily during the photoelectrocatalysis process of PCP with a reduction of relative toxicity index to 11% of that of the starting solution after two hours of treatment.The optimum reaction conditions are as follows: the electrolyte(Na_2SO_4) concentration is 0.01 mol/L,and pH is around 7.