【摘要】 目的　探讨微量电解质 Na Cl、Na2 SO4与饮用水电化学杀菌过程中副产物三氯甲烷生成量的关系。方法　取滤后水 (三层滤料快滤池之后、投放液氯前 )分别以石墨、Ti(基 ) - Ti(以金属钛基表面涂钌氧化物作为阳极、纯钛金属作为阴极 ,以下简称为钛电极 )为电极 ,配制不同 SO42 - 和 Cl- 离子浓度的实验水样 ,在电流密度为5 m A/ cm2下电解不同时间后 ,取样分析 ,测定 CHCl3生成量。结果　加入微量电解质 Na2 SO4对 CHCl3的产生量无显著影响 ;加入微量电解质 Na Cl,CHCl3量随〔Cl- 〕的增大而增大。采用钛电极电解 10分钟后 CHCl3生成量超过了国家规定标准 ,而石墨电极电解产生的 CHCl3量比钛电极少。结论　应采用石墨为电极进行饮用水电解消毒。更多还原

【Abstract】 Objective To investigate the relation of electrolytes(NaCl,Na 2SO 4) to the by product CHCl 3 produced in the electrochemical disinfection process. Methods Taking filtering water, we used the graphite and Ti (matrix) Ti as electrodes, adjusted the current sample for analysis in different time, and determined the production of CHCl 3 under different conditions. Results Na 2SO 4 had no effect on the production of CHCl 3 in the electrolysis( P > 0.05),but NaCl had the effect and the higher the concentration of Cl - was, the more the production of CHCl 3 increased. The production of CHCl 3 increased with the length of electrolysis time, and it exceeded the national standard after 10 minutes’ electrolysis using Ti (matrix) Ti as electrodes. When graphite was used as electrodes,the production of CHCl 3 was much less. Conclusion Na 2SO 4 has no effect on the production of CHCl 3. Our suggestion is that graphite should be used as the electrodes for electrochemical disinfection of drinking water.更多还原