[Relations of electrolytes to the by-product CHCl3 produced in electrochemical disinfection].
OBJECTIVE
To investigate the relation of electrolytes(NaCl, Na2SO4) to the by-product CHCl3 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 CHCl3 under different conditions.


RESULTS
Na2SO4 had no effect on the production of CHCl3 in the electrolysis(P > 0.05). but NaCl had the effect and the higher the concentration of Cl- was, the more the production of CHCl3 increased. The production of CHCl3 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 CHCl3 was much less.


CONCLUSIONS
Na2SO4 has no effect on the production of CHCl3. Our suggestion is that graphite should be used as the electrodes for electrochemical disinfection of drinking water.
Jia
C
C
Department of Laboratory Medicine, First Medical School, WCUMS, Chengdu 610041, China.
Zhang
B
B
Chen
R
R
D002725:Chloroform / Q000032:analysis*; D004563:Electrochemistry; D004566:Electrodes; D004573:Electrolytes; D006801:Humans; D012965:Sodium Chloride; D013431:Sulfates; D018508:Water Purification / Q000379:methods*; D014881:Water Supply
D004573:Electrolytes; D013431:Sulfates; C012036:sodium sulfate; D012965:Sodium Chloride; D002725:Chloroform