0 a chemical element that is a greenish-yellow gas with a strong smell, added to water in order to kill organisms that might cause infection -- 氯，氯氣
The hotel's water supply was monitored daily for residual chlorine and faecal coliforms, and samples were collected periodically for bacterial and viral testing.
Within the exposed surface cavity, peaks in the concentrations of sodium, chlorine, phosphorus and sulphur are observed.
Ozone and chlorine dioxide are powerful oxidants that produce less well-known harmful by-products, but do not provide a disinfectant residual.
Chlorine concentrations are negatively cor related with silica and are less than 0.8 %, while external inclusions exhibit the highest values.
Sanitizers evaluated have included hydrogen peroxide, sodium hypochlorite (chlorine), and ethanol.
Injection of chlorine into the stratosphere would probably be required for significant volcanic-induced ozone depletion.
The presence of free residual chlorine, on the other hand, was reported to mask the colonization rate.
In the majority of the reported cases, the water had not been treated with chlorine at all.
