| 摘要 |
There is disclosed a method for the treatment of confined bodies of water such as a swimming pool to remove scale deposits from the surfaces of the vessel containing the water. The water is acidified with a mixture of hydrochloric acid, sulfamic acid and sodium bisulfate to eliminate its total alkalinity, as determined by a standard neutralization test. The water is continuously or repeatedly monitored for total alkalinity following the initial addition of acid, to insure that sufficient acid has been added. The acidified water has a tendency to gain total alkalinity as the scale deposits are removed during the treatment, and monitoring detects this change, permitting correction by addition of acid. After the treatment with the acid, which can last from several hours to several days, any excess treatment acid is neutralized by the addition of a neutralizing agent which is preferably magnesium oxide or magnesium hydroxide. The netralizing agent is added to neutralize the acid and is added in a quantity which does not increase the pH of the pool to a value above about 7.8 to 8.5. It has been observed that the addition of magnesium oxide or hydroxide to the pool without exceeding the aforementioned pH effectively neutralizes the excess treatment acids without contributing to total alkalinity and thereby avoids the tendency of the pool to rescale immediately following treatment.
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