| 摘要 |
<p>There is disclosed a method for the treatment of confined bodies of water such as a swimming pool by the addition of small particles of magnesium oxide or hydroxide to the pool. The magnesium oxide neutralizes acidity in the water without contributing to total alkalinity and thereby avoids the tendency of the pool to rescale immediately following treatment. When the pool is badly scaled before treatment, it can be treated to remove scale deposits by acidifying the water 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, excess treatment acid is neutralized by the addition of magnesium oxide or magnesium hydroxide. The neutralizing agent is added to neutralize the acid to increase the pH of the pool to a value above about 7.8 to 8.5.</p> |
