ACID RAIN NEUTRALIZING BLOCK, METHOD OF MAKING SUCH BLOCKS AND METHOD OF NEUTRALIZING ACIDIFIED SURFACE WATER

摘要

Blocks, weighing about 35 lbs., formed of ahomogenous mixture of about 75% gypsum and 25% lime, arestrategically placed in surface water that is beingdamaged by acid rain, where, by timed release of lime,the pH of the water is maintained at about 6.5 pH.