1. Calcium hydroxide is used in wastewater to neutralize free acid in wastewater.
2. Calcium hydroxide is used in wastewater to neutralize acid salts in wastewater.
3. Calcium hydroxide is used in wastewater, during which hydroxide ions in calcium hydroxide can react with metal ions to produce water-insoluble precipitates.
4. The use of calcium hydroxide in wastewater can adjust the pH value of wastewater to alkaline, which can better precipitate metal hydroxide.
