Study on Sudden Cadmium Pollution Emergency Treatment Tests of Drinking Water Source of Cities

The experiment is based on cadmium pollution of Long River in Hechi Guangxi. The results shows that under existing process condition of water plants, dosing PAC separately can make removal rate of Cd2+ reach about 60%, only ensuring the inflow water containing maximum 0.01 mg/L Cd2+ reach the standard when outflowed. When the inflow water concentration of Cd2+ surpasses 0.01 mg/L, existing technology is needed to be improved. If using combined treatment with sodium carbonate and PAC, in condition the dosing quantity of sodium carbonate is 1.1 times than the theoretical molar ratio, and PAC is 15 mg/L, the removal rate of Cd2+ reach higher than 90%, making the effluent which Cd2+ exceeds the standard by 10 times reach the standard after treated, providing a new idea for emergency treatment on Cd2+ pollution of drinking water.