Performance evaluation of acidic water treatment by using simple physicochemical method

Abstract

One of the major issues in the Mekong Delta is the severe deficit of supply water due to the ferrous, alum and acidic pollutants of water in this area. This study aims to assess the performance of some popular methods to treat acid sulfate water, such as using quicklime with a solution pH range of 6 - 8 as an operating variable. Simulated acid sulfate water samples were prepared based on studies of acid sulfate content in the water of this area. The results showed that: 1) pH of 7.5 was determined to be an optimum for Al and Fe removal as qualified standards (QCVN 01-1:2018/BYT); At any values of pH, only a small amount of Mn was ydrolysed, which means after treatment, Mn was hardly removed from the solution. The result indicated that although traditional methods can treat Al and Fe, it is necessary for the water to have further treatment as the methods cannot eliminate the entire Mn and they also may heighten the hardness of water.