Study on treating lead wastewater from chemistry lab by denatured laterite and baked clay

Abstract

    The VietNam enviroment is becoming heavy polution. Wastewater from the industries and laboratories without treating flows into the sewerage system of cities. Some heavy metals such as lead in wastewater seriously affect human health. Industrial wastewater is treated by Polialuminum Cloride (PAC) and sodium hydroxide (NaOH) by automation systems. However, system area for wastewater treatment is too large and lead wastewater from labs at universities and institutes are small, so that isn't suitable with laboratory scale. Using denatured clay and activated laterite is not only friendly with the enviroment but also low cost. With 2.4 kilograms this material can absorb lead metal in 24 litters wastewater resulting reduced lead concentration from 207ppm to 0,10163 ± 0,00095ppm.