Study on Adsorption of Dye Wastewater by Modified Fly Ash

Used fly ash as raw material, it was modified by acid, alkali and high temperature to produce adsorbent, sulfuric acid sodium hydroxide adsorbent adsorbent. In this paper, the effects of dosage, adsorption time, initial dye concentration, wastewater pH on were studied. The results showed that: had a good treatment effect dye; when dosage 1.00 g, time 90 min, 4, 45 °C, decolorization rate 60 mg/L methyl orange can reached more than 70%; 0.20 3, 35 20 be achieved. Congo red 80%.