The Reactive Light Yellow Dye Wastewater Treatment by Sewage Sludge-Based Activated Carbon

The paper is aim to discuss the dye wastewater treatment by sewage sludge-based adsorbent. The adsorbent derived from sewage sludge , which produced through phosphoric acid-microwave method, and commercial activated carbon (ACC) were tested in the process of the Reactive Light Yellow dye wastewater treatment. The effects of pH value, contact time and the adsorbents´ amount on the adsorption efficiency were studied on the basis of the removal rate of COD(C_r), and the adsorption isotherm of the sewage sludge based activated carbon (ACSS) was discussed. The results indicated that the sewage sludge-based activated carbon was mesoporous with a surface area of 168 m²/g and an average pore diameter of 8.8 nm. The optimum pH of ACSS was 10, the adsorption equilibrium time of ACSS was 40 min. When the dosage of ACSS was 5 g/L, the removal rate of COD(C_r) was 92.3%, that´s means the ACSS had a good adsorption performance. The Freundlich model and Langmuir model were all fit for the Reactive Light Yellow dye wastewater adsorption.