Utilization of Electro-coagulated Sludge from Wastewater Treatment Plant data as an Adsorbent for Direct Red 28 Dye Removal

Electro-coagulated, EC, sludge from the electrochemical processes of textile wastewater treatment plant can be reuse as an adsorbent for a certain cationic and anionic azo dyes from textile and or leather industry effluents. Because EC sludge expected to have iron oxide and hydroxide during the electrochemical processes of wastewater treatment, it can be used for adsorptions for azo dye removal. Produced EC sludge can have positively charged surface, specially ferric and or ferrous surface charge. Thus, EC sludge as an adsorbent will have adsorption potential to adsorb acidic (anionic) dyes in the principles of electrostatic attraction. To this study, the author intends to use direct red 28 (DR28) dyes as a modal azo dye from the textile and or leather industry. Basic batch adsorption parameters (effect of dye concentration, solution pH, reaction temperature, mixing time and adsorbent dosage), as well as adsorption isotherm, kinetics, and thermodynamics study on to raw and calcined EC sludge were investigated. DR28 dye on to calcined EC adsorbent has recorded as highly removal efficiency at pH of 2, initial dye concentration of 20mg/L, time of 60 min, adsorbent dosage 1g/100mL and temperature of 25±2℃, ambient temperature.

本研究数据集涉及通过电化学处理纺织废水过程中产生的电凝聚污泥（Electro-coagulated, EC污泥）。该污泥在处理过程中预计会含有氧化铁和氢氧化物，因此可作为吸附剂从纺织或皮革工业废液中去除特定的阳离子和阴离子偶氮染料。由于电凝聚污泥表面可能带正电荷，尤其是三价铁和或二价铁的表面电荷，因此作为一种吸附剂，它对酸性（阴离子）染料具有静电吸引的吸附潜力。本研究旨在以直接红28（DR28）染料作为纺织或皮革工业中偶氮染料的代表，探讨基本批量吸附参数（包括染料浓度、溶液pH、反应温度、混合时间和吸附剂量）的影响，以及原污泥和煅烧污泥的吸附等温线、动力学和热力学研究。在pH值为2、初始染料浓度为20mg/L、吸附时间为60分钟、吸附剂量为1g/100mL、温度为25±2℃的环境条件下，DR28染料在煅烧电凝聚吸附剂上的去除效率记录为极高。