Abstract

Elimination of basic blue 9 (BB-9), a cationic textile dye, by electrocoagulation coupled with biosorption exploiting pelletized natural dead leaves (PNDL) of Sapindus mukorossi, an economic alternative biosorbent, was investigated. The experimental runs were conducted in a laboratory-scale hybrid reactor loaded with Al electrodes, aeration spargers and PNDL packed twin suspended buckets. The pelletized adsorbents offer key advantages of good mechanical stability, lesser clogging risk, and easy disengagement as compared to powdered adsorbents. The parameters of current density, pH, PNDL dose, and initial dye concentration were studied for the decolorization and COD removal efficiency. The experimental results revealed that up to 99.9% decolorization and 90.01% COD removal efficiency achieved after 8 min at optimum condition of current density (j)=20.27 mA/cm², pH = 9, PNDL dose = 6 g/L, and initial dye concentration = 50 mg/L. The BB-9 elimination followed the first-order kinetics with K₁=0.318 min⁻¹ and R²=0.997. The results revealed the potential of PNDL as a feasible biosorbent with the effective performance of the coupled process.

抽象的

通过电凝聚和生物吸附利用无患子Sapindus mukorossi的颗粒状天然死叶（PNDL）消除阳离子纺织染料碱性蓝9（BB-9），一种经济的生物吸附剂替代品进行了研究。实验运行在实验室规模的混合反应器中进行，该反应器装有Al电极，曝气鼓风机和PNDL填充的双悬浮料斗。与粉状吸附剂相比，粒状吸附剂具有以下关键优势：机械稳定性好，堵塞风险小，易于脱离。研究了电流密度，pH，PNDL剂量和初始染料浓度等参数对脱色和COD去除效率的影响。实验结果表明，在最佳电流密度（j）= 20.27 mA / cm ^2的条件下，经过8分钟后，可实现高达99.9％的脱色和90.01％的COD去除效率。，pH = 9，PNDL剂量= 6 g / L，初始染料浓度= 50 mg / L。BB-9消除遵循一级动力学，K ₁ = 0.318 min ^-1和R ² = 0.997。结果表明，PNDL具有可行的生物吸附剂的潜力，并且具有偶联过程的有效性能。