ABSTRACT

This work highlights the potential of corncob biochar (CCBC) and Brevibacillus parabrevis for the decolorization of brilliant green (BG) dye from synthetically prepared contaminated wastewater. The CCBC was characterized by proximate, Fourier-transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and Brunauer–Emmett–Teller analysis, respectively. Different parameters affecting the adsorption process were evaluated. The experimental results were analyzed by the Langmuir and Freundlich isotherm models. Kinetic results were examined by different models; pseudo-second-order model has shown the best fit to the experimental data. Anew positive values of ΔH^o (172.58 kJ/mol) and ΔS^o (569.97 J/K/mol) in the temperature range of 303–318 K revealed that the adsorption process was spontaneous and endothermic. The present investigation showed that the bacteria immobilized with CCBC showed better BG dye degradation. The kinetic parameters, μ_max, Ks, and μ _max, were found to be 0.5 per day, 39.4 mg/day, and 0.012 L/mg/day using Monod model, respectively. The adsorbent with bacteria showed good potential for the removal of cationic BG dye and can be considered for the remediation of industrial effluent.

摘要

这项工作突出了玉米芯生物炭 (CCBC) 和短短芽孢杆菌从合成制备的污染废水中脱色亮绿 (BG) 染料的潜力。CCBC 分别通过近似、傅里叶变换红外光谱、扫描电子显微镜、X 射线衍射和布鲁诺-埃米特-泰勒分析进行表征。评估了影响吸附过程的不同参数。实验结果由 Langmuir 和 Freundlich 等温线模型分析。动力学结果由不同的模型检验；伪二阶模型已显示出与实验数据的最佳拟合。ΔH ^o (172.58 kJ/mol) 和ΔS ^{o 的}新正值 (569.97 J/K/mol) 在 303-318 K的温度范围内 表明吸附过程是自发和吸热的。目前的研究表明，用 CCBC 固定的细菌表现出更好的 BG 染料降解。动力学参数，μ_最大，KS，和μ_最大，被认为是每天0.5，39.4毫克/天，并且使用莫诺模型0.012 L /毫克/天，分别。含菌吸附剂在去除阳离子BG染料方面表现出良好的潜力，可考虑用于工业废水的修复。