Chemical Engineering Department, Institute of Chemical Technology, Mumbai, India.
Water Environ Res. 2024 Mar;96(3):e11011. doi: 10.1002/wer.11011.
The current study focuses on the degradation of Procion brilliant yellow H-E6G, an azo dye, using ultrasonic and hydrodynamic cavitation (HC), evaluating the impact of various parameters on the extent of degradation. The use of only ultrasound showed less oxidation capacity as indicated by only 19.1% degradation at an optimized power of 140 W, pH of 2.5, temperature of 40°C, and initial dye concentration of 15 ppm. The effectiveness of hybrid approaches involving US + H O , US + Fenton, and US + H O + potassium persulfate (KPS) was subsequently evaluated under optimized conditions. A notable enhancement in decolorization extent was observed for combined operations, including US + H O , US + Fenton, and US + H O + KPS (dual oxidant scheme) with the actual decolorization extents as 80.6%, 85%, and 92.2% respectively. An optimized scheme of US + H O + KPS was also utilized to decolorize the dye at a pilot scale using a US flow cell and also an HC reactor that yielded 91.8% and 88% reductions in initial concentration. The dye decolorization was elucidated to follow first-order kinetics for all the individual and combination approaches. The obtained values of the rate constants were also utilized for the evaluation of the synergistic index. A toxicity analysis was also performed on the dye, both before and following treatment, utilizing two bacterial strains. A comparative analysis of various treatment approaches has been presented focusing on factors such as cavitational yield, operational expenses, and energy requirements. The study elucidated that the combination of US + H O + KPS effectively removes Procion brilliant yellow H-E6G giving 92.2% as the maximum degradation at an operating cost of 0.1862 $/L. PRACTITIONER POINTS: First depiction of cavitative degradation of Procion brilliant yellow H-E6G Optimizing the equipment operating parameters and chemical oxidants Demonstration of optimized treatment scheme at pilot scale Evaluation of various approaches based on synergy and costs of treatment US + H O + KPS is the best approach for dye degradation.
本研究聚焦于 Procion 亮黄 H-E6G（一种偶氮染料）的降解，采用超声和水力空化（HC）技术，评估各种参数对降解程度的影响。仅使用超声时，氧化能力较弱，在优化功率为 140 W、pH 值为 2.5、温度为 40°C 和初始染料浓度为 15 ppm 的条件下，仅降解了 19.1%。随后，在优化条件下评估了 US+H 2 O 2 、US+Fenton 和 US+H 2 O 2 +过硫酸钾（KPS）等混合方法的效果。在联合操作中，观察到脱色程度显著提高，包括 US+H 2 O 2 、US+Fenton 和 US+H 2 O 2 +KPS（双氧化剂方案），实际脱色程度分别为 80.6%、85%和 92.2%。还使用优化的 US+H 2 O 2 +KPS 方案在中试规模下使用 US 流槽和 HC 反应器对染料进行脱色，分别获得 91.8%和 88%的初始浓度降低。所有单独和组合方法的染料脱色均遵循一级动力学。还利用获得的速率常数值评估协同指数。还对染料进行了毒性分析，分别在处理前后使用两种细菌菌株进行分析。针对各种处理方法，我们进行了包括空化产率、运营成本和能源需求等因素的比较分析。研究结果表明，US+H 2 O 2 +KPS 的组合可有效去除 Procion 亮黄 H-E6G，在运营成本为 0.1862 美元/升的条件下，最大降解率为 92.2%。
首次描述 Procion 亮黄 H-E6G 的空化降解优化设备运行参数和化学氧化剂在中试规模下展示优化处理方案基于协同作用和处理成本评估各种方法 US+H 2 O 2 +KPS 是最佳的染料降解方法。
