Hassani Aydin, Karaca Canan, Karaca Semra, Khataee Alireza, Açışlı Özkan, Yılmaz Bilal
Department of Materials Science and Nanotechnology Engineering, Faculty of Engineering, Near East University, 99138 Nicosia, North Cyprus, Mersin 10, Turkey; Department of Chemistry, Faculty of Science, Atatürk University, 25240 Erzurum, Turkey.
Department of Chemistry, Faculty of Science, Atatürk University, 25240 Erzurum, Turkey.
Ultrason Sonochem. 2018 Apr;42:390-402. doi: 10.1016/j.ultsonch.2017.11.036. Epub 2017 Nov 27.
The removal of basic violet 10 (BV10), which is known as a cationic dye, from aqueous solution was studied by employing a heterogeneous sono-Fenton process over the nano-sized magnetite (FeO) which had been prepared by the milling of magnetite mineral using a high-energy planetary ball milling process. The magnetite samples were characterized using the X-ray diffraction (XRD), high resolution scanning electron microscopy (HR-SEM), energy-dispersive X-ray spectroscopy (EDX), Brunauer-Emmett-Teller (BET), Fourier transform infrared spectroscopy (FTIR), and inductively couple plasma mass spectrometer (ICP-MS). It was found that the catalytic activity of the ball-milled magnetite sample was enhanced along with the improvement in its physicochemical properties; also, the ball-milled magnetite of 6 h displayed the highest catalytic activity in BV10 removal by the heterogeneous sono-Fenton process as compared with that for 4 h (66.12% after 120 min) and 2 h (48% after 120 min).The effect of operational parameters, namely, pH solution, catalyst dosage, the initial HO concentration, ultrasonic power and the initial BV10 concentration, on the removal efficiency (RE%) of BV10 was investigated. The optimum conditions for the BV10 RE% were: the pH value of 3, the catalyst dosage of 1.5 g L, the initial HO concentration of 36 mM, the ultrasonic power of 450 W L, and the initial BV10 concentration of 30 mg L. The RE% of BV10 was 75.94% at these conditions after the reaction time of 120 min. The trapping experiments revealed that OH radicals were the dominant oxidative species, but O/HO radicals also had a partial role in the removal of BV10.The reusability of the magnetite nanoparticles revealed about 28% decrease in the removal efficiency within five consecutive runs. The results obtained through GC-MS analysis also confirmed the efficient removal of BV10 molecules in the aqueous solution during the process.
采用高能行星球磨法研磨磁铁矿矿物制备纳米级磁铁矿（FeO），通过非均相超声芬顿法研究了从水溶液中去除碱性紫10（BV10，一种阳离子染料）的过程。使用X射线衍射（XRD）、高分辨率扫描电子显微镜（HR-SEM）、能量色散X射线光谱（EDX）、布鲁诺尔-埃米特-泰勒（BET）、傅里叶变换红外光谱（FTIR）和电感耦合等离子体质谱仪（ICP-MS）对磁铁矿样品进行了表征。结果发现，球磨磁铁矿样品的催化活性随着其物理化学性质的改善而增强；此外，与4小时（120分钟后为66.12%）和2小时（120分钟后为48%）的球磨磁铁矿相比，6小时的球磨磁铁矿在通过非均相超声芬顿法去除BV10中表现出最高的催化活性。研究了操作参数，即溶液pH值、催化剂用量、初始HO浓度、超声功率和初始BV10浓度对BV10去除效率（RE%）的影响。BV10去除率的最佳条件为：pH值为3，催化剂用量为1.5 g L，初始HO浓度为36 mM，超声功率为450 W L，初始BV10浓度为30 mg L。在这些条件下反应120分钟后，BV10的去除率为75.94%。捕获实验表明，OH自由基是主要的氧化物种，但O/HO自由基在去除BV10中也起到了一定作用。磁铁矿纳米颗粒的可重复使用性表明，在连续五次运行中，去除效率下降了约28%。通过GC-MS分析获得的结果也证实了该过程中水溶液中BV10分子的有效去除。
