Dükkancı Meral
Ege University, Engineering Faculty, Chemical Engineering Department, 35100, Bornova, Izmir, Turkey.
Ultrason Sonochem. 2018 Jan;40(Pt B):110-116. doi: 10.1016/j.ultsonch.2017.04.040. Epub 2017 May 5.
In this study, oxidation of bisphenol-A (IUPAC name - 2,2-(4,4-dihydroxyphenyl, BPA), which is an endocrine disrupting phenolic compound used in the polycarbonate plastic and epoxy resin industry, was investigated using sono-photo-Fenton process under visible light irradiation in the presence of an iron containing perovskite catalyst, LaFeO. The catalyst prepared by sol-gel method, calcined at 500°C showed a catalytic activity in BPA oxidation using sono-photo-Fenton process with a degradation degree and a chemical oxygen demand (COD) reduction of 21.8% and 11.2%, respectively. Degradation of BPA was studied by using individual and combined advanced oxidation techniques including sonication, heterogeneous Fenton reaction and photo oxidation over this catalyst to understand the effect of each process on degradation of BPA. It was seen, the role of sonication was very important in hybrid sono-photo-Fenton process due to the pyrolysis and sonoluminescence effects caused by ultrasonic irradiation. The prepared LaFeO perovskite catalyst was a good sonocatalyst rather than a photocatalyst. Sonication was not only the effective process to degrade BPA but also it was the cost effective process in terms of energy consumption. The studies show that the energy consumption is lower in the sono-Fenton process than those in the photo-Fenton and sono-photo- Fenton processes.
在本研究中，使用含钛酸镧铁（LaFeO）的钙钛矿催化剂，在可见光照射下通过超声光芬顿法研究了双酚A（IUPAC名称 - 2,2 -（4,4 - 二羟基苯基），BPA）的氧化，双酚A是一种用于聚碳酸酯塑料和环氧树脂工业的内分泌干扰酚类化合物。通过溶胶 - 凝胶法制备并在500°C下煅烧的催化剂在使用超声光芬顿法氧化双酚A时表现出催化活性，降解程度和化学需氧量（COD）降低分别为21.8%和11.2%。通过使用包括超声处理、非均相芬顿反应和在该催化剂上的光氧化在内的单独和组合的高级氧化技术研究了双酚A的降解，以了解每个过程对双酚A降解的影响。可以看出，由于超声辐射引起的热解和超声发光效应，超声处理在混合超声光芬顿过程中起着非常重要的作用。制备的LaFeO钙钛矿催化剂是一种良好的声催化剂而非光催化剂。超声处理不仅是降解双酚A的有效过程，而且就能源消耗而言也是具有成本效益的过程。研究表明，超声芬顿过程中的能源消耗低于光芬顿和超声光芬顿过程。
