Article
Engineering, Environmental
Baekha Ryu, Kien Tiek Wong, Choe Earn Choong, Jung-Rae Kim, Hyunook Kim, Sang-Hyoun Kim, Byong-Hun Jeon, Yeomin Yoon, Shane A. Snyder, Min Jang
Summary: Despite extensive studies, the synergistic mechanisms between sonolysis and photocatalysis for the removal of persistent organic pollutants (POPs) remain uncertain. This study provides a proof-of-concept for the role of photoexcited electrons in splitting sonolysis-induced hydrogen peroxide into hydroxyl radicals, particularly in the bulk phase. The synergistic degradation of hydrophobic POPs in a sonophotocatalytic system varies compared to hydrophilic POPs, with different degradation patterns observed in the gas-liquid interface and bulk liquid phase.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Acoustics
Varaha P. Sarvothaman, Vijay K. Velisoju, Janardhanraj Subburaj, Mebin S. Panithasan, Shekhar R. Kulkarni, Pedro Castano, James Turner, Paolo Guida, William L. Roberts, Sanjay Nagarajan
Summary: Phenols are the main organic contaminants in industrial wastewaters, and their removal requires a combination of processes. Existing research on phenol removal lacks a sensible approach for coupling advanced oxidation processes (AOPs). This study systematically identified the best hybrid process for ZnO mediated photocatalysis of phenol, filling the knowledge gap in current literature.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Chemistry, Applied
Asude Senolsun, Erol Akyilmaz
Summary: A new non-enzymatic carbon paste biosensor was developed using Multiwalled Carbon Nanotube (MWCNT) modified Myoglobin (Mb) for the determination of Bisphenol-A (BPA). The biosensor's measurement principle is based on the inhibition effect of BPA on the heme group of myoglobin in the presence of hydrogen peroxide. Differential pulse voltammetry (DPV) method was used for measurements in a potential range of (-0.15 V & +0.65 V) with K4[Fe (CN)6] as the medium. The biosensor showed a linear range of 100-1000 μM for BPA, with a response time of 16 s and a detection limit of 89 μM.
Article
Engineering, Environmental
Sangbin Lee, Hassan Anwer, Jae Woo Park
Summary: Nanobubble and ultrasonic cavitation were used to enhance oxidation reactions of ozonation, with nanobubbles increasing ozone dissolution by a factor of 16 and ultrasonic cavitation generating hydrogen peroxide. The process achieved significant improvements in both the loss of emitted ozone and radical recombination, demonstrated by the decomposition of rhodamine B. The combination of nanobubble and ultrasonic cavitation sustained oxidizing power by continuous dissolution of ozone and successive radical generation.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Food Science & Technology
Anton Vremere, Carmine Merola, Federico Fanti, Manuel Sergi, Monia Perugini, Dario Compagnone, Milena Mikhail, Stefano Lorenzetti, Michele Amorena
Summary: This study compared the effects of bisphenol A (BPA) with cytochromes P450 (CYPs)-modulating chemicals on oxysterols levels in zebrafish embryos at 8 and 24 hours post fertilization. The results showed that BPA, similar to CYPs-modulating chemicals, caused a dose-dependent increase in total oxysterols at 24 hpf.
FOOD AND CHEMICAL TOXICOLOGY
(2022)
Article
Engineering, Environmental
Nebojsa Ilic, Afrina Andalib, Thomas Lippert, Oliver Knoop, Marcus Franke, Patrick Braeutigam, Joerg E. Drewes, Uwe Huebner
Summary: Ultrasound was used to study the degradation kinetics of hexafluoropropylene oxide-dimer acid (HFPO-DA or GenX) at four different frequencies and three power densities. GenX showed the highest degradation rate among the tested PFAS, and its degradation increased with increasing power density. No formation of known by-products was detected. Fluorine mass balance experiments confirmed that GenX defluorinated the fastest. When a mixture of all three PFAS was tested, the degradation rates were lower than in individual experiments. The study demonstrates the effective destruction of PFAS using ultrasound.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Environmental Sciences
Ritesh Patidar, Vimal Chandra Srivastava
Summary: This study highlights the importance of sonoelectroxidation technology in treating toxic and hazardous pollutants in aquatic bodies, as well as the potential of this method in improving wastewater treatment efficiency. By combining electrochemistry with power ultrasound, the mineralization degree of wastewater can be significantly increased, showing promising applications in wastewater treatment.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Min-Yeong Kim, Kyeong-Doek Seo, Honghyun Park, Rabbee G. Mahmudunnabi, Kyu Hwan Lee, Yoon-Bo Shim
Summary: An aerogel composite of reduced graphene oxide anchored on amine groups of conductive polyterthiophene is synthesized for the first time, showing excellent catalytic performance and stability for bisphenol A oxidation and hydrogen peroxide reduction.
APPLIED SURFACE SCIENCE
(2022)
Article
Engineering, Environmental
Xudong Yang, Yao Pan, Lili Ding, Bing Wu, Jinfeng Wang, Hongqiang Ren
Summary: Based on the strong adhesion principle of invertebrate mussels, this study immobilized polydopamine with multiple functional groups on graphite sheet electrodes to construct an electrocatalytic system (GS-PDA). The GS-PDA showed favorable stability in hydrogen peroxide (H2O2) yield and Bisphenol A (BPA) removal at a wide range of pH values (pH = 3-9). Under natural pH conditions (around 5.8), the GS-PDA exhibited higher efficiency in BPA removal with a 113% increase in degradation rate and an 1100% increase in H2O2 productivity compared to the control group. This innovative approach provides a way to mitigate the effects of pH on water purification and H2O2 generation, offering a strategy for wastewater treatment at neutral pH.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Henrik E. Hansen, Frode Seland, Svein Sunde, Odne S. Burheim, Bruno G. Pollet
Summary: Maintaining nanoparticle properties when scaling up a chemical synthesis is challenging. A sonochemical synthesis route can overcome this challenge by continuously generating reducing agents in-situ by ultrasonic cavitation. The role of radical scavengers is crucial in optimizing the sonochemical synthesis, and their optimum concentrations have been determined in this study. The results show that different scavengers require different concentrations for maximizing the formation rate of Ag-nanoparticles.
SCIENTIFIC REPORTS
(2023)
Article
Energy & Fuels
Zahra Askarniya, Soroush Baradaran, Shirish H. Sonawane, Grzegorz Boczkaj
Summary: Decolorization of Ponceau 4R, Tartrazine, and Coomassie Brilliant Blue was studied using hybrid processes of hydrodynamic cavitation with potassium persulfate and hydrogen peroxide. The application of the dual oxidation system under cavitation conditions showed a synergetic effect, and the different decolorization values of the dyes could be explained by their different properties. The kinetic study revealed the highest first order rate constant for HC-KPS-H2O2, indicating the effectiveness of this combined process.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Article
Engineering, Environmental
Yan Huang, Lei Yu, Pengpeng Lu, Yinghui Wei, Lili Fu, Junjun Hou, Yunqing Wang, Xiaoyan Wang, Lingxin Chen
Summary: Hydrogen peroxide (H2O2) is an important active oxygen species that plays a major role in redox balance and physiological processes. In this study, the fluorescent probe Cy-NOH2 was synthesized to detect fluctuations in H2O2 induced by BPA, revealing the impact of BPA on redox state in vivo. This study provides insight into the mechanisms of BPA in various physiological and pathological processes.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Hailing Zhao, Saier Liu, Minjing Shang, Yuanhai Su
Summary: The direct synthesis of phenol from benzene and hydrogen peroxide was investigated in a microreactor, with focus on the effects of process parameters on reaction performance. A novel method was proposed to calculate the actual residence time for the reaction process, especially at high temperatures. The activation energies for phenol synthesis, hydrogen peroxide decomposition, and p-benzoquinone formation were also determined in the study.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Engineering, Chemical
Mehran Ghiaci, Shohreh Farahmand, Kianoosh Masoomi, Maliheh Safaiee, Jalal S. Razavizadeh
Summary: In this study, Graphene Vanadic Acid (GVA) was introduced as a novel catalyst for efficient hydroxylation of benzene to phenol using hydrogen peroxide at ambient conditions. GVA, a new carbon compound, exhibited high reactivity and reusability, resulting in a remarkable yield of phenol as the sole product.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yingying Yang, Honglei Fan, Tianbin Wu, Guanying Yang, Buxing Han
Summary: Phenol in waste water poses a threat to human health and is resistant to natural decomposition. In this study, tungstate ionic liquids were designed and prepared, and it was found that dodecyltrimethylammonium tungstate could efficiently catalyze the degradation of phenol into gases and water under mild conditions. The tungstate anion exhibited excellent catalytic oxidative activity, and the long carbon chain group connected with the cation of the ionic liquid facilitated the complete degradation of phenol at mild conditions. Increasing the amount of hydrogen peroxide enhanced the total degradation of phenol. Furthermore, the ionic liquid showed excellent thermal stability and could be reused. This work presents a novel strategy for the efficient treatment of phenol-containing waste water.
GREEN ENERGY & ENVIRONMENT
(2023)