Article
Engineering, Chemical
Yiang Fan, Ying Zhou, Liyuan Zhang, Yong Feng, Kaimin Shih
Summary: A novel CoP2 catalyst encapsulated in carbon was synthesized and used for the degradation of norfloxacin, showing significant efficiency. The CoP2@NPC exhibits little interference from certain substances in the environment, but is affected by HCO.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
Ting Sun, Bingni Gu, Xiaolan Wang, Yi Wang, Yan Long, Guangyin Fan
Summary: In this study, a microwave-engaged solid method was developed to synthesize carbon black supported Co3O4 composite (Co3O4/CB) for the degradation of ciprofloxacin (CIP) via activating peroxymonosulfate (PMS). The Co3O4/CB-50 prepared by microwave irradiation for 50 s showed excellent degradation performance, removing 95% of CIP (20 mg/L) in 30 min. This study offers a unique method to synthesize high-performance, environment-friendly, and low-cost catalysts for PMS activation toward antibiotic degradations.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Shuang Zhai, Qing Zheng, Mingqiao Ge
Summary: The study investigated the application of the Co3O4@illite catalyst for PVA degradation, revealing its excellent stability and activity. The best PVA removal efficiency was achieved under optimal reaction conditions. The research provides a new perspective for the design of natural-mineral-based catalysts for effective waste treatment.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Mohammad Javad Amiri, Alireza Faraji, Morteza Azizi, Bahareh Goudarzi Nejad, Mohammad Arshadi
Summary: In this study, ostrich bone waste (OBW) was modified with hydrogen peroxide to produce OBW/HP with excellent chemical and mechanical strength as a sustainable catalyst for recovering heavy metal ions from industrial wastewater and degrading dyes. The modified OBW showed promising results in activating peroxymonosulfate, removing various dyes, and degrading organic buffers. The materials also exhibited advantages such as low cost, sustainability, high stability, no metal leaching, and recyclability.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Chemistry, Physical
Pijun Duan, Xinning Liu, Binhua Liu, Muhammad Akram, Yanwei Li, Jingwen Pan, Qinyan Yue, Baoyu Gao, Xing Xu
Summary: The presence of phosphate was found to increase the effectiveness of PMS activation for pollutants removal in AOPs, promoting the generation of SO4 center dot- through efficient breaking of the O-O bond of PMS. The yields of SO4 center dot- were linearly dependent on phosphate concentration, while the yields of .OH remained constant.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Environmental Sciences
Kubra Ulucan-Altuntas, Senem Yazici Guvenc, Emine Can-Guven, Fatih Ilhan, Gamze Varank
Summary: This study investigated the degradation of oxytetracycline by heat-activated peroxydisulfate and peroxymonosulfate processes. Response surface methodology was used to evaluate the effect of process parameters on oxytetracycline removal efficiency, showing significant results for both processes. The predicted oxytetracycline removal efficiencies for the PDS and PMS processes were 89.7% and 84.0%, respectively, with the PDS process having higher kinetic constants at all pH values than the PMS process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Liu-Xi Yang, Jia-Cheng E. Yang, Ming-Lai Fu
Summary: Porous magnetic CoFe2O4 nanocrystals were synthesized using bimetal-organic framework as a precursor and used as catalysts for the removal of chloramphenicol. The CoFe2O4 NCs showed high degradation efficiency and removal of total organic carbon during the removal of CAP.
Article
Engineering, Environmental
Aydin Hassani, Paria Eghbali, Fayyaz Mahdipour, Stanislaw Waclawek, Kun-Yi Andrew Lin, Farshid Ghanbari
Summary: In this study, a CFO-rGO nanocomposite was synthesized and used to activate PMS under UVA-LED irradiation for BPA treatment. The CFO-rGO was characterized by various analytical techniques and its performance, operating factors, reactive species, and mechanism were investigated. The results showed that CFO-rGO exhibited efficient degradation of BPA under mild conditions, with high potential for recyclability and stability.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Lylia Amirache, Fatiha Barka-Bouaifel, Priyakshree Borthakur, Manash R. Das, Hania Ahouari, Alexandre Barras, Baghdad Ouddane, Sabine Szunerits, Rabah Boukherroub
Summary: The study prepared a cobalt sulfide-reduced graphene oxide nanocomposite and achieved rapid elimination of organic pollutants in water at room temperature. Various operating parameters were systematically studied for their effects on degradation efficiency, revealing the significant role of sulfate radicals in the catalytic process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Lili Liu, Haosheng Mi, Meng Zhang, Feifei Sun, Rui Zhan, Hanbin Zhao, Siqi He, Lei Zhou
Summary: CoFe2O4 magnetic nanoparticles were used as heterogeneous catalysts to activate PMS for efficient removal of MOX. The degradation of MOX followed a pseudo-first order kinetic reaction equation, with SO4•- playing a dominant role in the degradation process. Five probable degradation pathways of MOX were proposed based on identified intermediates, and the presence of certain ions had negative effects on MOX removal efficiency.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Rajan Arjan Kalyan Hirani, Hong Wu, Abdul Hannan Asif, Nasir Rafique, Lei Shi, Shu Zhang, Zhentao Wu, Lai -Chang Zhang, Shaobin Wang, Yu Yin, Martin Saunders, Hongqi Sun
Summary: Membrane separation and sulfate radicals-based advanced oxidation processes (SR-AOPs) can be combined to efficiently remove organic pollutants. Immobilizing metal oxide catalysts on ceramic membranes can enhance membrane separation technology by enabling catalytic oxidation without the need for recovering suspended catalysts. Co3O4 ceramic catalytic membranes with different Co loadings were successfully fabricated and demonstrated uniform distribution of Co3O4 nanoparticles for catalytic oxidation of 4-hydroxybenzoic acid (HBA). Mechanistic studies identified both SO4 center dot- and (OH)-O-center dot as reactive radicals, with SO(4)(center dot-) playing the dominant role in the catalytic process.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Yongfang Rao, Chuanyi Zhou, Puqiu Wu, Jiahui Fan, Yuanyuan Zhang, Honghui Yang, Shengyan Pu
Summary: This study prepared Bi2Fe4O9 (BFO) nanosheet with super high activity toward peroxymonosulfate (PMS), confirming the generation of reactive species in the BFO/PMS system. However, the contribution of reactive species to the elimination of organic pollutants and the effect of water matrices on the removal of organic pollutants depend on their molecular structure. This study broadens our knowledge on the activation mechanism of PMS by iron-based heterogeneous catalysts.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Haiqing Zhang, Richard Lee Smith Jr, Haixin Guo, Xinhua Qi
Summary: Ordered mesoporous carbon materials (OMC-Co-Tx) functionalized with catalytically-active metals were synthesized through evaporation-induced self-assembly and calcination at (600 to 800) degrees C. These materials were then used as activators for peroxymonosulfate (PMS) to remove sulfamethoxazole (SMX) from aqueous solutions. The increase of calcination temperature improved the catalyst behavior, resulting in better SMX degradation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Jiahao He, Junyou Wu, Yujie Zhang, Qin Yang, Yingchun Yang
Summary: In recent years, the abuse of antibiotics has become a significant environmental problem. This study focused on developing a highly efficient technology for treating antibiotic pollutants using Mn-doped zeolitic imidazolate framework-67 (Mn-ZIF67) nanocrystals. The results showed that Mn-ZIF67 effectively activated peroxymonosulfate (PMS) for the degradation of norfloxacin (NOR), achieving a removal rate of 85% and a mineralization rate of 42% within 30 minutes. Furthermore, the material exhibited good recycling performance and could achieve a 70% NOR degradation rate after 5 cycles. LC-MS analysis revealed three possible degradation pathways of NOR. This work highlights the catalytic efficiency of Mn-ZIF67 and its potential as a new material for organic wastewater treatment.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Chemical
Jaemin Choi, Hyoung-il Kim, Jaesang Lee, Hongshin Lee
Summary: The study found that hexanitrocobaltate showed superior performance in peroxymonosulfate activation compared to Co2+, mainly due to the role of NO2- ligands in enhancing the activation capacity of Co(II) for PMS and facilitating the conversion of Co(III) to Co(II) through hydrolysis.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)