Article
Chemistry, Physical
Marta Bettoni, Stefano Falcinelli, Cesare Rol, Marzio Rosi, Giovanni Vittorio Sebastiani
Summary: An experimental and theoretical investigation was conducted on the microscopic mechanism of VOCs photocatalytic elimination by TiO2, revealing the involvement of an electron transfer step as the rate-determining one. K and k values for various VOCs were determined through experiment and calculations, providing new insights into the process.
Article
Chemistry, Physical
Victoria D. S. Freitas, Ana Paez, Pascal Fongarland, Regis Philippe, Lea Vilcocq
Summary: This paper investigates the hydrogenation of different sugars derived from hemicelluloses using a Ru/TiO2 catalyst. The study explores the effects of temperature, pressure, sugar concentration, and catalyst amount on xylose hydrogenation, and proposes a Langmuir-Hinshelwood kinetic model. Comparative analysis of five hemicellulose sugars reveals that the sugar structure significantly impacts the hydrogenation rate, with hexoses reacting slower than pentoses.
Article
Engineering, Chemical
Dmitry Yu. Murzin
Summary: This paper investigates the cooperative kinetics of heterogeneous catalytic reactions on nanoclusters or in a nanoconfined space, including Eley-Rideal and Langmuir-Hinshelwood mechanisms as well as reaction mechanisms with two kinetically significant steps. The results show that lateral interactions between adsorbed species have an impact on the kinetic behavior of the reactions, and larger clusters and nanoconfined spaces with multiple adsorbed species exhibit different kinetic behavior compared to conventional treatments.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Jordi H. Badia, Carles Fite, Roger Bringue, Fidel Cunill, Javier Tejero
Summary: The kinetics of the simultaneous synthesis of ETBE and BTBE over A35 catalyst in the liquid phase was investigated. Various kinetic modeling approaches were compared, and it was found that empirical power-law modeling provided the best fit, while mechanistic modeling explained the reaction mechanisms.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Environmental Sciences
Reeti Kumar, Liya George, Zhao Jun, Suparna Mukherji
Summary: Heterogeneous photocatalysis using graphene oxide-TiO2 nanocomposite (GOT) was effective in removing dichlorvos and malathion pesticides from water. Optimum results were achieved at pH 6 and a catalyst dose of 60 mg/L, with high degradation rates and mineralization levels observed under UV irradiation.
Article
Engineering, Chemical
Minaz Makhania, Sreedevi Upadhyayula
Summary: A heterogeneous model of the foam unit cell was prepared using BCC geometry to study reaction and diffusion in foam-based catalysts. Kinetic expressions like general order kinetics with an order of 0.5 and Langmuir-Hinshelwood-Hougen-Watson (LHHW) kinetics for isothermal and nonisothermal catalyst wall cases were studied using finite element method-based simulations. It was observed that by using foam diffusion length and a modified Thiele modulus, the effectiveness factor vs Thiele modulus relationship assumes a form similar to that of Aris' relationship.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Environmental
Elaheh Hojaji, Matjaz Valant, Anna-Karin Axelsson
Summary: A newly developed hydrogen generation model incorporating both adsorption and irradiation mechanisms for a 10-LED photoreactor is presented and validated against experimental data. The model is based on Langmuir-Hinshelwood kinetics and Radiative Transport Equation, successfully predicting photocatalytic hydrogen production with minor computational effort.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Navneet Kumar, Swati Verma, Jinsub Park, Vimal Chandra Srivastava, Mu. Naushad
Summary: In this study, capped and uncapped ZnS nanoparticles were compared, and it was found that the capped ZnS nanoparticles had smaller crystallite size and higher band gap energy, making them suitable as solar photocatalysts. The capped ZnS nanoparticles showed better performance and faster degradation kinetics in degrading methyl orange dye. The proposed dye degradation mechanism suggested that reactive oxygen species generated by photogenerated electron-hole pairs facilitated the degradation of dye molecules.
Review
Engineering, Chemical
Santosh Kumar Singh, Pradeep Kumar Mishra, Siddh Nath Upadhyay
Summary: The widespread use and long half-life of pesticides have led to their accumulation in the environment beyond acceptable levels. Photocatalytic degradation, particularly using titanium dioxide, is considered the most promising method for degrading pesticides and other organic pollutants. This review provides a critical summary of research findings in the past two decades and identifies future research opportunities in this field.
REVIEWS IN CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Sagar D. Chaudhary, Shardul S. Rahatade, Sunil S. Joshi, Nilesh A. Mali
Summary: This article reports the synthesis of dime-thylformamide (DMF) using ruthenium doped Mg/Al calcined hydrotalcite by CO2 hydrogenation in the presence of dimethylamine (DMA). The optimized conditions achieved complete conversion of dimethylamine with a yield of more than 92%. The catalyst properties, surface morphology, and kinetic modeling were thoroughly investigated.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Applied
Young-Sang Cho, Thi Thu Hien Nguyen, Hoai Han Nguyen, Quang Hai Tran
Summary: In this study, effectiveness factor of hollow cylindrical pellets with finite length was derived by assuming Langmuir-Hinshelwood (LH) kinetics. The key factors affecting the effectiveness factor were investigated, and the reaction parameters in LH kinetics were determined by comparing the modeling results with experimental data. This study is of great importance for the design and optimization of catalytic reactors.
Article
Engineering, Chemical
Nitika Tiwari, Sankha Chakrabortty, Kundan Samal, Sanjib Moulick, Benu Gopal Mohapatra, Sasmita Samanta, P. K. Mohapatra, Kali Sanjay, Jayato Nayak, Shirsendu Banerjee, Suraj K. Tripathy
Summary: The present study focused on the degradation of malachite green (MG) dye using a sustainable and novel low-cost material synthesized from waste fecal sludge. The material, biochar obtained from the fecal sludge, was impregnated with TiO2 and ZnO nanoparticles to enhance its functional properties. Under optimized conditions, the BC-TiO2-ZnO photocatalyst showed a removal efficiency of nearly 98% for MG dye in aqueous solution through a combined effect of adsorption and photocatalysis. The photocatalyst demonstrated good reusability and its degradation efficiency remained stable even after six cycles. The treated water obtained from the process showed no remarkable antibacterial activity against E. coli.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Xin Zhong, Xinmeng Liang, Xinyu Lin, Jin Wang, Malik Zeeshan Shahid, Zhengquan Li
Summary: The researchers developed a new CsPbBr3-Co3O4 heterostructure photocatalyst with effective charge separation for efficient CO2 reduction. The CsPbBr3-Co3O4 composite showed a significantly enhanced evolution rate of CO and CH4 compared to pristine CsPbBr3 or Co3O4. The high activity was mainly attributed to efficient charge separation and directional electron transfer. Additionally, the unique surface features of the composite facilitated CO2 adsorption and electron accumulation at the Co3O4 site, promoting CO2 conversion. This study provides a strategy for designing active photocatalysts and constructing heterointerfaces for CO2 reduction.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Engineering, Chemical
Emmanuel O. Ichipi, Shepherd M. Tichapondwa, Evans M. N. Chirwa
Summary: Ag/Ag2S-ZnO nanocomposites were prepared via a simple hydrothermal process followed by a plasmonic Ag' reduction through a photo-deposition method, achieving efficient photocatalytic degradation performance.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Engineering, Environmental
Julie Hot, Erick Ringot, Lounes Koufi, Alexandra Bertron
Summary: Real-life experiments were conducted in a 10m3 chamber to study the abatement of nitrogen monoxide. Two models, a three-flow model and a four-flow model, were used to characterize leakage flow rate and photocatalytic oxidation of NO, respectively. Parameters for the rate law were identified using a standardized lab-scale reactor and the experimental results were correctly fitted with finite differences integration.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Shun-Shun Chen, Xu-Xiu Chen, Tian-Yu Yang, Li Chen, Zheng Guo, Xing-Jiu Huang
Summary: A temperature-modulated sensing strategy was proposed to identify and determine BTEX compounds. Highly effective identification of BTEX was achieved using linear discrimination and convolutional neural network analyses. Additionally, quantitative analysis of concentration was accomplished by establishing the relationship between concentration and response.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Myungkyung Noh, Jeong Yeon Sim, Jisung Kim, Jee Hwan Ahn, Hye-Young Min, Jong-Uk Lee, Jong-Sook Park, Ji Yun Jeong, Jae Young Lee, Shin Yup Lee, Hyo-Jong Lee, Choon-Sik Park, Ho-Young Lee
Summary: This study reveals that chronic exposure to PM induces chronic inflammation and development of COPD by dysregulating NAD+ metabolism and subsequent SIRT1 deficiency in pulmonary macrophages. Activation of SIRT1 by resveratrol effectively mitigates PM-induced inflammation and COPD development. Targeting metabolic and epigenetic reprogramming in macrophages induced by PM is a promising strategy for COPD treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yu Liu, Linlin Qin, Yiming Qin, Tong Yang, Haoran Lu, Yulong Liu, Qiqi Zhang, Wenyan Liang
Summary: Co/NC/PAC electrode was prepared by compounding ZIF-67 with powder-activated carbon for the electrocatalytic treatment of nitrogen-containing heterocyclic compounds. The degradation efficiency of the four compounds reached 90.2-93.7% under optimal conditions, and the degradation order was pyridazine < pyrimidine < pyrazine < pyridine.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Julien Couturier, Pierre Tamba Oulare, Blanche Collin, Claire Lallemand, Isabelle Kieffer, Julien Longerey, Perrine Chaurand, Jerome Rose, Daniel Borschneck, Bernard Angeletti, Steven Criquet, Renaud Podor, Hamed Pourkhorsandi, Guilhem Arrachart, Clement Levard
Summary: This study analyzes the properties of bauxite residue samples and explores the influence of bauxite ore origin, storage conditions, and storage time. The results show that the speciation of yttrium is related to the origin of bauxite ore, while no significant variation was observed with storage conditions or aging of the residues.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Sakthinarenderan Saikumar, Ravi Mani, Mirunalini Ganesan, Inbakandan Dhinakarasamy, Thavamani Palanisami, Dharani Gopal
Summary: Microplastic contamination in marine ecosystems poses a growing concern due to its trophic transfer and negative effects on marine organisms. This study investigates the transfer and impacts of polystyrene microplastics in an estuarine food chain. The results show that microplastics can be transferred through the food chain, although the transfer rates are low. The exposed organisms exhibit stress responses, suggesting the potential risk of microplastics reaching humans through the food chain.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Engineering, Environmental
Yan-Jiao Li, Ying Yuan, Wen-Bing Tan, Bei-Dou Xi, Hui Wang, Kun-Long Hui, Jia-Bao Chen, Yi-Fan Zhang, Lian-Feng Wang, Ren-Fei Li
Summary: This review investigated and analyzed the distribution, composition, and abundance of heavy metals and antibiotic resistance genes (ARGs) in landfill. The results showed that heavy metals have lasting effects on ARGs, and complexes of heavy metals and organic matter are common in landfill. This study provides a new basis to better understand the horizontal gene transfer (HGT) of ARGs in landfill.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Jessy Joseph, Ari Vaisanen, Ajay B. Patil, Manu Lahtinen
Summary: Efficient and environmentally friendly porous hybrid adsorbent beads have been developed for the removal of arsenic from drinking water. The structural tuning of the adsorbents has been shown to have a significant impact on their adsorption performance, with high crystallinity leading to increased adsorption capacity and selectivity towards As5+.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yangyang Liu, Minhua Xiao, Kaiqin Huang, Juntao Cui, Hongli Liu, Yingxin Yu, Shengtao Ma, Xihong Liu, Meiqing Lin
Summary: This study measured the levels of phthalate metabolites in breast milk collected from mothers in southern China. The results showed that phthalates are still prevalent in the region, and breastfeeding contributes to phthalate intake in infants. However, the levels detected do not pose significant health risks to infants based on dietary exposure. The increasing exposure to certain phthalates calls for further research into their sources and potential risks.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhiqiang Wu, Jianxing Sun, Liting Xu, Hongbo Zhou, Haina Cheng, Zhu Chen, Yuguang Wang, Jichao Yang
Summary: Ocean depth affects microbial diversity, composition, and co-occurrence patterns of microplastic microbial communities. Deterministic processes dominate the assembly of mesopelagic plastisphere microbial communities, while stochastic processes shape the assembly of bathypelagic microbial communities. The relationships between microorganisms in the mesopelagic layer are more complex and stable, with Proteobacteria and Actinobacteriota playing important roles.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Tingting Xiao, Renjie Chen, Chen Cai, Shijie Yuan, Xiaohu Dai, Bin Dong, Zuxin Xu
Summary: Based on the efficiency of catalytic ozonation techniques in enhancing sludge dewaterability, this study investigated its effectiveness in simultaneous reduction of antibiotics and antibiotic resistance genes. The results showed that catalytic ozonation conditioning changed the distribution of antibiotics and achieved high degradation rates. It also significantly reduced the abundance of ARGs, inhibited horizontal gene transfer, and decreased the signal transduction of typical ARGs host bacteria.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yang Deng, Xiaohong Guan
Summary: This article discusses two different development approaches for ferrate(VI) technology in water treatment, arguing that process integration is a promising method that can drive technological innovation and revolution in water treatment, achieving higher treatment efficiency, reduced costs and energy consumption, and a smaller physical footprint.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhe Zhang, Lu Zhang, Zhihao Huang, Yuxin Xu, Qingqing Zhao, Hongju Wang, Meiqing Shi, Xiangnan Li, Kai Jiang, Dapeng Wu
Summary: In this study, a floating catalytic foam was designed and prepared to enhance the mass transfer in immobilized photocatalysts for wastewater treatment. The floating catalytic foam could float on the water surface and establish a temperature gradient, effectively promoting the diffusion and adsorption of target molecules during the photocatalytic process.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Muhammad Nafees, Adiba Khan Sehrish, Sarah Owdah Alomrani, Linlin Qiu, Aasim Saeed, Shoaib Ahmad, Shafaqat Ali, Hongyan Guo
Summary: The accumulation of cadmium and antibiotics in edible plants and fertile soil is a worldwide problem. This study investigated the potential of zinc oxide nanoparticles to alleviate the toxicity of both cadmium and antibiotics and promote spinach growth.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Lurui Wan, Kai Wang, Yuan Chen, Zhiyong Xu, Wenbo Zhao
Summary: In this study, a low viscosity and high thermal stability SO2 absorbent with dual interacting sites was successfully synthesized. The absorbent showed the highest absorption enthalpy change and entropy change values among reported SO2 absorbents, and exhibited lower viscosity and comparable thermal stability to ILs.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhengwei Zhou, Guojie Ye, Yang Zong, Zhenyu Zhao, Deli Wu
Summary: This study utilized Mo powder and STPP to enhance the performance of the sodium percarbonate system in pollutant degradation. The presence of Mo and STPP resulted in a higher degradation rate of the model pollutant SMX, with low oxidant consumption. The system generated multiple active species through a series of chain reactions at different pH values, exhibiting excellent performance towards electron-rich pollutants. Furthermore, Mo demonstrated excellent stability and reusability.
JOURNAL OF HAZARDOUS MATERIALS
(2024)