Review
Biotechnology & Applied Microbiology
Ashish Pathak, Hanadi Al-Sheeha, R. Navvamani, Richa Kothari, Meena Marafi, Mohan S. Rana
Summary: This review article explores the potential of using different microorganisms to extract PGMs from spent petroleum refinery catalysts and spent automobile catalysts. The article discusses the process parameters and challenges associated with cyanogenic bioleaching.
REVIEWS IN ENVIRONMENTAL SCIENCE AND BIO-TECHNOLOGY
(2022)
Article
Engineering, Chemical
Duchao Zhang, Xiaoyun Jia, Guanxing Ren, Weifeng Liu, Lin Chen, Tianzu Yang
Summary: This paper demonstrates that acid-resistant and alkali-resistant cordierite carrier can be transformed into hydroxysodalite through alkaline hydrothermal treatment, and then dissolved by subsequent acid leaching to enrich platinum group metals (PGMs). The optimal conditions for this process were determined as holding temperature of 150 degrees C, NaOH to raw material mass ratio of 10:10, holding time of 60 min, liquid to solid ratio of 3:1, and stirring speed of 400 rpm. The losses of Pt, Pd, and Rh throughout the entire process were only 2.77%, 1.89%, and 4.28%, respectively.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Engineering, Chemical
Jinsong Xia, Ahmad Ghahreman
Summary: Platinum group metals (PGMs), essential in various catalytic industries, are found abundantly in Spent Automotive Catalysts (SAC) and have higher grades than natural ores. However, the low recycling rate of SAC in many countries leads to the loss of valuable resources. This paper reviews the technologies for recycling PGMs from SAC, including metallurgical extraction and solution purification techniques, discussing the mechanisms, discoveries, challenges, and providing suggestions for future research and industrial applications. Overall, it presents a critical perspective on the current advances in PGMs recycling from SAC.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Natthapong Pongpichayakul, Kanlayawat Wangkawong, Paralee Waenkaew, Li Fang, Burapat Inceesungvorn, Jaroon Jakmunee, Surin Saipanya
Summary: In this study, Pt-decorated cerium zirconium oxide-modified multiwalled carbon nanotubes (Pt/CeZrO4/MCNT) were prepared as alternative catalysts to improve the activity of the ethanol oxidation reaction (EOR) in direct ethanol fuel cells (DEFCs). The prepared catalysts showed excellent electrochemical performance and stability, making them promising materials for enhancing the anodic oxidation reaction in DEFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Materials Science, Multidisciplinary
Yu-ki Taninouchi, Toru H. Okabe
Summary: Spent automobile catalysts, the most important secondary resource for platinum group metals (PGMs), need to be recycled in order to ensure a steady supply of PGMs and protect the environment. However, current recycling processes face challenges in efficient PGM recovery due to the small proportion of PGMs in the catalyst and their difficulty in dissolving in solutions. Various technologies have been developed to improve the efficiency and environmental-friendliness of PGM recycling. This article introduces industrial processes for PGM recovery from spent catalysts and discusses established and emerging trends in PGM recycling technology, including novel techniques for converting PGMs into more soluble states and physically concentrating them from spent catalysts.
MATERIALS TRANSACTIONS
(2023)
Review
Materials Science, Multidisciplinary
Yu-ki Taninouchi, Toru H. Okabe
Summary: Spent automobile catalysts are a vital resource for platinum group metals (PGMs), and their recycling is crucial for ensuring a steady supply and protecting the environment. However, current recycling processes face challenges in terms of PGM recovery efficiency. In recent years, advancements have been made in developing more efficient and environmentally-friendly PGM recycling techniques. This article discusses typical industrial processes for recovering PGMs from spent catalysts and reviews emerging technologies for converting PGMs into more soluble forms and physically concentrating them from spent catalysts.
MATERIALS TRANSACTIONS
(2022)
Review
Chemistry, Physical
M. A. Salaev, A. A. Salaeva, T. S. Kharlamova, G. V. Mamontov
Summary: Pt-CeO2-based composites have attracted significant research interest for their diverse applications in environmental catalysis, with focuses on catalyst preparation, Pt and CeO2-related factors, and active site characteristics.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Review
Chemistry, Multidisciplinary
Olga Lanaridi, Michael Schnuerch, Andreas Limbeck, Katharina Schroeder
Summary: Efficient recycling of platinum group metals is of great importance due to their wide application range and increasing demand, as well as the depletion of natural resources. Ionic liquids have gained significant attention as alternative recycling approaches in the scientific community, thanks to their tunability, low volatility, and relatively easy recyclability. This review focuses on the state-of-the-art processes for platinum group metal recovery using ionic liquid-based systems, while also discussing environmental considerations, research gaps, common misconceptions, and unresolved issues.
Article
Engineering, Chemical
Ana Paula Paiva, Francisco Vega Piedras, Pedro G. Rodrigues, Carlos A. Nogueira
Summary: To ensure the supply of raw materials for important products in strategic sectors, the recovery of critical metals from secondary sources becomes increasingly urgent. This article investigates the operations of leaching and solvent extraction in order to optimize conditions and propose new arrangements to improve them.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Lavinia Tofan, Carmen-Nicoleta Bojoaga, Carmen Paduraru
Summary: This review highlights the potential of biosorbents in recycling rare earth elements and platinum group metals, as well as the challenges faced by current technologies. The discussion is divided into laboratory experiments and recycling strategies, exploring the adsorption performance of biosorbents under different conditions and their application in real samples.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Article
Geochemistry & Geophysics
Chuan Liu, Shuchen Sun, Ganfeng Tu, Faxin Xiao
Summary: Co-treatment of hazardous solid waste is an effective method to reduce cost and increase recycle efficiency. This study developed an integrated process to recover precious metals from spent auto-catalysts and reuse red mud. The process involved the reduction of iron oxide in red mud to capture precious metals and the melting of mixed waste with additives. More than 99% of precious metals can be extracted under optimal conditions.
Article
Biochemistry & Molecular Biology
Olga Lanaridi, Sonja Platzer, Winfried Nischkauer, Andreas Limbeck, Michael Schnuerch, Katharina Bica-Schroeder
Summary: Researchers are increasingly interested in using phosphonium-based ionic liquids for the extraction and separation of platinum group metals, with promising candidates such as P66614Cl and P(66614)B2EHP showing the ability to quantitatively extract Pt, Pd, and Rh from mixed model solutions.
Article
Chemistry, Physical
Aline R. M. Cruz, Luiz H. Vieira, Elisabete M. Assaf, Janaina F. Gomes, M. Assaf
Summary: Catalyst improvement is crucial in developing efficient fuel cell technologies. The promotion of the Cu/CeO2 system with Pt in the CO-PROX reaction was investigated. The PtCu/CeO2 catalysts prepared by impregnation showed high activity, while Cu/CeO2 and Pt/CeO2 were inactive. The addition of CO2-H2O to the feed stream improved the activity of PtCu/CeO2 catalysts. By using deactivation-resistant Pt sites, CO-PROX under H2O/CO2 feed stream at low temperatures can be effectively achieved.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Zi-Gang Zhao, Pan Guo, Li-Xiao Shen, Yang-Yang Liu, Zi-Yu Zhang, Feng-Di Tu, Miao Ma, Xiao-Wei Liu, Yun-Long Zhang, Lei Zhao, Guang-Jie Shao, Zhen-Bo Wang
Summary: In this study, Pt-CeO2 composites supported by zeolitic imidazolate framework-8 (ZIF-8) derived nitrogen-doped carbon (NC) were demonstrated to have abundant triple-phase interfacial conjunction, leading to enhanced activity and durability for the oxygen reduction reaction.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Salman Karim, Yen-Peng Ting
Summary: This study demonstrates the effectiveness of sequential pretreatment and bioleaching for enhanced biorecovery of platinum group metals (PGM) from spent automotive catalyst (SAC). The optimization of pretreatment and bioleaching parameters significantly improves the recovery efficiency of PGM.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Sadia Ilyas, Hyunjung Kim, Rajiv Ranjan Srivastava, Sowon Choi
Summary: This study investigated the recovery of rare earth elements (REEs) from sulfate leach liquor of vein deposit Korean monazite using solvo-chemical techniques. The selective extraction of cerium and removal of phosphorus from the solution were successfully achieved, leading to high-purity REEs for clean energy programs. The study presents a cleaner production approach for sustainable development goals.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Sadia Ilyas, Hyunjung Kim, Rajiv Ranjan Srivastava
Summary: The study investigated the solvent extraction of cerium(IV) and precipitation kinetics, leading to a potential method for extracting cerium(IV) from sulfate leach liquor and recovering cerium(III) oxalate. The findings showed that the precipitation kinetics followed the Avrami equation, with n values indicating instantaneous nucleation and growth of the precipitates in a flakes shape. The apparent activation energy for the precipitation reaction suggested a diffusion-controlled mechanism, supported by the surface site saturation of cerium(III) oxalate through the Avrami equation constants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Ha Bich Trinh, Jaeryeong Lee, Seunghyun Kim, Jae-chun Lee, Juan Carlos Fuentes Aceituno, Seokhoon Oh
Summary: This study combined acid leaching and electrodeposition to simplify the recovery process of copper from industrial waste, achieving high efficiency and a pure copper product.
Article
Materials Science, Multidisciplinary
Sadia Ilyas, Rajiv Ranjan Srivastava, Hyunjung Kim
Summary: This study investigates the liquid-liquid extraction behavior of phosphorus from a sulfuric acid solution using BDMA in kerosene, demonstrating the formation of a 3[BDMA].[H3PO4] over bar complex in the organic phase. Thermodynamic properties show that the extraction process is exothermic, and the McCabe-Thiele diagram confirms the need for three counter-current stages in the extraction at a specific O/A volume ratio. Additionally, quantitative back-extraction of phosphorus from the loaded organic phase is achieved by contacting H2SO4 solution in three stages of counter-current contact at a specific O/A volume ratio.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2021)
Article
Engineering, Environmental
Sadia Ilyas, Rajiv R. Srivastava, Hyunjung Kim, Subhankar Das, Vinay K. Singh
Summary: This study explores the connection between circular bio-economy and e-waste recycling through microbial activities for metal extraction. A prediction model suggests that restoring copper and gold through microbial activities can significantly reduce CO2 emissions and water consumption compared to primary production activities.
Review
Materials Science, Multidisciplinary
Jae-chun Lee, Kurniawan, Eun-young Kim, Kyeong Woo Chung, Rina Kim, Ho-Seok Jeon
Summary: This article provides a comprehensive review on the metallurgical treatments of vanadium bearing slags, highlighting the importance of developing sustainable metallurgical processes. The research discusses traditional and modern methods for treating vanadium bearing slags, as well as promising technologies for future focus. Recommendations are made for separating vanadium from interfering elements in leach solutions and advancing extractive metallurgy techniques.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Environmental Sciences
Sadia Ilyas, Rajiv Ranjan Srivastava, Hyunjung Kim, Nimra Ilyas
Summary: This study focused on improving the extraction yield of valuable metals during bioleaching of waste printed circuit boards (WPCBs) by acid pretreatment and parametric optimization. The research demonstrated the auto-catalytic behavior of Cu and the transition from chemically-controlled to diffusion-controlled mechanism in bioleaching kinetics.
Article
Engineering, Chemical
Sadia Ilyas, Hyunjung Kim, Rajiv Ranjan Srivastava
Summary: The study successfully separated Pt, Pd, and Rh through liquid-liquid extraction using an undiluted phosphonium-based ionic liquid, Cyphos IL 101, with high extraction efficiency for Pt and Pd. Rh, however, showed lower extraction efficiency but could be efficiently scrubbed by contacting with HCl solution. Selective back-extraction successfully recovered Pt and Pd, demonstrating the stability and reusability of the ionic liquid.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Geochemistry & Geophysics
Rajiv Ranjan Srivastava, Dilip Kumar Rajak, Sadia Ilyas, Hyunjung Kim, Pankaj Pathak
Summary: The incessant generation and mismanagement of industrial waste, resource scarcity, and environmental degradation have led to the unsustainability of human life. Industrial waste, regardless of its hazardous nature, is often open dumped, resulting in adverse environmental and health impacts. However, this waste can be recycled and help alleviate resource scarcity.
Article
Geosciences, Multidisciplinary
Basudev Swain, Jae-Chun Lee
Summary: This paper discusses the separation of platinum and palladium from chloride solutions using liquid-liquid extraction with Alamine 308 as the extractant. The study evaluates the effects of different process parameters on the separation behavior, such as the concentrations of HCl, NaCl, platinum, and palladium in the aqueous solution, and the concentration of Alamine 308 in the organic phase. Selective stripping of platinum and palladium was achieved using NaSCN and (NH2)(2)CS respectively. The process ensures the separation and recovery of platinum and palladium with 99.99% purity from a mixed solution.
GEOSYSTEM ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Sadia Ilyas, Rajiv Ranjan Srivastava, Suhyeon Jin, Hyunjung Kim
Summary: In this study, the complete separation of copper over nickel from an ammoniacal leach liquor of nickel laterite ore was achieved using a combination of phenolic oxime (LIX 84-IC) and tributyl phosphate (TBP). The antagonistic effect of TBP was confirmed by the distribution coefficients and negative increment D values. The highest separation was obtained at a molar ratio of LIX 84-IC:TBP = 0.4:0.6 and an organic-to-aqueous phase ratio of 1, with a separation factor (beta(Cu/Ni)) of >1329.
GEOSYSTEM ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Sadia Ilyas, Rajiv Ranjan Srivastava, Hyunjung Kim
Summary: The present study investigates the resource circulation of precious metals (Pt and Pd) from exhausted catalytic-converters using a green integrative approach of bio-solvo-chemical techniques. More than 95% of Pt and Pd were efficiently dissolved in bio-cyanide solution and extracted using a green ionic-liquid solvent. The process achieves zero-discharge of toxic substances and significantly reduces CO2 emissions, making it suitable for sustainable development.
Review
Environmental Sciences
Basudev Swain, Ata Akcil, Jae-chun Lee
Summary: Significantly unexploited red mud contains valuable rare earth metals and other metals that can be recovered through an industrial-scale valorization process. The global red mud inventory could reach 4 billion tons by 2020, with a potential value of approximately $4.3 trillion in rare earth metals. This article discusses the challenges and opportunities of valorizing red mud and proposes a feasible sequential metal recovery process.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Proceedings Paper
Metallurgy & Metallurgical Engineering
Sadia Ilyas, Hyunjung Kim, Rajiv Ranjan Srivastava
Summary: This study investigated the recovery of cerium from a secondary waste stream generated after extracting Pt-group metals from spent catalytic converters. By using acid mixtures for leaching and extraction processes, high efficiency in recovering cerium was achieved, providing a new pathway for recycling critical metal values from waste materials.
TMS 2021 150TH ANNUAL MEETING & EXHIBITION SUPPLEMENTAL PROCEEDINGS
(2021)
Proceedings Paper
Metallurgy & Metallurgical Engineering
Sadia Ilyas, Hyunjung Kim, Rajiv Ranjan Srivastava
Summary: The carbothermic reduction-roasting process of low-grade Ni-lateritic under the modified Caron process was investigated. Optimal conditions were found to efficiently reduce laterite to metallic nickel and cobalt, with the use of additives showing a positive effect on the reduction process. Leaching kinetics of the roast-reduced laterite were found to follow a shrinking core model with a mixed- and diffusion-controlled mechanism for nickel and cobalt, respectively.
5TH INTERNATIONAL SYMPOSIUM ON NICKEL AND COBALT (NI-CO 2021)
(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)