Article
Environmental Sciences
Sikandar Azam, Vasily Kurashov, John H. Golbeck, Sekhar Bhattacharyya, Siyang Zheng, Shimin Liu
Summary: Coal dust is a major hazardous pollutant in coal mining environment and contains environmentally persistent free radicals (EPFRs). This study used EPR spectroscopy to analyze EPFRs characteristics in different types of nano-size coal dust and compared their stability and EPR parameters. EPFRs in coal were found to be stable and mostly comprised of oxygenated carbon centered or carbon and oxygen centered free radicals. EPFRs concentration in coal dust was proportional to carbon content and inversely related to g-values. The characteristics of EPFRs in coal dust were similar to those found in other environmental pollutants. It is recommended to study the role of EPFR-loaded coal dust in inhalation toxicity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biotechnology & Applied Microbiology
Edita Baltrenaite-Gediene, Slawomir Lomnicki, Chuqi Guo
Summary: Environmentally persistent free radicals (EPFRs) have detrimental effects on human health by inducing oxidative stress and promoting the formation of reactive oxygen species (ROS) in soil. These radicals can influence the transformation of contaminants and impact soil quality and human health.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Engineering, Environmental
Sijia Liu, Weilin Huang, Jingjing Yang, Yu Xiong, Ziqing Huang, Jinling Wang, Tingting Cai, Zhi Dang, Chen Yang
Summary: Microplastics (MPs), resulting from the breakdown of plastic wastes, are widely distributed in the environment. Under ultraviolet (UV) radiation, the further fragmentation of MPs may lead to the formation of environmentally persistent free radicals (EPFRs). This study investigated the correlation between EPFRs concentrations and UV energy, using different types of plastics and UV light sources. The results showed that the structure of MPs and the level of UV energy influenced the generation of EPFRs. It was also observed that UVC radiation led to faster formation of free radicals compared to UVB and UVA. The study provides insights into the mechanisms of EPFRs formation on microplastic particles and highlights the broad impacts of EPFRs on the fate and transport of MPs in aquatic environments.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Review
Environmental Sciences
Chuqi Guo, Jennifer Richmond-Bryant
Summary: Long-lived EPFR exposures can lead to respiratory and cardiovascular effects, attributed to their ability to produce reactive oxygen species. Characterizing EPFR exposure and health impacts requires systematic analysis protocols. Solvent extraction methods for EPFR analysis show varying recovery results based on radical species and solvent structure.
Article
Environmental Sciences
Linjun Qin, Lili Yang, Xiaoyun Liu, Cui Li, Bingcheng Lin, Minghui Zheng, Guorui Liu
Summary: This study unveiled the mechanism of EPFR formation from catechol during heating and the influence of metal oxides on this process, providing crucial information for better control of EPFR formation from anthropogenic activities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Yang Xu, Linjun Qin, Guorui Liu, Minghui Zheng, Da Li, Lili Yang
Summary: The study assessed daily exposure levels of EPFRs for urban residents in Beijing, finding that carbon-centered radicals dominated in winter, while oxygen-centered radicals dominated in summer. Coal combustion in winter was identified as a key influencing factor, and an intuitive assessment concluded that one urban resident may inhale the equivalent of 46 cigarettes per day in EPFRs. Further research on the health risks of these free radicals, especially during winter, is recommended.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Yuhan Zhu, Jia Wei, Jun Li
Summary: This research successfully oxidized As(III) to As(V) by using a biochar/persulfate system, reducing its toxicity. The study found a good linear relationship between environmental persistent free radicals and As(III) oxidation, suggesting their role in promoting the process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Yong Teng, Qixing Zhou
Summary: The study revealed varying effects of B(a)P on soil-wheat systems depending on soil types and concentrations, with B(a)P inhibiting root and shoot length in different soil types and showing a concentration-dependent increase. Observations also included higher bioconcentration factors and translocation factors in red soil-wheat systems with lower B(a)P concentrations, while inhibitive effects mainly targeted wheat shoots in the studied soils.
LAND DEGRADATION & DEVELOPMENT
(2021)
Article
Environmental Sciences
Ruirui Zhang, Andrew R. Zimmerman, Ruiling Zhang, Penghui Li, Yue Zheng, Bin Gao
Summary: Biochar is a promising soil conditioner and environmental remediation material, but the relationship between persistent free radicals (PFRs) and biochar, as well as their effects on plant growth and oxidative stress, need to be further investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Agricultural Engineering
Yanzhuo Zhang, Mengqi Xu, Xiaoke Liu, Meng Wang, Jing Zhao, Shaoya Li, Muchen Yin
Summary: This study identified an environmentally friendly remediation approach using biochar to degrade quinolone antibiotics by activating oxidants. By adjusting the parameters of biochar preparation, the efficiency of environmentally persistent free radical generation can be enhanced. The results indicate that biochar activation of persulfate is a promising technique for antibiotic degradation.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Qianqian Li, Lingwen Dai, Mengjing Wang, Guijin Su, Tieyu Wang, Xu Zhao, Xihui Liu, Yulin Xu, Jing Meng, Bin Shi
Summary: Environmentally persistent free radicals (EPFRs) are emerging pollutants in contaminated soils, with Chinese coke production identified as a significant source. A study on a typical coking plant in Tangshan, China revealed higher concentrations of EPFRs in the reconstructed project (RP) region compared to the elimination engineering (EE) region, with polycyclic aromatic hydrocarbons (PAH) identified as the main source in EE region. Copper (Cu) and iron oxide (Fe2O3) were found to be positive influence factors in EPFRs formation, while total organic carbon (TOC) had a negative impact. Visible light irradiation was shown to induce the transformation and generation of EPFRs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Shuting Liu, Guorui Liu, Lili Yang, Da Li, Minghui Zheng
Summary: This article summarizes the role of different metal compounds in the formation and stabilization of environmentally persistent free radicals (EPFRs). It emphasizes the importance of understanding EPFR characteristics and developing control strategies.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Ankit Aryal, Alexandra Noel, Lavrent Khachatryan, Stephania A. Cormier, Pratiti H. Chowdhury, Arthur Penn, Tammy R. Dugas, Ashlyn C. Harmon
Summary: This study evaluates the cardiopulmonary effects of particulate matter containing environmentally persistent free radicals (EPFRs) and finds that these particles can cause both lung function decline and vascular dysfunction. Gene expression analysis reveals that lung AT2 cells are the primary target for EPFR activation, highlighting the importance of additional studies on the cardiopulmonary effects of EPFRs.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Li Wang, Danli Liang, Jiarong Liu, Lin Du, Eric Vejerano, Xiuhui Zhang
Summary: This study investigated the influence of acidic and basic pollutants on the formation of EPFRs using DFT and AIMD calculations. The findings showed that these pollutants can enhance the formation of EPFRs through different mechanisms. Acidic pollutants transfer hydrogen atoms to form EPFRs, while basic pollutants extract hydrogen atoms to form phenoxy EPFRs.
Article
Environmental Sciences
Pengfei Cheng, Xuqiang Zhao, Hassan El-Ramady, Tamer Elsakhawy, Michael Gatheru Waigi, Wanting Ling
Summary: The study revealed that metal oxides play a dual role in photocatalysis, both promoting the photodegradation of contaminants like triclosan and inhibiting it by competing with the contaminants for irradiation. Additionally, metal oxides were found to promote the formation of environmentally persistent free radicals (EPFRs), with EPFRs yields dependent on the concentration of metal oxides. This research provides new insights into the environmental impacts of metal oxides and the formation and fate of EPFRs in soil and aquatic environments.
Article
Chemistry, Physical
Cheng Chen, Yongyi Wang, Yajing Huang, Jian Hua, Wei Qu, Dehua Xia, Chun He, Virender K. Sharma, Dong Shu
Summary: This study found that pollutants containing phenolic moiety can greatly enhance the efficiency of the Fe(III)/H2O2 system without catalyst in degrading pollutants. Kinetics analysis revealed the self-catalytic degradation of the pollutants, with the best performance observed at pH 4.0. Spectroscopic measurements and theoretical calculations revealed a previously overlooked self-catalytic mechanism involving the formation of a yellow-colored high-spin P-Fe(III)-OOH complex, which subsequently converts to Fe(II). The oxidation of phenolic moiety generates hydroquinone, which also facilitates the cycling of Fe(III)/Fe(II) and the generation of hydroxyl radicals responsible for efficient decontamination.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Haitao Ren, Yue Yuan, Abdelkader Labidi, Qibing Dong, Ke Zhang, Eric Lichtfouse, Ahmed A. Allam, Jamaan S. Ajarem, Chuanyi Wang
Summary: In the context of the circular economy, biomass waste can be converted into value-added materials and energy to reduce pollution and waste disposal costs. This study developed low-cost and environmentally friendly carbon quantum dots (CQDs) from peach leaf waste, which showed excellent fluorescence properties and stability, making them a potential candidate for biological imaging.
CHINESE CHEMICAL LETTERS
(2023)
Article
Energy & Fuels
Tian Chang, Zuotong Zhao, Karen Leus, Zhenxing Shen, Yu Huang, Chuanyi Wang, Nathalie De Geyter, Rino Morent
Summary: In this study, the degradation of trichloroethylene (TCE) was achieved by using a hybrid system combining a corona discharge reactor and a series of Ag-Mn-Ce/HZSM-5 catalysts. The combination of plasma and catalysis significantly promoted TCE oxidation compared with the plasma alone system. The addition of silver activated the surface adsorbed oxygen, promoting the reducibility of the catalyst and enhancing the oxidation of TCE. Furthermore, relative humidity had an important effect on TCE oxidation.
Article
Chemistry, Physical
Fan Pan, Jianjun Zhou, Tian Wang, Yunqing Zhu, Hongrui Ma, Junfeng Niu, Chuanyi Wang
Summary: This study develops an efficient catalyst for the electrochemical nitrate reduction reaction, achieving high nitrate conversion, ammonia selectivity, and reaction rate. The structure-performance relationship of the catalyst is revealed, and the reaction mechanism of nitrate-to-ammonia transformation is explored.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Virender K. Sharma, Junyue Wang, Mingbao Feng, Ching-Hua Huang
Summary: The occurrence of micropollutants in water poses a threat to public health and the environment. The addition of certain amino acids can enhance the removal efficiency of these micropollutants by ferrate(VI).
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Geochemistry & Geophysics
Mengning Xi, Chi Zhang, Zhiyu Zhou, Kecheng Zhu, Hanzhong Jia
Summary: The reactions of elements at the minerals-water interface play a critical role in determining their fate in aquatic environments. In this study, molecular dynamics simulations were used to investigate the microscopic structural characteristics and thermodynamic properties of Se(IV) complexation on different surfaces of gibbsite. Our findings provide insights into the complexation reaction mechanism of Se(IV) on different crystal facets and pH conditions, which is important for understanding the environmental behavior of inorganic contaminants.
Review
Engineering, Chemical
Poulami Mukherjee, Krishnamoorthy Sathiyan, Tomer Zidki, Mallikarjuna N. Nadagouda, Virender K. Sharma
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Wei Wang, Yu Huang, Yongfang Rao, Rong Li, Shuncheng Lee, Chuanyi Wang, Junji Cao
Summary: Cationic defects in CoMnOx can enhance the lattice oxygen activation and toluene oxidation, leading to improved catalytic performance.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Chemistry, Physical
Jianmin Luo, Wenqin Li, Xinglei Wang, Bin Liu, Yi Zhang, Meiqing Jiang, Lejie Zhu, Huishi Guo, Chuanyi Wang
Summary: A modified graphitic carbon nitride material was synthesized and doped with ytterbium and induced nitrogen vacancies to enhance its photocatalytic decomposition efficiency of tetracycline. The results suggest that ytterbium doping can expand the light responsive range and inhibit the recombination of photogenerated carriers, thereby improving the photocatalytic performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Analytical
Untika Pengsomjit, Waleed Alahmad, Pakorn Varanusupakul, Sibel A. Ozkan, Virender K. Sharma, Charoenkwan Kraiya
Summary: This paper presents a greener methodology for determining streptomycin in honey using gel electromembrane extraction (G-EME) technique with exfoliated graphene (EG). The addition of EG enhances the extraction efficiency and sensitivity. The problem of increased electric current and electroendosmosis due to graphene-based nanomaterials is solved by tuning the acceptor phase's volume.
Article
Chemistry, Physical
Yajie Du, Yuhan Lin, Xingliang Bao, Fengjuan Zha, Yingxuan Li, Chuanyi Wang
Summary: The photocatalytic CO2 reduction performance of 2 H-MoS2 was significantly improved by constructing a Bi/2 H-MoS2_x composite and employing a photo-thermal synergy strategy. The introduction of Bi enhanced light absorption, created electron capture centers, and promoted the generation of key intermediates. The photo-thermal synergistic effect accelerated charge migration and surface reaction rate.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2024)
Article
Chemistry, Physical
Sial Atif, Dar Ahmed Afzal, Labidi Abdelkader, Ximing Li, Qibing Dong, Chuanyi Wang
Summary: This study successfully synthesized a visible light active heterocomposite BNT@Mn-SnO2 (BSM) for the piezo-photocatalytic degradation of Tetracycline (TC). The BSM material exhibited high efficiency in degrading TC and reducing its toxicity to non-toxic compounds.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Physical
Ximing Li, Qibing Dong, Fei Li, Qiuhui Zhu, Qingyun Tian, Lin Tian, Yiyin Zhu, Bao Pan, Mohsen Padervand, Chuanyi Wang
Summary: This research presents a novel approach for precisely constructing atomic-level interface electron transfer channels using carbon-bismuth bonding. The optimized material exhibited significantly improved photocatalytic performance for the removal of atmospheric NO. The introduction of graphitic carbon as a bridge enhanced the electron transfer efficiency.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Article
Chemistry, Physical
Peng Zhang, Xingying Meng, Mingyi Fan, Sai Wu, Cuiping Wang, Xiaofu Shang, Hanzhong Jia, Hongwen Sun
Summary: In this study, a novel nitrogen-doped reduced graphene oxide aerogel catalyst with supported nanoscale zero-valent iron was successfully synthesized and used for the removal of imidacloprid from wastewater using microwave-assisted treatment. The unique structure and synergistic effects of the catalyst resulted in rapid and efficient degradation of the imidacloprid, providing a new paradigm for designing microwave-assisted catalysts for wastewater treatment.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2024)
Article
Engineering, Environmental
Haitao Ren, Fan Qi, Abdelkader Labidi, Ahmed A. Allam, Jamaan S. Ajarem, Detlef W. Bahnemann, Chuanyi Wang
Summary: In this study, carbon quantum dots (CQDs) with excellent fluorescence properties were prepared from apple leaf waste and used as a fluorescent probe for the detection of Fe3+ in aqueous environments. The CQDs exhibited high fluorescence stability, specific recognition ability for Fe3+, and recyclability.
ACS ES&T ENGINEERING
(2023)
