Article
Agricultural Engineering
Wenli Yao, Fenghui Qin, Ziwei Zhao, Zhijun Ma, Chunyang Hu, Lei Zhou, Yian Zheng
Summary: Perfluorinated compounds have serious impacts on ecosystems and human health. This study explored the use of Calotropis gigantea fiber as a template to create a composite catalyst for the removal of perfluorooctanoic acid (PFOA) from water. The results showed that the catalyst achieved a degradation efficiency of 72.2% for PFOA within 4 hours under optimized conditions. The system displayed resistance to external ions and different media, and the catalyst maintained high stability and reusability after multiple cycles.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Engineering, Chemical
Bihui Niu, Min Yu, Changduo Sun, Luhan Wang, Kun Zang, Xiaowen Hu, Lei Zhou, Yian Zheng
Summary: The open hollow structured Calotropis gigantea fiber (CGF) converted to magnetic carbonized fiber (MC-CGF) was successfully utilized as an efficient catalyst for the decomposition of perfluorooctanoic acid (PFOA). The presence of MC-CGF reduced the activation energy and increased the removal efficiency of PFOA. Mechanism research suggested that PFOA undergoes initial decarboxylation, with two possible decomposition pathways. Further evaluation demonstrated that the PFOA decomposition process using MC-CGF and persulfate system was relatively harmless and environmentally friendly, as indicated by changes in chlorophyll content in pakchoi plants.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Masud Hassan, Jianhua Du, Yanju Liu, Ravi Naidu, Jin Zhang, Md Ariful Ahsan, Fangjie Qi
Summary: In this study, magnetic biochar was synthesized as an adsorbent for the removal of PFOS from water and soils. The magnetic biochar exhibited magnetic and hydrophilic functional groups, which served as active sites for PFOS adsorption. The maximum adsorption capacity of the magnetic biochar for PFOS was found to be 120.44 mg/g.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Environmental Sciences
Shuting Tian, Tianyuan Xu, Leqi Fang, Yangmo Zhu, Fan Li, Rodney Nelson Leary, Man Zhang, Dongye Zhao, Te-Yang Soong, Hang Shi
Summary: The study tested a two-step 'Concentrate-&-Destroy' technology for removing and degrading PFAS in landfill leachate using a specific adsorptive photocatalyst. The technology effectively removed various PFAS and achieved regeneration and degradation under UV.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Yun Chen, Anett Georgi, Wenying Zhang, Frank-Dieter Kopinke, Jingchun Yan, Navid Saeidi, Jing Li, Mingyue Gu, Mengfang Chen
Summary: CuMgFe-LDH was prepared as an adsorbent for fast adsorption of PFOS and PFOA, primarily driven by hydrophobic interactions. While PFOA adsorption was suppressed under alkaline conditions, PFOS uptake was only slightly affected, indicating the significant role of electrostatic interactions for PFOA adsorption. The adsorption of PFOS and PFOA was insensitive to competition by monovalent anions, and spent CuMgFe-LDH could be easily regenerated for subsequent usage cycles.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Yi-Lin He, Hong-Ying Yang, Pei-Zhi Huang, Wei-Jiao Feng, Kun Gao
Summary: Sixteen cardiac glycosides, including five previously undescribed compounds, were extracted and purified from Calotropis gigantea (L.). These compounds showed potent cytotoxic activities against various human cancer cell lines, with uscharidin and calotropin exhibiting pronounced cytotoxicity at low nanomolar concentrations against A172 and U251 cells, possibly inducing G2/M cell cycle arrest for cell death.
Article
Engineering, Chemical
Mingchuan Yu, Yufei Zhou, Kun Zhao, Yu Sun, Junfeng Niu
Summary: A novel K single-atom-strengthened biochar (K1-BC) is effective in removing PFCs from drinking water, and the introduction of K single-atom enhances the adsorption capacity. The proposed N-EDS adsorption theory is of vital significance in guiding the synthesis of single-atom-strengthened biochar and the removal of PFOA/PFOS from drinking water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Prashan M. Rodrigo, Chanaka Navarathna, Michael T. H. Pham, Sarah J. McClain, Sean Stokes, Xuefeng Zhang, Felio Perez, Sameera R. Gunatilake, Akila G. Karunanayake, Renel Anderson, Rooban V. K. G. Thirumalai, Dinesh Mohan, Charles U. Pittman, Todd E. Mlsna
Summary: The study investigates the adsorption of PFAS compounds on commercial Douglas fir biochar and its magnetic Fe3O4-containing analogue. The results show that both BC and Fe3O4/BC have a high adsorption capacity for PFOS and PFOA, and the adsorption process is driven by hydrophobic and electrostatic interactions. The adsorbents can effectively reduce the PFAS concentrations in water to below the detection limits, approaching the EPA advisory limits. Methanol can be used for successful regeneration of the adsorbents.
Article
Environmental Sciences
Jie Yuan, Soroosh Mortazavian, Elodie Passeport, Ron Hofmann
Summary: This study evaluated the removal of perfluorooctanic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) using granular activated carbon (GAC) harvested from filter-adsorbers in drinking water treatment plants. The results showed that GAC can achieve significant removal of PFOA and PFOS through adsorption. Factors such as GAC service time and empty bed contact time (EBCT) were found to affect the removal efficiency. An empirical model was proposed to predict the removal of PFOA and PFOS based on GAC service time and EBCT.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Physical
S. Sd Elanchezhiyan, Subbaiah Muthu Prabhu, Perumal Karthikeyan, Chang Min Park
Summary: The study successfully developed a multifunctional magnetic adsorbent with the potential for removing emerging contaminants such as perfluorinated chemicals and heavy metals. The synergistic effect of cerium-incorporated ferrite decorated polyaniline hybrid composites showed enhanced adsorption capacities for these pollutants.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Environmental
Zhengyang Wang, Ali Alinezhad, Sara Nason, Feng Xiao, Joseph J. Pignatello
Summary: Several countries, including the United States, are planning to establish enforceable maximum contaminant levels for PFAS in drinking water. This study investigated the sorption of PFAS by pyrogenic carbonaceous sorbents (PCS) and found that tailoring the surface chemistry and pore structure of PCS significantly enhanced PFAS removal. Thermal oxidation of PCS increased its specific surface area and nanoporosity, leading to a three-order-of-magnitude increase in the sorption of PFAS after treatment. An ion-pair sorption mechanism and the role of pore reaming were proposed. Additionally, coating PCS with a quaternary ammonium cationic polymer further enhanced PFAS sorption by an anion-exchange mechanism. The results of this study are important for developing carbon materials with improved PFAS removal capabilities to meet regulatory requirements.
Article
Engineering, Environmental
Maura Mancinelli, Claudia Stevanin, Matteo Ardit, Tatiana Chenet, Luisa Pasti, Annalisa Martucci
Summary: The adsorption efficiency of Y-type zeolites with different silica/alumina ratios towards perfluorooctanoic acid and perfluorooctane sulfonate was studied. The results showed that these materials can be successfully used for the decontamination of water from perfluoroalkyl chemicals. Additionally, the introduction of silver onto the zeolites improved the performances in removing PFAS from water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Maura Mancinelli, Claudia Stevanin, Matteo Ardit, Tatiana Chenet, Luisa Pasti, Annalisa Martucci
Summary: The adsorption efficiency of Zeolites Y with different silica/alumina ratios towards PFOA and PFOS was investigated, with the Ag-exchanged sample showing higher saturation capacity. XRPD analyses provided insights into the exact location of PFOA and PFOS in the zeolites network and the interaction mechanism with silver.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Materials Science, Textiles
K. Sakthivel, S. Periyasamy, C. Prakash
Summary: This study discovered the properties of plant cellulose and calotropis gigantea fiber, as well as natural oils. Various experimental values were examined, including the chemical composition, Hollowness Free Space, X-ray Diffraction Analysis, FTIR, SEM, Density Gradient Column, free space availability calculation, and oil-holding capacity. The results depended on the density of the oil and fiber, showing promising potential. The calotropis gigantea fiber was found to have large free spaces for oil storage. Equations were established to support the correlation with oil-holding capacity. The web structure of the fiber demonstrated a high degree of oil absorption for various oil types. For coconut oil, the absorbed oil mass was approximately 9 g, which represents around 1800% of the actual mass of the fiber.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Materials Science, Composites
Saipad B. B. P. J. Sahu, Subhakanta Nayak, Sibakanta Sahu, Manmatha K. Roul
Summary: This research focuses on developing a new material by reinforcing chemically treated Calotropis gigantea bast fibers with epoxy resin as matrix. The optimum properties were found at 20 wt% of fiber loading, making the composites suitable for manufacturing lightweight automotive parts for improved fuel efficiency.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Textiles
Bihui Niu, Min Yu, Changduo Sun, Luhan Wang, Yanning Niu, Huimin Huang, Yian Zheng
Summary: In this study, three functionalized fiber adsorbents were fabricated using Calotropis gigantea fiber as the bio-template. These adsorbents showed high adsorption capacity for perfluorooctanoic acid (PFOA) removal from water. The adsorption process reached equilibrium within 3 hours, and the maximum adsorption capacity was 207.3-232.8 mg/g. Electrostatic attraction, hydrogen bond, and hydrophobic interaction were involved in the adsorption process. The adsorbents could be well regenerated and maintained high adsorption percentage (>= 80%) after multiple adsorption-desorption cycles. Among the three adsorbents, PAN-CGF exhibited outstanding adsorption performance for perfluorochemicals removal.
JOURNAL OF NATURAL FIBERS
(2022)
Article
Biochemical Research Methods
Yuting Li, Luhan Wang, Minhua Qian, Shengda Qi, Lei Zhou, Qiaosheng Pu
Summary: A simple and efficient CE-C4D method was developed for the analysis of GHB. The method showed good precision and a linear relationship between the C4D signal of GHB and its concentration. It was successfully applied for the determination of exogenous GHB in spiked beverages and endogenous GHB in human urine.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Engineering, Environmental
Bihui Niu, Luhan Wang, Mingzhe Li, Wenli Yao, Kun Zang, Lei Zhou, Xiaowen Hu, Yian Zheng
Summary: The study explored the use of B-doped perovskite-like material CeCu0.5Co0.5O3 for activating peroxymonosulfate in degrading emerging pollutant norfloxacin. Results showed that 5.0% B-doped material exhibited high degradation efficiency and stable catalytic ability under various conditions, indicating its potential as an excellent catalyst for advanced oxidation technology in wastewater treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Wenli Yao, Mingzhe Li, Changduo Sun, Yanlong Liu, Mengling Ma, Fengjuan Chen, Lei Zhou, Yian Zheng
Summary: In this study, a Co/TM/g-C3N4 catalyst was developed and used to activate peroxymonosulfate (PMS) for the removal of emerging perfluorooctanoic acid (PFOA) under visible light irradiation. The results showed that the developed synergistic system had the ability to effectively remove PFOA and could be applied in actual water bodies.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Chemical
Mingzhe Li, Wenli Yao, Min Yu, Changduo Sun, Xinquan Deng, Fengjuan Chen, Lei Zhou, Yian Zheng
Summary: In this study, a chitosan grafted polyacrylic acid hydrogel was prepared and used to fabricate magnetic functional materials. The degradation behaviors and mechanism of ciprofloxacin were systematically investigated using this new material as a catalyst and peroxymonosulfate as an activator. The results showed that the prepared hydrogel had stable catalytic ability and high degradation efficiency under different conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Biochemical Research Methods
Jingtong Xia, Minhua Qian, Jiahao Zhou, Zhaoyan Wang, Hongli Li, Lei Zhou, Qiaosheng Pu
Summary: Salvianolic acids were found to form a ternary complex with borax and 2-hydroxypropyl-beta-cyclodextrin, enhancing their fluorescence intensity for sensitive analysis. This method was successfully applied to quantitative analysis of salvianolic acids in traditional ginsengs, as well as monitoring the consumption of salvianolic acid B in cell culture medium.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Biochemical Research Methods
Jiali Qian, Hongli Li, Yuanhang Wang, Yixuan Li, Jie Yu, Lei Zhou, Qiaosheng Pu
Summary: Plastic microchips are advantageous in terms of easy fabrication and low cost, but their surface properties often require modification for electrophoretic separation. Additionally, the short length and relatively larger inner diameters of microchannels on typical microchips may affect the separation process. In this study, a zwitterionic surfactant, HDAPS, was used as a multifunctional additive to improve surface properties and enhance separation performance without the need for viscous polymeric additives. Experimental results showed effective inhibition of analyte adsorption and stable negative surface charge with HDAPS. Rapid separation of rhodamines was achieved within 90 seconds using the proposed system, with high theoretical plate numbers and low deviations in retention time and peak area. The system was verified by detecting rhodamines in eyeshadow and wolfberry. (c) 2022 Elsevier B.V. All rights reserved.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Engineering, Environmental
Yanlong Liu, Wenli Yao, Fenghui Qin, Lei Zhou, Yian Zheng
Summary: This study developed and compared four machine learning-based classifiers and used two large-scale blended plastic datasets to identify and classify microplastics (MPs). The 1D CNN model achieved the highest overall accuracy of 96.43% on a small dataset and outperformed other models. It was found that the RF model was the most robust with less spectral data, while the 2D CNN and RF models could be evaluated for plastic identification with fewer spectral data. An open-source MP spectroscopic analysis tool was developed for quick and accurate analysis of existing MP samples.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Chengxin Wu, Xing Wei, Xue Men, Yulong Xu, Junjie Bai, Yu Wang, Lei Zhou, Yong-Liang Yu, Zhang-Run Xu, Ming-Li Chen, Jian-Hua Wang
Summary: We constructed an open and low-cost flow cytometer that integrates single cell aligning and fluorescence detection functions. The hardware cost for the LIF detection unit and 3D focusing device is $3200 and $400 respectively. The flow cytometer showed favorable assay precision and accuracy, and was successfully applied for evaluating ROS generation in single HepG2 cells.
Article
Biochemical Research Methods
Jingtong Xia, Jiahao Zhou, Yanlong Liu, Na Yan, Xiaowen Hu, Lei Zhou, Qiaosheng Pu
Summary: This study focuses on the analysis of flavonoids, a class of natural polyphenolic compounds. Apigenin, kaempferol, and formononetin were used as representative compounds, and their weak fluorescence was significantly enhanced using tetraborate complexation. A capillary electrophoresis method with laser-induced fluorescence detection was developed for the analysis of flavonoids. This method was successfully applied for the analysis of flavonoids in alfalfa plants and for distinguishing between different forage grass seeds based on their substance metabolism.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Agricultural Engineering
Wenli Yao, Fenghui Qin, Ziwei Zhao, Zhijun Ma, Chunyang Hu, Lei Zhou, Yian Zheng
Summary: Perfluorinated compounds have serious impacts on ecosystems and human health. This study explored the use of Calotropis gigantea fiber as a template to create a composite catalyst for the removal of perfluorooctanoic acid (PFOA) from water. The results showed that the catalyst achieved a degradation efficiency of 72.2% for PFOA within 4 hours under optimized conditions. The system displayed resistance to external ions and different media, and the catalyst maintained high stability and reusability after multiple cycles.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
