Article
Spectroscopy
Lanlan Li, Chenxi Jiang, Jing Xiao, Hong Luo, Shu Zhang, Zhirong Zou, Ke Huang
Summary: Selenium, mercury and arsenic are widely distributed in the environment, and their toxicity depends on their concentration and forms. Accurate monitoring of these elements is necessary. Photochemical vapor generation (PVG) is a promising method for analytical atomic spectrometry, and it has been applied to determine selenium, mercury and arsenic with various separation techniques. This review summarizes the applications of PVG-analytical atomic spectrometry in selenium, mercury and arsenic speciation analysis.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Environmental Sciences
Guangyuan Xu, Zucheng Wang, Hongyan Zhao, Zhaojun Bu, Matthew Peros, Shasha Liu, Hongkai Li, Shengzhong Wang
Summary: The study found that surface water in the mires of the Changbai Mountains in northeastern China had elevated levels of mercury and antimony, while arsenic, selenium, and bismuth were within permissible limits. The concentrations of antimony were influenced by the acidity of the mire water and were positively linked with arsenic. The inputs of mercury and antimony into the surface water were primarily derived from atmospheric wet deposition and subsequent surface runoff.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Chemistry, Analytical
Ying Liu, Chun Yang, Peng-Ju Xing, Xing Liu, Jin-Zhao Liu, Zhen-Li Zhu
Summary: A new method based on hydrogen-doped solution anode glow discharge optical emission spectrometry (SAGD-OES) was developed for the direct detection of trace As in water samples. The method eliminates the use of a hydride generation (HG) sampling unit and only consumes low power, providing a promising approach for sensitive and rapid field As analysis. The proposed method was validated by the analysis of a certified reference material [GSB 07-3171-2014] and real water samples.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Energy & Fuels
Jin Xie, Xiao-Dong Niu, Kai-Qiang He, Meng-Dan Shi, Su-Juan Yu, Chun-Gang Yuan, Jing-Fu Liu
Summary: This study investigated the distribution and speciation of arsenic and selenium in coal and burning byproducts in five coal-fired power plants in China. It was found that the concentrations of As and Se in fly ash and gypsum were significantly higher than in coal, indicating the need for proper disposal of coal-fired solid wastes.
Article
Limnology
Katherine R. Heal, Ashley E. Maloney, Anitra E. Ingalls, Randelle M. Bundy
Summary: Arsenic is found at nanomolar levels in the ocean and is assimilated by microbes due to its similarity to phosphorus. Particulate arsenic in the open ocean is mainly composed of arsenolipids, with arsenosugar phospholipids dominating the pool and a presence of unidentified ether lipids, indicating a bacterial source.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2022)
Article
Geochemistry & Geophysics
Rosa Cidu, Riccardo Biddau, Franco Frau, Richard B. Wanty, Stefano Naitza
Summary: Tungsten (W) is rarely found in natural waters, but can potentially enter the human body through plants, vegetables, and drinking water, potentially causing toxic effects. This study investigated the regional distribution of W in aquatic systems in Sardinia, Italy, and factors affecting its mobility. High concentrations of W were mainly found in mine waters and thermal waters, possibly related to specific chemical conditions.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Biochemistry & Molecular Biology
Katarzyna Karas, Anetta Ziola-Frankowska, Marcin Frankowski
Summary: This paper presents a new method for simultaneous speciation analysis of arsenic and selenium forms using HPLC-ICP-MS technique, with successful separation achieved on ion exchange columns, applicable to seafood and onion samples.
Article
Metallurgy & Metallurgical Engineering
Ke Wang, Qin-meng Wang, Yuan-lin Chen, Zhong-chen LI, Xue-yi Guo
Summary: Substance flow analysis was used to study an antimony pyrometallurgical system. Antimony and arsenic were taken as the objective elements, and mass balance and substance flow charts were established based on the production system. Evaluating indicators such as direct recovery rate, waste recovery rate, and resource efficiency were set up. The results showed that the resource efficiency of antimony was 89.21%, and the recovery rates of antimony in volatilization smelting, reduction smelting, and refining were 78.79%, 91.00%, and 96.06% respectively. Moreover, 11.94 kg of arsenic is carried into the smelting system for every 1 ton of antimony produced, indicating its presence as a major impurity element. Recommendations for improving the resource efficiency of antimony and cleaner production were proposed based on the substance flow analysis.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2023)
Article
Chemistry, Analytical
Yaru Zhang, Xuefei Mao, Di Tian, Jixin Liu, Chunsheng Li
Summary: A novel method using low-cost miniaturized hydride generation optical emission spectrometry equipment coupled with an in situ dielectric barrier discharge trap was developed for the determination of As in edible seaweed samples. The method significantly improved the linear range and sensitivity, with a detection limit of 0.2 μg L-1. Application of the method to seaweed samples yielded a method detection limit of 0.25 mg kg(-1) with good accuracy and precision.
ANALYTICAL METHODS
(2021)
Review
Food Science & Technology
Krystyna Pyrzynska, Aleksandra Sentkowska
Summary: Interest in selenium has been growing in recent decades due to its importance to overall health, particularly the ability of plants to convert inorganic selenium into bioactive organic compounds. Recent studies have focused on characterizing selenium species in plant foods and the effects of selenium treatment on plant chemical composition and antioxidant properties.
CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION
(2021)
Article
Engineering, Environmental
F. Paez-Osuna, M. E. Berges-Tiznado, M. G. Fregoso-Lopez, G. Valencia-Castaneda, J. A. Leon-Canedo, S. G. Alarcon-Silvas, J. F. Fierro-Sanudo, J. Ramirez-Rochin
Summary: This study examined the concentrations of six metal(loid)s in Oreochromis aureus fish collected from El Comedero dam during a massive mortality event caused by a mine tailing spill. The accumulation of metal(loid)s in the fish tissues showed higher levels in the liver than in the guts and muscle. The high concentrations of these elements in the liver suggest that the fish were exposed to elevated levels of these elements.
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2023)
Article
Engineering, Environmental
Jianrong Xue, Dongping Long, Hong Zhong, Shuai Wang, Lihua Liu
Summary: The novel technology proposed in this study can effectively recover arsenic and antimony from arsenic-rich copper smelter dust, with recovery rates of over 97.5% for both elements through leaching and reduction steps.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Inga Sowik, Joanna Zajda, Lena Ruzik
Summary: The market for vegetarian and vegan products has been rapidly growing in recent years, driven by consumers who are choosing to limit their meat intake. Among vegan products, plant-based drinks, burgers, yoghurts, and cheese are the most popular choices.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Rong Rong, Zhaoqing Cai, Xiaoyan Li, Zheng Wang
Summary: A highly sensitive method for determining mercury was developed based on DC atmospheric pressure glow discharge and cold vapor generation, with the accuracy and practicality verified through experiments.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2022)
Article
Nutrition & Dietetics
Jacob Egwunye, Barbara R. Cardoso, Sabine Braat, Tran Ha, Sarah Hanieh, Dominic Hare, Alex Xiaofei Duan, Augustine Doronila, Thach Tran, Tran Tuan, Jane Fisher, Beverley-Ann Biggs
Summary: This study investigated the association between child toxicant exposure and growth and development, finding that arsenic, lead, and mercury concentrations in children's nails were associated with lower child development scores. However, the negative association between mercury and neurological development was attenuated with increasing selenium concentration. Therefore, selenium status should be considered when assessing the impact of heavy metal toxicants on neurodevelopmental outcomes in children.
BRITISH JOURNAL OF NUTRITION
(2023)
Article
Engineering, Environmental
Xueshan Sun, Xuezhen Wang, Yingli Wan, Yafei Guo, Tianlong Deng, Xiaoping Yu
Summary: This article introduces a functional ionic liquid with high electroconductivity and extraction rate, which can effectively separate Li+ and Mg2+ from high Mg/Li ratio brine. The extraction system can efficiently extract Mg2+ and Ca2+ and can be used for extracting metallic Mg from lithium-rich brine, avoiding the dehydration and high temperature melting steps in the traditional electrolysis process. This technology is simple and low energy consumption, providing a new strategy for the effective exploitation of Li and Mg resources in salt lake brine.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Junyan Zhang, Wenjing Su, Bin Yi, Yafei Guo, Tianlong Deng, Xiaoping Yu
Summary: A new strategy for the preparation of highly stable and high-capacity electrodes by in-situ polymerization and synchronous conversion was developed. The electrode exhibited high hydrophilicity and stability due to the absence of a polymer binder, and its unique hierarchical porous structure contributed to its high electrochemical and lithium extraction performance. The porous carbon-supported LiFePO4 electrode prepared has a broad application prospect for lithium recovery from aqueous solutions by the green electrochemical technology.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Qi Liu, Haojie Ge, Can Liu, Ningluo Zhang, Yafei Guo, Tianlong Deng
Summary: A novel porogen-added ammonium phosphomolybdate-polyacrylonitrile (AMP-PAN-N20) was developed for removing Cs+ from geothermal water. The porous AMP-PAN-N20 beads exhibited smaller particle size, higher adsorption capacity, and faster adsorption rate compared to traditional AMP-PAN. The adsorption performance of AMP-PAN-N20 was stable even after ten cycles of adsorption, and it showed effective adsorption of Cs+ in a wide pH range and high concentration of competing ions.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Chi Ma, Chenyu Qi, Dingbo Wei, Zhenzhen Jiang, Yafei Guo, Nelson Belzile, Tianlong Deng
Summary: In this study, a new Zr-doped layered potassium thiostannate adsorbent (KZrTS) was synthesized and used for efficient Cs+ and Sr2+ adsorption. The adsorbent exhibited fast adsorption kinetics and high adsorption capacities. By coating KZrTS with polysulfone using wet spinning technology, micrometer-level filament-like absorbents (Fiber-KZrTS) were obtained with similar adsorption performance as the powder. Fiber-KZrTS also showed excellent reusability. Therefore, it has the potential for green and efficient cesium and strontium recovery from geothermal water.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Chao Gao, Jiaying He, Senjian Han, Yafei Guo, Shiqiang Wang, Tianlong Deng
Summary: A newly synthesized hybrid material of ZnFC-PA based on zinc phytate (Zn-PA) is developed as a promising adsorbent to efficiently remove Cs+ from contaminated water. The material exhibits top-class adsorption capacity and excellent stability in a wide range of pH, and shows rapid adsorption kinetics and superior selectivity in the presence of numerous competing ions. It also maintains high adsorption performance and reusability even in practical geothermal water.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Environmental
Xuezhen Wang, Xiaotong Jiang, Junmin Wu, Kaiyu Zhao, Yafei Guo, Tianlong Deng, Xiaoping Yu
Summary: With the development of new energy industry, the extraction of lithium from liquid minerals has attracted extensive attention. A novel phenolic resin-supported H2TiO3 foam was developed for Li+ recovery from aqueous solutions, exhibiting high adsorption capacity and excellent performance for low-concentration Li+ in geothermal water.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Feng Guo, Ju Miao, Lina Xu, Quanzhu Zhou, Tianlong Deng
Summary: A thin-film nanocomposite (TFN) NF membrane with high rejection, improved water permeability, and antibacterial activity was developed for sulfate separation in concentrated seawater. The membrane was modified by N-doped graphene quantum dots, dopamine, and piperazine, which enhanced the nanostructure of the active polyamide layer. The TFN-NF membrane exhibited promising performance in high-salinity solution separation, making it a potential candidate for practical application.
Article
Thermodynamics
Xiaomeng Liu, Mengying Chen, Guoyuan Xiong, Yafei Guo, Lingzong Meng, Tianlong Deng
Summary: The phase equilibria of the ternary system at two temperatures were investigated using experimental methods. The phase diagrams and physicochemical property diagrams were proposed for the system. A novel separation process of RbNO3 from NaNO3 solution was established, achieving a high separation rate. This work provides an efficient and reliable method for the recovery of RbNO3.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2023)
Article
Green & Sustainable Science & Technology
Qi Liu, Dingbo Wei, Chenyu Qi, Can Liu, Yafei Guo, Libin Yang, Tianlong Deng
Summary: This study synthesized a novel adsorbent K1.9Cr0.2Sn2.79S7 (KCTS) for the removal of 137Cs from nuclear wastewater. The doped materials exhibited enhanced stability and adsorption performance. The PVDF/KCTS microspheres, obtained by coating the powder material with PVDF, showed efficient adsorption capacity, acid-base tolerance, and selectivity. The Cs removal process in geothermal water demonstrated high distribution coefficient and separation factors between Cs+ and other ions. The adsorbent can be regenerated effectively with NaNO3, and its performance remains stable after multiple cycles.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Can Liu, Haojie Ge, Linxue Yan, Xiaoping Yu, Yafei Guo, Nelson Belzile, Tianlong Deng
Summary: A novel porous fiber-supported metal tin sulfide named PVC-[Me2NH2](2)Sn3S7 was designed for the removal of Cs from radioactive wastewater. It showed excellent adsorption performance with a high adsorption capacity and good stability. The optimized PVC-[Me2NH2](2)Sn3S7 fiber exhibited fast adsorption kinetics, wide pH range, and high separation coefficients for Cs+ and coexisting ions. It remained efficient even after 50 consecutive cycles, making it a promising adsorbent for selective Cs+ removal from wastewater.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Chao Gao, Wenfeng Yan, Senjian Han, Yafei Guo, Shiqiang Wang, Tianlong Deng
Summary: The leaked radioactive cesium poses urgent threats to human health and eco-systems, requiring immediate elimination. In this study, layer-by-layer assembled ferrocyanide composite fibers were developed using phytic acid (PA) and Zn2+ coordination. The resulting Cs-adsorptive fibers (ZnFC/PA/PSF) exhibited outstanding adsorption capacity (524.67 mg/g) and fast kinetics (25 min). Furthermore, they demonstrated excellent selectivity towards Cs+ in the presence of various co-existing ions, as confirmed in geothermal water (distribution coefficient, Kd = 2.5 x 104 mL/g). Additionally, ZnFC/PA/PSF displayed favorable pH stability with minimal dissolution of Zn and Fe, and showed satisfactory reusability after ten adsorption cycles. This work highlights the eco-friendly and cost-effective nature of ZnFC/PA/PSF composite fibers as adsorbents for treating Cs-contaminated water.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Shuangshuang Gu, Haoran Li, Kangrui Sun, Yafei Guo, Tianlong Deng, Lingzong Meng
Summary: The solid-liquid phase equilibria of a quaternary system (NaCl + NH4Cl + NaHCO3 + NH4HCO3 + H2O) were studied at 283.15 K and 313.15 K using the isothermal solution method. The phase diagrams showed four crystallization regions, five univariant solubility curves, and two invariant points. The area of NaCl, NaHCO3, and NH4Cl regions increased noticeably with increasing temperature, while the area of the NH4HCO3 region decreased significantly. The density and refractive index in the quaternary system varied regularly with changing concentration, and the calculated values using empirical equations agreed well with the experimental values.
JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Yifan Li, Zhenwei Wei, Jiayin Hu, Tianlong Deng
Summary: In this study, a new Cu(i)-containing metal organic framework named [Cu-I]-Cu-BTC was synthesized by incorporating Cu(i) active sites onto the surface of Cu-BTC using an in situ templated electrosynthesis method with an ionic liquid system as the electrolyte. The [Cu-I]-Cu-BTC/[Emim][OAc] system, utilizing 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]) as the base, exhibited efficient catalytic activity for the reactions of CO2 and propargylic alcohols under mild conditions, leading to high yields of alpha-alkylene cyclic carbonates. Additionally, the [Cu-I]-Cu-BTC/[Emim][OAc] system could be easily separated and reused multiple times without significant loss of catalytic activity, thanks to the synergistic roles of Cu(i) and [OAc](-) in activating C=C and hydroxyl groups in the propargylic alcohols.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Environmental
Chi Ma, Wenlei Fan, Wei Qin, Yafei Guo, Lichun Ma, Nelson Belzile, Tianlong Deng
Summary: A novel bismuth-doped layered tin sulfide (KBS) was synthesized and successfully applied for the removal of cesium from wastewater. The material exhibited fast and efficient adsorption with high capacity and remained reliable after multiple cycles. The structure and properties of KBS were explained by DFT calculations. Additionally, the combination of KBS with Zein and sodium alginate hydrogel solved the issues of recovery and secondary contamination.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
