Article
Chemistry, Applied
Sueleyman Bodur, Sezin Erarpat, Omer Faruk Tutar, Sezgin Bakirdere
Summary: This study proposes a method for speciation analysis of arsenic in edible oils using the HPLC-CFHG-FAAS system combined with the VA-RP-SFDF-LPME method. It can accurately quantify both arsenite and total inorganic arsenic in the matrix.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2023)
Article
Chemistry, Analytical
Mason E. Bonacci, M. Ines G. S. Almeida, Yanlin Zhang, Spas D. Kolev
Summary: This study developed a novel microfluidic paper-based analytical device (μPAD) for the speciation of inorganic arsenic in environmental aqueous samples. The device showed advantages of simplicity, high sensitivity, and low detection limit.
Article
Chemistry, Analytical
Shuang Ye, Lanlan Li, Yue Ou, Weijia Li, Shu Zhang, Ke Huang, Hong Luo, Zhirong Zou, Xiaoli Xiong
Summary: A miniaturized/portable visual colorimetric system based on hydride generation headspace solid phase extraction (HG-HS-SPE) was proposed for arsenic detection by naked eyes. The results demonstrated good anti-interference properties and applicability for water sample detection.
ANALYTICA CHIMICA ACTA
(2022)
Article
Chemistry, Analytical
Jing Xiao, Chenxi Jiang, Lanlan Li, Shuang Ye, Shu Zhang, Xiaoli Xiong, Zhirong Zou, Zhengwen Huang
Summary: A dual-mode analytical system based on hydride generation iodine-starch was developed for the detection of inorganic arsenic using UV-vis spectrophotometer and smartphone RGB. The system utilized hydride generation to introduce the gaseous sample, and the resulting AsH3 was transported into an iodine-starch solution, causing the solution to change color from dark blue to colorless, which could be recorded by both the spectrophotometer and smartphone RGB simultaneously. The method exhibited good accuracy and applicability, with recoveries ranging from 94% to 108%. A low detection concentration of 0.01 μg mL-1 was achieved, meeting the analysis requirement for As(III) in water samples. This analytical system shows potential for field analysis of inorganic arsenic.
MICROCHEMICAL JOURNAL
(2023)
Article
Engineering, Environmental
Andreina Garcia, Maibelin Rosales, Minju Thomas, Giovanni Golemme
Summary: Versatile materials for oxidizing As(III) into less hazardous As(V) species have attracted increasing attention. Ti-SBA-15, prepared by coating 7% anatase TiO2 on pre-formed SBA-15, showed efficient adsorption and photo-oxidation of As(III) at different pHs. The presence of TiO2 on SBA-15 promoted reactive oxygen species generation, leading to successful oxidation of As(III). Despite covering only a small percentage of the surface, TiO2 exhibited unprecedented photocatalytic behavior, making it a prominent catalyst for arsenic removal from water.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Adrian Garcia-Figueroa, Montserrat Filella, Tomas Matousek
Summary: A method for the speciation analysis of inorganic germanium, monomethyl germanium, and dimethyl germanium in environmental waters has been developed using hydride generation and ICP-MS/MS detection. The method achieved low detection limits and was successfully applied to certified reference materials.
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
Engineering, Environmental
Nenad M. Zaric, Simone Braeuer, Walter Goessler
Summary: This study determined arsenic concentrations and speciation analysis in honeybees for the first time, finding that the highest concentrations were near coal fired thermal power plants and urban regions. The most effective extraction method for total arsenic from honeybee samples was hot water at 90 degrees C. Inorganic arsenic accounted for the majority of arsenic species in honeybees, except in an industrial city where a significant portion was present as DMA.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Applied
Amado Velazquez-Palenzuela, Burak Ulusoy, Kim Dam-Johansen, Jakob Munkholt Christensen
Summary: Photocatalytic coatings are investigated for their ability to remove NOx gases by converting them into nitrate via photo-oxidation. This study focuses on the conversion of nitrite to nitrate in the aqueous phase and its implications for NOx immobilization in humid environments. The performance of TiO2 nanoparticles and corresponding acrylic binder coatings in the conversion of nitrite is studied using colorimetric and spectroscopic methods.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Applied
Chenxi Jiang, Shuang Ye, Jing Xiao, Chao Tan, Huimin Yu, Xiaoli Xiong, Ke Huang, Yujia Deng, Zhirong Zou
Summary: A miniaturized/portable dual-mode colorimetric analytical system was established using hydride generation as a sampling technique, for the determination of inorganic arsenic in honey and drinking water samples. The system allowed for visual colorimetric readout and RGB readout through a smartphone simultaneously. Good recoveries (90-116%) were achieved for various samples and their spiked samples, confirming the accuracy and potential field analysis application.
Article
Environmental Sciences
Miao Liu, Fengxia Sun, Yuzhen Lv, Yuxin Xu, Ming Li, Yujun Wang, Xiting Yin, Hao Jiang
Summary: The study demonstrated that N-ZrO2-BC has strong adsorption and fixation properties on arsenic (V) in soil and water, significantly improving the stabilization efficiency of arsenic in soil and meeting the quality standards.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Applied
Zdenka Slejkovec, Leon Gorse, Ana Grobler, Marta Jagodic, Ingrid Falnoga
Summary: Total arsenic concentration was highest in brown and parboiled rice, and lowest in basmati rice. Dimethylarsinic acid and monomethylarsonic acid accounted for over 50% of total arsenic in some cases. Total arsenic concentration in rice may be a better health hazard indicator than inorganic arsenic concentration.
Article
Chemistry, Analytical
Meiyi Xie, Xiaotang Hao, Xun Jiang, Weiting Liu, Tiantian Liu, Han Zheng, Mei Wang
Summary: The method combines ultrasound-assisted dual-cloud point extraction with high-performance liquid chromatography with hydride generation atomic fluorescence spectrometry to simultaneously preconcentrate and determine mercury species in water and soil samples. The detection process, including two extraction steps, takes only 6 minutes with a wide linear range and low detection limits for inorganic mercury and methylmercury. It is suitable for the determination of trace mercury in environmental samples with good recoveries.
JOURNAL OF SEPARATION SCIENCE
(2021)
Article
Chemistry, Applied
Massimo Dell'Edera, Chiara Lo Porto, Ilaria De Pasquale, Francesca Petronella, M. Lucia Curri, Angela Agostiano, Roberto Comparelli
Summary: This review provides a representative survey of nanostructured TiO2 coatings obtained by different deposition techniques, discussing characteristics, advantages, real applications, and commercially available products. Overall, current coating technologies show significant promise for large-scale applications of nanostructured TiO2 in the environmental field.
Article
Environmental Sciences
Amanda Jo Zimmerman, Danira Garcia Gutierrez, Negar Shaghaghi, Aakriti Sharma, Amrika Deonarine, Gautier Landrot, David C. Weindorf, Matthew G. Siebecker
Summary: This study systematically investigates the mobility of arsenic-enriched titanium dioxide water treatment residuals (TiO2 WTRs), and finds that a significant portion of arsenic can be extracted when exposed to phosphate solutions. Macroscopic desorption experiments and X-ray absorption spectroscopy (XAS) confirm the formation of inner-sphere bonds between arsenic and TiO2 particles. Additionally, incubation experiments reveal the reduction of arsenic(V) to arsenic(III) in solution. The high mobility of arsenic and the potential for reduction present important risks, particularly in agriculturally important areas where waste products are not properly managed.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Bianca Santos Pinheiro, Ailton Jose Moreira, Luana Lorca Sartori Gimenes, Carolina Dakuzaku Freschi, Gian Paulo Giovanni Freschi
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2020)
Article
Marine & Freshwater Biology
Luana Lorca Sartoris Gimenes, Gian Paulo Giovanni Freschi, Irineu Bianchini Junior, Marcela Bianchessi da Cunha Santino
AQUATIC TOXICOLOGY
(2020)
Article
Environmental Sciences
Elaine Cristina Paris, Joao Otavio Donizette Malafatti, Camila Rodrigues Sciena, Luiz Ferreira Neves Junior, Alessandra Zenatti, Marcia Tsuyama Escote, Ailton Jose Moreira, Gian Paulo Giovanni Freschi
Summary: This study investigated the photocatalytic efficiency and viability of niobium pentoxide nanoparticles decorated with magnetic ferrite for atrazine photodegradation. The results showed that the magnetic Nb2O5-based nanocomposites exhibited efficient photocatalytic response and could be effectively removed magnetically from the aqueous medium, providing a potential alternative for enhancing wastewater removal processes and promoting reuse in advanced oxidative processes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Carmen Greice Renda, Cynthia Paola Contreras Medrano, Leonardo Jose Dalla Costa, Fred Jochen Litterst, Elisa Maria Baggio Saitovitch, Claudio Jose Magon, Alexandre Jose Gualdi, Tiago Venancio, Roberto Bertholdo, Ailton Jose Moreira, Gian Paulo Giovanni Freschi, Alessandra de Almeida Lucas
Summary: This study investigates the intermediate carbon structures containing iron during the graphitization process using various spectroscopic techniques. The PRFc material treated at 1000 degrees C exhibited high efficiency in removing atrazine and affected the degradation mechanism of atrazine and the formation of atrazine-2-hydroxy (HAT).
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Environmental Sciences
Ailton Jose Moreira, Carolina Dakuzaku Freschi, Ernesto Chaves Pereira, Gian Paulo Giovanni Freschi
Summary: A fast, efficient, and non-chromatographic method was developed for extraction and speciation analysis of N-compounds in environmental samples. The method showed good LODs and recovery rates when applied to real water, soil, and sediment samples.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Environmental Sciences
Edson Tobias de Jesus, Ailton Jose Moreira, Mayara Coelho Sa, Gian Paulo Giovanni Freschi, Miryam Rincon Joya, Maximo Siu Li, Elaine Cristina Paris
Summary: Various photocatalytic nanomaterials have been developed for environmental remediation to address pollution caused by different organic pollutants. In this study, Nb2O5 nanofibers were fabricated using electrospinning technique, exhibiting controlled crystallinity and a high specific surface area to enhance photoactivity. The nanofibers showed efficient photocatalytic degradation of dyes (RhB, MB) and an emergent pollutant (FLX) under UV light, suggesting a promising alternative for environmental cleanup.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Elaine Cristina Paris, Joao Otavio Donizette Malafatti, Ailton Jose Moreira, Lilian Cruz Santos, Camila Rodrigues Sciena, Alessandra Zenatti, Marcia Tsuyama Escote, Valmor Roberto Mastelaro, Miryam Rincon Joya
Summary: In this study, photocatalytic CuO nanoparticles were successfully decorated on a magnetic support for efficient water remediation and bactericidal control under visible light irradiation. The nanocomposite exhibited high photocatalytic activity, magnetic recoverability, and low toxicity to the environment and organisms.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Ailton Jose Moreira, Sherlan Lemos, Dyovani Coelho, Lucia Mascaro, Gian Freschi, Ernesto Pereira
Summary: In this study, a spectrophotometric-chemometric approach was used to monitor the degradation of atrazine (ATZ) and its by-products after photolytic and photocatalytic oxidation. The results showed that the Spec-Chem method provided accurate and statistically comparable data to the reference technique of HPLC. The study also introduced a new hypothesis for the kinetic calculation of ATZ degradation, which showed a high correlation and optimal fit with the experimental data obtained.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Ailton J. Moreira, Dyovani Coelho, Jeferson A. Dias, Lucia H. Mascaro, Gian P. G. Freschi, Valmor R. Mastelaro, Ernesto C. Pereira
Summary: In this study, a synergistic use of microwave energy and Microwave Discharge Electrodeless Lamp (MDEL) as a UV_Vis light source was applied for the first time to synthesize a photocatalyst (Smdoped TiO2) for degrading atrazine (ATZ) under UV-A light. The doped material showed lower recombination rates and higher performance in ATZ degradation compared to pristine TiO2 and Sm-doped TiO2. The photocatalytic degradation mechanism indicated that the doped material exhibited high efficiency in activating the ATZ hydrolysis reaction and generating more hydroxyl radicals. Moreover, the photoactivity of the catalyst remained stable even after multiple application cycles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Joao Otavio Donizette Malafatti, Ailton Jose Moreira, Elaine Cristina Paris, Leydi Julieta Cardenas Flechas, Otavio Augusto Poli Pereira, Miryam Rincon Joya
Summary: Cobalt oxide nanoparticles doped with nickel and reduced graphene oxide were prepared via sol-gel and hydrothermal methods. The resulting nanoparticles exhibited small size, typical crystal structure, and excellent antibacterial and photocatalytic properties.
Article
Environmental Sciences
Cristiane De Oliveira, Carmem G. Renda, Ailton J. Moreira, Ernesto C. Pereira, Gian P. G. Freschi, Roberto Bertholdo
Summary: In recent decades, the growth of world agricultural activity has led to an increased presence of emerging pollutants like atrazine in water ecosystems. This study investigated the use of a graphitic-porous-carbon-based material with magnetic domains for the removal of atrazine from aqueous solutions. The material showed high adsorption efficiency for atrazine and its adsorption mechanisms were studied in detail.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Ailton. J. Moreira, Joao O. D. Malafatti, Camila R. Sciena, Elaine C. Paris
Summary: In this study, a Nb2O5 semiconductor was prepared by the hydrothermal method for the degradation of Atrazine (ATZ) under UV light. It was found that a 70 mL volume of 5 mg L-1 ATZ solution containing 10 mg of catalyst achieved 70% photocatalytic degradation of ATZ in 30 minutes under UV light, which was a 46% improvement compared to photolysis. The intermediates were efficiently monitored using molecular absorption spectrometry and H-1 NMR, revealing the ATZ photocatalytic degradation mechanism mediated by Nb2O5 under UV light.
RESEARCH ON CHEMICAL INTERMEDIATES
(2023)
Article
Engineering, Environmental
Ailton. J. Moreira, Barbara R. M. dos Santos, Jeferson A. Dias, Pietra T. Rabello, Dyovani Coelho, Lucia H. Mascaro, Gian P. G. Freschi, Yara G. Gobato, Helder V. A. Galeti, Valmor R. Mastelaro, Ernesto Chaves Pereira
Summary: The degradation of the emerging pollutant fluoxetine (FLX) and the formation of potentially present by-products were investigated through photocatalytic processes using modified TiO2. The photocatalysts showed the ability to produce hydroxyl radicals (& BULL;OH) and achieved 100% degradation of RhB under UV or visible irradiation. LC-MS-Q-TOF analysis confirmed an alternative mechanism for FLX degradation mediated by one of the by-products. Other by-products were also identified after photodegradation, indicating their presence in FLX-contaminated ecosystems cannot be ignored. Therefore, the high-performance photocatalysts obtained in this study are viable alternatives for the remediation of organic pollutants in aquatic ecosystems.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Joao O. D. Malafatti, Ailton J. Moreira, Camila R. Sciena, Thales E. M. Silva, Gian P. G. Freschi, Ernesto C. Pereira, Elaine C. Paris
Summary: This study investigated the application of nanomaterials based on Nb2O5 and HAP in the photodegradation of Prozac (R) and TFMP, revealing efficient pollutant removal and photodegradation kinetic constants. Detailed mechanisms of photodegradation were studied, showing that adsorptive, oxidative, and photolytic processes work together in removing and converting compounds into by-products. Toxicity assessments on plant growth indicated that certain by-products were more toxic than Prozac (R), potentially causing phytotoxicity at the cellular level.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
