Article
Chemistry, Analytical
Liziane Oliveira de Avila, Daiane Placido Torres, Eliezer Quadro Oreste, Meibel Teixeira Lisboa, Carlos Augusto Posser Silveira, Anderson Schwingel Ribeiro, Adriane Medeiros Nunes, Rosane Martinazzo
Summary: An analytical method using atomic absorption spectrometry coupled to hydride technique with ultrasound assisted acidic extraction was developed for determination of inorganic arsenic species in retorted oil shale slurry. Trivalent arsenic was measured after sample stabilization and reaction with a reducing agent, while total inorganic arsenic was assessed by the pre-reduction of As(V) to As(III) and the difference in concentration between total inorganic arsenic and As(III). The limit of quantification was 3.7 mg kg(-1) for As(III) and 1.3 mg kg(-1) for itAs.
ANALYTICAL LETTERS
(2023)
Article
Chemistry, Applied
Bruno Elias dos Santos Costa, Nivia Maria Melo Coelho
Summary: A novel solid phase extraction procedure was developed for speciation of inorganic arsenic in rice samples. The method showed advantages of short extraction time, good recovery, and low residue formation, with high detection sensitivity and pre concentration factor for As(III). The procedure has potential for successful application in monitoring arsenic in real samples.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2021)
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
Chemistry, Applied
Julieta R. Camurati, Agustin Londonio, Patricia Smichowski, Vanesa N. Salomone
Summary: The study utilized an on-line HPLC-UV-thermo-oxidation-HGAFS system to analyze arsenic speciation in dried seaweeds, showing that arsenosugars are the most abundant compounds in the investigated seaweeds. The method provided an accurate analysis approach for quantifying arsenic compounds.
Article
Environmental Sciences
Meng Yang, Meichun Zhou, Xin Liu, Fengying Li, Mindong Chen, Huiming Li, Xin Qian, Feihu Li, Jun Zheng
Summary: The study assessed the spatial variation of arsenic species in PM2.5 in Nanjing, China, finding that As(V) was the dominant form. Spatial heterogeneity was moderate for As-total, As(III), and As(V), while DMAs(V) showed considerably high levels. Local road traffic contributed less to As concentration in PM2.5 compared to industrial emissions and biovolatilization sources.
AIR QUALITY ATMOSPHERE AND HEALTH
(2021)
Article
Environmental Sciences
Alireza Mahdavi, Justin Dingle, Arthur W. H. Chan, Jeffrey A. Siegel
Summary: Filters in HVAC systems can serve as air-cleaning and sampling devices, but may not always effectively remove particles and trace metals due to other dominant source and loss mechanisms. While QFF shows promise for TSP and some trace metals, limitations in size distribution analysis may affect the estimation of PM concentrations.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Analytical
Yaru Zhang, Xing Na, Yunbin Shao, Jixin Liu, Di Tian, Xuefei Mao
Summary: The developed method combining ultrasonic assisted slurry sampling and in-situ DBD trap-OES technology is capable of fast determination of arsenic in soil. With simple pretreatment procedures, low detection limit, and good accuracy, it is suitable for soil analysis.
ANALYTICAL LETTERS
(2022)
Article
Engineering, Chemical
Marie Choel, Anastasia Ivanovsky, Antoine Roose, Mona Hamze, Anne-Marie Blanchenet, Nicolas Visez
Summary: The coagulation of airborne particles on the surface of allergenic pollen grains is not well understood. This study quantitatively assessed the particulate deposition on allergenic pollen surfaces by sampling birch pollen grains (BPGs) during pollination. It was found that, on average, polluted BPGs carried 2 +/- 1 particles, representing an average surface coverage of 0.95%. The main coagulation process was hypothesized to be particle deposition by gravitational settling, although the effects of electric charges carried by pollen remain unknown. The presence of particle-polluted allergenic pollens appears to be common in the urban atmosphere, even under low air pollution conditions.
JOURNAL OF AEROSOL SCIENCE
(2022)
Article
Environmental Sciences
Xingle Chai, Feishu Cao, Chaolan Zhang, Kai Zhong, Linjiang Jiang
Summary: High concentrations of arsenic and antimony contamination in soil pose a potential risk to the ecological environment and human health. This study utilized Aspergillus niger fermentation broth as a washing agent to effectively remove As and Sb from polluted soil. The results showed that oxalic acid played a significant role in the removal process. Batch experiments determined the optimal conditions for the removal rate of Aspergillus niger fermentation broth. After three cycles of washing, the removal rates for arsenic and antimony were significantly high. The black Aspergillus niger fermentation broth exhibited great potential as a washing agent for the remediation of As and Sb-contaminated soils.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Pramodt Srinivasula, Rochish M. Thaokar
Summary: A study is conducted to examine the unique features in the behavior of airborne particles near curved surfaces influenced by aerodynamic and electrostatic forces. Particle tracing investigation is carried out in numerically fabricated steady vortices near curved electrodes. The study reveals phenomena such as electrostatic capture, segregation, and manipulation of particles based on their size, inertia, and external electric field.
JOURNAL OF ELECTROSTATICS
(2023)
Article
Chemistry, Analytical
Daniel E. Bustos, Juan A. Toro, Marisol Briceno, Ricardo E. Rivas
Summary: In this study, a methodology for the simultaneous determination of Cd and Ni in powder chocolate samples using high-resolution continuum source graphite furnace atomic absorption spectroscopy (HR-CS-GF-AAS) and slurry sample analysis was developed. This method eliminates the need for acid digestion of the samples and shows no deterioration of the graphite tubes. Simultaneous quantification of Cd and Ni was achieved by using a slow heating ramp atomization.
Article
Engineering, Electrical & Electronic
Songfei Su, Jinyan Chen, Pengzhan Liu, Mengxin Sun, Huanbo Cheng
Summary: This study presents a method for trapping and collecting airborne particulate matter using an ultrasonic device system, which has been validated through numerical simulations and experiments and investigated the impact of various parameters on collection performance. Due to its contactless and mild handling attributes, this ultrasonic airborne particulate matter sampler can avoid clogging and secondary pollution issues compared to other methods.
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2021)
Article
Environmental Sciences
Jin Xie, Xiao-Dong Niu, Jiao-Jiao Xie, Kai-Qiang He, Meng-Dan Shi, Su-Juan Yu, Chun-Gang Yuan, Jing-Fu Liu
Summary: This study analyzed the distribution and chemical speciation of arsenic in atmospheric particulate matters collected from Baoding, China. Results showed that As tends to accumulate on fine particles, with iAs(V) being the dominant component. It was also found that trimethylarsine oxide (TMAO) was widely present in the samples.
JOURNAL OF ENVIRONMENTAL SCIENCES
(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
Food Science & Technology
Joelem Carvalho Melo, Wellington Correia Carvalho, Elane S. Boa Morte, Rennan Geovanny O. Araujo, Daniele Cristina M. B. Santos
FOOD ANALYTICAL METHODS
(2020)
Article
Engineering, Environmental
Vaniele S. Ribeiro, Sidnei O. Souza, Silvanio Silverio L. Costa, Tarcisio S. Almeida, Sarah Adriana R. Soares, Maria Gracas A. Korn, Rennan Geovanny O. Araujo
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2020)
Article
Spectroscopy
Sidimar S. Oliveira, Vaniele S. Ribeiro, Tarcisio S. Almeida, Rennan Geovanny O. Araujo
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2020)
Article
Spectroscopy
Tarcisio S. Almeida, Marlon Brancher, Henrique de Melo Lisboa, Davide Franco, Tatiane A. Maranhao, Daniel L. G. Borges
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2020)
Article
Environmental Sciences
Klaiani Bez Fontana, Rennan Geovanny O. Araujo, Fernando J. S. de Oliveira, Vera L. A. F. Bascunan, Tatiane de Andrade Maranhao
Summary: The research investigated the concentrations of rare earth elements (REEs) in drill cuttings from oil and gas exploration wells in ultra deep coastal waters of Brazil at different depths. The study found that the concentrations of REEs in the drill cuttings varied at different depths, and statistical methods like principal component analysis (PCA) and hierarchical cluster analysis (HCA) could be used to identify similarities and trends between drill cutting samples at different depths. The study also suggested that drill cuttings could potentially serve as an alternative source for REEs extraction.
Review
Chemistry, Analytical
Adriana Gioda, Karmel Beringui, Elizanne P. S. Justo, Luciana M. B. Ventura, Carlos G. Massone, Silvanio Silverio Lopes Costa, Sidimar Santos Oliveira, Rennan Geovanny Oliveira Araujo, Nivia de M. Nascimento, Hemmely Guilhermond S. Severino, Christiane B. Duyck, Jefferson Rodrigues de Souza, Tatiana D. Saint Pierre
Summary: Atmospheric pollution is a significant issue with impacts on the environment and human health. Understanding the composition and concentration levels of pollutants is crucial for reducing emissions and setting limits. Advances in air sampling and analysis methods have been made, and data analysis plays a key role in informing government actions against air pollution.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Cinira Mello Santana, Thais Luz de Sousa, Abdon Luiz Ornelas Latif, Lorena Santos Lobo, Gleice Rayanne da Silva, Hemerson Iury Ferreira Magalhaes, Mariangela Vieira Lopes, Clicia Maria de Jesus Benevides, Rennan Geovanny Oliveira Araujo, Daniele Cristina Muniz Batista dos Santos, Anibal de Freitas Santos Junior
Summary: Cosmetics, especially eye shadows, are widely consumed worldwide and have a significant impact on the economy. This study analyzed the multielement composition of eye shadows sold in the Brazilian market, finding that many elements exceeded the recommended maximum tolerable limits, posing potential risks to human health and the environment.
Article
Chemistry, Multidisciplinary
Samir H. Santos, Silvanio S. L. Costa, Sidnei O. Souza, Karina S. Garcia, Sarah A. R. Soares, Carlos A. B. Garcia, Tarcisio S. Almeida, Rennan G. O. Araujo
Summary: A method for multi-element determination in powder refreshment using ICP OES was proposed, with chemometric tools used to optimize sample preparation conditions and spectrometer operation. The reliability of the method was confirmed through addition and recovery tests and analysis of certified reference materials, with LOQ between 0.02 and 36 µg g(-1). The method was found to be adequate for the determination of inorganic constituents in powder refreshment samples.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Sidnei O. Souza, Dayara V. L. Avila, Carolina M. O. Prado, Silvanio S. L. Costa, Rennan G. O. Araujo
Summary: In this study, an analytical method utilizing EDXRF for the determination of Ba, Cu, Ni, V, and Zn in medicinal herbs was applied. PCA and HCA revealed the formation of two distinct groups with different compositions, as well as the exceeding of the maximum allowed limit for Ni in some samples.
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
(2021)
Article
Biochemistry & Molecular Biology
Filipe B. Santana, Hilaria F. A. Silveira, Lais A. Souza, Sarah Adriana R. Soares, Anibal de Freitas Santos Junior, Rennan Geovanny O. Araujo, Daniele Cristina M. B. Santos
Summary: An acid digestion procedure was optimized for forage palm using a closed digestor block and full 2(4) factorial design. The analysis of the forage palm revealed rich macroelements and microelements content, as evaluated with certified reference materials. Furthermore, principal component analysis and hierarchical cluster analysis revealed trends in mineral composition among the samples.
BIOLOGICAL TRACE ELEMENT RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Rui Jesus Lorenzo Garcia, Jucelino Balbino da Silva Junior, Ilene Matano Abreu, Sarah Adriana Rocha Soares, Rennan Geovanny Oliveira Araujo, Eliane Soares de Souza, Helio Jorge Severiano Ribeiro, Gisele Mara Hadlich, Antonio Fernando de Souza Queiroz
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2020)
Article
Chemistry, Analytical
Dayara Virginia L. Avila, Sidnei Oliveira Souza, Victor Cerda, Rennan G. O. Araujo
ANALYTICAL METHODS
(2020)