Article
Chemistry, Analytical
Felisberto Goncalves Santos, Fernando Maya, Boaventura Freire dos Reis, Elias Ayres Guidetti Zagatto, Victor Cerda
Summary: A lab-in-syringe flow system using a solvent lighter than water for dispersive liquid-liquid micro-extraction is proposed for the spectrophotometric determination of lead in industrial residual waters. Xylene is selected as the alternative extracting solvent, providing a cleaner and more environmentally friendly approach. The method shows a high enrichment factor, a wide linear dynamic range, and a low detection limit, making it suitable for high sample throughput. Additionally, the proposed procedure has a small residue volume.
Article
Spectroscopy
Sangram B. Kharade, Rajvardhan K. Chougale, Umesh B. Barache, Kallappa R. Sanadi, Kishan C. Rathod, Shashikant H. Gaikwad, Yong-Chein Ling, Mansing A. Anuse, Ganesh S. Kamble
Summary: A novel spectrophotometric reagent PTPT was synthesized for liquid-liquid extraction and determination of copper(II). It effectively forms stable complex with copper(II) in basic medium and with the presence of pyridine. The method showed good stability and selectivity for copper(II) determination.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Applied
Sakha Pezhhanfar, Mir Ali Farajzadeh, Seyed Abolfazl Hosseini-Yazdi, Mohammad Reza Afshar Mogaddam
Summary: For the first time, MOF-70 was used as an adsorbent to develop a sample preparation method for the extraction of harmful compounds from plastic containers into beverages, resulting in high extraction recoveries, enrichment factors, and low limits of detection.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2021)
Article
Chemistry, Analytical
Anahid Rezaeefar, Mahboob Nemati, Mir Ali Farajzadeh, Mohammad Reza Afshar Mogaddam, Farzaneh Lotfipour
Summary: The study developed a combined method of dispersive micro solid-phase extraction and dispersive liquid-liquid microextraction for the simultaneous extraction of five mycotoxins in soymilk samples. The method showed low limits of detection and quantification, with acceptable repeatability in analyzing different samples from the market. The proposed approach successfully detected aflatoxin B1 in all tested samples and ochratoxin A in one sample.
MICROCHEMICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Manuel Ruben, Jens Hefter, Florence Schubotz, Walter Geibert, Martin Butzin, Torben Gentz, Hendrik Grotheer, Matthias Forwick, Witold Szczucinski, Gesine Mollenhauer
Summary: Despite being considered as having limited bioavailability, ancient rock-derived organic matter in Arctic fjord sediments is consumed by micro-organisms, potentially leading to greenhouse gas emissions.
Article
Geosciences, Multidisciplinary
Manuel Ruben, Jens Hefter, Florence Schubotz, Walter Geibert, Martin Butzin, Torben Gentz, Hendrik Grotheer, Matthias Forwick, Witold Szczucinski, Gesine Mollenhauer
Summary: Traditionally, rock-derived or petrogenic organic carbon has been considered non-bioavailable and not actively involved in the carbon cycle. However, recent studies suggest that this carbon may not be as inert as previously thought, especially in fjord systems with high influxes of petrogenic organic carbon, which could contribute to greenhouse gas emissions. The extent to which microorganisms utilize this organic carbon is not well understood, but it plays a significant role in the global carbon cycling. Radiocarbon analysis of intact polar lipid-fatty acids in marine sediments from Hornsund Fjord, Svalbard, revealed that bacterial communities in the area utilize 5 +/- 2% to 55 +/- 6% (average of 25 +/- 16%) of petrogenic organic carbon for biosynthesis after sediment redeposition. This suggests that the lack of recently synthesized organic carbon from primary production forces microorganisms to rely on petrogenic organic carbon as an alternative energy source, highlighting its importance in carbon cycling.
Review
Chemistry, Applied
Herbert Musarurwa, Nikita Tawanda Tavengwa
Summary: Deep eutectic solvents are versatile, green solvents that can be used in dispersive liquid-liquid micro-extraction techniques for pesticides. They have tunable properties and are more cost-effective, but also have some toxicity concerns.
Article
Chemistry, Applied
Malek Hassan, Furkan Uzcan, Usama Alshana, Mustafa Soylak
Summary: A novel method combining switchable-hydrophilicity liquid-liquid microextraction and magnetic nanoparticle-based dispersive solid-phase microextraction was proposed for the determination of erythrosine using UV/Vis spectrophotometry. The method showed excellent analytical performance with high sensitivity, low detection limits, and good reproducibility, making it suitable for the extraction and determination of erythrosine in food and consumer products.
Article
Multidisciplinary Sciences
Weidong Li, Jianping Qiu, Leila Baharinikoo, T. Ch Anil Kumar, Basim Al-qargholi, Shafik S. Shafik, Reathab Abbass, Shelesh Krishna Saraswat
Summary: In this study, a low-cost, fast, and easy-to-use ultrasound-assisted dispersive-magnetic nanocomposites-solid-phase microextraction (UA-DMNSPME) method was developed for the preconcentration and determination of trace amounts of Auramine O (AO) and methylene blue (MB) dyes in environmental water samples. The method utilized magnesium oxide nanoparticles (MgO-NPs) as adsorbents and showed high preconcentration factor, low limits of detection, and short extraction time. The proposed method can be considered efficient for the extraction and preconcentration of AO and MB from water and wastewater samples.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Analytical
Fatemeh Nazmi Miyardan, Mohammad Reza Afshar Mogaddam, Mir Ali Farajzadeh, Mahboob Nemati
Summary: With the industrialization of agriculture and the increasing use of pesticides, there is a growing need for new analysis methods to determine pesticide residues in vegetables. In this study, an efficient dispersive micro solid phase extraction method combined with dispersive liquid-liquid microextraction was used to extract eight pesticides from zucchini samples and determine them by gas chromatography. The method was validated and showed low detection limits and broad linear ranges. One of the pesticides, tebuconazole, was found and determined in a zucchini sample.
MICROCHEMICAL JOURNAL
(2022)
Article
Limnology
Cecilia Martin, Charlotte A. Young, Letizia Valluzzi, Carlos M. Duarte
Summary: About 15 Tg of plastic enter the ocean each year, with the majority accumulating in marine sediments rather than floating on the surface. From 1950 to 2010, an estimated 170 Tg (25-900 Tg) of nonfibrous plastic has accumulated in marine sediments globally, confirming their role as a major sink for plastic.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2022)
Article
Biochemical Research Methods
Yi-fang Zhang, Xiao-jun Zheng, Jie Tian, Shuang Hu, Xiao-hong Bai, Xuan Chen
Summary: A method combining RM-DLLME with HPLC-UV was developed for extraction and determination of 5 components of teicoplanin in human plasma, achieving effective enrichment and good linearity under optimized conditions. The method showed high enrichment, good selectivity and sensitivity, satisfactory precision and accuracy, making it suitable for analysis of teicoplanin in human plasma samples.
JOURNAL OF CHROMATOGRAPHY A
(2021)
Article
Biochemical Research Methods
Asmaa Kamal El-Deen, Galal Magdy, Kuniyoshi Shimizu
Summary: An eco-friendly dispersive liquid-liquid microextraction mediated with a reverse micelle and coupled to an HPLC-DAD was developed for the simultaneous determination of venlafaxine and agomelatine in dosage forms and human plasma. The method exhibited excellent preconcentration, high sensitivity, good accuracy, and high precision, and was applied to analyze the targeted analytes in real samples.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Chemistry, Analytical
Aysa Abbasalizadeh, Saeed Mohammad Sorouraddin, Mir Ali Farajzadeh, Elnaz Marzi, Mohammad Reza Afshar Mogaddam
Summary: A vortex-assisted dispersive micro-solid-phase extraction method using a new and green sorbent was developed for extracting five pesticides in fruit juice samples. Riboflavin was employed as an efficient sorbent, with broad linear ranges in calibration curves and low limits of detection and quantification. The proposed method demonstrated high enrichment factors and precision for concurrent extraction of pesticides in various fruit juice samples.
JOURNAL OF SEPARATION SCIENCE
(2022)
Article
Biochemistry & Molecular Biology
Li Zhou, Tong Wu, Chuanshan Yu, Shaowen Liu, Canping Pan
Summary: A simple analytical method using IL-DLLME and LC-ESI-MS was developed for the determination of two antifouling biocides. The method showed good recovery range, low RSD, and low LOD for the analytes. It was successfully applied for the analysis of freshwater and seawater samples.
Article
Environmental Sciences
Atefeh Zendehboudi, Azam Mohammadi, Sina Dobaradaran, Gabriel E. De-la-Torre, Bahman Ramavandi, Seyed Enayat Hashemi, Reza Saeedi, Emran Moradpour Tayebi, Ahmad Vafaee, Amirhossein Darabi
Summary: This study investigated the characteristics and ecological risks of microplastics (MPs) in ballast water for the first time, and found high levels of MP pollution. These findings contribute to our understanding of the sources and risks of microplastics in marine ecosystems.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Rose Boahemaa Pinto, Linda Bogerd, Martine van der Ploeg, Kwame Duah, Remko Uijlenhoet, Tim H. M. van Emmerik
Summary: Catchment-scale plastic pollution assessments provide insights into the sources, sinks, and pathways of plastic pollution. We propose an approach to quantify macroplastic transport and density in the Odaw catchment, Ghana, and find that the urban riverine zone has the highest transport, while the urban tidal zone has the highest riverbank and land macroplastic density.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Aliya Baidourela, Qian Sun, Gongxin Yang, Umut Halik, Zhongkai Dong, Kaixu Cai, Guili Sun, Wenya Zhang, Sisi Cheng
Summary: The study focused on heavy metal pollution in the green vegetation of a suburban industrial area in Tuokexun County, Xinjiang, China. The results showed that the overall level of heavy metal pollution in the soil was minor, with mercury (Hg) being the most severe contamination, likely caused by human activities. The composition of heavy metal elements in trees was more stable compared to grass and shrubs, with varying concentrations across different vegetation. Shrubbery was found to be the most effective in heavy metal restoration, and there were disparities in heavy metal enrichment among different vegetation types.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
James H. Bridson, Hayden Masterton, Beatrix Theobald, Regis Risani, Fraser Doake, Jessica A. Wallbank, Stefan D. M. Maday, Gavin Lear, Robert Abbel, Dawn A. Smith, Joanne M. Kingsbury, Olga Pantos, Grant L. Northcott, Sally Gaw
Summary: Plastic pollution has significant environmental impacts, largely due to chemical additives. However, the behavior of plastic additives in marine environments is not well understood. A marine deployment experiment was conducted to investigate the effects of weathering on the extractables profile of four types of plastics in New Zealand over a period of nine months. The concentration of additives in polyethylene and oxo-degradable polyethylene was strongly influenced by artificial weathering, while polyamide 6 and polyethylene terephthalate showed minimal change. These findings emphasize the importance of considering leaching and weathering effects on plastic composition when assessing the potential impact and risk of plastic pollution in receiving environments.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Alan G. Scarlett, Francis D. Spilsbury, Steven J. Rowland, Marthe Monique Gagnon, Kliti Grice
Summary: This study used diamondoid hydrocarbon distributions to identify the sources of environmental oil contamination. A suite of 20 diamondoids was found to accumulate in fish adipose tissue. The scatter plots of indices between fish and exposure oils showed a close to ideal 1:1 relationship, which can be used to determine the origin of the oil.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Shan Jiang, Mengmeng Wan, Kun Lin, Yanshan Chen, Rui Wang, Liju Tan, Jiangtao Wang
Summary: In this study, the concentration, composition, distribution, and sources of PCBs in surface seawater of the Bohai Bay were analyzed. The results showed that PCBs in the Bohai Bay had high concentrations and were primarily derived from land-based sources such as port activities and river inputs. The PCBs in the Bohai Bay may come from commercial PCBs and their incineration products, municipal landfills, wood and coal combustion, and industrial activities, etc.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Icaro S. A. Porto, Saulo V. A. Dantas, Caio S. A. Felix, Francisco A. S. Cunha, Jailson B. de Andrade, Sergio L. C. Ferreira
Summary: This study evaluated the risks of mercury levels in sardines consumed by low-income population in Salvador, Brazil. The results showed that the mercury content in the sampled sardines posed no risks to human health. This study is significant as most sardines in Salvador come from Todos os Santos Bay, which has a history of mercury contamination.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Jiahui Chen, Chengyu Yuan, Guanqun Zhai, Guangcheng Chen, Heng Zhu, Jun Liu, Yong Ye
Summary: This study investigated the combined influences of species selection and site elevation on greenhouse gas fluxes from restored mangrove soils. The results suggest that Avicennia marina should be selected for mangrove restoration to minimize carbon release and reduce the influence of greenhouse gas fluxes on the global greenhouse effect.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Emmanuel Onyeabor, Uju Obuka
Summary: The Gulf of Guinea region in Africa is a significant area for coastal countries, playing a vital role in their economic and environmental development. This study aims to reduce marine plastic pollution in the region by utilizing legal instruments.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Yuanli Liu, Stephan Luttjohann, Alvise Vianello, Claudia Lorenz, Fan Liu, Jes Vollertsen
Summary: Large area attenuated total reflectance-Fourier transform infrared spectroscopy (LAATR-FTIR) is a novel technique for detecting small microplastics, with limited accuracy for large microplastics. However, it shows promise in homogeneous matrices. The spectra quality is comparable between transmission mode and LAATR mode.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Phuc T. D. Le, Andrew M. Fischer, Britta D. Hardesty, Heidi J. Auman, Chris Wilcox
Summary: This study explores the relationship between ocean currents and the accumulation of floating marine debris (FMD) and finds that higher concentrations of FMD are associated with frontal frequencies (FF). FMD is primarily trapped in accumulation zones between fronts and the coastline, which have high biodiversity value.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Rosa Sawan, Perine Doyen, Florence Viudes, Rachid Amara, Celine Mahfouz
Summary: Few studies have examined the impact of urbanization and meteorological events on microplastics discharged into the sea through rivers. Surface water samples were collected from two Lebanese rivers, with differing degrees of urbanization, during dry and wet periods. The results showed that the most industrialized river had a significantly higher abundance of microplastics compared to the less-industrialized river. There was also a correlation between particle contamination and the season at each site, with microplastic concentrations highest on the first day of the wet season. These findings highlight the importance of considering meteorological events in accurately assessing plastic pollution influx into coastal waters.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Katherine R. Shaw, Jonathan L. Whitney, Eileen M. Nalley, Madeline C. Schmidbauer, Megan J. Donahue, Jesse Black, Raquel N. Corniuk, Kellie Teague, Rachel Sandquist, Catherine Pirkle, Rachel Dacks, Max Sudnovsky, Jennifer M. Lynch
Summary: This study examines the ingestion of plastic in reef fish in the Republic of the Marshall Islands. Plastic particles were found in the gastrointestinal tracts of multiple fish species. However, further analysis revealed that these particles were actually natural materials and posed no threat to human consumers.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Revati Hardikar, C. K. Haridevi, Shantaj Deshbhratar
Summary: This study investigated the variability in phytoplankton functional structure using a trait-based approach and explored the relationship between species traits and environmental factors, as well as their impact on ecosystem functioning. The results revealed that morphological traits, temperature, and ammonia played a decisive role in the seasonal succession of phytoplankton species. It was found that certain traits favored higher biomass production but might hinder energy transfer efficiency. The strong correlation between environmental variables and phytoplankton functional structure supports the practical implementation of a trait-based approach in studying phytoplankton community dynamics under different environmental conditions.
MARINE POLLUTION BULLETIN
(2024)
Article
Environmental Sciences
Engki A. Kisnarti, Nining Sari Ningsih, Mutiara R. Putri, Nani Hendiarti, Bernhard Mayer
Summary: This study examines the movement patterns of plastic marine debris in Indonesian waters, revealing that Indonesia contributes significantly to transboundary marine debris in the Pacific Ocean, Indian Ocean, and the South China Sea. Most of the debris remains in Indonesian waters and moves back and forth due to the influence of monsoon currents.
MARINE POLLUTION BULLETIN
(2024)