Article
Environmental Sciences
Youhei Yamashita, Daiki Kojima, Natsumi Yoshida, Hideaki Shibata
Summary: Atmospheric deposition of soot is likely a major source of dissolved black carbon (DBC) in streams, which is linearly related to dissolved organic carbon (DOC) concentration. The quality of DBC correlates with qualitative parameters of bulk dissolved organic matter (DOM), indicating a linkage between the transfer mechanism of soot-derived DBC and high-molecular-weight aromatic DOM.
Article
Environmental Sciences
V Mangal, W. Y. Lam, H. Huang, E. J. S. Emilson, R. W. Mackereth, C. P. J. Mitchell
Summary: This study investigates the molecular composition of dissolved organic matter (DOM) and its relationship with mercury transport and transformations. High-resolution mass spectrometry is used to characterize DOM compound classes, DOM aromaticity, and the nominal oxygenation state of carbon across thirteen small boreal forest streams in central Canada. The results show significant differences in the abundance and classes of DOM compounds correlated with inorganic mercury and methylmercury concentrations across seasons and between mercury forms. Nitrogen and sulfur containing DOM compounds are most often positively correlated with inorganic mercury concentrations in late spring, while low-oxidized lignins are more important in fall. Low-oxidized lignins and hydrolysable tannins account for a large proportion of DOM-MeHg correlations, regardless of season. The study also reveals that the strongest correlations between inorganic mercury and DOM occur across a wide range of carbon oxygenation states, suggesting that DOM involved in inorganic mercury transport encompasses a wide range of polarities and thermodynamic stabilities. In contrast, DOM molecules exclusively correlated with MeHg concentrations have more positive carbon oxygenation states and aromatic qualities, indicating preferential transport of MeHg with more stable and aromatic DOM molecules. DOM molecules correlated with both inorganic mercury and MeHg concentrations are only found in late spring.
Article
Environmental Sciences
Zhixiang She, Jin Wang, Chen He, Zhengfeng Jiang, Xin Pan, Meichen Wang, Ding Ma, Quan Shi, Zhengbo Yue
Summary: This study used FT-ICR-MS and biogeochemical analysis to investigate the variations of dissolved organic matter (DOM) and its environmental controls in acidic pit lakes. The results revealed distinct DOM pools in pit lakes, with acidic ones containing more lipid-like compounds. Acidic and metal-rich conditions promoted DOM heterogeneity, while acidity and metals enhanced DOM photodegradation, reducing its content, chemo-diversity, and aromaticity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Chen Gong, Ruyuan Jiao, Weijin Yan, Qibiao Yu, Qingqian Li, Peipei Zhang, Yanqiang Li, Dongsheng Wang
Summary: This study analyzed the chemical characteristics and spectral and mass spectrometry of DOM in headwater streams. The results showed that anthropogenic markers of sewage were higher in headwater streams compared to the main stream of the Changjiang River. In situ degradation experiments revealed a decrease in molecular weight and an increase in degradation products of DOM. The study emphasized the importance of identifying the sources and transformation processes of DOM in headwater streams for future drinking water treatment.
Article
Chemistry, Applied
Yueqi An, Shanbai Xiong, Yanping Qian, Michael C. Qian
Summary: Transglutaminase-induced cross-linking can regulate the aroma release of surimi gels by affecting the concentrations and release rates of aroma compounds, with harder gels releasing fewer aroma compounds. Increasing cross-linking degrees first decrease, then significantly increase the release of aroma compounds, showing a negative correlation with the springiness and gel strength of surimi gels.
Article
Engineering, Environmental
Yongqiang Zhou, Lei Zhou, Yunlin Zhang, Guangwei Zhu, Boqiang Qin, Kyoung-Soon Jang, Robert G. M. Spencer, Dolly N. Kothawala, Erik Jeppesen, Justin D. Brookes, Fengchang Wu
Summary: Urbanization leads to increased inputs of nonpoint-source dissolved organic matter to lakes, affecting the chemical composition and biolability of the organic matter. This study found that increased urban land use is associated with higher trophic level, chlorophyll-a concentrations, bacterial abundance, and organic carbon content in lakes, with a higher relative contribution of biolabile aliphatic and peptide-like fractions. However, factors such as catchment area, water depth, and lake area: catchment area ratio had comparatively little influence on DOM composition and biolability. These findings suggest that urban land use intensification in developing countries may lead to an increase in biolabile aliphatic DOM inputs from nonpoint sources and accelerated carbon cycling in lake ecosystems.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Oliver Gould, Natalia Drabinska, Norman Ratcliffe, Ben de Lacy Costello
Summary: Mass spectrometry (MS) is a versatile analytical technique that is widely used in various scientific fields. It provides new insights into proteomics and metabolomics. MS can detect volatile compounds in human samples for disease diagnosis, drug monitoring, and metabolic processes. Hyphenated MS techniques offer qualitative analysis with high accuracy and sensitivity, while real-time MS techniques provide highly sensitive quantitative data in a shorter time frame.
Article
Environmental Sciences
Veronica Granados, Rebeca Arias-Real, Cayetano Gutierrez-Canovas, Biel Obrador, Andrea Butturini
Summary: Water availability is a key factor driving biogeochemical processes in dynamic ecosystems such as intermittent rivers and ephemeral streams. However, the impact of the drying process on river biogeochemistry remains unclear. This study examined how drying conditions affect the concentration and composition of dissolved organic carbon (DOC) in streams. The results indicated that intensifying drying conditions were associated with higher DOC concentration and greater contribution of humic-like compounds, while protein-like compounds decreased.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Zhidan Wen, Yingxin Shang, Kaishan Song, Ge Liu, Junbin Hou, Lili Lyu, Hui Tao, Sijia Li, Chen He, Quan Shi, Ding He
Summary: The trophic state of lakes has a significant impact on the properties and concentration of dissolved organic matter (DOM). DOM in eutrophic lakes is more biologically refractory and contains compounds that are harmful to the environment. The molecular composition of DOM is positively correlated with the trophic state index. Additionally, the molecular lability of DOM varies with the season and phytoplankton community succession.
Article
Engineering, Environmental
Yongqiang Zhou, Lili Chen, Lei Zhou, Yunlin Zhang, Kai Peng, Zhijun Gong, Kyoung-Soon Jang, Robert G. M. Spencer, Erik Jeppesen, Justin D. Brookes, Dolly N. Kothawala, Fengchang Wu
Summary: The Eastern Route of the South-to-North Water Diversion Project aims to alleviate water shortage in arid regions of northern China by diverting a substantial amount of water. The project has significant implications for the hydrological connectivity and biogeochemical cycling of dissolved organic matter (DOM) in regional lakes.
Article
Engineering, Environmental
Zhenqing Shi, Qianting Ye, Yang Ding, Zecong Ding, Rong Li
Summary: Soil dissolved organic matter (DOM) is a complex mixture of organic compounds in soil solutions, which has a significant impact on various biogeochemical processes in the soil environment. However, the relationship between the chemical complexity of soil DOM molecules and their proton and metal binding abilities is still unclear, limiting our ability to predict the behavior of DOM and metals in the environment. In this study, we developed a modeling approach to quantify the proton and metal binding abilities of soil DOM, based on Cu titration experiments, Fourier transform ion cyclotron resonance mass spectrometry data, and molecular modeling methods. Despite the heterogeneity and diversity of soil DOM properties in samples from different regions, we were able to classify the molecules into three representative groups based on their Cu binding capacity. By developing molecular models for each group and considering their relative contributions in each soil DOM sample, we could predict the molecular properties and binding abilities of soil DOM as a whole. These findings will contribute to the development of mechanistic models for predicting the reactivity of soil DOM from different sources.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Prince Tiwari, Tiantian Wang, Julian Indlekofer, Imad El Haddad, Serge Biollaz, Andre Stephan Henry Prevot, Houssni Lamkaddam
Summary: This study presents an online, real-time measurement of trace contaminants in the cleaning stream of a biogas plant using Vocus proton-transfer-reaction mass spectrometer. More than 300 VOCs and 30 VOSCs were identified in the raw biogas, with dimethyl sulfide being the most dominant VOSC. The VOCUS-PTR-MS technology is shown to be a rapid and accurate tool for monitoring biogas facilities, providing valuable insights into biogas production.
Article
Engineering, Environmental
Morimaru Kida, Nobuhide Fujitake, Taichi Kojima, Yukiko Tanabe, Kentaro Hayashi, Sakae Kudoh, Thorsten Dittmar
Summary: Accelerated glacier melt and runoff contribute labile dissolved organic matter (DOM) into downstream ecosystems, where it undergoes substantial processing and transformation before entering the ocean. Molecular and optical techniques reveal that glacial DOM is primarily composed of small microbial-derived biomolecules, which are processed downstream into more complex molecules. Lakes along the flow path enhance water residence time and facilitate DOM processing and production.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Review
Chemistry, Analytical
Rui Su, Tongtong Yang, Xinrui Zhang, Na Li, Xingying Zhai, Huanwen Chen
Summary: Breath analysis is an attractive and non-invasive strategy for monitoring metabolic dynamics in living organisms. Mass spectrometry is a powerful analytical platform for breath analysis, and ambient mass spectrometry has been widely adopted due to its minimal/sample pretreatment requirements. This tutorial review introduces the principles, setup, procedures, applications, and future prospects of mass spectrometry-based techniques for breath analysis, aiming to facilitate further development and application in this field.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2023)
Review
Geosciences, Multidisciplinary
Chen He, Ding He, Chunmao Chen, Quan Shi
Summary: This paper summarizes the progress made in the molecular characterization of DOM using the FT-ICR MS technique, including sample pretreatment, mass spectrometry techniques, data processing, and more. The applications of FT-ICR MS in earth science, environmental science, and engineering are highlighted, with a discussion on future research directions.
SCIENCE CHINA-EARTH SCIENCES
(2022)
Article
Environmental Sciences
Peng Yao, Elena Chianese, Norbertas Kairys, Rupert Holzinger, Dusan Materic, Carmina Sirignano, Angelo Riccio, Haiyan Ni, Ru-Jin Huang, Ulrike Dusek
Summary: The chemical composition and stable carbon isotopic composition of organic aerosol particles emitted by a shuttle passenger ship in Italy were investigated. Methylsiloxanes and their derivatives were identified in the ship emissions for the first time, and their presence was supported by the low carbon isotopic values. These methylsiloxanes are likely to come from engine lubricants.
ENVIRONMENT INTERNATIONAL
(2022)
Article
Environmental Sciences
Marloes Groeneveld, Dolly N. Kothawala, Lars J. Tranvik
Summary: Streams and rivers play a crucial role in the global carbon cycle by transporting carbon from terrestrial ecosystems to the oceans. In agricultural areas, streams often experience increased concentrations of suspended mineral particles from soil erosion, leading to the adsorption of dissolved organic carbon (DOC) to particles and its retention in sediment. The extent of adsorption varies with the seasonal changes in the molecular composition of dissolved organic matter (DOM). This study conducted monthly sampling in a agriculturally impacted river in Sweden and found that the adsorption potential was highest when the riverine DOM had a terrestrial character. The adsorption extent was negatively related to base cation concentrations, particularly calcium.
Article
Engineering, Environmental
Yongqiang Zhou, Xiaoqin Yu, Lei Zhou, Yunlin Zhang, Hai Xu, Mengyuan Zhu, Guangwei Zhu, Kyoung-Soon Jang, Robert G. M. Spencer, Erik Jeppesen, Justin D. Brookes, Dolly N. Kothawala, Fengchang Wu
Summary: This study explores the impact of rainstorms on the flux, composition, and bio-lability of dissolved organic matter (DOM) in inflowing rivers of Lake Taihu. The researchers observed higher levels of DOC, BDOC, and SUVA(254) in the northwestern inflowing regions compared to other lake regions. Rainstorms were found to increase DOM absorbance, SUVA(254), and humification index, while decreasing spectral slope and protein-like compounds.
Article
Geosciences, Multidisciplinary
Yongqiang Zhou, Carolin Hiller, Sara Andersson, Elizabeth Jakobsson, Lei Zhou, Jeffery A. Hawkes, Dolly N. Kothawala, Lars J. Tranvik
Summary: Earth's lakes at northern latitudes are mostly ice-covered in winter. When lake water freezes, some organic matter dissolved in the water is excluded from the ice. The partitioning and composition of dissolved organic matter (DOM) in boreal lakes were investigated through field sampling and laboratory freeze-up experiments. It was found that a significant portion of dissolved organic carbon (DOC) was retained in the ice, while nitrogen, ions, and certain types of DOM were preferentially expelled to the unfrozen water column.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Engineering, Environmental
Yongqiang Zhou, Lili Chen, Lei Zhou, Yunlin Zhang, Kai Peng, Zhijun Gong, Kyoung-Soon Jang, Robert G. M. Spencer, Erik Jeppesen, Justin D. Brookes, Dolly N. Kothawala, Fengchang Wu
Summary: The Eastern Route of the South-to-North Water Diversion Project aims to alleviate water shortage in arid regions of northern China by diverting a substantial amount of water. The project has significant implications for the hydrological connectivity and biogeochemical cycling of dissolved organic matter (DOM) in regional lakes.
Correction
Engineering, Environmental
Martyn N. Futter, Thomas Dirnboeck, Martin Forsius, Jaana K. Back, Nathalie Cools, Eugenio Diaz-Pines, Jan Dick, Veronika Gaube, Lauren M. Gillespie, Lars Hogbom, Hjalmar Laudon, Michael Mirtl, Nikolaos Nikolaidis, Christian Poppe Teran, Ute Skiba, Harry Vereecken, Holger Villwock, James Weldon, Christoph Wohner, Syed Ashraful Alam
Article
Engineering, Environmental
Martyn N. Futter, Thomas Dirnboeck, Martin Forsius, Jaana K. Back, Nathalie Cools, Eugenio Diaz-Pines, Jan Dick, Veronika Gaube, Lauren M. Gillespie, Lars Hogbom, Hjalmar Laudon, Michael Mirtl, Nikolaos Nikolaidis, Christian Poppe Teran, Ute Skiba, Harry Vereecken, Holger Villock, James Weldon, Christoph Wohner, Syed Ashraful Alam
Summary: Integrated long-term, in-situ observations are crucial to document environmental change, ground-truth remote sensing and model outputs, and predict future Earth system behavior. Research infrastructures can support harmonized data collection, curation, and publication, and integrating these networks can provide insights into the terrestrial carbon sink.
Article
Engineering, Environmental
Peng Yao, Rupert Holzinger, Dusan Materic, Beatriz Sayuri Oyama, Maria de Fatima Andrade, Dipayan Paul, Haiyan Ni, Hanne Noto, Ru-Jin Huang, Ulrike Dusek
Summary: Methylsiloxanes, which are toxic to organisms, have been identified in aerosol samples collected in tunnels in Sao Paulo, Brazil, indicating the presence of these emerging pollutants in vehicle emissions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Ecology
David Ahlen, Mike Peacock, Yngve Brodin, Peter A. Hamback
Summary: Establishing wetlands for nutrient capture and biodiversity support can have trade-offs between environmental benefits and greenhouse gas emissions. This study investigates the relationships between nutrient capture, primary production, greenhouse gas production, and biodiversity support in wetlands. The findings reveal the importance of nutrient loads and water temperature in influencing chironomid emergence rates, community composition, and greenhouse gas production.
ECOLOGY AND EVOLUTION
(2023)
Article
Environmental Sciences
Mike Peacock, Scott J. Davidson, Dolly N. Kothawala, Joel Segersten, Martyn N. Futter
Summary: Lakes contribute to climatic warming by emitting methane, and there is a lack of data from large lakes. This study presents data from Lake Malaren, the third largest Swedish lake, showing spatial and seasonal variation in methane concentration. Methane levels were higher near nutrient sources and correlated with lake productivity and oxygen concentration. There is a negative relationship between lake surface area and methane concentration.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Article
Engineering, Civil
Februriyana Pirade, Kim Lompe, Javier Jimenez-Lamana, Sulalit Bandyopadhyay, Katharina Zuerbes, Nesrine Bali, Dusan Materic, Jan Willem Foppen
Summary: Nanoplastics in surface water can be accurately quantified using a gold-labelling method, but the presence of natural organic matter (NOM) in high concentration can hinder the quantification process. Further optimization is necessary for effectively applying this method in high NOM water samples.
AQUA-WATER INFRASTRUCTURE ECOSYSTEMS AND SOCIETY
(2023)
Article
Engineering, Environmental
Steve Allen, Dusan Materic, Deonie Allen, Anna MacDonald, Rupert Holzinger, Gael Le Roux, Vernon R. Phoenix
Summary: The existence of nano-sized plastic (NP) has been widely discussed in recent years, but there is limited physical evidence and direct comparison to microplastics. This study compared microplastic (MP) particles and counts (>10 μm) to nano-sized plastic particle (<0.45 μm) mass concentrations from atmospheric deposition in the French Pyrenees. The results showed that the quantity of nano-sized plastic may be similar to microplastics in this atmospheric deposition, but the particle count for nano-sized plastic is significantly higher. Backward trajectory modeling indicated the extended spatial influence and elevated levels of nano-sized plastic over a 7-day period.
JOURNAL OF HAZARDOUS MATERIALS ADVANCES
(2022)
Article
Environmental Sciences
Deonie Allen, Steve Allen, Sajjad Abbasi, Alex Baker, Melanie Bergmann, Janice Brahney, Tim Butler, Robert A. Duce, Sabine Eckhardt, Nikolaos Evangeliou, Tim Jickells, Maria Kanakidou, Peter Kershaw, Paolo Laj, Joseph Levermore, Daoji Li, Peter Liss, Kai Liu, Natalie Mahowald, Pere Masque, Dusan Materic, Andrew G. Mayes, Paul McGinnity, Iolanda Osvath, Kimberly A. Prather, Joseph M. Prospero, Laura E. Revell, Sylvia G. Sander, Won Joon Shim, Jonathan Slade, Ariel Stein, Oksana Tarasova, Stephanie Wright
Summary: The study analyzes the processes and fluxes of the marine-atmospheric micro(nano)plastic cycle and highlights the limited observations. A global observation strategy for marine-atmospheric micro(nano)plastics is proposed to address the uncertainties and knowledge gaps.
NATURE REVIEWS EARTH & ENVIRONMENT
(2022)