Article
Environmental Sciences
Mariel Gullian-Klanian, Gerardo Gold-Bouchot, Mariana Delgadillo-Diaz, Javier Aranda, Maria Jose Sanchez-Solis
Summary: Incorporating mineralizing Bacillus spp. in a recirculating aquaculture system was found to enhance mineralization processes, improve nutrient absorption, and positively influence nitrogen transformation. Various indicators, such as the composition of dissolved organic matter and the antioxidant activity of plant leaves, were used to assess the effects of bacterial supplementation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Marine
Timoci Koliyavu, Chloe Martias, Awnesh Singh, Stephane Mounier, Philippe Gerard, Cecile Dupouy
Summary: Heavy rain events were found to impact the biogeochemical outflows and ecosystem health in the coastal waters of small Pacific Islands. Analysis revealed higher values of most components (along with most tested variables) at the southwest coast during the wet season, consistent with surface currents outflow. Additionally, the positive correlation of dissolved organic carbon (DOC) with nutrients suggests the utilization of DOM as an energy source.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2021)
Article
Environmental Sciences
Wan-E Zhuang, Wei Chen, Liyang Yang
Summary: Chromophoric dissolved organic matter (CDOM) plays important roles in aquatic environments, providing optical indices to evaluate the source and composition of dissolved organic matter (DOM). This study investigated the varying photodegradation of CDOM from different sources and its effects on optical indices. The results showed that CDOM from different sources exhibited different photodegradation properties and changes in optical indices.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Ying Zhao
Summary: Dissolved organic nitrogen (DON) plays a crucial role in the global nitrogen and carbon cycles. This study assessed the dynamics of DON in inland water bodies in the semiarid Songnen Plain of Northeast China. The results showed significant differences in DON concentrations and CDOM characteristics between fresh water and brackish water bodies. DON concentrations were moderately correlated with water quality parameters and CDOM fluorescent components. CDOM component C1 was identified as the best optical predictor for nutrients in the water bodies.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Oceanography
C. DeFrancesco, C. Gueguen, W. J. Williams, S. Zimmermann
Summary: The interannual variability of fluorescent dissolved organic matter (FDOM) in the Pacific- and Atlantic-derived halocline and Atlantic waters of the Canada Basin was studied. A seven-component model was validated using fluorescence spectroscopy excitation-emission matrices and parallel factor analysis. Over the 11-year period, humic-like intensities increased, particularly in shallower waters, while no significant trends were observed for protein-like intensities. The changes in humic-like fluorescence intensities may be attributed to alterations in Bering Strait inflow and freshwater accumulation in the Beaufort gyre.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Engineering, Civil
Lu Yan, Xianjun Xie, Kang Peng, Ningdi Wang, Yuyao Zhang, Yamin Deng, Yiqun Gan, Qinghua Li, Yanpeng Zhang
Summary: Chromophoric dissolved organic matter (CDOM) is a key optically active component in estuarine DOM, influencing nutrient and micronutrient biogeochemical processes. Sources of CDOM in tropical mangrove estuaries include terrestrial/anthropogenic inputs, riverine runoff, and mangrove porewater exchange. Understanding CDOM composition and sources is crucial for biogeochemical cycling in mangrove estuaries.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
L. O. Vidal, T. Lambert, L. C. Cotovicz Jr, M. C. Bernardes, R. Sobrinho, F. Thompson, G. D. Garcia, B. A. Knoppers, P. Gatts, C. R. Regis, G. Abril, C. E. Rezende
Summary: This study investigated the sources and transformations of dissolved organic matter (DOM) in the Paraiba do Sul River and mangrove waters, and found that river discharge and salinity gradient affect the composition and contribution of DOM. Tidal fluctuations were also found to impact carbon input and DOM composition in the mangrove creek.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Weixiang Ren, Xiaodong Wu, Bingfa Chen, Jianying Chao, Xuguang Ge, Jiuyun Yang, Hui Yang
Summary: Chromophoric dissolved organic matter (CDOM) is a key component that affects the ecological functioning of lakes. The optical characteristics of CDOM in the upstream and downstream lakes of the Taihu Lake Basin were systematically studied, revealing differences in CDOM composition. Soil or surface erosion was identified as the main factor contributing to higher abundance of C1 in the upstream lakes, while increased biological activities accounted for higher abundance of C3 in the downstream lakes. Rainfall erosion during the wet season led to an increase in CDOM. Photodegradation and flocculation degree played a significant role in reducing CDOM, with downstream lakes exhibiting higher levels. Optical analysis of CDOM provides a promising method for monitoring water quality in lakes.
CHINESE GEOGRAPHICAL SCIENCE
(2022)
Article
Environmental Sciences
Gerardo Gold-Bouchot, Samuel Polis, Lauren Elizabeth Castanon, Mayra Padilla Flores, Alyssa Nicole Alsante, Daniel Conrad Ogilvie Thornton
Summary: The study examined the impact of extreme freshwater discharge on CDOM properties in Galveston Bay during Hurricane Harvey. Results showed distinct changes in CDOM properties during dry season, wet season, and Hurricane Harvey, with different components displaying varied correlations with salinity, dissolved oxygen, and chlorophyll a, demonstrating the importance of CDOM in the bay's ecosystem dynamics.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Juliana M. Huizenga, Lewis Semprini
Summary: Polycyclic aromatic hydrocarbons (PAHs) are environmental contaminants associated with carcinogenic, mutagenic, and teratogenic health effects. Analyzing PAHs and their transformation products often requires extensive sample preparation and analytical techniques. Excitation-emission matrix (EEM) fluorescent spectroscopy with parallel factor analysis (PAR-AFAC) is a method that eliminates the need for extensive sample preparation and separation techniques. This study demonstrates the use of EEM-PARAFAC to monitor phenanthrene degradation and formation of metabolites.
Article
Engineering, Environmental
Marc Philibert, Simin Luo, Lavel Moussanas, Qingqing Yuan, Emmanuelle Filloux, Flavia Zraick, Kathleen R. Murphy
Summary: This study analyzed the fluorescence composition of surface waters and predicted aromaticity and treatability using samples from different regions and water treatment plants. Nine fluorescence components were identified and ratios between these components were found to predict chemical properties and water treatment efficacy. These findings have important implications for water treatment applications.
Article
Environmental Sciences
Gholamreza Mohammadpour, Saied Pirasteh
Summary: The study parametrized SPM concentration in the Persian Gulf and Oman Sea coastal waters using MODIS-derived Rrs values, with the optical model being sensitive to CDOM concentration and showing significant correlation with in situ measurements. This increased the average accuracy of estimates up to 73%.
MARINE POLLUTION BULLETIN
(2021)
Article
Environmental Sciences
A. A. Russo, D. F. Boutt, L. A. Munk, J. Jenckes
Summary: High latitude mountain environments are being severely affected by climate change, and the Gulf of Alaska region is a prime example, especially in terms of changing hydrologic balance. However, the magnitude and contribution of fresh submarine groundwater discharge (fresh SGD) in the region have not been explored extensively, despite its global attention for its chemical significance and influence on coastal ecosystems. In this study, the first regional estimates of fresh SGD for the Gulf of Alaska are provided, using two established water balance approaches. These estimates help distinguish the contribution of land-derived fresh SGD, as opposed to the commonly measured total SGD driven by marine forces. The results show high spatial and temporal variability of fresh SGD throughout the region, with significant contributions to the total freshwater discharge.
WATER RESOURCES RESEARCH
(2023)
Article
Spectroscopy
Elli Pitta, Christina Zeri
Summary: This study examined the impact of co-analyzing datasets from different natural water sources in the Eastern Mediterranean Sea on PARAFAC analysis, finding both positive and negative effects. The reliability of components and similarity of common identified components were evaluated through residual analysis and correlation assessment. The study concluded that the resolution of extra components in combined analysis can have varying effects on model fit and should be carefully assessed.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Oceanography
Colin A. Stedmon, Rainer M. W. Amon, Dorothea Bauch, Astrid Bracher, Rafael Goncalves-Araujo, Mario Hoppmann, Richard Krishfield, Samuel Laney, Benjamin Rabe, Heather Reader, Mats A. Granskog
Summary: This study highlights the potential of dissolved organic matter (DOM) as a tracer in the Arctic Ocean, particularly in the halocline layer. By measuring the fluorescence levels of DOM, distinct contributions from different sources can be distinguished and help evaluate ocean circulation patterns.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Biochemical Research Methods
Vaughn Mangal, Naomi L. Stock, Celine Gueguen
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2016)
Review
Chemistry, Analytical
C. W. Cuss, C. Gueguen
ANALYTICAL METHODS
(2016)
Article
Biotechnology & Applied Microbiology
Cameron Winters, Celine Gueguen, Adam Noble
JOURNAL OF APPLIED PHYCOLOGY
(2017)
Article
Chemistry, Analytical
Weibin Chen, Celine Gueguen, D. Scott Smith
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2017)
Article
Environmental Sciences
Yong Xiang Shi, Celine Gueguen
WATER AIR AND SOIL POLLUTION
(2017)
Article
Engineering, Environmental
Weibin Chen, Celine Gueguen, D. Scott Smith, Josep Galceran, Jaume Puy, Encarnacio Companys
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2018)
Article
Environmental Sciences
Deli Wang, Shuimiao Lu, Nengwang Chen, Minhan Dai, Celine Gueguen
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2018)
Article
Environmental Sciences
Alan Lock, Dirk Wallschlager, Nelson Belzile, Graeme Spiers, Celine Gueguen
JOURNAL OF ENVIRONMENTAL SCIENCES
(2018)
Article
Chemistry, Multidisciplinary
Zhiyuan Gao, Celine Gueguen
Article
Engineering, Environmental
Vaughn Mangal, Benjamin R. Stenzler, Alexandre J. Poulain, Celine Gueguen
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Oceanography
P. G. Dainard, C. Gueguen, M. Yamamoto-Kawai, W. J. Williams, J. K. Hutchings
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2019)
Article
Environmental Sciences
Vaughn Mangal, Ta Phung, Thien Q. Nguyen, Celine Gueguen
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2019)
Article
Biology
David Colatriano, Patricia Q. Tran, Celine Gueguen, William J. Williams, Connie Lovejoy, David A. Walsh
COMMUNICATIONS BIOLOGY
(2018)
Article
Environmental Sciences
V. Mangal, Y. X. Shi, C. Gueguen
Article
Oceanography
Zhiyuan Gao, Celine Gueguen
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
(2017)
Article
Chemistry, Multidisciplinary
Morgane Leon, Pieter van Beek, Virginie Sanial, Marc Souhaut, Paul Henderson, Matthew A. Charette
Summary: The analysis of radium and actinium isotopes in seawater requires the collection of large volumes of water and the use of high sensitivity instruments. To concentrate these isotopes, filters impregnated with MnO2 are typically used. However, the extraction efficiency of these filters for the target isotopes needs to be determined.