Article
Agronomy
Yumei Peng, Huasen Xu, Zi Wang, Jia Shi, Junfei Lv, Xiang Wang
Summary: This study investigates the changes in the quantity and quality of dissolved organic matter (DOM) in intercropping soil under drought conditions. It finds that intercropping can provide more bioavailable resources and soil carbon inputs, but further data is needed to understand its response to drought.
Article
Green & Sustainable Science & Technology
Jiachen Luo, Siyue Li
Summary: Seasonality has a significant impact on the characteristics of dissolved organic matter, with different sources in different seasons. The quality indices of dissolved organic matter show significant relationships with the partial pressure of carbon dioxide, helping to understand the origins and control mechanisms of carbon dioxide.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Ling Wen, Fang Yang, Xuan Li, Siwan Liu, Yuye Lin, En Hu, Li Gao, Ming Li
Summary: Wastewater treatment plants have a critical role in removing dissolved organic matter (DOM) from aquatic systems. However, there is limited understanding of the composition and fate of DOM in different WWTPs with various environmental and socioeconomic conditions. This study analyzed DOM components in Chinese WWTPs using advanced analytical methods and found that the removal efficiency of DOM was closely related to its composition. The study also identified significant correlations between geographic location, GDP, and DOM components in the influent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Forestry
Shinji Kaneko, Hitomi Furusawa, Toru Okamoto, Yasuhiro Hirano
Summary: We investigated the changes in dissolved organic matter (DOM) from rain to stream water in a forested watershed. DOM supply from tree tissue and O layer caused an increase in dissolved organic carbon (DOC) concentration and specific UV absorbance at 254 nm (SUVA(254)) in rainwater. The decrease in DOC concentration and SUVA(254) with soil depth was not observed in the soil-percolating water. DOC concentration was low in both seepage and stream waters, with a seasonal variation observed in the stream water. The correlation between DOC concentration and absorbance at 254 nm (UV254) was significant, with different ratios observed among different sample types.
Article
Environmental Sciences
Tahir Maqbool, Daqian Jiang
Summary: This study investigated the fate of dissolved organic matter (DOM) in the sediment during electrokinetic remediation (EKR) using multiple spectroscopic tools. The results showed significant electromigration of alkaline-extractable DOM toward the anode, followed by transformation of aromatics and mineralization of polysaccharides. The water-extractable organic matter increased at both electrodes, likely due to pH-driven dissociations. Nitrogen migrated with the alkaline-extractable DOM, but phosphorus remained immobilized. Understanding the redistribution and transformation of DOM in EKR is important for studying contaminant degradation, carbon and nutrient availability, and sediment structural changes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Dongxu Zhang, Xiaoyu Chen, Guangjun Fu, Zhou Yang, Jia Song, Xiaogang Tong
Summary: The chemistry of dissolved organic matter (DOM) in soil plays a crucial role in soil nutrient cycling and vegetation restoration. This study found that as the vegetation restoration progressed, the concentration of DOM increased in the soil. The composition and properties of DOM were influenced by dissolved organic carbon in arbor forest, while dissolved organic nitrogen mainly affected DOM in shrubland.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Angela Hansen, Tamara Kraus, Matthew Landon, Peter Mcmahon
Summary: This study analyzed dissolved organic carbon concentration and optical spectroscopic techniques (absorbance and fluorescence) of oil-field water and groundwater samples in southern California. The results showed significantly higher DOC concentrations in oil-field water compared to native groundwater samples. Multivariate statistical analysis identified 10 optical properties that were significant in distinguishing water categories. Principal component analysis demonstrated the ability to successfully differentiate oil-field water samples from native groundwater mixed with oil-field water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yucong Zheng, Ting Cao, Yadai Zhang, Jiaqing Xiong, Mawuli Dzakpasu, Dan Yang, Qian Yang, Ying Liu, Qian Li, Shuaishuai Liu, Xiaochang Wang
Summary: The study demonstrates that alkaline treatment and alkaline-heated treatment significantly enhance the denitrification promotion capacity of plant carbon sources, prolong the duration of high denitrification rate, and increase nitrogen removal rates in constructed wetlands. The main components of dissolved organic matter released from the treated carbon sources are humic acid-like, tyrosine-like, and tryptophan-like, which are highly bioavailable.
Article
Environmental Sciences
Leilei Luan, Liangmin Gao, Xudong Chen, Juan Ge, Ming Mu, Xiaoqing Chen, Xinglan Zhao, Zhen Zhang, Haiqiang Zhang
Summary: This study examined the relationship between DOM components and rotifer communities in natural rivers. The results showed significant differences in the composition and diversity of rotifer communities among different areas, which might be related to the types of DOM and geographical distances. Rotifer communities were found to be closely related to the parameters of DOM components.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Shelby Buckley, Frank Leresche, Blair Hanson, Fernando L. Rosario-Ortiz
Summary: The complex effects of ozonation on the photo-physical and size-based properties of dissolved organic matter (DOM) were investigated using two DOM isolates, Suwannee River Fulvic Acid (SRFA) and Pony Lake Fulvic Acid (PLFA). The results showed that ozonation affected the fluorescence quantum yield differently in low and high apparent molecular weight (AMW) fractions. It also increased the singlet oxygen quantum yield in the low AMW fractions, indicating these fractions are the most photoreactive. The study further suggested that the photoactive and fluorescent fractions of DOM are likely independent pools of chromophores from different AMW fractions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Federico Baltar, Xose A. Alvarez-Salgado, Javier Aristegui, Ronald Benner, Dennis A. Hansell, Gerhard J. Herndl, Christian Lonborg
Summary: The text discusses the transformation and sequestration of organic carbon produced in the sunlit surface ocean into the ocean's interior, focusing on the refractory dissolved organic carbon (rDOC). It emphasizes the importance of defining rDOC operationally and highlights the various factors influencing its persistence, including intrinsic and extrinsic properties. The text also suggests specific research questions aimed at stimulating further research on the nature, dynamics, and role of rDOC in carbon sequestration under future scenarios of climate change.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Engineering, Environmental
Yun Kyung Lee, Ha-Young Yoo, Kyung-Seok Ko, Wei He, Tanju Karanfil, Jin Hur
Summary: This study tracks the spectroscopic signatures of MPs in sandy subsurface systems and explores their potential to form disinfection byproducts (DBPs). The addition of MPs increases the amount of dissolved organic matter (DOM) during infiltration, with UV-irradiated MPs having a more pronounced effect. Two fluorescent components, C1 and C2, are identified, with C1 being more predominant. Environmental interferences such as biodegradation and mineral adsorption do not fully explain the spectroscopic signatures of MP-DOM in the infiltration process.
Article
Green & Sustainable Science & Technology
Gang Tang, Xiaolin Li, Zi Wang, Kai Wang, Binrui Li, Chongxuan Liu, Xing Zheng
Summary: The study investigated the dynamics of DOM and SMP in A(2)O units using fluorescence analysis, revealing the influence of temperature and influent quality on treatment efficiency and DOM quality. Strategies considering seasonal dynamics of DOM/SMP were recommended for strict effluent regulation and sustainability of water bodies. The fluorescence-derived information showed potential in indicating quantified DOM properties.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Applied
S. Samreen, Deepak Devadiga, B. M. Samrudhi, T. N. Ahipa, Kishor Kumar Sadasivuni
Summary: In this study, four new cyanopyridone derivatives with terminal long chain alkyloxy substituents were designed and synthesized. The synthesized compounds were characterized by IR, NMR, and Mass spectrometry, and their optical properties were examined in solution state. The compounds exhibited blue emissive behavior in solution state and yellow fluorescence in solid state. Moreover, one of the compounds showed intriguing fluorescence properties under applied mechanochromic stimuli. A simple grinding-fuming process confirmed the morphological changes and enhanced the emission property of the studied compound.
Article
Engineering, Environmental
Mohamed M. Aremou Daouda, S. Peace Hounkpe, M. Belfrid Djihouessi, A. V. Onesime Akowanou, Martin Pepin Aina, Patrick Drogui
Summary: This study aims to fill the data gap analysis in urban wastewaters characteristics in Benin and its statistical analysis. Physicochemical parameters were determined in domestic and industrial wastewater in Cotonou city, showing significant differences in the physico-chemistry of the effluents. Pharmaceutical wastewater had the highest concentration of organic pollution, while Abs.UV254 was found to be a key parameter for treatment of greywater and industrial wastewater.
WATER SCIENCE AND TECHNOLOGY
(2021)