Article
Engineering, Chemical
Lingfei Ma, Fangyuan Peng, Yi Lu, Zhaoguang Yang, Bo Qiu, Haipu Li
Summary: This study investigated the effects of coagulation treatment on Microcystic aeruginosa AOM and the DBPs produced from it using multiple analysis methods, finding that aluminum salt coagulant can remove some AOM components but has limited precipitation ability, and the formation of DBPs is correlated with spectral parameters.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Jeonghyun Kim, Yeseul Kim, Sung Eun Park, Tae-Hoon Kim, Bong-Guk Kim, Dong-Jin Kang, TaeKeun Rho
Summary: This study analyzed DOM near coastal aquafarms in Jeju Island and found that aquafarms are significant sources of DOM, with TDN mainly generated by aquaculture activities and DOC mainly enriched by natural biological activities in coastal waters.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Analytical
Francisco J. Rodriguez-Vidal, Maria Garcia-Valverde, Beatriz Ortega-Azabache, Angela Gonzalez-Martinez, Ana Bellido-Fernandez, Victorino Diez-Blanco, M. Olga Ruiz-Perez
Summary: This study assessed the usefulness of excitation-emission matrix fluorescence (EEMF) as a fast and simple analytical technique to track changes in dissolved organic matter (DOM) during wastewater treatment. The results showed that EEMF can successfully monitor the removal percentages of organic matter and assess the reactivity of different types of organic matter towards specific treatments.
MICROCHEMICAL JOURNAL
(2022)
Article
Engineering, Environmental
Hongfei Liu, Hongwei Xu, Yang Wu, Zemin Ai, Jiaoyang Zhang, Guobin Liu, Sha Xue
Summary: The biodegradation of dissolved organic matter (DOM) is influenced by natural vegetation restoration, with both promotion and inhibition effects observed. Higher temperature enhances the rate of DOM biodegradation. The biodegradability and temperature sensitivity of DOM are regulated by DOM substrate quality and microbial properties.
Article
Spectroscopy
Francisco J. Rodriguez-Vidal, Maria Garcia-Valverde, Beatriz Ortega-Azabache, Angela Gonzalez-Martinez, Ana Bellido-Fernandez
Summary: This study assessed the performance of water treatment plants in removing dissolved organic matter (DOM), revealing different removal rates for different fluorescence peaks at a WWTP in Burgos, Spain. Coagulation-flocculation effectively removed the entire fluorescent DOM in the Uzquiza reservoir, but residual protein-like SMPs were observed in the final stage.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Engineering, Civil
Yongmei Ma, Rong Mao, Siyue Li
Summary: The study investigated the variations of dissolved organic matter (DOM) compositions and sources in monsoonal rivers of China. It found that DOM in the wet season showed higher humification, aromaticity, and lignin substances, while the dry season had more biological and autochthonous sources. The research highlighted that hydrological seasonality and anthropogenic activities were key drivers for DOM variations, which will improve understanding of DOM's role in biogeochemical cycles and guide water quality protection in monsoonal rivers.
JOURNAL OF HYDROLOGY
(2021)
Article
Environmental Sciences
Tahir Maqbool, Chengyue Li, Yanling Qin, Jiaxing Zhang, Muhammad Bilal Asif, Zhenghua Zhang
Summary: This study reveals the seasonal and location-dependent dynamics of dissolved organic matter (DOM) in tap water and source water of a metropolitan city. Significant changes in fluorescent DOM (FDOM) composition were observed between wet and dry seasons. Optimizing operational conditions of drinking water treatment plants is crucial after considering seasonal changes and source water characteristics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Bo Gong, Wei Chen, Xian-Wei Liu, Chen Qian
Summary: In this study, a new fluorescence approach based on excitation emission matrix (EEM), combined with a new algorithm called matrix reconstruction coupled with prior linear decomposition (MR-PLD), was developed to simultaneously quantify multiple dissolved organic matter (DOM) components. The method was validated using simulated water samples and showed higher accuracy and convenience compared to other methods. The anti-interference performance of MR-PLD was also tested using both simulated and experimental methods. Real water samples from natural waters and wastewater treatment plants were analyzed to confirm the method's robustness. This study provides a new approach for characterizing DOM and exploring its environmental impacts.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Juwon Lee, Sook-Hyun Nam, Jae-Wuk Koo, Yonghyun Shin, Eunju Kim, Tae-Mun Hwang
Summary: This study used fluorescence excitation-emission matrix spectroscopy-parallel factor analysis (FEEM-PARAFAC) to estimate the chlorine decay constant (k) in urban water distribution systems. The influence of seasonal variations on chlorine consumption and dissolved organic matter (DOM) composition was investigated in three water distribution systems. The study found that the decay constants differed by season and were significantly affected by temperature, and the highest value was observed in summer. The study also derived model equations linking the organic components and chlorine decay constants.
Article
Engineering, Environmental
Saier Wang, Hanbang Wang, Huiming Xiang, Ying Shi, Lianghu Su, Tao Zhou, Longjiang Zhang
Summary: This study investigates the use of UV365 irradiation to activate sodium persulfate for rapid hydrolyzation and humification of food waste slurry. The results show that the hydrolysis yield reaches a maximum value following UV365/4% PS application. Fluorescence excitation-emission matrix spectroscopy analysis indicates the decomposition of FW fluorescent molecules into humus-like and tryptophan-like substances. This study provides valuable insights for FW management.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Anh Tien Dang, Thi Huyen Duong, Ji-won Park, Sang-Yeob Kim, Jae Woo Lee, Sung Kyu Maeng
Summary: The occurrence of harmful algal blooms (HABs) in drinking water reservoirs causes problems for water treatment and supply. Ultrasonication, a physicochemical treatment method, is used to treat HABs. This study investigated the changes in algal organic matter (AOM) during ultrasonication using fluorescence excitation-emission matrix and assimilable organic carbon. It was found that ultrasonication increased the dissolved AOM content, particularly the dissolved organic carbon released from intracellular organic matter (IOM) of algal cells.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Microbiology
Bethany G. Fox, Robin M. S. Thorn, Darren M. Reynolds
Summary: This study investigates the origin and range of fluorescent organic matter (FOM) produced by environmentally sourced freshwater bacteria, challenging the binary classification of FOM as either autochthonous or allochthonous. The study demonstrates that FOM processing and production occur along a dynamic continuum, with both in-situ production by microbial processes and transportation into aquatic systems from external sources. Additionally, fluorescence intensity data for environmental bacteria isolate monocultures are presented for the first time, allowing for the assessment of the relative contribution of different bacteria to the autochthonous FOM pool.
Article
Environmental Sciences
Wei Li, Chun Ding, Gregory Korshin, Jiping Li, Hu Cheng
Summary: This study investigated the effects of chlorination on the characteristics of EfOM and its impact on the phototransformation of sulfamethoxazole (SMX). The results showed that chlorination selectively removed aromatic protein-like substances in EfOM and led to the formation of low molecular aliphatic organic matter. Both unaltered and chlorinated EfOM promoted the photodegradation of SMX, but the rate of SMX degradation decreased at higher chlorination concentrations. This study provides new insights into the photochemical properties of chlorinated EfOM in aquatic environments and its role in the degradation of antibiotics and other trace-level pharmaceuticals.
Article
Environmental Sciences
Qingcai Chen, Xiaoyu Hua, Ainur Dyussenova
Summary: This study investigates the effects of oxidation and photochemical reactions on atmospheric chromophores, finding that these reactions drive the oxidation state evolution of the chromophores. The research also identifies the production of secondary chromophores from highly-oxygenated HULIS, suggesting a degradation product of less-oxygenated HULIS. Furthermore, the study suggests that atmospheric oxidation processes are the main driving reaction for the transformation of atmospheric chromophores.
Article
Geosciences, Multidisciplinary
Nahin Mostofa Niloy, Mashura Shammi, Md Morshedul Haque, Shafi M. Tareq
Summary: This study characterized the dissolved organic matter (DOM) in the downstream reaches of the Ganges and Brahmaputra rivers in Bangladesh. It found that the water quality of both rivers was unsuitable for drinking due to decreased dissolved oxygen concentration and high levels of total coliform. The study identified different DOM components using fluorescence spectroscopy and found that protein-like components were the most abundant in both rivers. The study also revealed that sewage water was the largest contributor to DOM, indicating excessive anthropogenic activities in the river basins of Bangladesh.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Environmental Sciences
Julia Zakharova, Hamid Pouran, John Bridgeman, Andrew Wheatley, Mohammed Arif
Summary: This study examines the presence and behavior of iron, copper, and zinc in highway runoff and compares it with other urban sources of metals. The findings show that the concentration and solubility of metals do not immediately change, emphasizing the importance of pre- and post-storm conditions. Additionally, the study highlights the influence of storm characteristics on metal concentrations in highway runoff and the effects of de-icer application on zinc availability during winter road maintenance.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Chemistry, Physical
Karin Ching, Andy Baker, Ryoji Tanaka, Tingwen Zhao, Zhen Su, Rodney S. Ruoff, Chuan Zhao, Xianjue Chen
Summary: Pressure-driven liquid-phase isotope separation using graphene oxide and UV-reduced graphene oxide membranes can enrich D and O-18 in natural water. Adsorption separation was found to be the dominant mechanism, with increased graphene oxide loading leading to improved enrichment of D and O-18. UV-rG-O membranes showed the best performance in enriching D and O-18 in a single-stage experiment.
Article
Environmental Sciences
Zoe A. Thomas, Scott Mooney, Haidee Cadd, Andy Baker, Chris Turney, Larissa Schneider, Alan Hogg, Simon Haberle, Ken Green, Laura S. Weyrich, Vilma Perez, Nicole E. Moore, Atun Zawadzki, Sarah J. Kelloway, Stuart J. Khan
Summary: The study reveals a warming trend in the Australian alpine region over the past 3500 years, with a pronounced climate anomaly between 1000 and 1600 cal yrs. BP. Vegetation shifts occurred during this warm period, characterized by a decline in alpine species and an increase in open woodland taxa, along with an increase in regional fire activity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Computer Science, Interdisciplinary Applications
Fabio Oriani, Pauline C. Treble, Andy Baker, Gregoire Mariethoz
Summary: This study presents a novel image analysis approach, WlCount, for detecting and counting laminae in geoscientific imagery. The method combines Dynamic Time Warping and Wavelet analysis techniques, and enables automatic counting through user-extracted signal frequencies. Experimental results demonstrate that WlCount provides comparable detection and counting results to manual counting.
COMPUTERS & GEOSCIENCES
(2022)
Article
Geochemistry & Geophysics
Liza K. McDonough, Pauline C. Treble, Andy Baker, Andrea Borsato, Silvia Frisia, Gurinder Nagra, Katie Coleborn, Michael K. Gagan, Jian-xin Zhao, David Paterson
Summary: This study compares fire-sensitive geochemical signals in a stalagmite from Yonderup Cave, Western Australia, with documented wildfire events. The results reveal distinct peaks in phosphorus and metal concentrations in response to known fire events, suggesting the presence of ash. The findings also indicate variations in geochemical signals before and after European colonization, likely linked to changes in land management, fire frequency, and fire intensity.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Correction
Environmental Sciences
Zoe A. Thomas, Scott Mooney, Haidee Cadd, Andy Baker, Chris Turney, Larissa Schneider, Alan Hogg, Simon Haberle, Ken Green, Laura S. Weyrich, Vilma Perez, Nicole E. Moore, Atun Zawadzki, Sarah J. Kelloway, Stuart J. Khan
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Spectroscopy
Huixin Wang, Pauline Treble, Andy Baker, Anne M. Rich, Saroj Bhattacharyya, Fabio Oriani, Rabeya Akter, Khorshed Chinu, Irene Wainwright, Christopher E. Marjo
Summary: The variation of sulphur in stalagmites can be used to infer past volcanic activities, anthropogenic pollution, and climate change. Synchrotron radiation micro X-Ray fluorescence (SR-XRF) microprobe and benchtop micro-XRF are effective tools for analysing and imaging sulphur in stalagmites with high resolution.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2022)
Article
Multidisciplinary Sciences
Liza K. McDonough, Martin S. Andersen, Megan Behnke, Helen Rutlidge, Phetdala Oudone, Karina Meredith, Denis M. O'Carroll, Isaac R. Santos, Christopher E. Marjo, Robert G. M. Spencer, Amy M. McKenna, Andy Baker
Summary: Groundwater contains a diverse mix of dissolved organic matter (DOM) molecules, which undergo different degradation pathways compared to those in marine, river, and lake systems. The degradation of groundwater DOM has significant implications for the global carbon cycle.
NATURE COMMUNICATIONS
(2022)
Article
Geography, Physical
Asfawossen Asrat, Andy Baker, Wuhui Duan, Melanie J. Leng, Ian Boomer, Rabeya Akter, Gregoire Mariethoz, Lewis Adler, Catherine N. Jex, Meklit Yadeta, Lisheng Wang
Summary: This study presents a paleoenvironmental record of the Early Holocene in Ethiopia using multiple proxies including oxygen and carbon isotopes, growth rate, and trace elements in stalagmites. The analysis revealed significant spectral frequencies in delta C-13 and delta O-18, indicating multidecadal variability in stalagmite records. The variability is likely caused by nonequilibrium deposition and hydroclimate forcing, which affect the isotopic composition of percolation water during stalagmite formation.
QUATERNARY RESEARCH
(2022)
Article
Geography, Physical
Carol V. Tadros, Monika Markowska, Pauline C. Treble, Andy Baker, Silvia Frisia, Lewis Adler, Russell N. Drysdale
Summary: This paper presents high-resolution oxygen isotope time series of three stalagmite records from the alpine region of south-eastern Australia, and investigates the controls on speleothem 318O and the coherence between the records. The study finds that the stalagmites show common responses to higher recharge periods and low recharge periods, but the magnitude of the response varies among the records, which is attributed to variability in preferential flows and reservoir volume during recharge events.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Engineering, Environmental
Magdalena Bieroza, Suman Acharya, Jakob Benisch, Rebecca N. ter Borg, Lukas Hallberg, Camilla Negri, Abagael Pruitt, Matthias Pucher, Felipe Saavedra, Kasia Staniszewska, Sofie G. M. van't Veen, Anna Vincent, Carolin Winter, Nandita B. Basu, Helen P. Jarvie, James W. Kirchner
Summary: High-frequency water quality measurements in streams and rivers have greatly improved in the past two decades. This technology allows for automated and detailed chemical analysis of water quality constituents, providing insights into sources, transport pathways, and transformation processes of solutes and particulates. The development of high-frequency water quality measurements has also advanced scientific understanding and management of freshwater systems.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Geochemistry & Geophysics
Micheline Campbell, Liza McDonough, Pauline C. Treble, Andy Baker, Nevena Kosarac, Katie Coleborn, Peter M. Wynn, Axel K. Schmitt
Summary: Wildfires impact 40% of the earth's terrestrial biome, but our understanding of past fire activity is limited. Speleothems have recently been shown to record past fire events and can extend our knowledge of fire history. This review provides an overview of fire regimes, paleofire proxies, and the physical basis of speleothem fire records, as well as case studies from Australia.
REVIEWS OF GEOPHYSICS
(2023)
Article
Environmental Sciences
Stacey C. Priestley, Pauline C. Treble, Alan D. Griffiths, Andy Baker, Nerilie J. Abram, Karina T. Meredith
Summary: Billions of people worldwide rely on groundwater, but the impacts of climate change on groundwater recharge are not well understood. A study in southwest Australia found that a sustained decrease in rainfall has led to a disconnect between shallow karst aquifers and rainfall recharge, implying that groundwater recharge may no longer be reliable in this region. This situation is unprecedented in the last 800 years.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Geology
Miaofa Li, Binggui Cai, Slobodan B. Markovic, Luo Wang, Qingzhen Hao, Andy Baker, Milivoj B. Gavrilov, Liyuan Jiang, Fang Wang, Xuefeng Wang, Lisheng Wang, Zhibang Ma, Jule Xiao, Zhengtang Guo
Summary: The North Atlantic jet stream has a significant impact on the climate of the North Atlantic-European region, particularly in winter. Recent observations have shown that the winter jet stream has strengthened over the past 140 years, and this trend has deviated from natural variability. Researchers have discovered that the appearance of the North Atlantic warming hole, caused by anthropogenic forcing, is the most likely explanation for this anomalous trend. Continued global warming may further strengthen the jet stream in the future.
Article
Environmental Sciences
Pauline C. Treble, Andy Baker, Nerilie J. Abram, John C. Hellstrom, Jagoda Crawford, Michael K. Gagan, Andrea Borsato, Alan D. Griffiths, Petra Bajo, Monika Markowska, Stacey C. Priestley, Stuart Hankin, David Paterson
Summary: Karst hydrology has a significant impact on the oxygen isotopic compositions of cave speleothems, and global analysis suggests that inconsistencies in speleothem-based reconstructions of past hydroclimates are common worldwide. The influence of fractures on flowpaths is identified as the primary driver of within-cave speleothem and dripwater oxygen isotopic variability.
COMMUNICATIONS EARTH & ENVIRONMENT
(2022)
