Environmental science. Advances最新文献

{"title":"The effects of lead, copper, and iron corrosion products on antibiotic resistant bacteria and antibiotic resistance genes†","authors":"Veronika Folvarska, San Marie Thomson, Zihao Lu, Maya Adelgren, Adam Schmidt, Ryan J. Newton, Yin Wang and Patrick J. McNamara","doi":"10.1039/D4VA00026A","DOIUrl":"10.1039/D4VA00026A","url":null,"abstract":"<p >Antibiotic resistance is a public health crisis. Antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) are present in drinking water distribution systems. Metals are known selective pressures for antibiotic resistance, and metallic corrosion products are found within drinking water distribution systems due to the corrosion of metal pipes. While corrosion products are a source of metals, the impact of specific corrosion products on antibiotic resistance has not been investigated. The objective of this study was to determine the impact of six corrosion products—CuO, Cu<small>₂</small>O, Pb<small>₅</small>(PO<small>₄</small>)<small>₃</small>OH, β-PbO<small>₂</small>, Fe<small>₃</small>O<small>₄</small>, and α-FeOOH—on the abundance of ARB and ARGs. Lab-scale microcosms were seeded with source water from Lake Michigan and amended with individual corrosion products. In general, copper and lead corrosion products increased antibiotic resistance, although not universally across different ARB and ARG types. Concentration and speciation of copper and lead corrosion products were found to have an impact on antibiotic resistance profiles. Meanwhile, iron corrosion products had minimal impact on antibiotic resistance. Overall, this study sheds light on how pipe materials may impact antibiotic resistance as a result of corrosion products.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d4va00026a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140806474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cross-cutting research and future directions under the GAPS networks†","authors":"Tom Harner, Amandeep Saini, Pourya Shahpoury, Anita Eng, Jasmin K. Schuster, Egide Kalisa and Jacob Mastin","doi":"10.1039/D4VA00034J","DOIUrl":"10.1039/D4VA00034J","url":null,"abstract":"<p >The Global Atmospheric Passive Sampling (GAPS) network and GAPS Megacities network (GAPS-MC) are the only global-scale air monitoring programs for persistent organic pollutants (POPs), which support the Global Monitoring Plan (GMP) of the Stockholm Convention on POPs. The GAPS data represents all five United Nation regions and informs the spatial and temporal trends of listed POPs, their long-range transport in air, and new priorities for POPs monitoring and research. This information contributes to the Effectiveness Evaluation of the Stockholm Convention, which is assessed every six years. To ensure its long-term sustainability and relevance, the GAPS network is engaging in cross-cutting studies across fields of science and policy – leading to more holistic and integrative work on air pollution, health, climate science, and biodiversity. Future work under GAPS will continue to advance areas of intersection and tap-into topics and expertise in areas such as non-target analysis (chemical mixture approaches including transformation products in air), advanced data analysis and land-use assessment methods, top-down and inverse global modeling, global air health assessment/warning systems, and citizen science and outreach.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d4va00034j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140593501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fabrication of a novel palladium membrane sensor for its determination in environmental and biological samples","authors":"Adil O. S. Bahathiq, Ahmad O. Babalghith, Alaa S. Amin and Abdelrazek M. Askar","doi":"10.1039/D4VA00056K","DOIUrl":"10.1039/D4VA00056K","url":null,"abstract":"<p >A novel sensitive, specific, and reversible optical sensor for the palladium(<small>II</small>) ion was created by impregnating an agarose membrane with 4-(2-amino-3-hydroxypyridine-4-ylazo)1,5-dimethyl-2-phenyl-1,2-dihydropyrazol-3-one (AHDDO). Spectrophotometric studies of complex formation between the AHDDO base ligand and Mn<small>²⁺</small>, Cd<small>²⁺</small>, Co<small>²⁺</small> Hg<small>²⁺</small>, Zn<small>²⁺</small>, Cu<small>²⁺</small>, Pd<small>²⁺</small>, Sr<small>²⁺</small>, Al<small>³⁺</small>, Fe<small>³⁺</small>, Au<small>³⁺</small>, and Ag<small>⁺</small> metal ions in an ethanolic solution indicated a substantially larger stability for the palladium ion complex. Therefore, the AHDDO was immobilized on a clear agarose film and used as a suitable ionophore for building a selective Pd<small>²⁺</small> optical sensor. By combining the sensing membrane with Pd<small>²⁺</small> ions at pH 5.75, a transparent color change from orange to violet was observed. On the immobilization of AHDDO, the effects of ionophore concentration, pH, temperature, stirring, and reaction time were investigated. A linear relationship was observed between the membrane absorbance at 633 nm and Pd<small>²⁺</small> concentrations in a range from 15 to 225 ng mL<small>⁻¹</small> with detection (3<em>σ</em>) and quantification (10<em>σ</em>) limits of 4.25 and 14.25 ng mL<small>⁻¹</small>, respectively. For the determination of Pd<small>²⁺</small> ions, no significant interference from at least 400-fold excess concentrations of a number of possibly interfering ions was found. The sensor exhibits remarkable selectivity for Pd<small>²⁺</small> ions and can be regenerated through exposure to 0.15 M HNO<small>₃</small>. The sensor has been successfully used to find palladium in biological, soil, road, and water samples.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d4va00056k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140593597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microbially-mediated aerobic oxidation of trace element-bearing pyrite in neutral-pH sandstone aquifer sediments†","authors":"Lisa Haas, Matthew Ginder-Vogel, James J. Zambito, David Hart and Eric E. Roden","doi":"10.1039/D3VA00399J","DOIUrl":"10.1039/D3VA00399J","url":null,"abstract":"<p >Pyrite (FeS<small>₂</small>) is the most abundant sulfide mineral on Earth and represents a significant reservoir of iron and sulfur in modern and ancient sediments. Oxidation of pyrite in the terrestrial subsurface is commonly associated with lowering of groundwater pH and release of constituent trace elements to solution. Although the central role of microbial activity in pyrite oxidation is well understood in acid mine/rock drainage and other low-pH (<em>e.g.</em> pH &lt; 2) environments, the role of microorganisms in mediating pyrite oxidation under circumneutral pH conditions is not well understood. Here we demonstrate the potential for aerobic microbial metabolism to promote circumneutral pH oxidation of trace element-bearing pyrite in Cambrian-age sandstones from Trempealeau County, WI (USA). Microbial activity accelerated <em>ca.</em> 2–5 fold the rate and extent of sulfate release (a direct measure of pyrite oxidation) from reduced pyrite-bearing sediments. pH values dropped to 3 in biotic microcosms which contained limited carbonate (dolomite) buffering capacity. The overall surface area-specific rate constant for pyrite oxidation inferred from batch reaction modeling of these microcosms (10<small>^−7.8</small> mol m<small>⁻²</small> s<small>⁻¹</small>) was <em>ca.</em> 25-fold higher than for the corresponding abiotic reactors (10<small>^−9.2</small> mol m<small>⁻²</small> s<small>⁻¹</small>). Calcium and magnesium were proportionally released to solution with sulfate as a result of carbonate and/or Ca-aluminosilicate dissolution by acid generated from pyrite oxidation. When the amount of acid from pyrite oxidation exceeded the system buffering capacity, metals were selectively released from the geological material. No significant release of trace metals took place in abiotic reactors, which showed much lower rates of pyrite oxidation. These findings suggest that groundwaters in contact with pyrite-containing geological formations contain microorganisms capable of accelerating the oxidation of native pyrite in those formations. Analysis of microbial community composition in the microcosms by 16S rRNA gene amplicon sequencing showed enrichment in organisms related to taxa associated with chemolithotrophic metabolism (<em>Candidatus Tenderia electrophaga</em>, <em>Thioprofundum lithophicum</em>, and <em>Thiobacillus thioparus</em>) from background levels (&lt;2%) to up to 40% of total sequence reads. A reactive transport modeling exercise demonstrated how microbial acceleration of pyrite oxidation could have a crucial, near-term (&lt;10 years) impact on pH decline and trace element release in response to influx of oxygenated groundwater into previously reduced geological strata. Our results have key implications for controls on the onset of low-pH conditions and associated changes in groundwater quality in drinking water wells located within pyrite-bearing geo","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d3va00399j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140593497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2023 Outstanding Papers published in the Environmental Science journals of the Royal Society of Chemistry","authors":"Zongwei Cai, Neil Donahue, Graham Gagnon, Kevin C. Jones, Célia Manaia, Elsie Sunderland and Peter J. Vikesland","doi":"10.1039/D4VA90010C","DOIUrl":"10.1039/D4VA90010C","url":null,"abstract":"<p >A graphical abstract is available for this content</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d4va90010c?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140593595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mineral formation explains the high retention efficiency of dissolved reactive phosphorus in a residential stormwater pond†","authors":"Mahyar Shafii, Stephanie Slowinski, Md Abdus Sabur, Alina Arvisais, Yubraj Bhusal, William Withers, Konrad J. Krogstad, Chris T. Parsons and Philippe Van Cappellen","doi":"10.1039/D3VA00267E","DOIUrl":"10.1039/D3VA00267E","url":null,"abstract":"<p >Stormwater ponds (SWPs) alter the export of the macronutrient phosphorus (P) from urban landscapes, hence impacting the trophic state and water quality of downstream aquatic environments. Despite an increasing number of studies reporting P load reduction by SWPs, the mechanisms responsible for P retention remain unclear. We analyzed P chemical speciation and fluxes in the inflow and outflow of a SWP in the Toronto metropolitan area. In addition, we collected sediment cores to determine under what forms P accumulates in the SWP. The resulting P mass balance for the SWP yielded an average annual retention of 62% for total P (TP). Retention efficiencies varied significantly among the various TP fractions, however: 53% for particulate P (PP), 67% for total dissolved P (TDP), 66% for dissolved unreactive P (DUP), and &gt;80% for dissolved reactive P (DRP), with DRP representing the most bioavailable TP fraction. Sequential chemical extractions performed on the sediment cores indicate that, with increasing sediment depth, the concentration of mineral-bound P increases while that of organic P decreases. We therefore attribute the efficient retention of DRP to biosynthesis of P-containing organic compounds followed by their post-depositional degradation and sequestration of the released phosphate ions by <em>in situ</em> precipitation of inorganic phases, primarily calcium (Ca) minerals. The conditions in the SWP are favorable to the formation of common Ca minerals, such as hydroxyapatite and calcite, including near-neutral to moderately alkaline pH values and high dissolved Ca<small>²⁺</small> concentrations. In areas where urban runoff does not meet these conditions, interventions that stimulate P-containing mineral formation in SWPs may help reduce the export of DRP, hence, protecting receiving water bodies from eutrophication.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d3va00267e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140593717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"From waste to precious: recovering and anchoring Au from electronic wastewater onto poly(m-phenylenediamine) membranes for catalytic nitrophenol conversion†","authors":"Youmei Xu, Yuchao Chen, Mengxia Wang, Yufei Shu, Siyu Cao and Zhongying Wang","doi":"10.1039/D4VA00010B","DOIUrl":"10.1039/D4VA00010B","url":null,"abstract":"<p >Nitrophenol wastewater treatment and extracting and reusing precious metals from electronic wastewater have recently gained considerable attention. In this study, polyaniline-based membranes showcased remarkable gold recovery capability from electronic wastewater, effectively reclaiming 100% of gold on the membrane surface even in the presence of competing metal cations. The prepared Au@PmPD membrane, characterized by its high specific surface area and abundant Au nanoparticles (NPs), demonstrated excellent catalytic activity and stability, maintaining near 100% conversion efficiency in reducing 4-NP to 4-AP in the presence of NaBH<small>₄</small> over extended durations. Compared with the conventional physical mixing method, our <em>in situ</em> formation of the Au@PmPD membrane highlights the superior distribution of Au NPs and active sites for enhanced catalytic efficiency. It eliminates the need for additional steps to load Au NPs onto the membrane, resulting in a more straightforward and efficient process. Overall, this research provides a sustainable approach to repurposing waste into precious resources and offers a promising solution for the efficient treatment of persistent organic pollutants in wastewater, aligning with the principles of a circular economy.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d4va00010b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140593712","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Polycyclic aromatic hydrocarbons in silicone wristbands of Uruguayan children: measurement and exposure source exploration†","authors":"Logan S. Running, James R. Olson, Diana S. Aga, Steven C. Travis, Mónica Daleiro, Elena I. Queirolo and Katarzyna Kordas","doi":"10.1039/D3VA00364G","DOIUrl":"10.1039/D3VA00364G","url":null,"abstract":"<p >Polycyclic aromatic hydrocarbons (PAHs) pose health risks to children, potentially resulting in stunted growth, obesity, and cognitive deficits, but lack of reliable and noninvasive means to measure PAHs results in poor understanding of exposure patterns and sources in this vulnerable population. In this study, 24 children aged ∼7 years (9 boys and 15 girls) from Montevideo, Uruguay wore silicone wristbands for 8 days to monitor the exposure of 27 PAHs. Wristbands were extracted using a modified ethyl acetate tandem solid phase extraction clean up and then analyzed <em>via</em> gas chromatography with tandem mass spectrometry. This analysis has reported LODs for 27 PAHs between 0.05 and 3.91 μg L<small>⁻¹</small>. Eighteen PAHs were detected in &gt;50% of the samples with concentration medians ranging 1.2–16.3 ng g<small>⁻¹</small> of wristband. Low molecular weight PAHs (2–3 rings) such as naphthalene and its alkyl derivatives were highly correlated (0.7–0.9) in the wristbands, suggesting exposure from related sources. Exposure source exploration focused on secondhand tobacco smoke, potentially through caregivers who reported on smoking habits in an associated survey. A principal components analysis (PCA) was conducted to examine patterns in PAH compounds detected in the wristbands; subsequently, the resulting components were compared according to current smoking among caregivers. The PCA analysis revealed a grouping of participants based on higher exposure of 1-methyl naphthalene, pyrene, fluoranthene, 1-methylphenanthrene, dibenzothiophene and 2-phenyl naphthalene. The derived components did relate with parental smoking, suggesting that some participants experienced exposure to a common source of certain PAHs outside of parental smoking. This is the first study to assess PAH exposure in young children from South America. Using wristbands, our study indicates exposure to multiple, potentially harmful chemicals. Wristbands could provide a comprehensive picture of PAH exposure in children, complementing other non-invasive biomonitoring approaches.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d3va00364g?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140593614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A brief review on the assessment of potential joint effects of complex mixtures of contaminants in the environment","authors":"Yu Cheng, Jue Ding, Catherine Estefany Davila Arenas, Markus Brinkmann and Xiaowen Ji","doi":"10.1039/D4VA00014E","DOIUrl":"10.1039/D4VA00014E","url":null,"abstract":"<p >Organisms and humans are exposed to a “cocktail” of contaminants in the environment, but methods for mixture assessment, untargeted analysis, and source identification (fingerprinting) are still lagging, which is critically reviewed in this article. Firstly, this paper briefly summarized both the direct and indirect effects of chemical contaminants at multiple levels on the biological responses of wild organisms. Secondly, the choice of a predictive model for chemical mixture assessment can greatly influence the outcome. Therefore, this review emphasizes the limitation of the main methodologies of risk assessments for chemical mixtures. Thirdly, since current environmental toxicology approaches face barriers to realizing the true potential of advances in analytical chemistry for human health or ecology risk assessment, bioanalytical methods, to screen toxic chemicals or identify unknown chemicals at environmentally relevant levels are reviewed. Lastly, Recently developed machine learning models, incorporating non-targeted screening analysis for the suspect and unknown chemicals and machine learning methods, can be trained on complex datasets to better predict interactions among identified chemicals with random combinations, quantification of similar structural chemicals without the presence of analytical standards, and transfer of chemicals based on their physicochemical properties in human tissues. To perform risk assessments for a variety of chemicals, we propose employing a framework that makes use of a range of methods from the toolbox summarized in this review.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d4va00014e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140593711","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optical properties and molecular differences in dissolved organic matter at the Bermuda Atlantic and Hawai'i ALOHA time-series stations†","authors":"Michael Gonsior, Madeline Lahm, Leanne Powers, Feng Chen, S. Leigh McCallister, Dong Liang, Grace Guinan and Philippe Schmitt-Kopplin","doi":"10.1039/D3VA00361B","DOIUrl":"10.1039/D3VA00361B","url":null,"abstract":"<p >Optically active components, namely marine chromophoric DOM (CDOM) and fluorescent DOM (FDOM), have been used as proxies for refractory DOM (RDOM) in the world's oceans, and numerous studies using ultrahigh resolution mass spectrometry (HRMS) approaches have supplied a tremendous amount of data on the chemical complexity and diversity of DOM. Here, we collected and analyzed high-resolution depth profiles of DOM throughout the water column in the North Atlantic Gyre at the Bermuda Atlantic Time-series Study (BATS) station in August 2019 and in the North Pacific Gyre at station ALOHA (A Long-term Oligotrophic Habitat Assessment) used by the Hawaii Ocean Time-series (HOT) in July 2021. Water samples were collected at 200 m depth intervals from 4530 m at BATS and 4700 m at ALOHA up to the surface and DOM was isolated by solid-phase extraction (SPE). Parallel factor analysis modeled EEM fluorescence revealed changes of “humic-like” and “protein-like” FDOM (FDOM<small>_H</small> and FDOM<small>_P</small>, respectively) in SPE-DOM throughout the water column with higher fluorescence intensities present at ALOHA. Dissolved organic phosphorous (DOP) and dissolved organic sulfur (DOS) concentrations were always higher in SPE-DOM at BATS than at ALOHA, except for DOP in the surface at ALOHA. Negative mode electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) data also revealed fundamental differences between BATS and ALOHA. A novel machine learning algorithm (SOFAR) was implemented and revealed much higher overall oxygen to carbon (O/C) ratio molecular signatures at BATS as the major difference and also much more DOS signatures at BATS when compared to ALOHA. Furthermore, we extracted for the first-time weak anion exchange (WAX) amendable DOM, and the results also showed drastic differences between the two stations. The optical and FT-ICR MS data, converged and supported the idea that DOM in the Atlantic and Pacific basins are fundamentally different when looked at through these analytical windows, at least at these long-term monitoring stations. This finding suggests that the marine DOM is likely turning over at different rates at ALOHA <em>versus</em> BATS and that geographical differences in DOM composition are likely a compounding factor in DOM reactivity.</p>","PeriodicalId":72941,"journal":{"name":"Environmental science. Advances","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/va/d3va00361b?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140298483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}