Article
Environmental Sciences
Eun-Hee Lee, Sangwon Lee, Yunsoo Chang, Seung-Woo Lee
Summary: Screening of plastic polymers with the newly developed PBN fluorophore allows for effective detection of various types of microplastics in bottled waters and environmental waters, revealing plastic contamination levels.
Article
Environmental Sciences
Huan Li, Long Zhu, Mindong Ma, Haiwen Wu, Lihui An, Zhanhong Yang
Summary: In this study, the occurrence of microplastics in bottled water sold in China was determined using laser direct infrared spectroscopy (LD-IR), and the level of microplastic ingestion through drinking water was estimated. The results showed that the average microplastic abundance in bottled water was higher than that in tap water, with the dominant structure being films composed mainly of cellulose and PVC. The sizes of the microplastics were concentrated in the range of 10-50 μm. The estimated daily intake of microplastics by infants through bottled water and tap water was almost twice as high as that by adults.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Subharthe Samandra, Olivia J. Mescall, Katie Plaisted, Bob Symons, Shay Xie, Amanda V. Ellis, Bradley O. Clarke
Summary: The presence of microplastics in bottled water sold in Australia has been documented for the first time. The study found that 94% of the samples tested positive for microplastics, with four times as many microplastics in bottled water sourced and packaged overseas compared to those sourced in Australia. Based on the results, it is estimated that Australians consume 400 microplastics annually through the consumption of bottled water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Sarva Mangala Praveena, Nur Izzati Shamsul Ariffin, Ayu Lana Nafisyah
Summary: This study analyzes the presence and potential risks of microplastics in eight major bottled water brands in Malaysia. The results show that the concentration of microplastics in these bottled water samples is low, with particle sizes mainly ranging from 100 to 300 micrometers. Transparent microplastics are the most prevalent. The study finds that microplastics in bottled water mainly come from packaging materials and bottle caps. Although the estimated dietary intake values are low, the presence of plastic additives and residual monomers in these particles emphasizes the potential risks to human health.
ENVIRONMENTAL POLLUTION
(2022)
Article
Chemistry, Applied
Ingrid Marcela Melo Cardozo, Jeancarlo Pereira dos Anjos, Franciele Oliveira Campos da Rocha, Jailson B. de Andrade
Summary: An exploratory analysis found that various carbonyl compounds (CCs) were present in bottled mineral water in PET containers, with concentrations of some compounds influenced by carbonation. Additionally, plastic material of the bottles and the use of recycled materials may be the main sources of CCs.
Review
Food Science & Technology
Sarva Mangala Praveena, Sawanya Laohaprapanon
Summary: This study conducted a quality assessment of methodological aspects of microplastics in bottled water studies using the CRED evaluation criteria. It found that while improvements have been made in contamination control measures, there is still room for enhancement in this aspect.
Review
Environmental Sciences
Md. Iftakharul Muhib, Md. Khabir Uddin, Md. Mostafizur Rahman, Guilherme Malafaia
Summary: Nowadays, microplastic contamination has been found in various environmental samples, but there have been few recent studies focusing on microplastic contamination in drinking sources and food packages. This review paper briefly summarizes the findings related to microplastic contamination in plastic drinking bottles, tap water, and food packaging containers. The literature shows that different types of microplastic fragments, such as polypropylene, polystyrene, polyethylene terephthalate, polyvinyl chloride, polyethylene, high-density polyethylene, low-density polyethylene, etc., have been detected. Microplastic fragmentation can be caused by mechanical stress, UV radiation, low quality plastic materials, aging, and atmospheric deposition. In addition, microplastics can accumulate various chemical compounds and complex materials from the surroundings, making their accurate detection challenging. The repeated usage of plastic drinking bottles and food containers at the community level can also lead to microplastic leaching and potential health risks. This narrative study highlights the need for more high-quality research in this field to better understand potential exposure to microplastics.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Fallon Nacaratte, Paula Cuevas, Mercedes Becerra-Herrera, Carlos A. Manzano
Summary: Concerns about the quality of drinking water sources have led to the emergence of bottled water as a possible healthier alternative. However, recent studies have found worrisome concentrations of environmental contaminants, including microplastics, in bottled water. This study used fluorescence microscopy to quantify the concentrations of potential microplastics in twelve brands of bottled water in the Santiago Metropolitan Region of Chile. The average concentration of microplastics was 391 ± 125 pL-1, with the highest observed concentration being 633 ± 33 pL-1. Microplastics in the size range of 5 to 20 μm were the major contributors, and their ingestion could potentially lead to alterations in the digestive tract and circulatory systems. The estimated daily intake values were 229 p kg-1 year-1 for individuals weighing 65 kg and 198 p kg-1 year-1 for those weighing 75 kg.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Serdar Dizman, Orkhan Mukhtarli
Summary: This study determined tritium levels in commercially sold bottled natural and mineral waters in Turkey and Azerbaijan. The results demonstrated that consumption by humans of the studied waters would not pose any health risks in terms of tritium.
Article
Environmental Sciences
L. Moreno-Merino, H. Aguilera, A. de la Losa Roman
Summary: Through a comparative study using expert judgment, hydrochemistry, legal regulations, statistical analysis, and machine learning, it has been found that bottled natural mineral water and tap supply water can be distinguished based on the hidden structure in the chemical data. This discovery is valuable for making future choices in the context of water scarcity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Environmental Sciences
Seren Acarer
Summary: Limited research studies have found microplastics of different types, shapes, and sizes in drinking water sources, treatment plants, tap water, and bottled water. Reviewing the available information on microplastic pollution in waters is important for understanding the current situation, identifying deficiencies in studies, and taking necessary measures for public health. This paper provides a comprehensive review of the abundance, characteristics, and removal efficiencies of microplastics in the processes from raw water to tap water and/or bottled water, serving as a guide for addressing microplastic pollution in drinking water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Marine
Hiroshi Asakura
Summary: The pollution caused by plastic waste in the environment is a growing concern. This study introduces a simple method, called the bottle method, to sort microplastics in sediment without the need for filtration. The method effectively separates floating matter from the sediment and allows for both sorting and washing. The recovery rate of microplastics using the bottle method is comparable to other methods and reduces sorting time by half.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Applied
Katalin Bodor, Zsolt Bodor, Alexandru Szep, Rober Szep
Summary: The present study analyzed 53 Romanian origin and commercially available mineral water brands based on their chemical and mineral content, finding significant variations in mineral composition and ion content, with geological structure of the hydromineral basins, post-volcanic activities, and residence time being the main factors influencing differences in chemical composition.
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
(2021)
Review
Environmental Sciences
Isabella Gambino, Francesco Bagordo, Tiziana Grassi, Alessandra Panico, Antonella De Donno
Summary: A narrative review was conducted to describe the current understanding of microplastic presence in drinking water. The 21 reviewed studies revealed the presence of microplastics in tap and bottled water, raising concerns about potential toxicity. The concentration of microplastics increased with decreasing particle size and was higher in bottled water. Drinking water treatment plants showed a high removal rate of microplastics. This evidence suggests that consumers should opt for tap water over bottled water to reduce exposure to microplastics and minimize plastic waste. The high variability among study results highlights the need for a globally shared protocol to harmonize findings.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Medicine, General & Internal
Simone J. M. Stoots, Guido M. Kamphuis, Rob Geraghty, Liffert Vogt, Michael M. E. L. Henderickx, B. M. Zeeshan Hameed, Sufyan Ibrahim, Amelia Pietropaolo, Enakshee Jamnadass, Sahar M. Aljumaiah, Saeed B. Hamri, Eugenio Ventimiglia, Olivier Traxer, Vineet Gauhar, Etienne X. Keller, Vincent De Coninck, Otas Durutovic, Nariman K. Gadzhiev, Laurian B. Dragos, Tarik Emre Sener, Nick Rukin, Michele Talso, Panagiotis Kallidonis, Esteban Emiliani, Ewa Bres-Niewada, Kymora B. Scotland, Naeem Bhojani, Athanasios Vagionis, Angela Piccirilli, Bhaskar K. Somani
Summary: Kidney stone disease is complex and water intake is crucial for prevention, but mineral content can influence disease risk. A study analyzing the global variations in mineral content of bottled drinking water found substantial differences.
JOURNAL OF CLINICAL MEDICINE
(2021)
Article
Biochemistry & Molecular Biology
Valeria Guazzotti, Anita Gruner, Mladen Juric, Veronika Hendrich, Angela Stoermer, Frank Welle
Summary: This study investigates the migration kinetics of polystyrene under different temperatures using food simulants and real foods. The findings suggest that the recommendations provided by EU regulations may not always align with the physicochemical properties of the polymer.
Review
Chemistry, Analytical
Jana Weisser, Teresa Pohl, Michael Heinzinger, Natalia P. Ivleva, Thomas Hofmann, Karl Glas
Summary: This article discusses data analysis methods for identifying microplastics using vibrational spectra, introduces relevant programs provided by the scientific community, and aims to provide guidance for those who want to establish or enhance data analysis routines for vibrational spectra of microplastics.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2022)
Article
Engineering, Environmental
Mohammed S. M. Al-Azzawi, Matin Funck, Marco Kunaschk, Elisabeth Von der Esch, Oliver Jacob, Korbinian P. Freier, Torsten C. Schmidt, Martin Elsner, Natalia P. Ivleva, Jochen Tuerk, Oliver Knoop, Joerg E. Drewes
Summary: This study discusses the best practices for microplastic sampling campaigns in wastewater treatment plants (WWTPs) and explores the potential synergies between thermoanalytical and spectroscopic analysis. The results show that polyethylene (PE) is consistently the most prominent polymer in WWTP effluents and can serve as a surrogate polymer to assess the total polymer removal efficiency of tertiary sand filters.
Article
Microbiology
Marion K. Gallus, Irina Beer, Natalia P. Ivleva, Matthias A. Ehrmann
Summary: In this study, a new strain of Fructobacillus was isolated and identified from the flower of a nodding thistle in Germany. The strain is a Gram-positive, rod-shaped, non-motile bacterium with facultative anaerobic growth. Through various analyses, it was classified as a new species named Fructobacillus cardui.
INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY
(2022)
Article
Chemistry, Analytical
Julian Weng, Kara Mueller, Oleksii Morgaienko, Martin Elsner, Natalia P. Ivleva
Summary: The combination of single-cell Raman microspectroscopy and stable isotope probing allows for tracking carbon and hydrogen fluxes at the single-cell level, with high potential for analyzing metabolic processes and biogeochemical cycles. This study investigates the use of resonance Raman enhanced microspectroscopy for tracking bacterial carotenoids and reveals high phenotypic heterogeneity and evidence for de novo synthesis. It also explores the uptake of hydrogen into carotenoids and a novel approach for simultaneous monitoring of carbon and hydrogen uptake.
Article
Biochemistry & Molecular Biology
Verena N. Schreier, Alex Odermatt, Frank Welle
Summary: Polyethylene terephthalate (PET) is widely used as a food contact material due to its good mechanical properties and recyclability. This study utilized migration modeling to evaluate the migration potential of 52 PET oligomers in various application scenarios. Results were compared with safety thresholds to identify potential risks associated with certain oligomers or applications.
Editorial Material
Biochemical Research Methods
Natalia P. Ivleva, Sebastian Primpke, Jennifer M. Lynch
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Biochemical Research Methods
Maximilian J. Huber, Natalia P. Ivleva, Andy M. Booth, Irina Beer, Ivana Bianchi, Roland Drexel, Otmar Geiss, Dora Mehn, Florian Meier, Alicja Molska, Jeremie Parot, Lisbet Sorensen, Gabriele Vella, Adriele Prina-Mello, Robert Vogel, Fanny Caputo
Summary: A comprehensive physicochemical characterization of heterogeneous nanoplastic (NPL) samples remains challenging due to the need for a combination of measurement techniques to improve accuracy and robustness. Various methods including DLS, NTA, TRPS, TEM, SEM, CLS, FFF-MALS, pyGC-MS, and RM were evaluated for NPL size, shape, chemical composition, and quantification. The applicability and limitations of these methods were assessed using representative particles of different chemical natures. The results showed that orthogonal batch methods provided comparable results for monodisperse spherical samples, while deviations were observed in polydisperse and non-spherical particles. Specific techniques such as TRPS and electron microscopy provided increased resolution and morphological information.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Biochemical Research Methods
Oliver Jacob, Alejandro Ramirez-Pinero, Martin Elsner, Natalia P. Ivleva
Summary: Accurate quantification of small microplastics in environmental and food samples is essential for studying their potential hazard. Raman microspectroscopy can identify particles as small as 1 μm in diameter. This study presents a new software, TUM-ParticleTyper 2, which allows for automated quantification of microplastics across the defined size range, using random window sampling and on-the-fly confidence interval estimation.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Green & Sustainable Science & Technology
Frank Welle
Summary: Using new polystyrene polymer as a functional barrier to introduce post-consumer polystyrene recyclates in packaging materials. However, there is no official guidance on how to test the performance of a functional barrier, and no threshold limits for the evaluation of post-consumer recyclates have been published. In this study, co-extruded yogurt cups with artificially spiked core layer were investigated for migration of applied surrogates. The migration kinetic testing method was shown to be sensitive and suitable for evaluating the functional barrier performance. Based on the conditions, data, and evaluation presented, the use of post-consumer recycled PS behind a functional barrier can be considered safe.
Article
Green & Sustainable Science & Technology
Frank Welle
Summary: The increase in plastic recycling is crucial for a circular economy, and recycling polystyrene (PS) back into food contact materials holds promise. However, commercial-scale PS cup recycling has not been established yet. The health and safety of consumers must be ensured, and therefore, recycling processes need to undergo a rigorous assessment. However, evaluation criteria for PS recycling are currently not available, which is a disadvantage for process developers.
Article
Green & Sustainable Science & Technology
Christian Rung, Frank Welle, Anita Gruner, Arielle Springer, Zacharias Steinmetz, Katherine Munoz
Summary: According to the European circular economy strategy, all plastic packaging placed on the market by 2030 has to be recyclable. The European Food Safety Authority (EFSA) has derived very low migration limits for recycled polymers in direct contact with food. PET is currently the only polymer that complies with EFSA's requirements for a circular economy. However, better-structured collection systems and cleaning processes, as well as more analytical methods, might offer the possibility of implementing other polymers into recycling processes in the future.
Article
Spectroscopy
Maria Lanzinger, Dominik Huber, Virginia Merk, Stephanie Kaufmann, Michael Schuster, Natalia Ivleva
Summary: In today's industrial production, it is crucial to eliminate particle contamination in order to ensure the safety and quality of products. This study focuses on the representativeness of in-house generated aluminum reference particles to their source bulk material through quantitative element analysis. The results validate the functionality and applicability of using laser-induced breakdown spectroscopy (LIBS) for particle analysis and provide a new method for the easy generation of internal reference particles.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Review
Environmental Sciences
Thilo Hofmann, Subhasis Ghoshal, Nathalie Tufenkji, Jan Franklin Adamowski, Stephane Bayen, Qiqing Chen, Philip Demokritou, Markus Flury, Thorsten Hueffer, Natalia P. Ivleva, Rong Ji, Richard L. Leask, Milan Maric, Denise M. Mitrano, Michael Sander, Sabine Pahl, Matthias C. Rillig, Tony R. Walker, Jason C. White, Kevin J. Wilkinson
Summary: Plastics have been widely used in agriculture, but their accumulation in soils has become a major issue. Controlling plastic pollution in agriculture requires rational use, reduction, collection, and innovative recycling. Sustainable alternatives with smaller environmental impacts should be promoted, along with better monitoring, technical innovation, education, and economic incentives.
COMMUNICATIONS EARTH & ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Rainer Brandsch, Mark Pemberton, Dieter Schuster, Frank Welle
Summary: Food contact materials (FCMs) can transfer chemicals to food before consumption. The migration testing conditions for FCMs are conservative and often assume worst-case scenarios. In repeated-use FCMs, the steady-state is rarely reached, and migration is diffusion-controlled. Modeling based on diffusion parameters can be used to assess migration in certain domains. These findings are significant for regulatory guidance and compliance practices.
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.