Article
Engineering, Environmental
Joanna E. Bullard, Zhaoxia Zhou, Sam Davis, Shaun Fowler
Summary: This study examines the impact of saltation on microplastic particles and finds that they undergo size, shape, and surface property changes due to abrasion. Microplastics can be mechanically broken down during aeolian saltation and the resulting small fragments have the potential for long distance transport as well as being within the range that can be inhaled by humans.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Water Resources
Abdelkader T. Ahmed, Mohammed Emad, Mohammed A. Bkary
Summary: The study focused on the effect of changing temperature on the quality of bottled water, finding that temperature alterations can lead to changes in physicochemical properties, exceeding permissible levels for drinking water. Heating bottled water above 50 degrees Celsius is a significant concern for water quality.
APPLIED WATER SCIENCE
(2021)
Article
Environmental Sciences
Malik M. A. Awan, Tyler Malkoske, Husein Almuhtaram, Robert C. Andrews
Summary: This study investigates the removal of microplastics under different operating conditions using controlled laboratory-scale and continuous-flow bench-scale experiments. The results show that the production of aluminum hydroxide floc plays a crucial role in microplastics removal, but there are significant differences between the results obtained from jar tests and full-scale treatment processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Vincenzo Quinzi, Giulia Orilisi, Flavia Vitiello, Valentina Notarstefano, Giuseppe Marzo, Giovanna Orsini
Summary: This study evaluated the potential detachment of microplastics (MPs) from clear orthodontic aligners due to mechanical friction in artificial saliva. The results showed that all tested aligners contained MPs, with the highest number found in the Arc Angel brand and the lowest in Invisalign. This study highlights the release of MPs from clear aligners and raises concerns about its impact on human health.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Analytical
Elena M. Hoppener, M. Sadegh Shahmohammadi, Luke A. Parker, Sieger Henke, Jan Harm Urbanus
Summary: Microplastics are a growing environmental and toxicological concern, and their scale of the problem is not fully known. This study demonstrated the utility of SEM paired with CL in identifying and characterizing different types of microplastics with detailed spatial and chemical resolution.
Article
Environmental Sciences
Kat Austen, Joana MacLean, Daniel Balanzategui, Franz Hoelker
Summary: Microplastic beads tagged with fluorescent dye were introduced into the soil of potted silver birch saplings, and after five months, the presence of microplastic in root tissues was confirmed. This study suggests the potential of woody plants like birch in phytoremediation of soil contaminated with microplastic.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Qi Li, Yupeng Hu, Dehui Kou, Wei Yang, Wei Tang, Qingkong Chen, Sisi Que, Xiaofei Zhao, Deqiang Zhao
Summary: Due to inefficient removal of microplastics by drinking water treatment process, the presence of microplastics in drinking water sources can pose risks to drinking water safety. This study found that bacteria tend to adhere to the surfaces of microplastics, resulting in higher bacterial community richness and diversity compared to the incubation water. The number of bacteria on microplastics increased with decreasing particle size. Moreover, potential pathogens were discovered on microplastics.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Engineering, Mechanical
Babak Omranpour Shahreza, Marco A. L. Hernandez-Rodriguez, Edgar Garcia-Sanchez, Lembit Kommel, Fjodor Sergejev, Armando Salinas-Rodriguez, Anita Heczel, Jeno Gubicza
Summary: This research conducted a comprehensive study on the effect of the modern Severe Plastic Deformation technique, Indirect Extrusion Angular Pressing (IEAP), on the microstructural refinement and tribological properties of niobium. The results showed that IEAP processing resulted in grain refinement, increased hardness, and enhanced wear resistance of niobium.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Biotechnology & Applied Microbiology
A. K. Priya, A. A. Jalil, Kingshuk Dutta, Saravanan Rajendran, Yasser Vasseghian, Hassan Karimi-Maleh, Matias Soto-Moscoso
Summary: In the past 150 years, the production and usage of plastics have replaced traditional materials such as wood, glass, and metals. However, the non-biodegradable nature of plastics poses a significant threat to the environment, leading to the accumulation of plastic garbage and causing harm to life on Earth. Microplastics, especially in aquatic habitats, have the potential to disrupt ecosystem processes and food webs.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Environmental Sciences
Sara Canensi, Gianni Barucca, Cinzia Corinaldesi
Summary: This study describes a specific protocol for extracting and identifying microplastics from deep-sea sediments and evaluates its extraction efficiency. The method is applicable to various sediment types and allows for the extraction of the smallest fraction of microplastics, which have significant impacts on marine biodiversity and ecosystem functioning.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Biotechnology & Applied Microbiology
Setyo Budi Kurniawan, Nor Sakinah Mohd Said, Muhammad Fauzul Imron, Siti Rozaimah Sheikh Abdullah
Summary: Microplastics are an emerging global concern, especially in aquatic environments. Recent research has highlighted the sources of microplastic pollution and their potential threats to the environment. Further study is needed to understand the origins, trophic transfer mechanisms, and potential risks of microplastic pollution.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Review
Environmental Sciences
K. Nirmala, Gayathri Rangasamy, M. Ramya, V. Uma Shankar, G. Rajesh
Summary: Plastic pollution is a growing concern as plastic particles are found in the atmosphere, land, and water due to various pathways. Recent research has shown that plastic particles are present everywhere, from the Arctic to the Antarctic. The ingestion of plastic by all living organisms is natural given the widespread microplastic pollution in the environment. The accumulation of microplastics poses a threat to living beings, and its consequences are still being studied. This review highlights the research conducted by scientists on microplastics in different drinking water sources, emphasizing the need for a uniform protocol for analyzing microplastics quantitatively and qualitatively. It is crucial to address and expand research on microplastic pollution as an ongoing environmental concern.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Applied
Ulrike Braun, Korinna Altmann, Dominik Herper, Markus Knefel, Marius Bednarz, Claus G. Bannick
Summary: The study proposes a new method for analyzing microplastics in food products using a smart filter crucible, allowing for direct determination of their mass content. It was found that the type of beverage bottle can affect the microplastic content, especially related to the quality of plastic material in the screw cap, and particle formation increases during use phase operations.
FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS CONTROL EXPOSURE & RISK ASSESSMENT
(2021)
Article
Environmental Sciences
Daniel Sol, Andrea Menendez-Manjon, Sofia Carrasco, Jacinto Crisostomo-Miranda, Amanda Laca, Adriana Laca, Mario Diaz
Summary: This study investigates the emission of microplastics (MPs) during dishwashing procedures at the household level. The results show that temperature and time significantly affect the release of MPs. Additionally, the material of dishwasher accessories and food utensils also plays a role in the amount of MPs released. Therefore, using environmentally friendly materials can help reduce MP pollution.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biochemical Research Methods
Tong Xin, Yanan Lv, Haoran Chen, Linlin Li, Lijun Shen, Guangcun Shan, Xi Chen, Hua Han
Summary: This article proposes a new method for serial section registration using an unsupervised optical flow network to measure feature similarity and eliminate nonlinear deformation. The optical flow network is also used to estimate and compensate for cumulative registration error, enabling the reconstruction of biological tissue structures. Experimental results demonstrate that this method effectively improves the spatial continuity of serial sections and enhances the accuracy of registration and reconstruction for biological tissue structures.
Article
Ecology
Alessandro Nessi, Alessandro Balestrieri, Anna Winkler, Andrea Guglielmo Casoni, Paolo Tremolada
Summary: Collecting pellets under resting sites is a minimally invasive method to study the diet of the kingfisher Alcedo atthis outside the breeding period. It requires a large number of surveys to find suitable resting sites and obtain sufficient sample size, but allows for a precise estimate of prey frequency and assessment of diet.
Article
Biochemistry & Molecular Biology
Marco Aldo Ortenzi, Stefano Antenucci, Stefania Marzorati, Lucia Panzella, Silvia Molino, Jose Angel Rufian-Henares, Alessandra Napolitano, Luisella Verotta
Summary: This study focused on the low bioavailability of ellagic acid and developed a novel film by combining EA lysine salt with pectin to increase water solubility and control release at physiological targets. The results showed that the new film could achieve higher ellagic acid release in the small intestine environment and exhibited good prebiotic effects.
Article
Environmental Sciences
Eleonora Pargoletti, Valeria Comite, Paola Fermo, Valentina Sabatini, Luisa Annunziata, Marco Aldo Ortenzi, Hermes Farina, Giuseppe Cappelletti
Summary: The study focused on synthesizing low-fluorine content methacrylic-based (MMA) polymeric resins to improve hydrophobicity and protection of cultural heritage, showing potential in inhibiting atmospheric pollutants penetration and preventing sulfate formation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Beatrice De Felice, Stefano Antenucci, Marco Aldo Ortenzi, Marco Parolini
Summary: The study found that washing face masks can release a significant amount of microfibers, with polyurethane and cotton-based masks releasing the highest quantities. There is a lack of research on the contribution of mask-derived microfibers to freshwater contamination, calling for further investigation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Reproductive Biology
Maria Battistoni, Renato Bacchetta, Francesca Di Renzo, Francesca Metruccio, Angelo Moretto, Elena Menegola
Summary: In this study, a refined alternative amphibian method (R-FETAX) was proposed to evaluate chemical induced embryotoxicity. Using the amphibian Xenopus laevis as the model, which has more comparable organ development and morphology to mammalian systems, the study found that different effects of valproate were observed depending on the exposure window, including embryo-lethal and teratogenic effects, as well as neurobehavioral deficits.
REPRODUCTIVE TOXICOLOGY
(2022)
Article
Polymer Science
Lucia Rubino, Giulio Torrisi, Luigi Brambilla, Luca Rubino, Marco Aldo Ortenzi, Maurizio Galimberti, Vincenzina Barbera
Summary: Polyurethane nanocomposites with functionalized nanosized high surface area graphite (G-OH) were prepared. The G-OH showed improved dispersion in a polyol and resulted in polyurethane with a larger temperature range and better mechanical features. The functionalization of graphene layers occurred on the edges, and the reactivity of hydroxylated aromatic rings with isocyanate groups was demonstrated. Therefore, G-OH can act as a multifunctional building block of polyurethane for versatile material applications.
Article
Marine & Freshwater Biology
Lara Nigro, Stefano Magni, Marco Aldo Ortenzi, Stefano Gazzotti, Camilla Della Torre, Andrea Binelli
Summary: This study investigated the possible toxicity of Water-Soluble Polymers on freshwater organisms, revealing that the selected substances did not have significant effects on the tested concentrations in both model organisms.
AQUATIC TOXICOLOGY
(2022)
Article
Toxicology
Maria Battistoni, Francesca Metruccio, Francesca Di Renzo, Renato Bacchetta, Elena Menegola
Summary: The present study compared different methodologies to identify craniofacial malformations in Xenopus laevis assay. The results suggest that the deglutition test is a reliable method for rapidly screening craniofacial abnormalities.
ARCHIVES OF TOXICOLOGY
(2022)
Article
Polymer Science
Stefano Gazzotti, Marco Aldo Ortenzi, Hermes Farina, Alessandra Silvani
Summary: 1,3-Dioxolan-4-ones (DOX) chemistry is used to synthesize UV-curable polylactic acid (PLA)-based copolymers. Copolymerization reactions with different DOX loadings are performed using a solvent-free, metal-catalyzed protocol. The structure and properties of the products are characterized using NMR and SEC analysis.
MACROMOLECULAR CHEMISTRY AND PHYSICS
(2022)
Review
Environmental Sciences
Stefano Gazzotti, Beatrice De Felice, Marco Aldo Ortenzi, Marco Parolini
Summary: The accumulation of plastic waste has become a globally discussed issue, and new strategies are being developed to address this problem. Current research is focused on innovative recycling approaches to reduce the amount of plastic waste that is incinerated or landfilled. The highly heterogeneous nature and versatility of plastic materials pose challenges to efficient recycling, and proper strategies are needed to manage and utilize this waste effectively.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Chemistry, Multidisciplinary
Elisa Impresari, Alberto Bossi, Edoardo Mario Lumina, Marco Aldo Ortenzi, Josine Marie Kothuis, Graziella Cappelletti, Daniela Maggioni, Michael S. S. Christodoulou, Raffaella Bucci, Sara Pellegrino
Summary: Aggregation-induced emissive materials, composed of tetraphenylethylene scaffold combined with fatty acids of different lengths, have been synthesized and characterized for their ability to self-assemble into supramolecular emissive structures depending on chemical composition and water content. These compounds have also been utilized as N-terminus capping agents in peptide-based materials development, leading to the creation of luminescent fibrillary materials that are non-cytotoxic and capable of forming supramolecular gels in aqueous environments.
FRONTIERS IN CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Alessio Massironi, Stefania Marzorati, Alessandra Marinelli, Marta Toccaceli, Stefano Gazzotti, Marco Aldo Ortenzi, Daniela Maggioni, Katia Petroni, Luisella Verotta
Summary: The research focuses on alternative administration methods for anticancer drugs using polymeric nanostructured delivery systems. Curcumin, a naturally occurring polyphenolic phytochemical, was encapsulated within nanoparticles to enhance its therapeutic effects. The study demonstrated that curcumin-loaded nanoparticles exhibited enhanced cytotoxicity against human cervical cancer cells compared to free curcumin.
Article
Environmental Sciences
Arianna Crosta, Beatrice De Felice, Diego Antonioli, Riccardo Chiarcos, Elena Perin, Marco Aldo Ortenzi, Stefano Gazzotti, Roberto Sergio Azzoni, Davide Fugazza, Valentina Gianotti, Michele Laus, Guglielmina Diolaiuti, Francesca Pittino, Andrea Franzetti, Roberto Ambrosini, Marco Parolini
Summary: The study investigated the presence and distribution of microplastics (MPs) on three glaciers in the Central Alps, Northern Italy. The results showed that MPs mainly came from local contamination and long-range transport, and did not accumulate at the glacier snout.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Ada Truscello, Sonia Colletti, Cristian Gambarotti, Marco A. Ortenzi, Stefano Gazzotti, Maurizio S. Galimberti
Summary: This study reports the synthesis of biosourced mellophanic dianhydride (MEDA) from agricultural waste and its use as a chain extender for mechanically recycled PET (R-PET) as a sustainable alternative to oil-based pyromellitic dianhydride (PMDA). The rheological tests showed similar results between R-PET extruded with MEDA and PMDA, and DMTA analysis indicated that R-PET containing MEDA had a 20% higher Young's modulus compared to pristine R-PET in the temperature range commonly used for blow molding bottles. The advantage of MEDA lies in its sustainable production using agricultural waste, while PMDA is derived from oil-based chemistry.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Applied
Ghislain Fotie, Stefano Gazzotti, Marco Aldo Ortenzi, Sara Limbo, Luciano Piergiovanni
Summary: This article compares the gas barrier performance of plastic films coated with cellulose nanocrystals (CNCs) and microfibrillated cellulose (MFC) obtained from cotton linters. The CNCs were chemically isolated using ammonium persulfate (APS) hydrolysis, while the MFC was obtained mechanically either with or without APS-assisted pre-treatment. Mechanical tests and various characterization techniques were performed on the samples. Coated PET films were then evaluated for water contact angle, transparency, opacity, water vapor transmission rate, and oxygen transmission rate. The findings show that MFCaps-based coated films have better oxygen barrier properties at higher relative humidity and higher residue levels during degradation compared to CNCs.
CARBOHYDRATE POLYMER TECHNOLOGIES AND APPLICATIONS
(2023)
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.