Article
Agricultural Engineering
Juhi Gupta, Rashmi Rathour, Christopher Dupont, Arti Mishra, Indu Shekhar Thakur
Summary: The microbial communities in landfill settings are more complex than expected, with factors influencing their composition and biodegradation abilities requiring further investigation.
BIORESOURCE TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Aitor Blanco-Miguez, Francesco Beghini, Fabio Cumbo, Lauren J. McIver, Kelsey N. Thompson, Moreno Zolfo, Paolo Manghi, Leonard Dubois, Kun D. Huang, Andrew Maltez Thomas, William A. Nickols, Gianmarco Piccinno, Elisa Piperni, Michal Puncochar, Mireia Valles-Colomer, Adrian Tett, Francesca Giordano, Richard Davies, Jonathan Wolf, Sarah E. Berry, Tim D. Spector, Eric A. Franzosa, Edoardo Pasolli, Francesco Asnicar, Curtis Huttenhower, Nicola Segata
Summary: MetaPhlAn 4 integrates information from metagenome assemblies and microbial isolate genomes for more comprehensive metagenomic taxonomic profiling.
NATURE BIOTECHNOLOGY
(2023)
Article
Biodiversity Conservation
Suneeti K. Jog, Jason T. Bried
Summary: This study explored the relationship between taxonomic diversity and evolutionary structure in vascular plant assemblages, finding positive correlations between ecological conservatism and native richness with average taxonomic distinctness, and a negative correlation with exotic species. However, the ambiguity and nonlinear relationship of richness suggest that it may not be a suitable bioindicator for wetlands. Further research is needed to understand how evolutionary structure plays a role in bioassessment.
ECOLOGICAL INDICATORS
(2021)
Article
Plant Sciences
Hong Qian, Jian Zhang, Meichen Jiang
Summary: Species diversity of angiosperms varies greatly among regions, with high diversity in tropical regions and low diversity in temperate regions. Geographic patterns of taxonomic and phylogenetic diversity are similar, but differ from patterns of phylogenetic deviation. These metrics can be considered when selecting areas for biodiversity protection.
Article
Biochemistry & Molecular Biology
Silvio Weging, Andreas Gogol-Doring, Ivo Grosse
Summary: kASA is a tool based on k-mer, capable of efficiently identifying and profiling metagenomic DNA or protein sequences with high sensitivity and precision. Custom algorithms and data structures optimized for external memory storage enable a full-scale taxonomic analysis on various devices.
NUCLEIC ACIDS RESEARCH
(2021)
Article
Biodiversity Conservation
Lu Feng, Xiaoming Ma, Alice C. Hughes, Gang Feng
Summary: This study explored the relationships between forest mammal diversity and various factors, such as elevation range, contemporary climate, paleoclimate change, and human activities in China. The results showed that higher elevation range and increased contemporary precipitation and cropland area were associated with higher mammal species richness and improved phylogenetic diversity and structure.
BIODIVERSITY AND CONSERVATION
(2023)
Article
Environmental Sciences
Irene Villalta, Christophe Bouget, Carlos Lopez-Vaamonde, Mathilde Baude
Summary: Urbanisation has varying effects on wild bee communities, negatively impacting species richness and taxonomical diversity, but not total abundance. Different bee species respond differently to urbanisation, with some being positively affected by urban landscape cover. Urban and peri-urban areas also have distinct bee assemblages. Species turnover is the main driver of community dissimilarities along the urban gradient. Urbanisation favors bees with small body sizes, social structure, and extended flight periods, but does not affect the phylogenetic or functional diversity of communities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biochemical Research Methods
Nidhi Shah, Erin K. Molloy, Mihai Pop, Tandy Warnow
Summary: TIPP2 is a marker gene-based abundance profiling method that combines phylogenetic placement with statistical techniques to control classification precision and recall. It provides comparable or better estimates of abundance than other profiling methods and strictly dominates other methods when there are under-represented (novel) genomes present in the dataset.
Article
Environmental Studies
Fan Yang, Zhuoen Liu, Guisheng Yang, Gang Feng
Summary: This study investigated the taxonomic, phylogenetic, and functional beta diversity of wetland bird communities in North China, revealing distinct patterns and suggesting the need for different conservation strategies.
Article
Ecology
Andrea Paz, Jason L. Brown, Carlos L. O. Cordeiro, Julian Aguirre-Santoro, Claydson Assis, Renata Cecilia Amaro, Fabio Raposo do Amaral, Thuane Bochorny, Lucas F. Bacci, Mayara K. Caddah, Fernando d'Horta, Miriam Kaehler, Mariana Lyra, Carlos Henrique Grohmann, Marcelo Reginato, Karina Lucas Silva-Brandao, Andre Victor Lucci Freitas, Renato Goldenberg, Lucia G. Lohmann, Fabian A. Michelangeli, Cristina Miyaki, Miguel T. Rodrigues, Thiago S. Silva, Ana C. Carnaval
Summary: This study investigated the environmental correlates of diversity for multiple clades and diversity measures in the Brazilian Atlantic Forest, finding that environmental variables, particularly current precipitation and precipitation stability over time, are strong predictors of species richness and phylogenetic diversity patterns across different taxa. However, the correlation with phylogenetic endemism varies across groups. Including climate stability over time is important when predicting historical components of diversity.
JOURNAL OF BIOGEOGRAPHY
(2021)
Article
Virology
Haoyun Cai, Yifan Zhou, Xiefei Li, Tianqi Xu, Yimin Ni, Shuang Wu, Yongxin Yu, Yongjie Wang
Summary: Seven uncultured dsDNA bacteriophages were found in Dishui Lake, Shanghai, and their whole genomes were analyzed. The phages showed a close association with protein synthesis and host metabolism. Phylogenetic analysis revealed the presence of three new genera within two known viral families, and four new families in Caudoviricetes.
Article
Ecology
Afroditi Grigoropoulou, Astrid Schmidt-Kloiber, Cesc Murria
Summary: This study assesses the contributions of local and regional processes and historical and contemporary factors in establishing macroecological patterns. The results reveal that regional environmental filtering plays a crucial role in limiting species range and shaping the regional species pool. The study also indicates that there are differences in diversity patterns between northern and southern regions, with northern species pools exhibiting phylogenetic clustering and southern ones showing overdispersion.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2022)
Article
Biodiversity Conservation
Bin Wang, Weijia Ye, Yu Xu, Xue Zhong, Jindong Zhang, Nan Yang, Biao Yang, Caiquan Zhou
Summary: Comprehensive biodiversity protection requires consideration of multiple diversity indexes and the distribution patterns under climate change. This study identified priority areas for conserving Galliformes taxonomic, phylogenetic, and functional diversity in China and assessed their spatial dynamics under climate change. The results showed that current protected areas were incongruent with priority areas, and future priority areas will shift, depending on climate change scenarios.
DIVERSITY AND DISTRIBUTIONS
(2023)
Article
Ecology
Anne Chao, Peter A. Henderson, Chun-Huo Chiu, Faye Moyes, Kai-Hsiang Hu, Maria Dornelas, Anne E. Magurran
Summary: Biodiversity consists of taxonomic diversity, phylogenetic diversity, and functional diversity, which can be integrated and compared effectively under a unified framework using Hill numbers and their generalizations. This allows for meaningful comparisons across studies in the same units of species/lineage equivalents.
METHODS IN ECOLOGY AND EVOLUTION
(2021)
Article
Plant Sciences
Karen De Pauw, Camille Meeussen, Sanne Govaert, Pieter Sanczuk, Thomas Vanneste, Markus Bernhardt-Romermann, Kurt Bollmann, Jorg Brunet, Kim Calders, Sara A. O. Cousins, Martin Diekmann, Per-Ola Hedwall, Giovanni Iacopetti, Jonathan Lenoir, Sigrid Lindmo, Anna Orczewska, Quentin Ponette, Jan Plue, Federico Selvi, Fabien Spicher, Hans Verbeeck, Pieter Vermeir, Florian Zellweger, Kris Verheyen, Pieter Vangansbeke, Pieter De Frenne
Summary: Forest edges harbor a significant amount of terrestrial biodiversity, especially in the understorey, but the functional and phylogenetic diversity of the edges have never been studied simultaneously at a continental scale. Research shows that taxonomic, phylogenetic, and functional diversity of understorey communities in forest edges respond differently to environmental conditions, providing insights into different community assembly mechanisms and interactions. Therefore, looking beyond species richness with phylogenetic and functional diversity approaches is crucial when focusing on forest understorey biodiversity.
JOURNAL OF ECOLOGY
(2021)
Article
Environmental Sciences
Jie Ma, Yi Ding, Chunyun Gu, Guangyao Zhai, Yanbo Liu, Jing Wen, Xun Rong, Chaoyi Luo, Ye Qiu, Ping Zhang
Summary: Benzothiazole (BTH) has been successfully degraded using sulfate radical-based advanced oxidation process (AOP) technique in this study. Several influencing factors were identified, and the primary radical(s) responsible for BTH degradation were determined.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Engineering, Environmental
Haibo Wang, Pingfeng Yu, Cory Schwarz, Bo Zhang, Lixin Huo, Baoyou Shi, Pedro J. J. Alvarez
Summary: Exposure to low concentrations of certain phthalate esters promotes Pseudomonas biofilm formation and resistance to chlorine by upregulating quorum sensing, extracellular polymeric substances excretion, and oxidative stress resistance genes. PAE exposure leads to biofilm densification and stimulates antioxidative system expression, enhancing biofilm resistance to disinfectants.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Review
Engineering, Environmental
Yun Yang, Xiangru Zhang, Jingyi Jiang, Jiarui Han, Wanxin Li, Xiaoyan Li, Kenneth Mei Yee Leung, Shane A. Snyder, Pedro J. J. Alvarez
Summary: This review examines the issue of micropollutants in aquatic environments and presents a ranked list of globally important micropollutants for risk management and remediation efforts.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Jie Ma, Yao Ma, Yanbo Liu, Guangyao Zhai, Shuyu Liu, Hanyu Liu, Gangsen Yue, Xingying Lan, Yuan Feng, Xiaoyuan Qiu, Ping Zhang
Summary: Groundwater pollution poses a significant threat to public health and the environment, and conventional remediation methods have limitations in terms of efficacy and resource consumption. Controlled release materials offer a promising alternative with sustained release of chemical oxidants, prolonged release longevity, and reduced energy and chemical inputs, making them cost-effective and low-maintenance for groundwater cleanup applications.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Green & Sustainable Science & Technology
Inhyeong Jeon, Eric C. Ryberg, Pedro J. J. Alvarez, Jae-Hong Kim
Summary: Poor access to safe drinking water is a major global sustainability issue. Solar disinfection provides a feasible solution. Here the authors examine the potential of five most typical types of this technology, revealing their unique challenges and opportunities.
NATURE SUSTAINABILITY
(2022)
Article
Engineering, Environmental
Qingbin Yuan, Pingfeng Yu, Yuan Cheng, Pengxiao Zuo, Yisi Xu, Yuxiao Cui, Yi Luo, Pedro J. J. Alvarez
Summary: This study demonstrates that bacterial debris generated by chlorination increases the natural transformation frequency of extracellular antibiotic resistance genes (eARGs) by facilitating their adsorption to recipient cells. In contrast, UV irradiation releases predominantly free eARGs with lower transformation frequency. The collision frequency between eARGs and recipient cells increases when eARGs are adsorbed onto chlorination-generated bacterial debris, leading to increased dissemination potential. This study highlights the importance of different disinfection approaches in the dissemination of antibiotic resistance genes.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yaqi Liu, Haibo Gan, Li Tian, Zhenhai Liu, Yunyun Ji, Tong Zhang, Pedro J. J. Alvarez, Wei Chen
Summary: Partial oxidation of iron sulfide nanoparticles enhances their capability in sequestering hexavalent chromium, although it mitigates the reduction process. An optimum oxidation degree exists where the gain in overall performance from enhanced adsorption outweighs the loss from inhibited reduction, resulting in maximum sequestration of aqueous hexavalent chromium as solid-phase trivalent chromium.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Pengxiao Zuo, Jordin Metz, Pingfeng Yu, Pedro J. J. Alvarez
Summary: This study presents a chemical-free approach to control biofilms in water storage systems by encapsulating phages in chitosan crosslinked with tri-polyphosphate and 3-glycidoxypropyltrimethoxysilane. The pH-responsive encapsulation enables the autonomous release of phages in acidic conditions associated with biofilms, effectively reducing biofilm formation on surfaces vulnerable to biofouling. It offers a promising solution for the mitigation of biofilms and the associated pathogens.
Article
Environmental Sciences
Yue Sun, Gangsen Yue, Jie Ma
Summary: This study investigated the influence of soil type, vadose zone thickness, and soil moisture content on benzene vapor transport and natural attenuation in the vadose zone through a column experiment and model study. The results showed that biodegradation is the main natural attenuation mechanism in black soil, while volatilization is the main mechanism in quartz sand, floodplain soil, lateritic red earth, and yellow earth. Increasing the vadose zone thickness and soil moisture content reduces volatilization and increases biodegradation. Overall, this study provides valuable insights into the role of soil type, moisture, and environmental conditions in vadose zone natural attenuation mechanism and vapor concentration.
Article
Engineering, Environmental
Jie Miao, Jian Song, Junyu Lang, Yuan Zhu, Jie Dai, Yan Wei, Mingce Long, Zongping Shao, Baoxue Zhou, Pedro J. J. Alvarez, Lizhi Zhang
Summary: Five-nitrogen coordinated Mn (MnN5) sites effectively activate peroxymonosulfate (PMS) by cleaving the O-O bond into high-valent Mn(IV)-oxo species, with nearly 100% selectivity. This finding highlights the importance of high coordination numbers in single-atom catalysts (SACs) for efficient PMS activation and informs the design of next-generation environmental catalysts.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhe Zhao, Yi-Hao Luo, Tzu-Heng Wang, Shahnawaz Sinha, Li Ling, Bruce Rittmann, Pedro Alvarez, Francois Perreault, Paul Westerhoff
Summary: Biofilms lead to various issues, and UV-C irradiation can effectively inhibit biofilm formation. This study found that adequate UV-C irradiation can inhibit biofilm formation, while insufficient irradiation promotes biofilm formation. Analysis of biofilm samples revealed the mechanism through which UV-C irradiation affects biofilm formation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Yixiao Tan, Pingfeng Yu, Dan Huang, Mengting Maggie Yuan, Zhuodong Yu, Huijie Lu, Pedro J. J. Alvarez, Liang Zhu
Summary: This study investigated the adaptive strategies and ecological functions of phages in microbial aggregates. The results showed that phages exhibited high lysogenicity and had broad host ranges, interacting closely with habitat generalist species. Phage-carried auxiliary metabolic genes played a crucial role in bacterial survival and aggregate stability, with different patterns observed in different habitats.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Review
Engineering, Environmental
Yiqi Yan, Zongsu Wei, Xiaoguang Duan, Mingce Long, Richard Spinney, Dionysios D. Dionysiou, Ruiyang Xiao, Pedro J. J. Alvarez
Summary: Urbanization and industrialization have negatively impacted water quality, leading to a demand for reliable and eco-friendly treatment technologies. Persulfate-based advanced oxidation processes (AOPs) have shown promise in treating challenging industrial wastewaters and remediating contaminated groundwater. Comparisons of reaction rate constants for different pathways suggest that radical-based AOPs can achieve high removal efficiency with short contact times, while nonradical AOPs are advantageous for complex wastewater treatments with minimal interference. However, nonradical pathways require significantly higher energy requirements. These comparisons inform the prioritization of basic research and the understanding of system-specific application merits and limitations.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Sara B. Denison, Peixuan Jin, Priscilla Dias Da Silva, Chun Chu, Bhagavatula Moorthy, Thomas P. Senftle, Kyriacos Zygourakis, Pedro J. J. Alvarez
Summary: Transition metal catalysts can enhance the pyrolytic remediation of soils contaminated with polynuclear aromatic hydrocarbons (PAHs) by increasing the pyrene adsorption and promoting faster degradation at lower temperatures. However, higher pyrolysis temperatures may be required to mitigate residual toxicity.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Zehui Deng, Qingling Xiao, Heyun Fu, Shourong Zheng, Pedro J. J. Alvarez, Dongqiang Zhu, Zhaoyi Xu, Xiaolei Qu
Summary: This study develops a nanozyme-like colorimetric sensing strategy for biomolecule detection in solution and on paper strips based on persulfate activation on Co-based metal-organic frameworks. By switching from H2O2 activation on nanozymes to catalytic persulfate activation, this general strategy provides higher sensitivity, faster speed, and wider application ranges for detection.
CHEMICAL COMMUNICATIONS
(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.