Article
Agronomy
Maria Hasnain, Neelma Munir, Zainul Abideen, Daniel Anthony Dias, Farheen Aslam, Roberto Mancinelli
Summary: The use of nanotechnology can increase biofuel generation from algae. This study focuses on the effects of silver nanoparticles on biomass, metabolites, and lipid profile of algae for algal fuel production. The results show that silver nanoparticles enhance the uptake of silver ions and improve phytoremediation in algae. Furthermore, the application of nanoparticles significantly increases protein and lipid production, with a 60% increase in lipid yield using 0.08 mg/L silver nanoparticles. The fatty acid composition of algae with silver nanoparticle addition meets biodiesel standards. Overall, this study suggests that the uptake of silver nanoparticles can enhance fatty acid production in algae and has potential for sustainable biodiesel production, with Ulothrix sp. algae identified as the most promising feedstock.
Article
Biotechnology & Applied Microbiology
Stefanie Van Wychen, Steven M. Rowland, Kaitlin C. Lesco, Peter Shanta, Tao Dong, Lieve M. L. Laurens
Summary: Opportunities in biomass production and bioproduct isolation from algae-derived feedstocks are promising, but the lack of validated compositional analysis methods poses a challenge. Utilizing a bottom-up approach for algal biomass characterization can help achieve full mass balance and economic potential.
JOURNAL OF APPLIED PHYCOLOGY
(2021)
Article
Environmental Sciences
Judit Martin Juarez, Sonia Martinez-Paramo, Maria Mate-Gonzalez, Pedro A. Garcia Encina, Raul Munoz Torre, Silvia Bolado Rodriguez
Summary: This study evaluated the effect of different pretreatments on the solubilisation of components in microalgae-bacteria biomass, with acid pretreatment showing the highest carbohydrate solubilisation (98%) and monosaccharide recovery (81%). Physical pretreatments, especially bead milling, also increased the solubilisation of the biomass components during enzymatic hydrolysis.
Review
Food Science & Technology
Ioannis G. Stathas, Anastasios C. Sakellaridis, Marina Papadelli, John Kapolos, Konstantinos Papadimitriou, George J. Stathas
Summary: This review article focuses on the impact of insect pests on the quality of stored cereals and legume grains. It discusses the changes in amino-acid content, protein quality, carbohydrates, and lipids, as well as the technological characteristics of infested raw materials. The effects of infestation vary depending on the insects' trophic habits, component distribution in different grain species, and storage period. Understanding the impact of insect infestation on stored agricultural products and food quality is crucial for future food security.
Article
Ecology
Remi Gerber, Lilian Cabon, Christophe Piscart, Jean-Marc Roussel, Benjamin Bergerot
Summary: This study examined the content of different body stores in merolimnic insects and found correlations with insect mass, insect order, and gender. The findings highlight the importance of dispersal strategies as a structuring factor in body store patterns of merolimnic insects.
FRESHWATER BIOLOGY
(2022)
Article
Chemistry, Physical
B. Velmurugan, L. Devaraj Stephen, S. Karthikeyan, S. Binu Kumari
Summary: The reduced cost of pesticide use in agricultural production leads to increased usage, resulting in serious threats to the aquatic environment. Fishes, as bioindicators of toxicants in the water, provide valuable information about the aquatic biota. The study of pesticide toxicity in fish is important for understanding and assessing the impact of pollution in the ecosystem.
JOURNAL OF MOLECULAR STRUCTURE
(2022)
Review
Environmental Sciences
Faiz Ahmad Ansari, Abhishek Guldhe, Sanjay Kumar Gupta, Ismail Rawat, Faizal Bux
Summary: The aquaculture industry requires large amounts of fish feed, and microalgae is gaining attention as a potential alternative feed ingredient. Rich in proteins, lipids, and other bioactive compounds, microalgae can be an important component of aquaculture feed.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Nestor A. Urbina-Suarez, Darly D. Ayala-Gonzalez, Jennyfer D. Rivera-Amaya, Andres F. Barajas-Solano, Fiderman Machuca-Martinez
Summary: The study evaluated the effect of tannery wastewater on biomass and product production of three microorganisms. The results indicate that the use of a constant light regime and the concentration of real wastewater have a significant impact on biomass production.
Article
Energy & Fuels
Anuj Thakkar, Philip T. Pienkos, Nick Nagle, Tao Dong, Jacob Kruger, Sandeep Kumar
Summary: The integrated biorefinery concept is an innovative and cost-effective method for efficiently utilizing biomass components. In this research, microalgae were fractionated using flash hydrolysis and acid hydrolysis, with acid hydrolysis proving to be more effective in recovering microalgae proteins and carbohydrates. The extracted wet solids from both processes were used to produce microporous biocarbon nanosheets through thermal activation. Overall, the integrated process maximized the utilization of microalgae components.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Physical
Yeinner Tarazona, Alejandro Vargas, Guillermo Quijano
Summary: The present study found that the initial proportions of carbohydrates, proteins and lipids in the substrate have a significant effect on the efficiency of hydrogen production, with the optimal condition being 56% carbohydrates, 22% proteins and 22% lipids, accompanied by the generation of acetic and butyric acids.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Sarah I. Z. Abdel-Wahab, Ali A. A. Aioub, Rehab E. M. E. Salem, Ahmed E. A. El-Sobki
Summary: Herbicides can reduce the negative effects of weeds but may impact the metabolism of crops. The study found that herbicides decreased protein and lipid concentrations in wheat shoots but increased carbohydrate concentration. Different herbicide combinations had varying effects on different wheat cultivars, with some combinations enhancing protein and lipid concentrations in certain cultivars.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Food Science & Technology
Olga Babich, Vyacheslav Dolganyuk, Anna Andreeva, Dmitriy Katserov, Liudmila Matskova, Elena Ulrikh, Svetlana Ivanova, Philippe Michaud, Stanislav Sukhikh
Summary: Methods for purifying and characterizing components from microalgae were developed, and the effects of carbohydrates on lipid accumulation were studied. Valuable components were found in microalgae, making this research important in various scientific fields and feed additive production.
Article
Biochemistry & Molecular Biology
Jordy Kim Ung Ling, Kunn Hadinoto
Summary: Greater awareness of environmental sustainability has led to the transition from synthetic organic solvents to greener solvents in various industries. Deep eutectic solvents (DESs), with their demonstrated applications in extraction of small-molecule bioactive compounds, are considered highly promising green solvents. However, the use of DES in biomacromolecule extraction has not been extensively studied. This review provides an overview of DES properties and discusses recent advances in DES extraction of proteins, carbohydrates, and lipids. It also highlights the importance of DES properties on extraction performance and identifies future research needs.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Review
Chemistry, Multidisciplinary
Andres Rodriguez-Galvan, Flavio F. Contreras-Torres
Summary: Scanning tunneling microscopy (STM) is an important technique for directly observing individual biomolecules at near-molecular scale. It plays a crucial role in structural analysis, understanding imaging formation, and developing related techniques.
Article
Biotechnology & Applied Microbiology
Bogolitsyn Konstantin, Parshina Anastasia, Ivanchenko Nikolay, Polomarchuk Daria
Summary: The study analysed the changes in chemical composition of macroalgae in the White Sea during the growing season. It found increased levels of polyphenols, pigments, and saturated fatty acids, likely due to solar activity, photosynthesis, and higher seawater temperature. August was identified as the optimal month to harvest macroalgae with valuable chemical compounds, and specific species were recommended for isolating different components. Compared to macroalgae from Europe, the Far East, and Southeast Asia, the White Sea species showed high potential as a new source of lipophilic substances and cellulose.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Chemistry, Physical
Shanshan Xiong, Lingdan Wang, Hanrui Chai, Yanchao Xu, Yang Jiao, Jianrong Chen
Summary: Reasonable structural design and metal-doping play significant roles in optimizing electrochemical energy storage and conversion. The Mo-doped NiCo2O4 samples exhibit excellent supercapacitor performance and electrocatalytic activity, with a specific capacitance of 3970 mF cm(-2) at 1 mA cm(-2) and remarkable rate performance. The nanocomposites also show remarkable long-term stability as an electrocatalyst during the oxygen evolution reaction.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Ying Liu, Liguo Shen, Zhengyi Huang, Jiahao Liu, Yanchao Xu, Renjie Li, Meijia Zhang, Huachang Hong, Hongjun Lin
Summary: In this study, a PVDF-Ni-Co membrane was fabricated using an in-situ reduction method, showing excellent conductivity, magnetism, and in-situ micro-aeration function. The membrane exhibited outstanding decoloration efficiency to RB, CR, and MB solutions, with a rejection rate of 98.33% to CR solution. Additionally, in-situ micro-aeration was confirmed to be critical in enhancing membrane antifouling performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Shuting Weng, Shuke Li, Yanqiu Xu, Yanchao Xu, Yang Jiao, Jianrong Chen
Summary: A series of in-situ grown bimetallic Metal-organic frameworks (MOFs) self-supporting electrodes have been designed with an easy one-step strategy, exhibiting remarkable electrochemical activity for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). The prototype electrolytic unit with Ni/Fe3-MOF electrode shows similar catalytic performance to benchmark precious metal-based catalysts in overall water splitting. Ni/Fe3-MOF also demonstrates an excellent specific capacitance of 6377.6 mF cm-2.
Article
Environmental Sciences
Ali Hyder, Jamil A. Buledi, Muhammad Nawaz, Dhani B. Rajpar, Zia-ul-Hassan Shah, Yasin Orooji, Mehmet Lutfi Yola, Hassan Karimi-Maleh, Hongjun Lin, Amber R. Solangi
Summary: Heavy metal pollution poses a serious threat to human health and the environment, prompting researchers to develop specific analytical methods for heavy metal ion determination and utilize metal nanoparticles for rapid detection. Research has focused on utilizing materials such as gold, silver, and copper nanoparticles for colorimetric sensing of toxic metal ions, with a focus on stability and functionalization of the nanoparticles. This review covers comprehensive work on colorimetric detection of heavy metals using metal nanoparticles from 2014 onwards.
ENVIRONMENTAL RESEARCH
(2022)
Article
Energy & Fuels
Lun'ang Li, Xun Li, Ze Wang, Bo Wang, Hongjun Lin, Wencheng Hu, Feng Chang, Bo Zhou
Summary: This study investigated the flow and spray fields in a realistic concentric staged high-temperature-rise combustor using high-speed particle image velocimetry (PIV) and planar laser-induced fluorescence (PLIF). The results showed strong coupling between the pilot and main swirling flows, leading to the formation of recirculation zones. The presence of a precessing vortex core was observed when the two stages were flowing jointly. Comparing the flow field with the spray field revealed the importance of the unsteady flow motion in understanding the spray distribution. The findings provide valuable insights into the complex flow-spray coupling in the combustor.
Article
Chemistry, Physical
Jiahao Liu, Liguo Shen, Hongjun Lin, Zhengyi Huang, Huachang Hong, Cheng Chen
Summary: In this study, a PES-Ni@UiO-66 membrane was prepared by coating UiO-66 with magnetic Ni and incorporating it into the PES membrane matrix. The distribution of magnetic Ni@UiO-66 was controlled by an external magnetic field, and the hydrophilic Ni@UiO-66 was pulled onto the membrane surface, resulting in a membrane with higher hydrophilicity and superior water permeability. Moreover, the membrane exhibited excellent photocatalytic self-cleaning ability and antifouling performance due to the photocatalytic activity of the exposed Ni@UiO-66 on the membrane surface.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Xiaojing Li, Lu Chen, Junfeng Wang, Jiayu Zhang, Chunran Zhao, Hongjun Lin, Ying Wu, Yiming He
Summary: A novel heterojunction composite BiPt/KTa0.5Nb0.5O3 (KTN) with optimized Bi and Pt contents was synthesized and showed improved photocatalytic performance in ammonia synthesis compared to pure KTN, 1 %Bi/KTN, and 0.25 %Pt/KTN. The BiPt alloy nanoparticles formed on the surface of KTN nanocubes provided an appropriate Schottky barrier, efficiently capturing and separating photogenerated charge carriers. The loaded BiPt alloy also broadened the material's photoresponse to visible light through surface plasmon resonance, contributing to increased photoactivity. This study not only offered a potential photocatalyst for nitrogen fixation but also proposed new ideas for designing highly efficient catalysts through bimetal alloy modification.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Environmental Sciences
Zhenxiang Pan, Bizhen Zeng, Genying Yu, Jiaheng Teng, Hanmin Zhang, Liguo Shen, Lining Yang, Hongjun Lin
Summary: This study investigates the effect of EDTA on fouling caused by transparent exopolymer particles (TEP), revealing that EDTA can change the microstructure of TEP and consequently impact the fouling behavior. Initial addition of EDTA reduces the specific filtration resistance of TEP, but continuous addition increases it. The findings highlight the thermodynamic mechanism of EDTA-induced TEP fouling and emphasize the importance of EDTA dosage and pH adjustment in controlling TEP fouling.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Wenjing Wu, Yingying Liu, Chunze Li, Fangyu Zhuo, Zexiong Xu, Huachang Hong, Hongjie Sun, Xianfeng Huang, Xinwei Yu
Summary: This study found that 2,6-dichlorobenzoquinone (2,6-DCBQ) had detrimental effects on antioxidant enzymes, key genes in the Nrf2-keap1 pathway, and lipid peroxidation in mice.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Chemistry, Physical
Mengying Qian, Fangyu Zhuo, Yu Li, Penghui Yi, Yubei Gao, Weilu Zhou, Yanlong Sun, Jianrong Chen
Summary: In this study, a novel electro-Fenton system using Fe-N-C catalyst supported on carbon felt as the cathodic catalyst and air as the oxygen source was developed. The CF/Fe-N-C catalyst exhibited high efficiency in the degradation and mineralization of antibiotics in aqueous solution. It also demonstrated outstanding reusability and stability, and could be used for the in-situ fabrication of reticular nanostructure.
APPLIED SURFACE SCIENCE
(2023)
Review
Engineering, Environmental
Mingzhu Zhou, Junjie Chen, Shuning Yu, Binghong Chen, Cheng Chen, Liguo Shen, Bisheng Li, Hongjun Lin
Summary: This paper introduces a PS-activation catalysis-membrane system (PACMS) for wastewater treatment, including homogeneous and heterogeneous systems. The activation methods and mechanisms of PS in PACMS are discussed, and various preparation strategies of catalytic membrane are summarized. The applications of PACMS in wastewater treatment are highlighted.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Hui Zou, Jiahui Huang, Meijia Zhang, Hongjun Lin, Jiaheng Teng, Zhengyi Huang
Summary: This study demonstrates that the addition of magnesium ions (Mg2+) can significantly reduce protein fouling on membranes, and an optimal concentration of Mg2+ exists for achieving the lowest fouling. This is attributed to the hydration repulsion effect of Mg2+ and the conformational change of protein molecules.
Article
Environmental Sciences
Huachang Hong, Yuchen Lu, Xiaoyan Zhu, Qiang Wu, Lingmin Jin, Zhigang Jin, Xiaoxuan Wei, Guangcai Ma, Haiying Yu
Summary: In this study, the cytotoxicity of 29 nitrogenous disinfection byproducts (N-DBPs) in drinking water was evaluated using human embryonic kidney cells. The study found that the cytotoxicity of N-DBPs differed based on their molecular structures and halogenations. The reactivity of N-DBPs with glutathione, an antioxidant in cells, was also analyzed. The study developed quantitative structure-activity relationship (QSAR) models to predict the cytotoxicity of other N-DBPs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yansha Zeng, Zhe Wang, Zhenxiang Pan, Liguo Shen, Jiaheng Teng, Hongjun Lin, Jianzhen Zhang
Summary: This study investigated the combined effects of polymeric aluminum chloride (PAC) and polyacrylamide (PAM) on sludge dewatering, aiming to uncover the underlying mechanisms. The co-conditioning of 15 mg g-1 PAC and 1 mg g-1 PAM achieved optimal dewatering performance, significantly reducing the specific filtration resistance (SFR) of the co-conditioned sludge. The findings provide insights into the improved dewatering performance and the thermodynamic mechanisms of sludge dewatering with different chemical conditioning.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Chemical
Ning Kong, Liguo Shen, Qianqian Zeng, Cheng Chen, Jiaheng Teng, Yanchao Xu, Leihong Zhao, Hongjun Lin
Summary: A novel approach involving the synthesis of ultra-thin MXene and ferroferric oxide doped molybdenum disulfide (FM) was developed to improve the performance of MXene membranes for oil separation. The resulting membranes showed enhanced interface hydrophilicity, increased surface roughness, and improved permeability, leading to high water flux and efficient oil separation.
JOURNAL OF MEMBRANE SCIENCE
(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.
