Article
Chemistry, Physical
Azize Ayol, Idris Biryol, Halil Hasar, Ergin Taskan
Summary: This study presents research results on electricity production from waste activated sludge using MFCs during stabilization process. Different MFC configurations equipped with various electrodes were used to measure power and current densities. Experimental results showed that bioelectricity generation was linked to reductions in volatile solids and proteins as a fraction of extracellular polymeric substances.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Instruments & Instrumentation
Alexander Finnegan, Rebekah C. Susserott, Lip-Hwee Koh, Wei-Boon Teo, Chris Gouramanis
Summary: This study introduces a simple sample preparation method that greatly improves the results of Fourier transform infrared analysis. By compressing the fibers and improving their surfaces, the method achieves high matching scores and reproducibility in spectra generation.
APPLIED SPECTROSCOPY
(2022)
Article
Microbiology
Nhlanganiso Ivan Madondo, Sudesh Rathilal, Babatunde Femi Bakare, Emmanuel Kweinor Tetteh
Summary: The application of magnetite-nanoparticles and a microbial fuel cell (MFC) on anaerobic digestion (AD) of sewage sludge was studied. The results showed that the digester with a resistor of 500 ohm performed the best in terms of biogas production, electrochemical efficiency, voltage generation, and contaminant removal. This digester also had the highest annual energy profit. The findings suggest that the use of magnetite-nanoparticles and MFC in AD of sewage sludge holds great promise for biogas production and contaminant removal.
Article
Instruments & Instrumentation
Stephane Chevalier, Jean-Noel Tourvieille, Alain Sommier, Jean-Christophe Batsale, Bruno Beccard, Christophe Pradere
Summary: The technical note presents an advanced thermospectroscopic imager that combines FT-IR spectrometer and thermal camera technologies to image thermal emission and multispectral absorbance fields rapidly. The instrument demonstrates high efficiency and accuracy in processing and measuring, showcasing its potential for studying fast transient thermal and chemical phenomena with improved spectral resolution.
APPLIED SPECTROSCOPY
(2021)
Article
Instruments & Instrumentation
Leigh C. Ward
Summary: Conventional methods for measuring deuterium concentration in body fluids involve isotope ratio mass spectrometry or FT-IR spectroscopy. This study explores an alternative method, ATR FT-IR, which allows for faster analysis with smaller sample volumes. The ATR FT-IR method demonstrated high precision in measuring deuterium in plasma, making it suitable for use in pediatrics where minimal blood sampling is required.
APPLIED SPECTROSCOPY
(2021)
Article
Instruments & Instrumentation
Timothy J. Johnson, Tracy J. Baker, Ashley M. Bradley, Michael O. Yokosuk, Tanya L. Myers
Summary: We report an artifact arising from the back reflection in Fourier transform spectrometers. When samples are oriented normal to the incoming modulated beam, a certain percentage of light can reflect back to the interferometer and be modulated again, resulting in light appearing at twice its true frequency. We have successfully eliminated this artifact by implementing a rotation stage beneath the sample holder.
APPLIED SPECTROSCOPY
(2022)
Article
Instruments & Instrumentation
Emese I. Vegh, Nicholas Marquez-Grant, Rick J. Schulting
Summary: This study investigates the impact of a one year postmortem interval on the structural and chemical alterations of unburnt and burnt bone. The results show that the concentrations of elements associated with extracellular fluid change with the postmortem interval and survive burning. Calcium, phosphorus, iron, aluminum, silicon, and strontium are not significantly altered with burning, while increased crystallinity and carbonate loss can be detected in unburnt bones.
APPLIED SPECTROSCOPY
(2022)
Article
Environmental Sciences
Matthias Philipp, Thomas D. Bucheli, Ralf Kaegi
Summary: The efficient retention of microplastic particles during wastewater treatment leads to their accumulation in sewage sludge, making it a key matrix for understanding microplastic flows. By optimizing a sample preparation protocol for digested sewage sludge, the study measured microplastic number concentrations of around 10,000 #/g, consistent with recent findings from other studies.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Review
Instruments & Instrumentation
Stephanie Wright, Joseph Levermore, Yukari Ishikawa
Summary: Microplastic pollution is a global concern for the environment and human health. In order to assess the potential hazards associated with high concentrations of microplastics, it is necessary to have a comprehensive understanding of exposure concentrations. Infrared and near-infrared microspectroscopies have been used to analyze microplastics in various matrices, and recent advances in technology have allowed for the use of multivariate and machine learning algorithms. This article provides an up-to-date review of the literature on measuring microplastic exposure using infrared spectroscopy and highlights the recent advancements in this field.
APPLIED SPECTROSCOPY
(2023)
Article
Instruments & Instrumentation
John Jerald Villamanca, Lemuel John Hermogino, Katherine Denise Ong, Brian Paguia, Lorenzo Abanilla, Antonio Lim, Lara Mae Angeles, Bernadette Espiritu, Maura Isais, Rock Christian Tomas, Pia Marie Albano
Summary: Early and accurate detection of colorectal cancer is crucial for prognosis and clinical management. Current diagnostic methods often lack sensitivity and specificity, highlighting the need for more accurate alternatives. This study presents support vector machine and feedforward neural network models using Fourier transform infrared spectral data to predict the classification of colorectal tissues. The results demonstrate the importance of attenuated total reflection Fourier transform infrared enhanced by artificial intelligence tools for the diagnosis of colorectal cancer.
APPLIED SPECTROSCOPY
(2022)
Article
Instruments & Instrumentation
Eva Mariasole Angelin, Susana Franca de Sa, Ines Soares, Maria Elvira Callapez, Joana Lia Ferreira, Maria Joao Melo, Mauro Bacci, Marcello Picollo
Summary: Plastics are increasingly used in modern and contemporary art and design, posing a challenge for heritage conservation due to degradation issues. Infrared spectroscopy is a well-established method for analyzing polymeric materials, but limitations exist for in situ investigation of fragile or degraded plastics. Reflectance spectroscopy offers a potential alternative for rapid measurements with minimal contact, though spectral interpretation can be challenging.Comparative studies between different reflectance FT-IR modes, such as ER FT-IR and DRIFTS, have not been extensively explored yet, and this study contributes to a better understanding of their application in plastic analysis.
APPLIED SPECTROSCOPY
(2021)
Article
Biophysics
Nusrat Iqbal, Dipak Kumar Hazra, Aloke Purkait, Amrish Agrawal, Jitendra Kumar
Summary: The study aimed to develop stable neem oil-based nanoemulsion formulation with enhanced pesticide activity, and findings showed that Prosopis juliflora acted as a bio-polymeric adjuvant to stabilize the nanoemulsion, improving stability and efficacy.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Biochemistry & Molecular Biology
Irina Saraeva, Eteri Tolordava, Svetlana Sheligyna, Alyona Nastulyavichus, Roman Khmelnitskii, Nikolay Pokryshkin, Dmitriy Khmelenin, Sergey Kudryashov, Andrey Ionin, Andrey Akhmatkhanov
Summary: This study reports the successful inactivation of P. aeruginosa strain using femtosecond infrared (IR) laser radiation at resonant wavelengths of 3.15 mu m and 6.04 mu m. These wavelengths were chosen due to characteristic molecular vibrations in the main structural elements of the bacterial cells. The structural molecular changes were revealed using stationary Fourier-transform IR spectroscopy, and no visible damage to cell membranes was identified through electron microscopy.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Instruments & Instrumentation
Jie Ke, Chuang Gao, Ana A. Folgueiras-Amador, Katherine E. Jolley, Oscar de Frutos, Carlos Mateos, Juan A. Rincon, Richard C. D. Brown, Martyn Poliakoff, Michael W. George
Summary: A continuous-flow electrochemical synthesis platform has been developed for self-optimization of organic electrochemical reactions using ATR FT-IR and GC as monitoring techniques. Two types of gas-liquid separators were designed to overcome challenges in using ATR FT-IR for downstream analysis when a large amount of hydrogen gas is produced. This approach provides a reliable method for quantifying low-volatile analytes and optimizing reaction conditions without operator intervention.
APPLIED SPECTROSCOPY
(2022)
Article
Instruments & Instrumentation
Maria Lucia Protopapa, Emiliano Burresi, Martino Plamisano, Emanuela Pesce, Loredana Latterini, Nicola Taurisano, Giulia Quaglia, Raffaello Mazzaro, Vittorio Morandi
Summary: The research aims to engineer desired molecular sp(2) structures in graphene oxide by controlled oxidation of graphite powder, in order to achieve tunable chemical and microstructural properties for optoelectronics or sensing applications. Experimental results show that different concentrations of potassium permanganate and potassium hydroxide can change the microstructural and chemical properties of GO, leading to significant enhancement of photoluminescence and introduction of additional electronic energy levels for tuning the functional properties of GO.
APPLIED SPECTROSCOPY
(2022)
Article
Biotechnology & Applied Microbiology
Lili Li, Kun Wang, Liangliang Wei, Qingliang Zhao, Huimin Zhou, Junqiu Jiang
Summary: This study investigated and optimized the mixing performance of gas and non-Newtonian fluid in high solids anaerobic digestion system using CFD simulation, exploring the impact of factors such as mixing energy magnitude, input pattern, and nozzle inlet angle on mixing effectiveness. Results showed that gas dispersed inlet achieved better mixing under specific energy conditions, emphasizing the significance of mixing performance optimization for the operation of high solids anaerobic digestion systems.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Qingwei Gao, Jing Ding, Guanshu Zhao, Qingliang Zhao, Lili Li, Xiaoshan Zhao, Lingjun Bu, Shiqing Zhou, Shan Qiu
Summary: Sulfate radical-based advanced oxidation processes have been widely used in water treatment. In this study, a novel solar-assisted electrooxidation process (SEOP) was developed to degrade bisphenol S (BPS) using activated peroxymonosulfate (PMS) or peroxydisulfate (PDS). The results showed that SEOP with persulfate (PS) demonstrated a synergistic effect for BPS degradation and had lower energy consumption compared to other methods. Additionally, quantum chemical calculations provided insights into the reaction mechanism and active sites for BPS degradation.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Jianju Li, Haizhou Yang, Kena Qin, Liangliang Wei, Xinhui Xia, Fengyi Zhu, Xuefei Tan, Chonghua Xue, Qingliang Zhao
Summary: This study investigated the effect of pig manure-derived sulfadiazine (SDZ) on the species distribution and bioactivities of ammonia-oxidizing microorganisms (AOMs) in soil. The results showed that SDZ had a significant inhibitory effect on AOMs, with comammox being the predominant ammonia oxidizer. AOB was found to be least affected by SDZ compared to other AOMs.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Fengyi Zhu, Xuefei Tan, Weixin Zhao, Likui Feng, Shufei He, Liangliang Wei, Lin Yang, Kun Wang, Qingliang Zhao
Summary: The study demonstrated that using zero valent iron-based composites as fillers for permeable reactive barriers can effectively remove metal ions such as Cu(II), Co(II), Cr(VI) and As(III), showing potential application value. The composites exhibited different selectivity values in different metal systems, and also showed dynamic removal improvement for multiple metals.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Guanshu Zhao, Jing Ding, Fanyang Zhou, Qingliang Zhao, Kun Wang, Xueqi Chen, Qingwei Gao
Summary: A novel W-doped BiVO4 with rich oxygen vacancies oriented on reduced graphene oxide (rGO) photocatalyst was prepared, showing significantly enhanced photocatalytic activity due to the synergistic effect of W doping, BiVO4 with OVs, and rGO. W doping increased photogenerated charge carrier density, rGO expanded surface area and light absorption range, and OVs narrowed band gap and enhanced O-2 generation. The CIP degradation rate constant of W-BiVO4-x/rGO was significantly higher than other photocatalysts, demonstrating its potential for addressing antibiotic residues in wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Environmental
Guanshu Zhao, Jing Ding, Jiayi Ren, Qingliang Zhao, Qingwei Gao, Kun Wang, Liangliang Wei, Xueqi Chen, Fanyang Zhou, Dionysios D. Dionysiou
Summary: The synergistic effect of Fe, NVs, and g-C3N4 in the system promotes the generation of oxysulfur radicals, providing new insights into the mechanisms of sulfite activation for water treatment.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Huimin Zhou, Junqiu Jiang, Qingliang Zhao, Lili Li, Kun Wang, Liangliang Wei
Summary: In this study, a horizontal flow reactor was used to treat food waste under mesophilic, semi-continuous conditions. The methane production, substrate transformation, and microbial community characteristics were evaluated. The results showed that methane production was influenced by the organic loading rate, and the reduction rate of volatile solids was high. Additionally, the concentrations of free ammonia-nitrogen and soluble COD fluctuated significantly. Microbial community analysis revealed changes in the methane metabolic pathway.
Article
Environmental Sciences
Shutian Wang, Qingliang Zhao, Junqiu Jiang, Kun Wang
Summary: In this study, a bioelectrochemical-assisted sludge treatment wetland (BE-STW) system was constructed to improve the degradation ability and efficiency of organic matter in sludge treatment wetlands. The results showed that bioelectrochemistry could further remove chemical oxygen demand, increase hydrolysis efficiency, and generate bioelectricity. This technology provides a new pathway to enhance the efficiency of traditional sludge treatment wetland systems.
Article
Green & Sustainable Science & Technology
Hang Yu, Jianju Li, Jing Liu, Shufei He, Kena Qin, Xinhui Xia, Chonghua Xue, Qingliang Zhao, Liangliang Wei
Summary: This study simulated the effects of operational parameters on the removal performance of typical pollutants in recharged water samples during soil aquifer treatment (SAT) in the Zibo-Weifang funnel area of China. Optimal conditions were determined based on the simulations, and recommendations were made for nitrate concentration threshold and pretreatment measures.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Shutian Wang, Junqiu Jiang, Qingliang Zhao, Kun Wang
Summary: A study constructed four different bioelectrochemical assisted sludge treatment wetland (BE-STW) systems using different substrates to investigate their effects on organic compounds degradation, electricity production, and bacterial community. The results showed that the substrate materials significantly affected the output voltage, power density, and organic carbon removal rate of the systems. The degradation of aromatic compounds was mainly achieved by reducing the hydrophilic fraction and transphilic acid fraction. The substrates also influenced the removal of specific proteins and the fluorescent characteristics of humic acid-like substances. At the genus level, certain bacterial genera dominated the BE-STW systems, and different substrates introduced different bacterial genera.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Yunshu Zhang, Jing Ding, Qingwei Gao, Bo Jiang, Cong Li, Qingliang Zhao
Summary: This study aims to improve the removal efficiency of organics through the synthesis of a low-cost Ti4O7 membrane electrode and the development of a flow-through electrooxidation system. The membrane electrode has high crystallinity and high specific surface area, and the flow-through conditions enhance the liquid-mass transfer, resulting in high degradation efficiency and low energy consumption.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Review
Environmental Sciences
Miao Jiang, Kun Wang, Yipeng Wang, Qingliang Zhao, Weiye Wang
Summary: This paper summarizes the sources of cobalt increase in soil, including natural and anthropogenic sources, and reviews the cobalt species in soil and factors influencing cobalt migration. The status of remediation technologies, particularly phytoremediation and immobilization, is critically evaluated. The paper provides improvement suggestions and prospects for all techniques and serves as a guide for the remediation of cobalt-contaminated soil.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Shuyan Guan, Jing Ding, Qingliang Zhao, Fan Liu, Qingwei Gao, Mallikarjuna N. Nadagouda, Abdulaziz Al-Anazi
Summary: This study investigated the transformation and reaction mechanisms of dissolved organic matter (DOM) during electrocoagulation (EC) and persulfate enhanced electrocoagulation (EC/PS) processes for bio-treated landfill leachate (BLL). The results showed that coupling persulfate with EC enhanced the removal efficiency of chemical oxygen demand (COD) and total organic carbon (TOC). The analysis of sediments generated by EC and EC/PS suggested that precipitation was the main contributor to DOM removal during the EC/PS process. These findings help understand the role of persulfate in landfill leachate treatment and reevaluate its advantages and limitations as an oxidant.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Biotechnology & Applied Microbiology
Qingwei Gao, Lili Li, Kun Wang, Qingliang Zhao
Summary: This review discusses the advantages and challenges of high-solids anaerobic digestion (HS-AD) for managing organic solid waste, and summarizes various strategies for enhancing mass transfer. It also highlights the need for investigating innovative reactor designs and advanced modeling techniques to improve the coupling between mass transfer and methane production.
BIOENGINEERING-BASEL
(2023)
Article
Engineering, Environmental
Weiye Wang, Kun Wang, Qingliang Zhao, Ye Liu
Summary: By using a microbial fuel cell powered electro-Fenton system with the co-addition of lysozyme and 2-bromoethane sulfonate, simultaneous treatment of excess sludge and refractory wastewater was achieved. The system showed high removal efficiency of chemical oxygen demand in sludge and degradation of the model refractory pollutant, as well as the generation of micro-electricity. It also influenced microbial communities and functional genes, leading to improved degradation efficiency of refractory pollutants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
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.
