Article
Materials Science, Multidisciplinary
Nestor J. Zaluzec
Summary: Aberration correction in the analytical transmission electron microscope has been closely associated with advancements in high-resolution imaging. This paper demonstrates that by combining this technology with new system designs that optimize electron optics and x-ray detection, performance has improved by more than tenfold over the past 25 years.
MICROSCOPY AND MICROANALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Shaodong Zhou, Kelei Xi, Songlin Zhuang, Qingqing Cheng
Summary: This study introduces a terahertz metalens with spherical aberration correction that utilizes dynamic phase for polarization multiplexed imaging. The metalens shows high imaging efficiencies and extinction ratios, exceeding 50% and 10:1 respectively. It offers a new approach for achieving multifunctional beam steering, tomographic imaging, and chiroptical detection.
Article
Engineering, Environmental
Xingdong Shi, Wei Wei, Lan Wu, Bing-Jie Ni
Summary: This review comprehensively summarizes the mechanisms of ZVI for enhancing nutrients removal in biological wastewater treatment, discusses the role of ZVI in improving excess sludge reduction for methane production, and analyzes the feasibility of recovering phosphorus from anaerobic sludge digestion system through using ZVI. Additionally, knowledge gaps regarding the application of ZVI in sludge or wastewater treatment are identified to facilitate further development of ZVI-based biological technology.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Jinhua Wu, Mingjia Yan, Sihao Lv, Weizhao Yin, Huaitian Bu, Li Liu, Ping Li, Hong Deng, Xiangyu Zheng
Summary: Using carboxymethyl cellulose (CMC) to stabilize zero-valent iron nanoparticles (CMC-nFe(0)) was found to enhance hexavalent chromium (Cr(VI)) removal efficiency by improving dispersion and antioxidation, preventing agglomeration and oxidation of particles, and effectively blocking oxygen infiltration, showcasing superior performance compared to untreated iron nanoparticles. Lower initial pH and higher iron dosage were found to further facilitate Cr(VI) removal. These findings suggest that CMC stabilization of iron nanoparticles holds promise for enhancing Cr(VI) elimination processes.
Article
Engineering, Chemical
Ye Li, Yangyang Ding, Hongbin Wei, Shaolin Li
Summary: The dense microscale zero-valent iron (mZVI) particles can face hydrodynamic problems in wastewater treatment unit operations, but can be improved by modifying with inorganic floc. This modification method enhances the mixing, settleability, and fluidity of mZVI in concentrated form, making it more adaptable to large-scale wastewater treatment applications.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Nuntiya Paepatung, Nimaradee Boonapatcharoen, Warinthorn Songkasiri, Hidenari Yasui, Chantaraporn Phalakornkule
Summary: This study investigates the effects of zero-valent iron (ZVI) on the growth and activities of methane-producing archaea and sulfate-reducing bacteria in the anaerobic digestion process. The results show that ZVI not only provides extra electrons for methane production, but also reduces the inhibition of methane-producing archaea by co-precipitating sulfides.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Yilong Hua, Wei Wang, Nan Hu, Tianhang Gu, Lan Ling, Wei-xian Zhang
Summary: The core-shell structure of nanoscale zero-valent iron (nZVI) has been shown to provide multiplex solution and surface chemistry for reliable and high-efficiency enrichment and separation of uranium from low-level sources. Treatment of uranium-tailings wastewater in continuous-flow reactors resulted in reacted nZVI with high uranium content and treated wastewater with significantly reduced uranium concentration. This research further supports the cost-effective use of nanotechnology for pollution control and resource recovery.
ENVIRONMENTAL SCIENCE-NANO
(2021)
Article
Agricultural Engineering
Li Zhang, Yueping Wang, Shiwei Hao, Quanhao Dou, Shuang Lan, Yongzhen Peng
Summary: A novel process was developed to simultaneously remove nitrogen and phosphorus from wastewater using anammox-synchronous zero-valent iron (ZVI) oxidation. The formation of iron phosphate minerals promoted phosphorus removal efficiency and the activity of anammox bacteria.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jiajia Si, Xinglong Yang, Hengwei Luan, Yang Shao, Kefu Yao
Summary: This study successfully enhanced the performance of zero-valent iron in degrading dyeing wastewater by constructing composite materials with a special porous structure. The porous structure greatly improved the degradation performance of the composite materials, especially in neutral and alkaline environments, providing the possibility of achieving cheap, fast, and durable degradation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Jakkapop Phanthasri, Dickson Yuk-Shing Yan, Kitirote Wantala, Rattabal Khunphonoi, Pummarin Khamdahsag, Visanu Tanboonchuy
Summary: Excessive levels of selenium in water are mainly caused by fossil fuels combustion, coal-fired power plant activity, and mining operations. Selenium contamination poses significant risks to human health. Zeolite-supported nanoscale zero-valent iron coated onto bentonite-zeolite pellets has shown promising potential for the removal of selenium in contaminated water.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Hao Xu, Xingong Li, Mengxi Gao, Xinjiang Hu, Xuefei Zhang, Yan Li, Xinyu Xu, Jianjie Hu, Chunfang Tang, Xi Hu
Summary: A chitosan and biochar synergistically-modified sulfurized nano-zero-valent iron was synthesized and tested for efficient removal of Pb2+ from aqueous solution. The optimal synthesis parameters were determined, and the effects of solution pH and ionic strength on Pb2+ removal were investigated. The study also revealed that the removal mechanisms involved adsorption, reduction reaction, and complexation reactions.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Yajie Li, Lingyu Liu, Qingshui Wang, Jiazi Wu, Tonghui Liu, Hongbo Liu, Yaoliang Hong, Tianyin Huang
Summary: Anaerobic co-metabolism of coal gasification wastewater with the assistance of ZVI can effectively reduce COD and total phenols, leading to improved methane production efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Min Yan, Zhongxian Su, Jiazeng Ding, Tingting Zhu, Yiwen Liu
Summary: This study investigated the mechanism and contribution of microorganisms combined with zero-valent iron (ZVI) in the removal of tetracycline (TC) in wastewater treatment. The results showed that the combination of ZVI and microorganisms improved TC removal by adsorption, chemical reduction, and microbial adsorption. Initially, microorganisms played a major role in the removal process, contributing 80%. However, the inhibitory effect of TC on biological activity and iron encrustation on microbial adsorption sites led to a decrease in TC removal after a certain period of time.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Jingjuan Qiao, Weizhou Jiao, Youzhi Liu
Summary: The study proposed a sequential NZVI-Na2S2O8 process for degrading NB-containing wastewater, achieving high efficiency in NB degradation and total organic carbon removal. Sulfate radicals (SO4 center dot-) and hydroxyl radicals ((OH)-O-center dot) were identified as playing a major role in the process through electron paramagnetic resonance spectroscopy and radical capture experiments.
GREEN ENERGY & ENVIRONMENT
(2021)
Article
Environmental Sciences
Zhengqin Shi, Ping Zhang, Xiaohan Li, Yijie Zheng, Juanxi Huang, Yaxuan Wang, Xiatiao Luo, Gaosheng Zhang, Tangfu Xiao, Jianyou Long, Huosheng Li
Summary: This study investigated the performance and mechanisms of sulfidized zero-valent manganese (SZVMn) for removing thallium (Tl) from wastewater. The results showed that liquid nitrogen modified SZVMn (LSZVMn) had more interior channels and pores than SZVMn, leading to improved adsorption of Tl(I). LSZVMn demonstrated effectiveness and robustness in Tl(I) removal in the presence of co-existing ions up to 0.1 M. The mechanism of Tl(I) removal with SZVMn involved sulfidation-induced precipitation, manganese reduction, surface complexation, and electrostatic attraction.
Review
Environmental Sciences
Yuqian Jia, Shuhui Sun, Shu Wang, Xing Yan, Jieshu Qian, Bingcai Pan
Summary: Elemental phosphorus (P) is crucial for all life forms on earth. Effective management and control of P in natural environments, especially in water bodies, is essential for maintaining ecosystem balance and stability. This review summarizes the current advances in the analysis and removal of different P species in water, aiming to provide a new perspective on P management by integrating speciation analysis with removal strategies. The review also highlights the need for the development of efficient and selective P species-oriented removal strategies based on advanced analytical technologies.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Shu Wang, Jieshu Qian, Bingliang Zhang, Lei Chen, Si Wei, Bingcai Pan
Summary: This study used suspect and nontarget screening techniques to identify organo-phosphate triesters and diesters (tri-OPEs and di-OPEs) in influent and effluent samples from 25 municipal wastewater treatment plants (WWTPs) in China. A total of 33 different OPE molecules were identified, with 11 being detected in wastewater for the first time and 4 being new to the public. Di-OPEs accounted for a significant portion (53% on average) of the total OPEs in all tested samples. Most of the OPEs could not be eliminated after treatment in these WWTPs, and some di-OPEs even accumulated. The ecological risk analysis of OPEs in the effluent highlighted the previously unrecognized exposure risk of emerging OPEs for aquatic living organisms. These findings provide a comprehensive understanding of the environmental relevance of OPEs in WWTPs on a country scale and can guide the upgrade of treatment protocols and governmental regulations in the future.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Agriculture, Dairy & Animal Science
Murillo Ceola Stefano Pereira, Karen A. Beauchemin, Tim A. McAllister, Wenzhu Z. Yang, Katharine M. Wood, Gregory Brent Penner
Summary: Providing physically effective neutral detergent fiber (peNDF), based on forages greater than 4-mm, has a greater effect on rumination time, ruminal fermentation, and ruminal motility compared to measuring undigested neutral detergent fiber (uNDF) alone. However, uNDF alone affects feeding behavior and reduces digestibility. Characterization of peNDF and uNDF can be useful in formulating finishing diets for cattle. Rating: 9/10
JOURNAL OF ANIMAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jianghua Yang, Wenguang Huang, Wentao Zhang, Kunrui Wei, Bingcai Pan, Shujuan Zhang
Summary: Immobilization of enzymes within metal-organic frameworks can enhance their long-term usability, but it often leads to a trade-off between stability and activity. This study shows that the trade-off can be solved by controlling defects through competitive coordination. The biocomposites collected before recrystallization exhibit increased activity and enhanced stability.
Article
Engineering, Environmental
Nanyang Yu, Yiyan Deng, Xuebing Wang, Wei Shi, Dongmei Zhou, Bingcai Pan, Hongxia Yu, Si Wei
Summary: Antimicrobial transformation products (ATPs) in the environment have become a significant concern due to their potential health risks. However, limited research has been conducted on ATPs, and the transformation pathways of most antimicrobials remain unclear. This study used a non-target screening strategy based on molecular networks to identify ATPs in pharmaceutical wastewater and discovered 52 antimicrobials and 49 transformation products. Among them, 30 transformation products were previously unreported in the environment. Based on recent European criteria, the persistence, mobility, and toxicity (PMT) assessment of the transformation products revealed that 47 of them were potential PMT substances. These findings emphasize the need for further research on novel ATPs. A non-target screening strategy combining molecular networks and in silico tools for structure annotation was proposed, which identified novel ATPs with similar PMT characteristics as their parent antimicrobials.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Ningyi Chen, Shuang Wu, Bingjun Pan, Zhichao Yang, Bingcai Pan
Summary: In this study, a colorimetric sensor array based on the shift of the UV-vis spectra of gold nanoparticles (Au NPs) after interaction with Ni(II) species was developed to discriminate different forms of Ni(II) species. The sensor array exhibited high selectivity in detecting and identifying Ni(II) species in simulated and real water samples, with a detection limit ranging from 4.2 to 10.5 μM. This provides a new approach for the development of convenient discrimination methods for other toxic metals.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Qianlin Huang, Puzhen Zhao, Lu Lv, Weiming Zhang, Bingcai Pan
Summary: In this study, monolithic MnO2-O-v/CF catalysts were fabricated by the in situ growth of CuFePBA over copper foam followed by a redox-etching route. The as-synthesized catalyst displayed superior low-temperature activity and robust durability for toluene elimination. The study provides new insights into the development of highly active monolithic catalysts for the low-temperature oxidation of VOCs.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhichao Yang, Yaodan Cui, Bingcai Pan, Joseph J. Pignatello
Summary: Improving the reactivity of Fe(III) for activating peroxymonosulfate is crucial for practical wastewater treatment. The complexes of Fe(III) with biodegradable picolinic acid (PICA) were found to significantly outperform other Fe(III) complexes in activating PMS. The key intermediate in the activation pathway was identified as PICA-FeIII-OOSO3-, and the relative contributions of different species depended on the structure of target compounds.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Laihui Li, Rongjun Gao, Xuebing Wang, Yiyan Deng, Hong Sun, Huijing Sun, Beibei Zhang, Nanyang Yu, Cheng Gu, Bingcai Pan, Hongxia Yu, Si Wei
Summary: This study demonstrates the potential of the SWATH-F method, a non-target fragment-based homologue screening method combined with SWATH-MS deconvolution, for detecting PFASs. Compared to the information-dependent acquisition mode, SWATH-F shows significantly better identification results.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Hualun Li, Jiahao Pan, Yitao Ping, Jialun Su, Moling Fang, Tian Chen, Bingcai Pan, Zhenda Lu
Summary: In this study, a novel approach for selective Li-ion extraction from brine was presented using an LiMn2O4 ion sieve coated with a dense silica layer. The optimized LMO@SiO2 adsorbent demonstrated an exceptional Li+ adsorption capacity, making it a promising candidate for efficient Li+ extraction from brine or other low-concentration Li+ solutions in future applications.
Article
Engineering, Environmental
Yuqian Jia, Chao Shan, Wanyi Fu, Si Wei, Bingcai Pan
Summary: This study investigated the occurrences and fates of 27 legacy and emerging PFASs in textile dyeing wastewater treatment plants. It was found that most conventional processes were inefficient in removing PFASs, especially legacy PFASs. Microbial processes could remove emerging PFASs to some extent but commonly elevated legacy PFAS concentrations. Reverse osmosis (RO) could remove over 90% of PFASs and enrich them into the RO concentrate.
Article
Multidisciplinary Sciences
Rongming Xu, Yuan Kang, Weiming Zhang, Bingcai Pan, Xiwang Zhang
Summary: Inspired by biological potassium ion channels, researchers have developed a biomimetic ion channel membrane using MXene nanosheets and EDTA molecules, which achieves efficient separation of ions. This membrane shows high ion permeability and selectivity, making it significant for sustainable water treatment, resource extraction, and energy storage.
NATURE COMMUNICATIONS
(2023)
Article
Agriculture, Dairy & Animal Science
Murillo Ceola Stefano Pereira, Wenzhu Z. Yang, Karen A. Beauchemin, Timothy A. McAllister, Katharine M. Wood, Gregory B. Penner
Summary: This study evaluated the effects of forages (BarS vs. STR) that differ in the uNDF concentration and FI rate on ruminal fermentation, total tract barrier function, reticulo-ruminal motility, and blood metabolites of beef heifers. The results showed that the forage type and FI rate act independently. Providing forages with greater dietary uNDF can stimulate the frequency of reticulo-ruminal contractions and reduce gastrointestinal permeability with no effect on ruminal pH. Increasing the FI rate stabilized ruminal pH, increased rumination time, stimulated reticulo-ruminal contractions, and decreased indicators of systemic inflammation.
JOURNAL OF ANIMAL SCIENCE
(2023)
Article
Engineering, Environmental
Xiang Gao, Yanyang Zhang, Mengjie Zhou, Xudong Sun, Xinwei She, Jieshu Qian, Bingcai Pan
Summary: In this study, the evolving role of calcium ion (Ca2+) on phosphate removal by nanosized hydrated lanthanum oxides confined in cross-linked polystyrene beads was investigated. The presence of Ca2+ initially enhances the phosphate uptake by the adsorbent, but with ongoing cyclic runs, the role of Ca2+ becomes negative. The formed Ca-P precipitates accumulate on the surface of the nanoparticles and deplete the active adsorptive sites, leading to the formation of irreversible LaPO4 center dot xH(2)O under nanoconfinement.
ACS ES&T ENGINEERING
(2023)
Article
Engineering, Environmental
Ziniu Deng, Sikai Cheng, Nian Xu, Xiaolin Zhang, Bingcai Pan
Summary: Fluoride contamination in groundwater is a global issue, and nanoscale oxides of Zr(IV), Al(III), and Ti(IV) offer a new chance for efficient groundwater purification. In this study, a 150-day field defluoridation using the nanocomposite HZO@D201 was conducted, showing steady reduction of fluoride concentration below 1.0 mg/L without significant change in other common anions coexisting in groundwater. The operational cost for deep defluoridation was estimated much lower than reverse osmosis.
ACS ES&T ENGINEERING
(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.