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The exposure risks associated with pathogens and antibiotic resistance genes in bioaerosol from municipal landfill and surrounding area

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Journal of environmental Sciences 2023年第7期129卷 90-103页

作者： Zhishu Liang Yun Yu Xiaolong Wang Wen Liao Guiying Li Taicheng An guangdong key laboratory of environmental Catalysis and health Risk Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou key laboratory of environmental Catalysis and pollution Control Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China

Pathogenic microbes with antibiotic resistance can thrive on municipal solid waste as nutrients and be aerosolized and transported to vicinities during waste disposal ***,the characterization of pathogenic bioaerosols and assessment of their exposure risks are ***,particle size,concentration,activity,antibiotic resistance,and pathogenicity of airborne microorganisms were assessed in different sectors of a typical *** showed that active sector in downwind direction has the highest bioaerosol level(1234 CFU/m3),while residential area has the highest activity(14.82 mg/L).Botanical deodorizer from mist cannon can effectively remove *** bioaerosols can be inhaled into respiratory system till bronchi with sizes ranging from 2.1−3.3 and 3.3−4.7μ*** bacteria(Bacilli,Bacillus,and Burkholderia-Paraburkholderia)and allergenic fungi(Aspergillus,Cladosporium,and Curvularia)prevailed in *** high abundance of microbial volatile organic compounds(mVOCs)producing bioaerosols were detected,these mVOCs contributed little to odor issues in ***,surrounding areas have higher levels of antibiotic-resistance genes(ARGs)than inner landfill with tetC,acrB,acrF,mdtF,and bacA as dominant *** ARGs were significantly correlated with bacterial community,while environmental parameters mainly influenced fungal *** findings can assist in reducing and preventing respiratory allergy or infection risks in occupational environments relating to waste management.

关键词： Bioaerosol Pathogenic community mVOCs Antibiotic-resistance genes health risk Botanical deodorizer

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Reactor characterization and primary application of a state of art dual-reactor chamber in the investigation of atmospheric photochemical processes

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Journal of environmental Sciences 2020年第12期32卷 161-168页

作者： Hao Luo Guiying Li Jiangyao Chen Yujie Wang Taicheng An guangdong key laboratory of environmental Catalysis and health Risk Control Guangzhou Key Laboratory Environmental Catalysis and Pollution ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China

Increasing attention has been paid to the air pollution more recently. Smog chamber has been proved as a necessary and effective tool to study atmospheric processes, including photochemical smog and haze formation. A novel smog chamber was designed to study the atmospheric photochemical reaction mechanism of typical volatile organic compounds(VOCs) as well as the aging of aerosols. The smog chamber system includes an enclosure equipped with black lights as the light source, two parallel reactors(2 m^3 of each) with separate control of light source and temperature, with a series of coupled instruments for online monitoring of gas phase and particle phase reactants and products. Chamber characterization, including air source stability, effective light intensity, temperature stability, as well as gas phase and particle phase wall losses, were carried out before further research. The results showed that our smog chamber systems developed by other domestic and international groups. It was also observed that the wall loss of aromatic VOCs varied with different functional groups as well as the isomerism. The results of preliminary simulation experiment from styrene-NO_x demonstrated that the chamber can be well utilized to simulate gas-particle conversion progresses in the atmosphere.

关键词： Smog chamber Dual-reactors Volatile organic compounds Ozone formation Secondary organic aerosol

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Effects of triclosan adsorption on intestinal toxicity and resistance gene expression in Xenopus tropicalis with different particle sizes of polystyrene

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Journal of environmental Sciences 2024年第12期146卷 176-185页

作者： Zhuo Dai Zikai Wang Xinying Pan Li Zheng Yanbin Xu Qingxia Qiao guangdong key laboratory of environmental Catalysis and health Risk Control Guangzhou Key Laboratory Environmental Catalysis and Pollution ControlInstitute of Environmental Health and Pollution ControlCollege of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Microplastics(MPs)are commonly found with hydrophobic contaminants in the water column and pose a serious threat to aquatic *** effects of polystyrene microplastics of different particle sizes on the accumulation of triclosan in the gut of Xenopus tropicalis,its toxic effects,and the transmission of resistance genes were *** results showed that co-exposure to polystyrene(PS-MPs)adsorbed with triclosan(TCS)caused the accumulation of triclosan in the intestine with the following accumulation capacity:TCS+5μm PS group>TCS group>TCS+20μm PS group>TCS+0.1μm PS *** experimental groups showed increased intestinal inflammation and antioxidant enzyme activity after 28 days of exposure to PS-MPs and TCS of different particle *** TCS+20μm PS group exhibited the highest upregulated expression of pro-inflammatory factors(IL-10,IL-1β).The TCS+20μm group showed the highest increase in enzyme activity compared to the control ***-MPs and TCS,either alone or together,altered the composition of the intestinal microbial *** addition,the presence of more antibiotic resistance genes than triclosan resistance genes significantly increased the expression of tetracycline resistance and sulfonamide resistance genes,which may be associated with the development of intestinal inflammation and oxidative *** study refines the aquatic ecotoxicity assessment of TCS adsorbed by MPs and provides informative information for the management and control of microplastics and non-antibiotic bacterial inhibitors.

关键词： Polystyrene Triclosan Xenopus-tropicalis Resistance genes Gut community

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Enhanced metronidazole removal by binary-species photoelectrogenic biofilm of microaglae and anoxygenic phototrophic bacteria

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Journal of environmental Sciences 2022年第5期34卷 25-36页

作者： Xubin Zhang Jian Sun Mengmeng Zhao Guangzhou key laboratory of environmental Catalysis and pollution Control Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China

High efficient removal of antibiotics during nutriments recovery for biomass production poses a major technical challenge for photosynthetic microbial biofilm-based wastewater treatment since antibiotics are always co-exist with nutriments in wastewater and resist biodegradation due to their strong biotoxicity and *** this study,we make a first attempt to enhance metronidazole(MNZ)removal from wastewater using electrochemistry-activated binary-species photosynthetic biofilm of Rhodopseudomonas Palustris(***)and Chlorella vulgaris(***)by cultivating them under different applied *** results showed that application of external potentials of-0.3,0 and 0.2 V led to 11,33 and 26-fold acceleration in MNZ removal,respectively,as compared to that of potential *** extent of enhancement in MNZ removal was positively correlated to the intensities of photosynthetic current produced under different externally applied *** binary-species photoelectrogenic biofilm exhibited 18 and 6-fold higher MNZ removal rate than that of single-species of *** and ***,respectively,due to the enhanced metabolic interaction between *** of an external potential of 0V significantly promoted the accumulation of tryptophan and tyrosine-like compounds as well as humic acid in ex-tracellular polymeric substance,whose concentrations were 7.4,7.1 and 2.0-fold higher than those produced at potential free,contributing to accelerated adsorption and reductive and photosensitive degradation of MNZ.

关键词： Photoelectrogenic biofilm Microalgae Anoxygenic phototrophic bacteria Photosynthetic current Antibiotic

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Influence of dissolved organic carbon on multimedia distribution and toxicity of fipronil and its transformation products in lotic waterways

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Journal of environmental Sciences 2023年第8期130卷 52-64页

作者： Weizong Li Hao Hu Fen Liu Huizhen Li Jing You School of Environment and guangdong key laboratory of environmental pollution and health Jinan UniversityGuangzhou 511443China

environmental fate and ecological impacts of fipronil and its transformation products(FIPs)in aquatic environment have caused worldwide attention,however,the influence of dissolved organic carbon(DOC)on multimedia distribution,bioavailability,and toxicity of FIPs in field waterways was largely ***,we collected 11 companion water and sediment samples along a lotic stream in Guangzhou,South *** were ubiquitous with total water concentrations ranging from 1.22 to 43.2 ng/L(14.8±12.9 ng/L)and fipronil sulfone was predominant in both water and *** than 70%of FIPs in aqueous phase were bound to DOC and the KDOC values of FIPs were approximately 1–2 orders of magnitude higher than K_(d-s)/K_(OC),emphasizing the significance of DOC in phase partitioning and transport of FIPs in aquatic *** and sediment samples were more toxic to Chironomus dilutus than Hyallela azteca,and FIPs(especially fipronil sulfone)pronouncedly contributed toxicity to *** units(TU)based on freely dissolved concentrations in water determined by solid phase microextraction significantly improved toxicity estimation of FIPs to the invertebrates compared to TUs based on aqueous *** present study highlights the significance of DOC association on fate and ecological risk of hydrophobic insecticides in lotic ecosystem.

关键词： Hydrophobic organic contaminant Bioavailability Partitioning Aquatic toxicity Passive sampler

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Competing esterification and oligomerization reactions of typical long-chain alcohols to secondary organic aerosol formation

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Journal of environmental Sciences 2023年第4期126卷 103-112页

作者： Jiaxin Wang Xiaohui Ma Yuemeng Ji Yongpeng Ji Yanpeng Gao Yuqi Xiao Guiying Li Taicheng An guangdong key laboratory of environmental Catalysis and health Risk Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthInstitute of Environmental Health and Pollution controlGuangdong University of TechnologyGuangzhou 510006China Guangzhou key laboratory of environmental Catalysis and pollution Control Key Laboratory of City Cluster Environmental Safety and Green DevelopmentSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Organosulfate (OSA) nanoparticles,as secondary organic aerosol (SOA) compositions,are ubiquitous in urban and rural ***,we systemically investigated the mechanisms and kinetics of aqueous-phase reactions of 1-butanol/1-decanol (BOL/DOL) and their roles in the formation of OSA nanoparticles by using quantum chemical and kinetic *** mechanism results show that the aqueous-phase reactions of BOL/DOL start from initial protonation at alcoholic OH^(-)groups to form carbenium ions (CBs),which engage in the subsequent esterification or oligomerization reactions to form OSAs/organosulfites (OSIs) or *** kinetic results reveal that dehydration to form CBs for BOL and DOL reaction systems is the rate-limiting ***,about 18%of CBs occur via oligomerization to dimers,which are difficult to further oligomerize because all reactive sites are *** rate constant of BOL reaction system is one order of magnitude larger than that of DOL reaction system,implying that relative short-chain alcohols are more prone to contribute OSAs/OSIs than long-chain *** results reveal that typical long-chain alcohols contribute SOA formation via esterification rather than oligomerization because OSA/OSI produced by esterification engages in nanoparticle growth through enhancing hygroscopicity.

关键词： Long-chain alcohols Organosulfates Aqueous phase reaction Reaction mechanisms Secondary organic aerosol

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Fast Blood Oxygenation through Hemocompatible Asymmetric Polymer of Intrinsic Microporosity Membranes

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Research 2024年第1期2023卷 261-270页

作者： Xinxi Huang Junping Huang Pengcheng Su Wanbin Li guangdong key laboratory of environmental pollution and health School of EnvironmentJinan UniversityGuangzhou 511443China

Membrane technology has attracted considerable attention for chemical and medical applications,among *** organs play important roles in medical science.A membrane oxygenator,also known as artificial lung,can replenish O_(2) and remove CO_(2) of blood to maintain the metabolism of patients with cardiopulmonary ***,the membrane,a key component,is subjected to inferior gas transport property,leakage propensity,and insufficient *** this study,we report efficient blood oxygenation by using an asymmetric nanoporous membrane that is fabricated using the classic nonsolvent-induced phase separation method for polymer of intrinsic *** intrinsic superhydrophobic nanopores and asymmetric configuration endow the membrane with water impermeability and gas ultrapermeability,up to 3,500 and 1,100 gas permeation units for CO_(2) and O_(2),***,the rational hydrophobic–hydrophilic nature,electronegativity,and smoothness of the surface enable the substantially restricted protein adsorption,platelet adhesion and activation,hemolysis,and thrombosis for the ***,during blood oxygenation,the asymmetric nanoporous membrane shows no thrombus formation and plasma leakage and exhibits fast O_(2) and CO_(2) transport processes with exchange rates of 20 to 60 and 100 to 350 ml m^(−2) min^(−1),respectively,which are 2 to 6 times higher than those of conventional *** concepts reported here offer an alternative route to fabricate high-performance membranes and expand the possibilities of nanoporous materials for membrane-based artificial organs.

关键词： porosity asymmetric Oxygen

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Mechanisms of isomerization and hydration reactions of typicalβ-diketone at the air-droplet interface

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Journal of environmental Sciences 2024年第7期141卷 225-234页

作者： Yuemeng Ji Weiyong Luo Qiuju Shi Xiaohui Ma Ziqi Wu Weina Zhang Yanpeng Gao Taicheng An guangdong-Hong Kong-Macao Joint laboratory for Contaminants Exposure and health Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlInstitute Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou key laboratory of environmental Catalysis and pollution Control Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of EducationSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Acetylacetone(AcAc)is a typical class ofβ-diketones with broad industrial applications due to the property of the keto-enol isomers,but its isomerization and chemical reactions at the air-droplet interface are still ***,using combined molecular dynamics and quantum chemistry methods,the heterogeneous chemistry of AcAc at the air-droplet interface was investigated,including the attraction of AcAc isomers by the droplets,the distribution of isomers at the air-droplet interface,and the hydration reactions of isomers at the air-droplet *** results reveal that the preferential orientation of two AcAc isomers(keto-and enol-AcAc)to accumulate and accommodate at the acidic air-droplet *** isomerization of two AcAc isomers at the acidic air-droplet interface is more favorable than that at the neutral air-droplet interface because the“water bridge”structure is destroyed by H_(3)O^(+),especially for the isomerization from keto-Ac Ac to *** the acidic air-droplet interface,the carbonyl or hydroxyl O-atoms of two AcAc isomers display an energetical preference to ***-diol is the dominant products to accumulate at the air-droplet interface,and excessive keto-diol can enter the droplet interior to engage in the *** photooxidation reaction of AcAc will increase the acidity of the air-droplet interface,which indirectly facilitate the uptake and formation of more *** results provide an insight into the heterogeneous chemistry ofβ-diketones and their influence on the environment.

关键词： Acetylacetone Air-droplet interface Theoretical simulation Isomerization Hydration reaction mechanism

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A new method of simultaneous determination of atmospheric amines in gaseous and particulate phases by gas chromatography-mass spectrometry

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Journal of environmental Sciences 2022年第4期34卷 401-411页

作者： Yifei Chen Qinhao Lin Guiying Li Taicheng An guangdong-Hong Kong-Macao Joint laboratory for Contaminants Exposure and health Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlInstitute of Environmental Health and Pollution controlGuangdong University of TechnologyGuangzhou 510006China Guangzhou key laboratory of environmental Catalysis and pollution Control Key Laboratory of City Cluster Environmental Safety and Green Development(Department of Education)School of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China Chemistry and Chemical Engineering guangdong laboratory Shantou 515031China

As more attention is being paid to the characteristics of atmospheric amines,there is also an increasing demand for reliable detection ***,a method was developed for simultaneous detection of atmospheric amines in both gaseous and particulate phases using gas chromatography-mass spectrometry(GC-MS).The amine samples were collected with and without phosphoric acid filters,followed by derivatization with benzenesulfonyl chloride under alkaline condition prior to GC-MS ***,the method was optimized and validated for determining 14 standard *** detection limits ranged from0.0408-0.421μg/mL(for gaseous samples)and 0.163-1.69μg/mL(for particulate samples),*** obtained recoveries ranged from 68.8%-180%and the relative standard deviation was less than 30%,indicating high precision and good reliability of the *** amines were simultaneously detected in gaseous and particulate samples in an industrial park using the developed method ***,dimethylamine and diethylamine together accounted for 76.7%and 75.6%of particulate and gaseous samples,*** comparing the measured and predicted values of gas-particle partition fractions,it was found that absorption process of aqueous phase played a more important role in the gas-partition of amines than physical ***,the reaction between unprotonated amines and acid(aq.)in water phase likely promoted water *** measured partition fraction of dibutylamine was likely due to the reaction with gaseous *** developed method would help provide a deeper understanding of gas-particle partitioning as well as atmospheric evolution of amines.

关键词： Atmospheric amines Determination method Simultaneous determination Gaseous and particulate phases Gas chromatography-mass spectrometry

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Photo-piezoelectric synergistic degradation of typical volatile organic compounds on BaTiO_(3)

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Chinese Chemical Letters 2022年第1期33卷 410-414页

作者： Qin Liu Weina Zhao Zhimin Ao Taicheng An Guangzhou key laboratory of environmental Catalysis and pollution Control Guangdong Key Laboratory of Environmental Catalysis and Health Risk ControlSchool of Environmental Science and EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China

Explore the photo-piezoelectric synergistic micro-mechanism by density functional theory(DFT)calculations at the electronic and atomic level is *** this work,to understand the synergistic mechanism,atomic and electronic properties of typical piezoelectric and photocatalytic material BaTiO_(3)were initially investigated with different ***,the adsorption of volatile organic compounds(VOCs)on the BaTiO_(3)(001)surface was determined during the piezoelectric *** addition,the relationship between deformation ratio,the electronic structure and adsorption energy was understood in the deformation ratio range of 7%-12%for the optimal catalytic *** results of charge density differences and Born effective charge reveal the synergistic mechanism of piezoelectric *** built-in electric field formed by polarization results in the enhanced separation of charges,which makes the surface charges aggregation,enhancing the adsorption of VOCs,and benefiting the subsequent photocatalytic *** work can provide significant theoretical guidance for the piezoelectric photocatalytic degradation of pollutants with the optimal strain range.

关键词： Photocatalysis Photo-piezoelectric synergistic Polarization Charge separation BaTiO_(3) Volatile organic compounds(VOCs)

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