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Exploration of the interaction mechanism in the synergistic degradation of benzene and toluene over MnCoO_(x) catalysts

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Frontiers of environmental Science & engineering 2025年第2期19卷 119-134页

作者： Xin Xing Zhe Li Yixin Wang Zonghao Tian Jie Cheng Zhengping Hao College of Environment and Resources Taiyuan University of Science and TechnologyTaiyuan 030024China National Engineering Laboratory for VOCs Pollution Control Material&Technology Research Center for Environmental Material and Pollution Control TechnologyUniversity of Chinese Academy of SciencesBeijing 101408China

The catalytic degradation of single-component VOCs has been widely ***,several types of VOCs may be present in an actual industrial emission *** synergistic removal of multicomponent VOCs is currently a popular research ***,Mn–Co samples with various Mn/Co ratios(1:2,1:1,and 2:1)were successfully prepared,and the catalytic oxidation performance characteristics toward benzene and toluene over these samples under single and binary VOC oxidation conditions were *** with pure MnO_(x) and CoO_(x),the prepared Co–Mn composite oxide samples exhibited significantly improved catalytic ***_(x) and MnCo_(2)O_(x) showed optimum catalytic performance,with 100%benzene and 100%toluene conversion in the mixtures at 300 and 350°C,100%CO_(2) *** methods were employed to elucidate the relevance of the catalytic activity to the structures,acidity,redox properties,Mn–Co valence state and oxygen ***,the interactions between benzene and toluene during their synergistic degradation,as well as the intermediates and potential reaction mechanisms of their simultaneous elimination,were *** Mn–Co oxide compounds for cooperative catalytic oxidation of benzene and toluene represents a viable and effective technique for the practical and synergist elimination of multicomponent VOCs.

关键词： Mn-Co oxides Synergetic catalytic oxidation Benzene and toluene Reaction mechanism

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Carbonyl-amine condensation coupled ozonolysis of dipropylamine and styrene:Decay kinetics,reaction mechanism,secondary organic aerosol formation and cytotoxicity

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Journal of environmental Sciences 2025年第3期149卷 444-455页

作者： Wanying Li Jiangyao Chen Qinhao Lin Yuemeng Ji Taicheng An Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Oxidation of organic amines(OAs)or aromatic hydrocarbons(AHs)produces carbonyls,which further react with OAs to form carbonyl-amine condensation products,threatening environmental quality and human ***,there is still a lack of systematic understanding of the carbonyl-amine condensation reaction processes of OAs or between OAs and AHs,and subsequent environmental health *** work systematically investigated the carbonyl-amine condensation coupled ozonolysis kinetics,reaction mechanism,secondary organic aerosol(SOA)formation and cytotoxicity fromthe mixture of dipropylamine(DPA)and styrene(STY)by a combined method of productmass spectrometry identification,particle property analysis and cell exposure *** results from ozonolysis of DPA and STY mixture revealed that STY inhibited the ozonolysis of DPA to different degrees to accelerate its own decay *** barycenter of carbonyl-amine condensation reactionswas shifted from inside of DPA to between DPA and STY,which accelerated STY ozonolysis,but slowed down DPA *** the first time,ozonolysis of DPA and STY mixture to complex carbonyl-amine condensation products through the reactions of DPA with its carbonyl products,DPA with STY’s carbonyl products and DPA’s bond breakage product with STY’s carbonyl products was *** condensation products significantly contributed to the formation and growth of *** SOA containing particulate carbonyl-amine condensation products showed definite *** findings are helpful to deeply and comprehensively understand the transformation,fate and environmental health effects of mixed organics in atmospheric environment.

关键词： Organic amines(OAs) Aromatic hydrocarbons(AHs) Coupled ozonolysis Carbonyl-amine condensation Secondary pollution Toxicity assessment

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Green disposal of waste smartphone protective film:Efficiency,mechanism,bench-scale test and secondary waste reutilization

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Journal of environmental Sciences 2025年第5期151卷 692-702页

作者： Jiangyao Chen Shunyu Ding Chenxu Gao Canhui Chen Taicheng An Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment EngineeringInstitute of Environmental Health and Pollution ControlGuangdong University of TechnologyGuangzhou 510006China Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and HealthSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

The manufacture and obsolescence of smartphones produce numerous waste plastic accessories(e.g.,waste smartphone protective film(WSPF)),possessing immense potential for ***,available recycling technologies have limitations such as substrate damage and secondary pollutant *** present study aimed to develop a green disposal method that not only recycled polyethylene terephthalate(PET)from WSPF,but also reused the stripped polyacrylate(PAA)adhesive as an adsorbent to reduce solid waste *** the WSPF was treated in 1 mol/L NaOH solution at 90°C,the PAA hydrolyzed to two main by-products of 1-butanol and 2-ethylhexanol,weakening the binding strength between PAA and PET and then efficient separation of *** bench-scale test revealed that over 97.2%of detachment efficiency toward PAA was achieved during continuous treatment of 17 batches of WSPF(200 g for each)without supplement of NaOH and generation of ***,the economic evaluation indicated that the recycling method would generate a net profit margin of 647%for the second year without considering the incurrence of new cost and ***,the pyrolysis of waste PAA enabled its conversion into potential adsorbent,which showed 2 to 4 times enhanced adsorption capacity toward styrene and ethyl acetate after modification with NaOH *** study provides a green method for recycling waste plastics and inspires a referable solution for solid waste treatment in the smartphone industry.

关键词： Smartphone accessory Waste protective film Green recycle Polyethylene terephthalate Polyacrylate Adsorbent

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research progress on secondary formation,photosensitive reaction mechanism and human health effects of chromophoric brown carbon

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Journal of environmental Sciences 2025年第5期151卷 310-330页

作者： Baihang Chen Jiangyao Chen 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 Guangdong Technology Research Center for Photocatalytic Technology Integration and Equipment Engineering Guangzhou Key Laboratory of Environmental Catalysis and Pollution ControlSchool of Environmental Science and EngineeringGuangdong University of TechnologyGuangzhou 510006China

Brown carbon(BrC)has attracted widespread attention because of its strong absorption of solar radiation in the ultraviolet-visible wavelength range,which causes adverse impacts on human ***,BrC was a physically defined class of ***,current research has gradually shifted towards the identification of its chemical groups,because its light-absorbing capability,chemical properties and health effects mainly depend on the chemical composition of its ***,this review mainly focuses on the chemical understanding of BrC based on chromophores,and the secondary formation mechanism of chromophores,photosensitized reactions,and human health effects of BrC were detailly ***,BrC chromophores are divided into five categories:nitrogen-heterocycles,nitrogen-chain,aromatic species,oligomers and sulfur-containing organic *** chromophore precursor species exhibit variations,and their formation mechanisms are also ***,BrC can trigger the production of secondary organic aerosol(SOA)precursors or cause SOA growth because BrC is an important component of light-absorbing particles formed during incomplete combustion of biomass and fossil fuels,potentially exerting adverse effects on human ***,developing sufficiently separated methods for BrC and refining algorithms and machine learning can lead to a more effective understanding of the chemical composition of chromophores,thus enabling better evaluation of the atmospheric effects and health impacts of *** all,this review provides new insights into the categories of BrC chromophores and new advance in secondary formation mechanisms,photosensitized reactions,and human health effects on the basis of chemical structures.

关键词： Brown carbon Constituent characteristics Secondary formation mechanism Photosensitive Human health effects

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Smoke and NO_(x)emission characteristics of in-use construction machinery base on substantial field measurement:A case study in Beijing,China

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Journal of environmental Sciences 2025年第3期149卷 386-393页

作者： Huawei Yi Yangyang Cui Lijun Zhu Yan Shen Han Li Guanghan Huang Linzhen Qu Dongdong Guo Lei Nie Yifeng Xue National Engineering Research Center of Urban Environmental Pollution Control Beijing Municipal Research Institute of Eco-Environmental ProtectionBeijing 100037China Beijing Vehicle Emission Management Affairs Centre Beijing 100176China

To understand the smoke level and NO_(x)emission characteristics of in-use construction machinery in Beijing,we selected 905 construction machines in Beijing from August 2022 to April 2023 to monitor the emission level of smoke and NO_(x).The exhaust smoke level and excessive emission situation of different machinery types were identified,and their NO_(x)emission levels were monitored according to the free acceleration *** investigated the correlation of NO_(x)and smoke emission,and proposed suggestions for controlling pollution discharge from construction machinery in the *** results show that the exhaust smoke level was 0–2.62 m^(−1),followed a log-normal distribution(μ=-1.73,δ=1.09,R^(2)=0.99),with a 5.64%exceedance *** observed amongmachinery types,with low-power engine forklifts showing higher smoke *** NO_(x)emission range was 71–1516 ppm,followed a normal distribution(μ=565.54,δ=309.51,R^(2)=0.83).Differences among machinery types were relatively *** rated net power had the most significant impact on NO_(x)***,NO_(x)emissions from construction machinery need further ***,we found a weak negative correlation(p<0.05)between the emission level of smoke and NO_(x),that is the synergic emission reduction effect is poor,emphasizing the need for NO_(x)emission *** the future,the oversight in Beijing should prioritize phasing out ChinaⅠand ChinaⅡmachinery,and monitor emissions from highpower engine ChinaⅢmachinery.

关键词： Fuel-oil construction machinery Smoke NO_(x) Emission level Regulatory suggestion

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Adsorption of typical gasoline vapor emitted from service stations by commercial activated carbon:static/dynamic adsorption and kinetics simulation

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Frontiers of environmental Science & engineering 2025年第3期19卷 87-98页

作者： Wei Hu Quanming Liang Dan Lu Beibei Li Biqi Ren Qingye Luan Jia Liu Wenjun Liang Yuhu Huang National Engineering Research Center of Urban Environmental Pollution Control Beijing Key Laboratory of Urban Atmospheric Volatile Organic Compounds Control Technology and ApplicationsBeijing Municipal Research Institute of Eco-Environmental ProtectionBeijing 100037China Key Laboratory of Beijing on Regional Air Pollution Control Faculty of Environment and LifeBeijing University of TechnologyBeijing 100124China Institute of Urban Safety and Environmental Science Beijing Academy of Science and TechnologyBeijing 100054China

Gasoline vapor emissions from service stations significantly affect urban *** the research on the mechanisms and effectiveness of gasoline vapor removal is limited,this study innovatively investigates the static and dynamic adsorption of xylene—a typical gasoline vapor and one of the most active secondary organic aerosol(SOA)species—by commercial activated carbon(AC).The results showed that the saturation static adsorption capacity(Q_(e))of 12 ACs varied from 0.9 to 870.7 mg/g,which correlated with the specific surface area(SSA)and pore *** them,11#and 12#ACs were identified as the most effective adsorbents for typical gasoline vapor *** maximum dynamic Q_(e) increased from 301.5 to 414.3 mg/g when the initial xylene concentration rose from 918 to 2008 mg/m^(3) for 11#AC,and from 201.4 to 406.2 mg/g when the initial xylene concentration increased from 589 to 2120 mg/m^(3) for 12#*** findings implied a direct correlation between higher initial xylene concentrations and greater dynamic Q_(e) values,with static Q_(e) values surpassing dynamic *** adsorption kinetics simulation were analyzed by the pseudo-first-order(PFO)and pseudo-second-order(PSO)*** kinetics results demonstrated that the PFO was more effective in characterizing the adsorption of xylene onto ACs(R2>0.989),indicating that the adsorption of typical gasoline vapor by ACs primarily involves physical *** findings of static/dynamic adsorption and kinetics provide valuable guidance for practical applications of gasoline vapor removal in service stations.

关键词： Activated carbon Gasoline vapor Xylene Dynamic adsorption Breakthrough curve

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Soil holobiont interplay and its role in protecting plants against salinity stress

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Pedosphere 2025年第1期35卷 97-115页

作者： Fakher ABBAS Jianjun DU Haibin CHEN Muhammad AZEEM Ruqin FAN Guangdong Engineering and Technology Center for Environmental Pollution Prevention and Control in Agricultural Producing Areas College of Environmental Science and EngineeringZhongkai University of Agriculture and EngineeringGuangzhou 510225China Institute of Soil and Environmental Sciences PMAS-Arid Agriculture University RawalpindiRawalpindi 46000Pakistan

Salinity poses a significant challenge to global agricultural productivity,impacting plant growth,yield,soil fertility,and the composition of soil microbial ***,salinity has a significant impact in shifting soil microbial communities and their functional ***,we explored and analyzed the intricate relationships among plant-associated microbes/microbiome,including plant growth-promoting bacteria,arbuscular mycorrhizal fungi(AMF),archaea,and viruses in alleviating salinity stress in *** this review,we have highlighted that salinity stress selectively enhances the growth of certain microbes such as Gammaproteobacteria,Bacteroidetes,Firmicutes,Acidobacteria,Euryarchaeota,Thaumarchaeota,Crenarchaeota,and lysogenic viruses,while decreasing the abundances of others(Alphaproteobacteria and Betaproteobacteria)and AMF root *** microbes regulate water and nutrient uptake,decrease ionic and osmotic toxicity,enhance the syntheses of antioxidant enzymes(catalase and glutathione S-transferases)and osmolytes(erythrose and galactinol),increase phytohormone(indole-3 acetic acid)production,and activate salinity stress tolerance genes(SOD,APX,and SKOR)in ***,we meticulously examined the significance of soil microbiome and the need for multidisciplinary omics studies on the changes in soil microbiome composition and the relationships of synergistic holobiont in mitigating salinity stress in *** studies will provide insights into the use of microbial components as a sustainable and eco-friendly approach to modulate salinity stress and enhance agricultural productivity.

关键词： agricultural productivity microbial communities multiomics approaches plant-microbe interaction stress tolerance

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Soil aggregate stability assessment based on ultrasonic agitation:Limitations and recommendations after sixty years(1964–2023)

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Pedosphere 2025年第1期35卷 67-83页

Soil aggregate stability is a fundamental measure for evaluating soil *** numerous tests exist for assessing soil aggregate stability,ultrasonic agitation(UA)is widely recognized for its ***,a significant limitation of UA is the lack of standardized methodologies and stability assessment criteria,resulting in inconsistency and incomparability across *** critical factors influence the assessment of soil aggregate stability,including sample preparation(e.g.,drying,sieving,and settling duration),initial and final aggregate size classes,the definition of final energy form and its calculation,variations in instrumentation and laboratory procedures,and the absence of standardized *** some stability methods,UA produces a broad range of results,with dispersion energy varying significantly(0.5–13440 J g^(-1))across different soil and aggregate types due to divergent procedural *** settings encompass factors such as initial power and amplitude,temperature fluctuation,soil/water ratio,probe specification(diameter and insertion depth),and the choice of liquid used during the ***,UA faces challenges related to limited reproducibility,raising doubts about its status as a standard stability assessment *** address these issues,standardization through predefined procedures and stability criteria has the potential to transform UA into a precise and widely accepted method for both qualitative and quantitative assessments of soil *** this comprehensive review,we outline the challenges in standardizing UA,elucidate the factors contributing to dispersion energy variation,and offer practical recommendations to establish standardized protocols for UA in soil aggregate stability assessments.

关键词： aggregate cavitation dispersion energy particle size distribution soil structure stability method ultrasonication

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Degradation of carbamazepine by the UVA-LED_(365)/ClO_(2)/NaClO process:Kinetics,mechanisms and DBPs yield

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Journal of environmental Sciences 2025年第2期148卷 399-408页

作者： Chenyan Hu Yihui Wu Zhengyu Dong Ziyi Dong Shengjie Ji Lili Hu Xinyu Yang Hao Liu College of Environmental and Chemical Engineering Shanghai Engineering Research Center of EnergySaving in Heat Exchange SystemsShanghai University of Electric PowerShanghai 200090China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

A mixed oxidant of chlorine dioxide(ClO_(2))and NaClO was often used in water treatment.A novel UVA-LED(_(365) nm)-activated mixed ClO_(2)/NaClO process was proposed for the degradation of micropollutants in this ***(CBZ)was selected as the target *** with the UVA_(365)/ClO_(2) process,the UVA_(365)/ClO_(2)/NaClO process can improve the degradation of CBZ,with the rate constant increasing from 2.11×10^(−4) sec^(−1) to 2.74×10^(−4) sec^(−1).In addition,the consumption of oxidants in the UVA_(365)/ClO_(2)/NaClO process(73.67%)can also be lower than that of UVA_(365)/NaClO(86.42%).When the NaClO ratio increased,both the degradation efficiency of CBZ and the consumption of oxidants can increase in the UVA_(365)/ClO_(2)/NaClO *** solution pH can affect the contribution of NaClO in the total oxidant *** the pH range of 6.0-8.0,the combination process can generate more active species to promote the degradation of *** change of active species with oxidant molar ratio was investigated in the UVA_(365)/ClO_(2)/NaClO *** ClO_(2) acted as the main oxidant,HO·and Cl·were the main active species,while when NaClO was the main oxidant,ClO·played a role in the *** chloride ion(Cl^(-)),bicarbonate ion(HCO_(3)^(-)),and nitrate ion(NO_(3)^(-))can promote the reaction *** the concentration of NaClO in the reaction solution increased,the generation of chlorates will *** UVA_(365)/ClO_(2)/NaClO process can effectively control the formation of volatile disinfection by-products(DBPs),and with the increase of ClO_(2) dosage,the formation of DBPs can also decrease.

关键词： UVA Chlorine dioxide(ClO_(2)) NaClO Carbamazepine(CBZ) Disinfection by-products

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Preparation process optimization and study on mechanical property of food waste/fly ash/acrylamide composite hydrogel

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Bulletin of Materials Science 2025年第2期48卷 1-13页

作者： Huang, Yu Dong, Tingting Zhang, Xing Zhao, Jingyi Zhao, Binkai Qin, Mingyan Deng, Liwei Li, Yalin School of Civil Engineering Architecture and Environment Hubei University of Technology Wuhan430068 China School of College of Environmental and Biological Engineering Henan University of Engineering Zhengzhou451191 China National Engineering Research Center of Advanced Technology and Equipment for Water Environment Pollution Monitoring Wuhan430068 China

Resource utilization of food waste and fly ash has been a significant challenge for managing the environment, building a ‘waste-free city’ and achieving the ‘dual-carbon’ goal. In the present study, a high-strength food waste/fly ash/acrylamide composite hydrogel was developed by combining food waste and fly ash into functionalized particles using free radical cross-linking polymerization, with acrylamide used as the monomer, N, N′-methylene bisacrylamide as the cross-linking agent and sodium persulphate as the initiator. After one-factor experiments by changing the dosages of acrylamide, N, N′-methylene bisacrylamide, sodium persulphate, fly ash and polymerization temperature, the process conditions for the hydrogel to have the optimum mechanical property were obtained using response surface optimization. The experimental results showed that Young’s modulus of the produced hydrogels was as high as 2913 kPa at the dosages of acrylamide, N, N′-methylene bisacrylamide, sodium persulphate and fly ash of 4.349, 0.012, 0.540 and 1.181 g, respectively. Subsequently, the morphology and structure of the hydrogels were characterized using a Fourier transform infrared spectrometer, scanning electron microscope and X-ray diffractometer. The results showed that the interactions among polymer chains in the network structure of the hydrogel, the filling of fly ash and the hydrogen bonding combined to give the hydrogel excellent mechanical property. Meanwhile, Young’s modulus of composite hydrogel increased by 30.16% compared to that of the single-phase food waste hydrogel. © Indian Academy of Sciences 2025.

关键词： Hydroelasticity

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