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Electrostatic removal of ultrafine carbon black with square-grooved co.lecting plates:Insights for capturing black carbon emitted from ships

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Journal of environmental Sciences 2024年第2期136卷 559-569页

作者： Zhicheng Wu YifanWang Lingyu Shao Hao Zhang Haobo Dai Haidong Fan Chenghang Zheng Xiang Gao State Key Lab of Clean Energy Utilization State Environmental Protection Engineering Center for Coal-Fired Air Pollution ControlZhejiang UniversityHangzhou 310027China Department of Earth and environmental Sciences University of ManchesterOxford RoadUnited Kingdom zhejiang tiandi environmental protection Engineering co. Ltd.Hangzhou 310012China Baima Lake Laboratory(zhejiang Provincial Laboratory of Energy and Carbon Neutrality) Hangzhou 310000China

Ships and other mobile pollution sources emitted massive ultrafine and low-resistivity particles co.taining black carbon(BC),which were harmful to human health and were difficult to capture by co.ventional electrostatic precipitators(ESPs).In this study,nanoscale carbon black was adopted as simulated particles(SP)with similar physico.hemical properties for black carbon emitted from ships(SP-BC)to investigate the feasibility of using an ESP with square-grooved co.lecting plates for the removal of SP-BC at low *** increased applied voltage significantly improved the total co.lection of SP-BC whereas may also promote the co.version of relatively larger particle size SP-BC into nano-size below *** outlet number co.centration of SP-BC under 27 kV at 130℃was three times that of the *** the reduction of the flow rate co.ld strengthen the capture of SP-BC below20 nm,and under the co.bined action of low flow rate and maximum applied voltage,the co.lection efficiency of 20-100 nm SP-BC co.ld exceed 90%.In addition,the escape and capture characteristics of SP-BC under long-term rapping were *** square-grooved co.lecting plate co.ld effectively restrain the re-entrainment of co.lected SP-BC generated by rapping,and the nanoscale SP-BC was trapped in the grooves after *** results co.ld provide insights into the profound removal of massive nanoscale black carbon emissions from mobile sources.

关键词： Simulated ship black carbon Electrostatic removal Square-grooved co.lecting plate Long-term rapping

Reco.ery of Li, Ni, co.and Mn from spent lithium-ion batteries assisted by organic acids: Process optimization and leaching mechanism

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International Journal of Minerals,Metallurgy and Materials 2024年第3期31卷 518-530页

作者： Liuyi Ren Bo Liu Shenxu Bao Wei Ding Yimin Zhang Xiaochuan Hou Chao Lin Bo Chen School of Resources and environmental Engineering Wuhan University of TechnologyWuhan 430070China State environmental protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution co.trol Wuhan University of Science and TechnologyWuhan 430081China zhejiang New Era Zhongneng Recycling technology co. LtdShaoxing 312000China Shenzhen Water Planning&Design Institute co. LtdShenzhen 518000China

The proper recycling of spent lithium-ion batteries(LIBs)can promote the reco.ery and utilization of valuable resources,while also negative environmental effects resulting from the presence of toxic and hazardous *** this study,a new environmentally friendly hydro-metallurgical process was proposed for leaching lithium(Li),nickel(Ni),co.alt(co.,and manganese(Mn)from spent LIBs using sulfuric acid with citric acid as a *** effects of the co.centration of sulfuric acid,the leaching temperature,the leaching time,the solid-liquid ratio,and the reducing agent dosage on the leaching behavior of the above elements were *** parameters were optimized using response surface methodology(RSM)to maximize the reco.ery of metals from spent *** maxim-um reco.ery efficiencies of Li,Ni,co.and Mn can reach 99.08%,98.76%,98.33%,and 97.63%.under the optimized co.ditions(the sulfuric acid co.centration was 1.16 mol/L,the citric acid dosage was 15wt%,the solid-liquid ratio was 40 g/L,and the temperature was 83℃ for 120 min),*** was found that in the co.laborative leaching process of sulfuric acid and citric acid,the citric acid initially provided strong reducing co.(2)^(-),and the transition metal ions in the high state underwent a reduction reaction to produce transition metal ions in the low ***,citric acid can also act as a proton donor and chelate with lower-priced transition metal ions,thus speeding up the dissolution process.

关键词： spent lithium-ion batteries leaching response surface methodology sulfuric acid citric acid

A global perspective on microbial risk factors in effluents of wastewater treatment plants

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Journal of environmental Sciences 2024年第4期138卷 227-235页

作者： Kejing Chen Jinsong Liang Yuhan Wang Yechen Tao Yun Lu Aijie Wang School of Civil and environmental Engineering Harbin Institute of TechnologyShenzhen 518055China Shenzhen Guohuan environmental protection technology Development co. LTD.Shenzhen 518055China State Key Joint Laboratory of environmental Simulation and Pollution co.trol State Environmental Protection Key Laboratory of Microorganism Application and Risk ControlSchool of EnvironmentTsinghua UniversityBeijing 100084China

Effective monitoring and management of microbial risk factors in wastewater treatment plants(WWTPs)effluents require a co.prehensive investigation of these risks.A global survey on microbial risk factors in WWTP effluents co.ld reveal important insights into their risk *** study aims to explore the abundance and types of antibiotic resistance genes(ARGs),virulence factor genes(VFGs),the vector of ARG/VFG,and dominant pathogens in global WWTP *** co.lected 113 metagenomes of WWTP effluents from the Sequence Read Archive of the National Center for Biotechnology Information and characterized the microbial risk *** results showed that multidrug resistance was the dominant ARG type,while offensive virulence factors were the most abundant type of *** most dominant types of ARGs in the vector of plasmid and phage were both aminoglyco.ide resistance,which is co.cerning as aminoglyco.ides are often a last resort for treating multi-resistant *** baumannii was the most dominant pathogen,rather than Escherichia co.i,and a weak negative co.relation between Escherichia co.i and two other dominant pathogens(Acinetobacter baumannii and Bacteroides uniformis)suggests that using Escherichia co.i as a biological indicator for all pathogens in WWTP effluents may not be *** Getah virus was the most dominant virus found in global WWTP *** study presents a co.prehensive global-scale investigation of microbial risk factors in WWTP effluents,providing valuable insights into the potential risks associated with WWTP effluents and co.tributing to the monitoring and co.trol of these risks.

关键词： Wastewater treatment plant Microbial risk factor Effluent Pathogen Antibiotic resistance gene Virulence factor gene

Atomization characteristics of pyrolysis oil derived from waste tires

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Waste Disposal and Sustainable Energy 2024年第1期6卷 39-52页

作者： Hong Feng Zhitong Yin Qin Hong Yiming Hu Lintao Liu Jun Wang Qunxing Huang Yonggang Zhou ZJMI environmental Energy co. LtdHangzhou310003China Tongxiang Taiaisi environmental protection Energy co. Ltd.Jiaxing314500China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou310027China Key Laboratory of Clean Energy and Carbon Neutrality of zhejiang Province Jiaxing Research InstituteZhejiang UniversityJiaxing314031China

The atomization characteristics play a key role in the highly efficient co.bustion of pyrolysis oil derived from waste *** this study,the fuel properties of tire pyrolysis oil(TPO)were initially studied,and then a high-speed camera and a phase Doppler particle analyzer were employed to characterize the atomization feature of *** influence of pressure and nozzle orifice diameter on atomization characteristics such as spray angle,droplet velocity,and droplet size distribution was *** results showed that TPO had a high calorific value of about 43.6 MJ/kg and a low visco.ity of 3.84×10^(–6)m^(2)/s at 40℃,which made it have the potential to be used as an alternative *** pressure expanded the spray angle and extended the spray in both the axial and radial *** increasing pressure,spray angle and droplet velocity raised,and the increase in crushing effect of air reduced the Sauter mean diameter(SMD)of the *** obtain proper atomization quality for co.bustion,the pressure is expected to be higher than 1.25 *** increasing nozzle orifice diameter,droplet velocity increased,and the SMD of the droplets increased as well due to weakened crushing effect of the ***,the pressure must be increased to maintain the atomization quality when using a nozzle with a larger *** to the lower visco.ity,the velocity and particle size distribution of TPO droplets after atomization were smaller than those of diesel *** extremely small carbon black co.tained in TPO also co.tributed to the breaking of droplets and played a certain role in the size reduction of the oil droplets,but it may cause the risk of nozzle *** summary,TPO showed great atomization characteristics for alternative fuel applications.

关键词： Pyrolysis oil Atomization characteristics Spray angle Droplet velocity Droplet size distribution

Green synthesis of ZSM-5 using silica fume and catalytic co.cracking of lignin and plastics for production of monocyclic aromatics

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Chinese Journal of Chemical Engineering 2024年第1期65卷 92-105页

作者： Hongbing Fu Yufei Gu Tianhua Gao Fuwei Li Hengshuo Gu Hucheng Ge Yuke Liu Zhixia Li Hongfei Lin Jiangfei Cao School of Chemistry and Chemical Engineering Guangxi UniversityNanning 530004China Guangxi Bossco.environmental protection technology co. Ltd.Nanning 530007China School of environmental and Chemical Engineering Zhaoqing UniversityZhaoqing 526000China

ZSM-5 with hierarchical pore structure was synthesized by a simple two-step hydrothermal crystallization from silica fume without using any organic ammonium *** synthesized ZSM-5 were oval shaped particles with a particle size about 2.0 μm and weak acid-dominated with proper Brønsted(B)and Lewis(L)acid *** ZSM-5 was used for catalytic co.cracking of n-octane and guaiaco.,lowdensity polyethylene(LDPE)and alkali lignin(AL)to enhance the production of benzene,toluene,ethylbenzene and xylene(BTEX).The most significant synergistic effect occurred at n-octane/guaiaco. at 1:1 and LDPE/AL at 1:3,under the co.dition,the achieved BTEX selectivity were 24%and 33%(mass)higher than the calculated values(weighted average).The highest BTEX selectivity reached 88.5%,which was 3.7%and 54.2%higher than those from individual cracking LDPE and *** synthesized ZSM-5 exhibited superior catalytic performance co.pared to the co.mercial ZSM-5,indicating potential application prospect.

关键词： Silica fume ZSM-5 Catalytic co.cracking Plastics Lignin

Reducing children’s exposure to di(2-ethylhexyl)phthalate in homes and kindergartens in China:Impact on lifetime cancer risks and burden of disease

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Building Simulation 2024年第3期17卷 431-440页

作者： Dongsheng Tao Wen Sun Donghui Mo Yonghui Lin Wei Lv Daniel Mmereki Yousheng Xu Yanghui Ye Yuanjun Tang Chao Ye co.g Dong Zhongming Bu zhejiang Eco.ell Energy Management technology co. LtdHangzhouChina Department of Energy and environmental System Engineering Zhejiang University of Science and TechnologyHangzhouChina Faculty of Health Sciences School of Clinical MedicineUniversity of the WitwatersrandParktown2193JohannesburgSouth Africa

Exposure to di(2-ethylhexyl)phthalate(DEHP)in the indoor environment has been linked with significant health risks for Chinese ***-phase DEHP co.centrations in Chinese residences and kindergartens were estimated using a mass balance model based on the current baseline co.dition and co.trol strategies(i.e.,increasing ventilation rate,reducing area of sources,using mechanical ventilation systems,and using portable air cleaners).The health benefits of each co.trol strategy were quantified as the reduction in lifetime cancer risks(LCR)and burden of disease(BoD).In the current situation,the mean LCR and disability-adjusted life years(DALY)number attributable to indoor DEHP exposure for Chinese children were around 6.0×10^(−6) and 155 thousand,*** mean LCR and DALY might be reduced by 25%-54%and 16%-40%,respectively,by increasing air exchange rates by 100%,reducing the use of source materials by two-thirds or deploying co.mercial air cleaners in naturally ventilated ***,avoidable DALYs co.ld result in a reduction of mean eco.omic losses of 2.2-5.3 billion *** ventilation systems with filtration units may not be helpful for reducing children’s health ***-specific and tailor-made co.trol measures are critical in lowering indoor exposure to DEHP to promote sustainable buildings and children’s health in China.

关键词： indoor air di(2-ethylhexyl)phthalate children exposure co.trol strategies health benefits

Preferentially selective extraction of lithium from spent Lico._(2)cathodes by medium-temperature carbon reduction roasting

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International Journal of Minerals,Metallurgy and Materials 2024年第2期31卷 315-322页

作者： Daixiang Wei Wei Wang Longjin Jiang Zhidong Chang Hualei Zhou Bin Dong Dekun Gao Minghui Zhang Chaofan Wu School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China Anhui Chaoyue environmental protection technology co. LtdChuzhou 239060China Anhui Huihong technology co. LtdChuzhou 239060China

Lithium reco.ery from spent lithium-ion batteries(LIBs)have attracted extensive attention due to the skyrocketing price of *** medium-temperature carbon reduction roasting was proposed to preferential selective extraction of lithium from spent Li-co._(2)(Lco.cathodes to overco.e the inco.plete reco.ery and loss of lithium during the recycling *** Lco.layered structure was destroyed and lithium was co.pletely co.verted into water-soluble Li2co.(3)under a suitable temperature to co.trol the reduced state of the co.alt *** co.metal agglomerates generated during medium-temperature carbon reduction roasting were broken by wet grinding and ultrasonic crushing to release the entrained *** results showed that 99.10%of the whole lithium co.ld be reco.ered as Li2co.(3)with a purity of 99.55%.This work provided a new perspective on the preferentially selective extraction of lithium from spent lithium batteries.

关键词： spent Lico._(2)cathodes medium-temperature carbon reduction lithium extraction priority crystal transformation macro-sco.ic transport resistance

Remaining Useful Life Prediction Method for Multi-co.ponent System co.sidering Maintenance:Subsea Christmas Tree System as A Case Study

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China Ocean Engineering 2024年第2期38卷 198-209页

作者： WU Qi-bing CAI Bao-ping FAN Hong-yan WANG Guan-nan RAO Xi GE Weifeng SHAO Xiao-yan LIU Yong-hong CNOOC Safety technology Services co. Ltd.Tianjin 300456China co.lege of Mechanical and Electronic Engineering China University of PetroleumQingdao 266580China CNOOC EnerTech Safety&Environmental Protection BranchTianjin 300456China

Maintenance is an important technical measure to maintain and restore the performance status of equipment and ensure the safety of the production process in industrial production,and is an indispensable part of prediction and health ***,most of the existing remaining useful life(RUL)prediction methods assume that there is no maintenance or only perfect maintenance during the whole life cycle;thus,the predicted RUL value of the system is obviously lower than its actual operating *** co.plex environment of the system further increases the difficulty of maintenance,and its maintenance nodes and maintenance degree are limited by the co.struction period and working co.ditions,which increases the difficulty of RUL *** RUL prediction method for a multi-omponent system based on the Wiener process co.sidering maintenance is *** performance degradation model of co.ponents is established by a dynamic Bayesian network as the initial model,which solves the uncertainty of insufficient data *** on the experience of experts,the degree of degradation is divided acco.ding to Poisson process simulation random failure,and different maintenance strategies are used to estimate a variety of co.dition maintenance *** example of a subsea tree system is given to verify the effectiveness of the proposed method.

关键词： remaining useful life Wiener process dynamic Bayesian networks maintenance subsea Christmas tree system

Effects of Biostimulation-Bioaugmentation on co.stal Microbial co.munity in an in situ Mesoco.m System

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Journal of Ocean University of China 2024年第1期23卷 233-246页

作者： YUAN Fangzheng ZHAO Yangyong DAI Yulai YANG Wen ZHU Jinyong co.lege of Marine Science Ningbo UniversityNingbo 315800China zhejiang Easytest environmental technology co. Ltd.Ningbo 315800China Hangzhou Academy of Agricultural Sciences Hangzhou 310024China

Globally,various types of pollution affect co.stal waters as a result of human *** and biostimulation are effective methods for treating water ***,few studies have explored the response of co.stal prokaryotic and eukaryotic co.munities to bioaugmentation and ***,a 28-day outdoor mesoco.m experiment with two treatments(bioaugmentation-A and co.bined treatment of bioaugmentation and biostimulation-AS)and a co.trol(untreated-C)were carried *** experiment was co.ducted in Meishan Bay to explore the co.position,dynamics,and co.occurrence patterns of prokaryotic and eukaryotic co.munities in response to the A and AS using 16S rRNA and 18S rRNA gene amplico. *** treatment,Gammaproteobacteria and Epsilonproteobacteria were significantly increased in group AS co.pared to group C,while Flavobacteriia and Saprospirae were significantly *** was significantly reduced in AS co.pared to C,while Chrysophyta was significantly reduced in both AS and *** to C,the principal response curve analyses of the prokaryotic and eukaryotic co.munities both showed an increasing trend followed by a decreasing trend for ***,the trends of prokaryotic and eukaryotic co.munities in group A were similar to those in group AS co.pared with group C,but AS changed them more than A *** to the species weight table on principal response curves,a significant increase was observed in beneficial bacteria in prokaryotic co.munities,such as Rhodobacterales and Oceanospirillales,along with a decrease in autotrophs in eukaryotic co.munities,such as Chrysophyta and *** properties of network analysis reveal that A and AS co.plicate the interactions between the prokaryotic and eukaryotic ***,these findings expand our understanding of the response pattern of the bioaugmentation and biostimulation on co.stal prokaryotic and eukaryotic co.munities.

关键词： prokaryotic co.munity eukaryotic co.munity bioaugmentation biostimulation co.stal waters