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Evaluating the effectiveness of using ClO_2 bleaching as substitution of traditional Cl_2 on PCDD/F reduction in a non-wood pulp and paper mill using reeds as raw materials

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Green Energy & Environment 2018年第3期3卷 302-308页

作者： Lili Yang Liping Fang Linyan Huang Yuyang Zhao Guorui Liu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of Sciences University of Chinese Academy of Sciences Institute for Environmental Reference Materials of Ministry of Environmental Protection of the People's Republic of China

The effectiveness of ClO_2 bleaching as a replacement for conventional Cl_2 bleaching,which is intensively practiced in developing countries,to reduce polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs)in non-wood pulp and paper mills has not been field tested.The first field study was performed to investigate PCDD/F variations when ClO_2 bleaching was used as a substitute for conventional Cl_2 bleaching in a non-wood pulp and paper mill.It was found that the PCDD/F toxic equivalents(TEQs)in solid and effluent samples were approximately 1.3–14.9 times lower when ClO_2 bleaching was used instead of the conventional Cl_2 bleaching.2,3,7,8-Substituted tetrachlorinated dibenzofurans(2,3,7,8-TCDF)were the dominant contributors to total PCDD/F TEQs in samples from the investigated mill when using conventional Cl_2 bleaching.The formation amounts of 2,3,7,8-TCDF were reduced from 1.56–2.76 pg TEQ/g to 0.02–0.32 pg TEQ/g in solid samples when ClO_2 bleaching was used instead of the conventional Cl_2 bleaching.The replacement of Cl_2 with ClO_2 might decrease the chlorination reactions of dibenzofuran as potential precursors,and thus reduce the formation amounts of 2,3,7,8-TCDF.The results could provide important knowledge for suggesting the best available technique for PCDD/F reduction for non-wood pulp and paper mills in developing countries.

关键词： PCDD/Fs Pulp and paper mill ClO2 bleaching Cl2 bleaching Persistent organic pollutants

Length matters:Scalable fast encrypted internet traffic service classification based on multiple protocol data unit length sequence with composite deep learning

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Digital Communications and Networks 2022年第3期8卷 289-302页

作者： Zihan Chen Guang Cheng Ziheng Xu Shuyi Guo yuyang Zhou Yuyu zhao School of Cyber Science and Engineering Southeast UniversityNanjing211189China Key Laboratory of Computer Network and Information Integration Ministry of EducationNanjing211189China Purple Mountain Laboratories Nanjing211111China

As an essential function of encrypted Internet traffic analysis,encrypted traffic service classification can support both coarse-grained network service traffic management and security supervision.However,the traditional plaintext-based Deep Packet Inspection(DPI)method cannot be applied to such a classification.Moreover,machine learning-based existing methods encounter two problems during feature selection:complex feature overcost processing and Transport Layer Security(TLS)version discrepancy.In this paper,we consider differences between encryption network protocol stacks and propose a composite deep learning-based method in multiprotocol environments using a sliding multiple Protocol Data Unit(multiPDU)length sequence as features by fully utilizing the Markov property in a multiPDU length sequence and maintaining suitability with a TLS-1.3 environment.Control experiments show that both Length-Sensitive(LS)composite deep learning model using a capsule neural network and LS-long short time memory achieve satisfactory effectiveness in F1-score and performance.Owing to faster feature extraction,our method is suitable for actual network environments and superior to state-of-the-art methods.

关键词： Encrypted internet traffic Encrypted traffic service classification Multi PDU length sequence Length sensitive composite deep learning TLS-1.3

Relative Varying Dynamics Based Whole Cutting Process Optimization for Thin‑walled Parts

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Chinese Journal of Mechanical Engineering 2022年第6期35卷 194-206页

作者： yuyang Tang Jun Zhang Jia Yin Lele Bai Huijie Zhang Wanhua zhao State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710054China AVIC Xi’an Aircraft Industry Group Company Ltd Xi’an 710089China

Thin-walled parts are typically difficult-to-cut components due to the complex dynamics in cutting process.The dynamics is variant for part during machining,but invariant for machine tool.The variation of the relative dynamics results in the difference of cutting stage division and cutting parameter selection.This paper develops a novel method for whole cutting process optimization based on the relative varying dynamic characteristic of machining system.A new strategy to distinguish cutting stages depending on the dominated dynamics during machining process is proposed,and a thickness-dependent model to predict the dynamics of part is developed.Optimal cutting parameters change with stages,which can be divided by the critical thickness of part.Based on the dynamics comparison between machine tool and thickness-varying part,the critical thicknesses are predicted by an iterative algorithm.The proposed method is validated by the machining of three benchmarks.Good agreements have been obtained between prediction and experimental results in terms of stages identification,meanwhile,the optimized parameters perform well during the whole cutting process.

关键词： Thin-walled parts Varying dynamics Frequency response function Whole cutting process Optimization

MgO/Carbon nanocomposites synthesized in molten salts for catalytic isomerization of glucose to fructose in aqueous media

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Green Chemical Engineering 2022年第4期3卷 359-366页

作者： Yuchao Shao Dong-Yang zhao Wenjing Lu yuyang Long Weicheng Zheng Jun zhao Zhong-Ting Hu College of Environment Zhejiang University of Technology(ZJUT)Hangzhou310014China HKBU Institute of Research and Continuing Education Shenzhen518057China Institute of Bioresource and Agriculture Department of BiologyHong Kong Baptist UniversityHong Kong SARChina School of Environment Tsinghua UniversityBeijing100084China Industrial Catalysts Institute of ZJUT Hangzhou310014China Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling Instrumental Analysis CenterSchool of Environmental Science and EngineeringZhejiang Gongshang UniversityHangzhou310012China Hangzhou Research Institute of China Coal Technology&Engineering Group Hangzhou311201China

Isomerization of glucose into fructose has always been an important step in the biorefining process.This study synthesized a novel Mg-decorated carbonaceous catalyst by molten salt method for the application of glucose isomerization.The morphology of carbon microspheres was formed with high specific surface area and pore volume.The effects of Mg loading,catalyst dosage,reaction temperature,and reaction time were investigated and optimized.The highest fructose yield of 34.58%and fructose selectivity of 81.17%were achieved by the catalyst named Mg(100mg)/Carbon at hydrothermal temperature of 100℃ with reaction time of 1.5-2 h,showing the superiority of the catalyst.The results of recycling tests indicated Mg(100mg)/Carbon has good recyclability and can restore its activity after a simple regeneration.And the possible mechanism of glucose isomerization by Mg(100mg)/Carbon was indicated.This study provided a new method for overcoming the difficulty of high energy barrier required for glucose isomerization in the biorefining process.

关键词： Glucose isomerization Heterogeneous catalyst Molten salt method Magnesium Hydrothermal

A novel graphene oxide-carbon nanotubes anchored α-FeOOH hybrid activated persulfate system for enhanced degradation of Orange Ⅱ

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Journal of Environmental Sciences 2019年第9期31卷 73-84页

作者： Shanshan Su yuyang Liu Wei He Xianchun Tang Wei Jin Yaping zhao School of Ecological and Environmental Sciences Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration East China Normal University Shanghai 200241 China School of Environmental Science and Engineering and Experimental Teaching Center of Environmental Science and Engineering Tongji University Shanghai 200071 China

Persulfate activation has been applied as one of the efficient advanced oxidation processes(AOPs) to remediate polluted environments. In this study, a novel α-FeOOH anchored by graphene oxide(GO)-carbon nanotubes(CNTs) aerogel(α-FeOOH@GCA) nanocomposite activated persulfate system(α-FeOOH@GCA + K2S2O8) was applied for decolorization of Orange Ⅱ(OⅡ). The decolorization of OⅡ was remarkably enhanced to a level of ~ 99% in this system compared with that of pristine α-FeOOH(~ 44%) or GO-CNTs(~18%). The enhanced catalytic activity of α-FeOOH@GCA was due to the formation of a heterojunction byα-FeOOH and GO-CNTs as confirmed by the presence of Fe–O–C chemical bonds. The degradation intermediates of OⅡ were comprehensively identified. The proposed degradation pathway of OⅡ begins with the destruction of the conjugated structures of OⅡ by the dominant reactive oxygen species, surface-bound SO4·-. The decolorization efficiency of OⅡ by the α-FeOOH@GCA activated persulfate system decreased from the first to third cycle of recycling. Ultraviolet(UV) irradiation or introduction of a small amount of Fe2+ could restore the activation of this system. The results show that the α-FeOOH@GCA persulfate activation system promises to be a highly efficient environmental remediation method for organic pollutants.

关键词： Graphene oxide Goethite Nanocomposite Persulfate activation Dye Wastewater treatment

Brominated dioxins and furans in a cement kiln co-processing municipal solid waste

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Journal of Environmental Sciences 2019年第5期31卷 339-345页

作者： Lili Yang Yuyang Zhao Miwei Shi Minghui Zheng Yang Xu Cui Li Yuanping Yang Linjun Qin Guorui Liu State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences University of Chinese Academy of Sciences Hebei Engineering Research Center for Geographic Information Application Institute of Geographical Sciences Hebei Academy of Sciences

A field study and theoretical calculations were performed to clarify the levels, profiles, and distributions of polybrominated dibenzo-p-dioxins and dibenzofurans(PBDD/Fs) in a cement kiln co-processing solid waste, with a focus on the PBDF formation mechanism.The raw materials contributed greatly to input of PBDD/Fs into the cement kiln. The PBDD/F concentrations in the raw materials were much higher than those in particle samples from different process stages in the cement kiln. The PBDD/F concentrations in the clinkers were1.40% of the concentrations in the raw materials, which indicated that the high destruction efficiencies for PBDD/Fs by cement kiln. PBDD/F distribution patterns in particle samples collected from different process stages indicated the cement kiln backend was a major site for PBDD/F formation. PBDFs with high levels of halogenation, such as heptabrominated furans(Hp BDF), were the dominant contributors to the total PBDD/F concentrations and accounted for 42%–73% of the total PBDD/F concentrations in the particle samples. Our results showed that co-processing of municipal solid waste in a cement kiln may influence the congener profile of PBDD/Fs, especially for the higher halogenated PBDD fraction. In addition, there were significant correlations between the decabromodiphenyl ether and heptabrominated furan concentrations, which is an indicator of transformation from polybrominated diphenyl ethers to PBDD/Fs. Theoretical calculations were performed and demonstrated that elimination of HBr and Br_2 from polybrominated diphenyl ethers were the dominant formation pathways for PBDD/Fs. These pathways differed from that for polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs).

关键词： Polybrominated dibenzo-p-dioxin and dibenzofuran(PBDD/F) Cement kiln Municipal solid waste Dioxin Formation mechanism

Recent progress and challenges in interdigital microbatteries:Fabrication, functionalization and integration

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Journal of Energy Chemistry 2023年第3期78卷 294-314,I0009页

作者： Li Song Xuting Jin Chunlong Dai yuyang Han Jiatao Zhang Yang zhao Zhipan Zhang Liangti Qu Key Laboratory of Cluster Science Ministry of Education of ChinaKey Laboratory of Photoelectronic/Electrophotonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081China Engineering Research Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou UniversityZhengzhou 450001Henan China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua UniversityBeijing 100084China

Currently,the increasing demands for portable,implantable,and wearable electronics have triggered the interest in miniaturized energy storage devices.Different from conventional energy storage devices,interdigital microbatteries(IMBs) are free of separators and prepared on a single substrate,potentially achieving a short ionic diffusion path and better performance.Meanwhile,they can be easily fabricated and integrated into on-chip miniaturized electronics,holding the promise to provide long-lasting power for advanced microelectronic devices.To date,while many seminal works have been reviewed the topic of microbatteries,there is no work that systematically summarizes the development of IMBs of high energy density and stable voltage platforms from fabrication,functionalization to integration.The current review focuses on the most recent progress in IMBs,discussing advanced micromachining techniques with compatible features to construct high-performance IMBs with smart functions and intelligent integrated systems.The future opportunities and challenges of IMBs are also highlighted,calling for more efforts in this dynamic and fast-growing research field.

关键词： Interdigital microbatteries Fabrication Functionalization

In vivo activities of the structured lipids-1,3-dioleic acid 2-palmitic acid triglyceride(OPO)in high-fat diet mice

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Food Bioscience 2022年第3期47卷 615-624页

作者： yuyang Huang Na Wang Haitian zhao College of Food Engineering Harbin University of CommerceHarbinHeilongjiang150028China College of Food Science Northeast Agricultural UniversityHarbinHeilongjiang150030China National Research Center of Soybean Engineering and Technology HarbinHeilongjiang150027China Department of Food Sciences and Engineering School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbinHeilongjiang150001China

High-energy diets and lipid metabolism can lead to high levels of total cholesterol,a decrease in antioxidant,enzyme activity,and an increase in oxidative stress and dyslipidemia biomarker.In this study,the in vivo antihyperlipidemic and antioxidant effects of 1,3-dioleoyl-2-palmitoyl triglyceride(OPO)using a high fat-diet model were investigated.The mice were divided into groups including high-fat model group(HF),auxiliary group(AG),positive Control group(PC),low OPO dose group(LO),medium OPO dose group(MO)and high OPO.OPO was administrated to 60 hyperlipidemia induced male Kunming mice at the dosage of 200,400 and 800 mg/kg•d body weight,for 35 days.The results showed that the administration of OPO decreased the body weight from 43.92 g in HF to 37.74 g in HO group,liver index from 3.94%in HF to 3.43 in HO group and kidney index from 1.38 in HF%to 1.17%in HO group.The administration of OPO significantly decreased hyperlipidemia mice's serum triglyceride,total cholesterol,and low-density lipoprotein cholesterol levels at P<0.05.High-density lipoprotein cholesterol levels were increased with reductions of visceral hypertrophy and fat accumulation in model mice.Furthermore,in the HO group,superoxide dismutase,catalase and glutathione peroxidase levels increased significantly by 27.39,38.33 and 22.90%at(P<0.05),respectively.OPO also significantly reduced the enzyme activity of aspartate aminotransferase and alanine aminotransferase in serum at P<0.05.These findings suggested that OPO has potential use in hyperlipidemia treatment and other health-related complications.

关键词： 1,3-Dioleoyl-2-palmitoyl triglyceride Antihyperlipidemic Antioxidant In vivo High-fat diet

Time-dependent metabolomics uncover dynamic metabolic adaptions in MCF-7 cells exposed to bisphenol A

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Frontiers of Environmental Science & Engineering 2023年第1期17卷 33-47页

作者： Haoduo zhao Min Liu Junjie Yang yuyang Chen Mingliang Fang School of Civil and Environmental Engineering Nanyang Technological UniversitySingapore 639798Singapore Nanyang Environment&Water Research Institute Nanyang Technological UniversitySingapore 637141Singapore School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Environmental Science and Engineering Fudan UniversityShanghai 200433China

The biochemical consequences induced by xenobiotic stress are featured in dose-response and timeresolved landscapes.Understanding the dynamic process of cellular adaptations is crucial in conducting the risk assessment for chemical exposure.As one of the most phenotype-related omics,metabolome in response to environmental stress can vary from seconds to days.Up to now,very few dynamic metabolomics studies have been conducted to provide time-dependent mechanistic interpretations in understanding xenobiotics-induced cellular adaptations.This study aims to explore the time-resolved metabolite dysregulation manner and dynamically perturbed biological functions in MCF-7 cells exposed to bisphenol A(BPA),a well-known endocrine-disrupting chemical.By sampling at 11 time points from several minutes to hours,thirty seven significantly dysregulated metabolites were identified,ranging from amino acids,fatty acids,carboxylic acids and nucleoside phosphate compounds.The metabolites in different pathways basically showed distinct time-resolved changing patterns,while those within the common class or same pathways showed similar and synchronized dysregulation behaviors.The pathway enrichment analysis suggested that purine metabolism,pyrimidine metabolism,aminoacyl-tRNA biosynthesis as well as glutamine/glutamate(GABA)metabolism pathways were heavily disturbed.As exposure event continued,MCF-7 cells went through multiple sequential metabolic adaptations from cell proliferation to energy metabolism,which indicated an enhancing cellular requirement for elevated energy homeostasis,oxidative stress response and ER-αmediated cell growth.We further focused on the time-dependent metabolite dysregulation behavior in purine and pyrimidine metabolism,and identified the impaired glycolysis and oxidative phosphorylation by redox imbalance.Lastly,we established a restricted cubic splinebased model to fit and predict metabolite’s full range dysregulation cartography,with metabolite’sensitivity comparisons retrieved and novel biomarkers sugges

关键词： Metabolomics BPA MCF-7 Temporal profiling Metabolic adaption Dysregulation correlation