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Data-driven integrated assessment of global wild-caught seafood exported to Hong Kong by 2030 in different representative concentration and shared socioeconomic pathways

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Advances in Climate Change Research 2022年第4期13卷 554-563页

作者： Zhongming LU Division of Environment and Sustainability Hong Kong University of Science and TechnologyHong KongChina

Wild-caught seafood is an important commodity traded globally.As elimate change and socioeconomic development is affecting global marine capture fisheries,the impact on regional supply remains unexplored,especially for areas like Hong Kong relying on global trading to meet high seafood consumption.However,it is challenging to assess the global marine capture fisheries production using complex process-based models.In this study,a data-driven integrated assessment approach was developed to evaluate the change of global seafood supply from wild catch.With the catch data available from 1990 to 2014,machine learning models were trained and tested including environmental,socioeconomic,geographic,and technological features to estimate the catch by ocean grid cells for individual species.Nine popular seafood categories in Hong Kong were studied,which include 68 species in total.Important input features for estimating the catch were compared across species and the impacts of these input features were interpreted using partial dependence plots.The global marine wild catch of the 68 species by countries and the export to Hong Kong were projected by 2030 in RCP2.6-SSPi,RCP4.5-SSP2,RCP7.0-SSP3,and RCP8.5-SSP5.Performances of machine learning models demonstrate the reliability of data-driven methods to estimate the catch by ocean grid cells.The importance of geographic features rank top for the estimate while that of climate change and socioeconomic development varies significantly across species.The projection reflects a drop of squid exported to Hong Kong due to the reduction of squid supply from China's mainland during 2015-2019.The export of wild-caught seafood of the nine categories to Hong Kong willhave a slight decline by about 16%from the 2020 level by 2030.The projection also suggests no significant differences among the four climatic-socioeconomically interrelated scenarios regarding the export to Hong Kong before 2030.Top producers include China's mainland,United States,and Japan.However,China's mainland and Japan w

关键词： Machine learning Integrated assessment Wild-caught seafood Export to Hong Kong Climate change Socioeconomic development

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Long-term variation and evaluation of air quality across Hong Kong

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Journal of environmental Sciences 2023年第5期127卷 284-294页

作者： Yan Tan Shuwen Han Yi Chen Zhongbiao Wu Shun-cheng Lee School of environmental and Municipal Engineering Qingdao University of Technology Department of Civil and environmental Engineering The Hong Kong Polytechnic University Division of Environment and Sustainability The Hong Kong University of Science and Technology Key Laboratory of environment Remediation and Ecological Health Ministry of Education College of Environmental and Resource Sciences Zhejiang University

Study of Air Quality Objectives (AQOs) and long-term changes of air pollution plays a decisive role in formulating and re?ning pollution control strategies.In this study,10-year variations of six major air pollutants were analyzed at seven monitoring sites in Hong Kong.The continuous decrease of annual averaged concentrations of NO2,SO2,CO,PM2.5and PM10and numbers of days with severe pollution conditions validated the ef?ciency of the series of air pollution control schemes implemented by the Hong Kong government.However,there is still a big gap to meet the ultimate targets described by the World Health Organization.Besides,the concentration of O3at roadside and urban stations increased by 135%±25%and37%±18%from 2011 to 2020,respectively,meanwhile the highest 8 hr averaged O3concentration was observed as 294μg/m3at background station in 2020,which pointed out the increasing ozone pollution in Hong Kong.There was a great decrease in the annual times of air quality health index (AQHI) laying in“high”,“very high”and“serious”categories from2011 to 2020 with the decrease rate of 89.70%,91.30%and 89.74%at roadside stations,and79.03%,95.98%and 72.73%at urban stations,respectively.Nevertheless,the number of days categorized as“high”or above at roadside station was twice more than that in the urban station during the past ten years.Thus,more policies and attentions should be given to the roadside air quality and its adverse health effect to pedestrians on street.

关键词： Long-term variation Roadside Hong Kong air quality Air Quality Objectives (AQO) Air quality health index (AQHI)

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A comparative study between ionic liquid coating and counterparts in bulk for toluene absorption

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Green Chemical Engineering 2020年第2期1卷 147-154页

作者： Ventura Castillo Ramos Wei Han King Lun Yeung Division of Environment and Sustainability Hong Kong SARChina Department of Chemical and Biological Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina

The structure-activity relationship(SAR)for toluene absorption and desorption in ionic liquids(ILs)has been investigated for seven commercial ILs in bulk and thin liquid layer.ILs with imidazolium cations of different alkyl chain lengths and a Hofmeister series of anions including[CH3COO],[I],[BF4],[HSO4],and[PF6]were included.Absorption capacity for toluene increases with increasing kosmotropicity of the cation and anion,while the absorption rate in bulk ILs is governed by viscosity and that in thin ILs layer by the oil-water partition coefficient(Kow).A regenerability coefficient(Rp)measures toluene desorption and IL regeneration.The release rate as measured by dRp/dt correlates well with the Kow and viscosity of the ILs and tx,the time required to completely desorb toluene is related to its ionic strength as measured from v(C2H)of the imidazolium cation.These properties are in turn governed by the kosmotropicity of the cation and anion pair forming the IL.

关键词： Ionic liquids Volatile organic compounds Absorption Air purification Structure-activity relationship

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An atmospheric water harvester with fast and energy-saving water removal and recovery

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Biosurface and Biotribology 2023年第1期9卷 9-16页

作者： Jiayu Song Zhang Liu Jhoanne Pedres Boñgol Zhaoxin Zhang King Lun Yeung Department of Chemical and Biological Engineering the Hong Kong University of Science and TechnologyKowloonHong Kong Division of Environment and Sustainability the Hong Kong University of Science and TechnologyKowloonHong Kong division of Emerging Interdisciplinary Areas The Hong Kong University of Science and TechnologyKowloonHong Kong HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute ShenzhenGuangdongChina

Moisture removal and water recovery from the air are vital for regulating indoor humidity and mitigating water scarcity.Most atmospheric water harvesters(AWH)focus primarily on increasing the moisture capture rate,but for it to be economical and sustainable,it is essential to consider the energy required to recover and harvest the captured water.Here,a mechanically flexible,biphilic sorption-based AWH made of green,environmentally friendly material is presented.It consists of a hygroscopic chitosan polymer embedded within a flexible,hydrophobic silica xerogel that can harvest 86.3 g water/g chitosan at 97%relative humidity and 25℃reaching saturation after 30 days(i.e.2.88 g water/g chitosan/day).Roughly 88%of the sorbed moisture was recovered by mechanical squeezing(ca.0.020 MPa)within 150 s.Repeated water harvesting experiments and uniaxial compression tests demonstrate that chitosan-silica xerogel is durable for longterm operations,providing a fast,reliable,and sustainable moisture removal and water harvesting tool.

关键词： atmospheric water harvesting flexible xerogel heterogeneous wettability mechanical water recovery

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A comparison of fish tissue mercury concentrations from homogenized fillet and nonlethal biopsy plugs

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Journal of environmental Sciences 2019年第6期31卷 137-145页

作者： Alexis Knight Satyendra P.Bhavsar Brian A.Branfireun Peter Drouin Ram Prashad Steve Petro Moustapha Oke Department of Biology and Centre for environment and sustainability Western University Ontario Ministry of the environment Conservation and Parks

The use of biopsy plugs to sample fish muscle tissue for mercury analyses is a viable alternative to lethal sampling; however, the practice has yet to be widely implemented in routine monitoring due to concerns about variability of mercury concentrations in fish muscle tissues. Here we examine distribution of mercury in fillets of four fish species(Walleye, Northern Pike, Smallmouth Bass and Lake Trout), suitability of left/right side of fillet for biopsy sampling, and appropriateness of re-using a biopsy punch. The results showed that average mercury concentrations in left and right fillets of fish are similar.Mercury concentrations in biopsy plug samples, taken from the anterior dorsal area of the fish fillet, were statistically equivalent to the mercury concentrations in homogenized fillets. There was no discernible cross contamination between samples when a biopsy punch was reused after washing in hot soapy water, and as such, biopsy punches can be recycled during sampling to reduce the sampling cost. If a tissue mass collected from a specific site on the fillet is insufficient, then we suggest sampling corresponding locations on the other fillet rather than sampling two adjacent sites on one fillet to obtain more tissue. The results presented here can improve the accuracy of fillet biopsy plug sampling,minimize fish mortality for mercury monitoring, and reduce labor and material costs in monitoring programs.

关键词： Hg or mercury Fish advisory Nonlethal Monitoring Muscle tissue Biopsy punch plug

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Facet effect of copper(I) sulfide nanocrystals on photoelectrochemical properties

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Progress in Natural Science:Materials International 2012年第6期22卷 585-591页

作者： Yecheng Li Lei Zhang Jimmy C.Yu Shu-Hong Yu Department of Chemistry and Institute of environment Energy and SustainabilityThe Chinese University of Hong KongShatinNew Territories Department of Chemistry and Institute of environment Energy and SustainabilityThe Chinese University of Hong KongShatinNew Territories division of Nanomaterials and Chemistry Hefei National Laboratory for Physical Sciences at MicroscaleDepartment of ChemistryNational Synchrotron Radiation LaboratoryUniversity of Science and Technology of China

14-facets polyhedra chalcocite Cu;S nanocrystals were synthesized by a solvothermal method.It was found that the presence of trio-n-octylphosphine during the synthesis was essential for the exposure of unconventional {110} faces.Results from photoelectrochemical measurements indicated that the polyhedra bounded by {110} facets exhibited much higher activities than the Cu;S hexagonal plates with only {001} facets.

关键词： Copper(I) sulfide Photoelectrochemical properties Facet effect

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Nitrogenous and carbonaceous aerosols in PM_(2.5) and TSP during pre-monsoon:Characteristics and sources in the highly polluted mountain valley

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Journal of environmental Sciences 2022年第5期34卷 10-24页

作者： Hemraj Bhattarai Lekhendra Tripathee Shichang Kang Pengfei Chen Chhatra Mani Sharma Kirpa Ram Junming Guo Maheswar Rupakheti Earth System Science Programme and Graduate division of Earth and Atmospheric Sciences The Chinese University of Hong KongHong KongChina State Key Laboratory of Cryospheric Science Northwest Institute of Eco-environment and ResourcesChinese Academy of Sciences(CAS)Lanzhou 730000China Key Laboratory of Tibetan environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchCASBeijing 100101China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100085China Himalayan environment Research Institute(HERI) Kathmandu 44602Nepal Central Department of environmental Sciences Tribhuvan UniversityKathmandu 44613Nepal Institute of environment and Sustainable Development Banaras Hindu UniversityVaranasi 221005India Institute for Advanced sustainability Studies Potsdam 14467Germany

This study reports for the first time a comprehensive analysis of nitrogenous and carbona-ceous aerosols in simultaneously collected PM_(2.5) and TSP during pre-monsoon(March-May 2018)from a highly polluted urban Kathmandu Valley(KV)of the Himalayan foothills.The mean mass concentration of PM_(2.5)(129.8 μg/m^(3))was only-25%of TSP mass(558.7 μg/m^(3))indicating the dominance of coarser mode aerosols.However,the mean concentration as well as fractional contributions of water-soluble total nitrogen(WSTN)and carbonaceous species reveal their predominance in find-mode aerosols.The mean mass concentration of WSTN was 17.43±4.70 μg/m^(3)(14%)in PM_(2.5) and 24.64±8.07 μg/m^(3)(5%)in TSP.Moreover,the fractional contribution of total carbonaceous aerosols(TCA)is much higher in PM_(2.5)(~34%)than that in TSP(~20%).The relatively low OC/EC ratio in PM_(2.5)(3.03±1.47)and TSP(4.64±1.73)suggests fossil fuel combustion as the major sources of carbonaceous aerosols with contributions from secondary organic aerosols.Five-day air mass back trajectories sim-ulated with the HYSPLIT model,together with MODIS fire counts indicate the influence of local emissions as well as transported pollutants from the Indo-Gangetic Plain region to the south of the Himalayan foothills.Principal component analysis(PCA)also suggests a mixed contribution from other local anthropogenic,biomass burning,and crustal sources.Our re-sults highlight that it is necessary to control local emissions as well as regional transport while designing mitigation measures to reduce the KV's air pollution.

关键词： Nitrogenous aerosol Carbonaceous aerosols Major ions Particulate pollution Kathmandu Valley(KV)

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从热电厂粉煤灰中提取铝生产硫酸铝（英文）

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Transactions of Nonferrous Metals Society of China 2017年第9期27卷 2082-2089页

作者： Seoul SANGITA Niva NAYAK Chitta Ranjan PA environment & sustainability Department CSIR-Institute of Minerals & Materials Technology

目前从热电厂粉煤灰中提取有价金属的方法存在一定的局限性。研究用硫酸从热电厂粉煤灰中提取铝制备高纯硫酸铝(>99.0%)。以硫酸为萃取剂分别提取Talcher热电站和Vedanta铝业有限公司的粉煤灰中的铝制备硫酸铝。采用X射线衍射谱、傅里... 详细信息

目前从热电厂粉煤灰中提取有价金属的方法存在一定的局限性。研究用硫酸从热电厂粉煤灰中提取铝制备高纯硫酸铝(>99.0%)。以硫酸为萃取剂分别提取Talcher热电站和Vedanta铝业有限公司的粉煤灰中的铝制备硫酸铝。采用X射线衍射谱、傅里叶红外光谱和热重分析等手段对硫酸铝产品进行表征,用电感耦合等离子-光学发射光谱测量硫酸铝产品的纯度。结果表明,粉煤灰的浸出率取决于粉煤灰与硫酸的固液比以及粉煤灰的颗粒尺寸。物化分析结果表明,所得产品为Al_2(SO_4)_3·18H_2O,其铁含量较低,仅为0.08%(质量分数)。

关键词：粉煤灰硫酸硫酸铝浸取固液比颗粒尺寸

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Flexible polymeric patch based nanotherapeutics against non-cancer therapy

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Bioactive Materials 2022年第12期7卷 471-491页

作者： Houjuan Zhu Justin Mah Jian Qiang Chen Gang Wang Chui Yu Chan Qiang Zhu Enyi Ye Zibiao Li Xian Jun Loh Institute of Materials Research and Engineering A*STAR(Agency for ScienceTechnology and Research)Singapore138634Singapore division of Chemistry and Biological Chemistry School of Physical and Mathematical SciencesNanyang Technological UniversitySingapore637371Singapore Institute of sustainability for Chemicals Energy and Environment(ISCE2)A*STAR(Agency for ScienceTechnology and Research)1 Pesek RoadJurong IslandSingapore627833Singapore

Flexible polymeric patches find widespread applications in biomedicine because of their biological and tunable features including excellent patient compliance,superior biocompatibility and biodegradation,as well as high loading capability and permeability of drug.Such polymeric patches are classified into microneedles(MNs),hydrogel,microcapsule,microsphere and fiber depending on the formed morphology.The combination of nanomaterials with polymeric patches allows for improved advantages of increased curative efficacy and lowered systemic toxicity,promoting on-demand and regulated drug administration,thus providing the great potential to their clinic translation.In this review,the category of flexible polymeric patches that are utilized to integrate with nanomaterials is briefly presented and their advantages in bioapplications are further discussed.The applications of nanomaterials embedded polymeric patches in non-cancerous diseases were also systematically reviewed,including diabetes therapy,wound healing,dermatological disease therapy,bone regeneration,cardiac repair,hair repair,obesity therapy and some immune disease therapy.Alternatively,the limitations,latest challenges and future perspectives of such biomedical therapeutic devices are addressed.

关键词： Flexible polymeric patches Microneedle Hydrogel Nanomaterials Non-cancer therapy Biomedical scaffolds

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Combinations of electron and proton donors in transition-metal complex mediated nitrogen reduction reactions

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Science China Chemistry 2024年第7期67卷 2136-2154页

作者： Delong Han Li Yang Hao Huang Priyanka Chakraborty Shashikant U.Dighe Kuo-Wei Huang KAUST Catalysis Center and division of Physical Science and Engineering King Abdullah University of Science and Technology Agency for Science Technologyand ResearchInstitute of Materials Research and Engineering and Institute of Sustainability for ChemicalsEnergy and Environment

Nitrogen fixation is a complex process involving the transfer of six electrons and protons. Diverging from the conventional Haber-Bosch process, which relies on hydrogen(H2) to provide both electrons and protons to reduce nitrogen(N2), homogeneous transition metal complex-catalyzed N2reduction reactions(NRR) employ an array of electron and proton donors or even electron donors combined with silanes. As the synthesis of diverse catalytic progress, the categories of donors have seen rapid expansion.However, existing literature only provides summaries regarding the metal, ligands, and mechanism. Despite the significance of electron and proton donor combinations in nitrogen reduction reactions, no literature has thoroughly reviewed this aspect.Therefore, we hereby compiled a comprehensive list of commonly used reagents in N2reduction and classified them according to their specific donor combinations. This review presents clear and organized information about these combinations, along with a summary of their general performance trend in NRR with related catalysts. Finally, we conclude the discussion by highlighting key points for researchers to consider when selecting catalysts and donor combinations, with the ultimate goal of advancing the field of nitrogen fixation.

关键词： dinitrogen reduction reaction reducing donor combination transition metal complexes homogeneous catalysis

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