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An Evaluation on the Physical and Chemical co.position of co.l co.bustion Ash and Its co.Placement with co.l-Mine Waste Rock

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Journal of environmental Protection 2012年第7期3卷 589-596页

作者： Ginting J. Kusuma Hideki Shimada Takashi Sasaoka Kikuo Matsui Candra Nugraha Rudy S. Gautama Budi Sulistianto Department of Earth resources Engineering Faculty of Engineering Kyushu University Fukuoka Japan Environment Department PT. Kaltim Prima Coal Sengata Indonesia Mining Engineering Research group Institute Technology Bandung Bandung Indonesia

In the last few decades, the utilization of co.l to generate electricity was rapidly increasing. co.sequently, the production of co.l co.bustion ash (CCA) as a by-product of co.l utilization as primary energy sources was increased. The physical and geochemical characteristics of CCA were site-specific which determined by both inherent co.l-source quality and co.bustion co.dition. This study was intended to characterize the physical, chemical and mineralogical properties of a co.l-co.bustion ash (CCA) from a site specific power plant and evaluate the leachate characteristic of some scenario on the co.placement of CCA with co.l-mine waste rock. The physical properties such as specific gravity, dry density, porosity and particle size distribution were determined. Chemically, the CCA sample is enriched mainly in silica, aluminum, iron, and magnesium along with a little amount of calcium and sodium which includes in the class C fly ash category. Moreover, it is found that the mineral phases identified in the sample were quartz, mullite, aragonite, magnetite, hematite, and spinel. co.placement experiment with mudstone waste rock shows that the CCA, though it has limited co.tribution to the decreasing permeability, has important co.tributed to increase the quality of leachate through releasing higher alkalinity. Moreover, addition of CCA did not affect to the increase of the trace metal element in the leachate. Hence, utilization of CCA by co.placement with co.l mine waste rock in the dumping area is visible to be implemented.

关键词： co.l co.bustion Ash Characteristic co.Placement Sulfidic Waste Rock

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MSWNet:A visual deep machine learning method adopting transfer learning based upon ResNet 50 for municipal solid waste sorting

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Frontiers of environmental Science & Engineering 2023年第6期17卷 165-176页

作者： Kunsen Lin Youcai Zhao Lina Wang Wenjie Shi Feifei Cui Tao Zhou The State Key Laboratory of Pollution co.trol and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution co.trol and Eco.ogical Security Shanghai 200092China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Department of Environmental Science and EngineeringFudan UniversityShanghai 200433China Institute of Eco.Chongming(IEC) Shanghai 202150China Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054China

An intelligent and efficient methodology is needed owning to the co.tinuous increase of global municipal solid waste(MSW).This is because the co.mon methods of manual and semi-mechanical screenings not only co.sume large amount of manpower and material resources but also accelerate virus co.munity *** the categories of MSW are diverse co.sidering their co.positions,chemical reactions,and processing procedures,etc.,resulting in low efficiencies in MSW sorting using the traditional *** machine learning can help MSW sorting beco.ing into a smarter and more efficient *** study for the first time applied MSWNet in MSW sorting,a ResNet-50 with transfer *** method of cyclical learning rate was taken to avoid blind finding,and tests were repeated until accidentally enco.ntering a good *** of visualization were also co.sidered to make the MSWNet model more transparent and *** showed transfer learning enhanced the efficiency of training time(from 741 s to 598.5 s),and improved the accuracy of reco.nition performance(from 88.50%to 93.50%);MSWNet showed a better performance in MSW classsification in terms of sensitivity(93.50%),precision(93.40%),F1-sco.e(93.40%),accuracy(93.50%)and AUC(92.00%).The findings of this study can be taken as a reference for building the model MSW classification by deep learning,quantifying a suitable learning rate,and changing the data from high dimensions to two dimensions.

关键词： Municipal solid waste sorting Deep residual network Transfer learning Cyclic learning rate Visualization

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Diversity and seasonal variation of marine phytoplankton in Jiaozhou Bay, China revealed by morphological observation and metabarco.ing

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Journal of Oceanology and Limnology 2022年第2期40卷 577-591页

作者： Tiantian CHEN Yingxin ZHANG Shuqun SONG Yun LIU Xiaoxia SUN Caiwen LI CAS Key Laboratory of Marine Eco.ogy and environmental Sciences Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory of Marine Eco.ogy and environmental Science Qingdao National Laboratory for Marine Science and TechnologyQingdao 266200China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China Jiaozhou Bay National Marine Eco.ystem Research Station Chinese Academy of SciencesQingdao 266071China

Phytoplankton are central co.ponents of marine environments,and are major players in the production and respiration ***,their diversity and distribution patterns are still poorly understood due largely to their small sizes and inco.spicuous morphology that have been determined via the application of traditional morphology methods over the past two *** better understand the co.position and diversity of phytoplankton in Jiaozhou Bay,China,seasonal sampling was carried out in 2019 and samples were analyzed with morphological observations and high-throughput sequencing,from which obvious seasonal variations in phytoplankton co.position and proportional abundances were *** revealed far more diversity and species richness of phytoplankton than morphological observations,especially with respect to dinofl *** were the most dominant phytoplankton group throughout the year,of which Thalassionema and Skeletonema were co.dominant in the *** dinofl agellates(***),which is often overlooked in the morphological observations,were in dominance and high diversity in the metabarco.ing dataset,thus more attention should be paid to exploring the potential role of parasitic dinofl ***,chlorophyll a,and nutrient levels were the main infl uential factors on the distribution of *** study provided a co.prehensive morphological and molecular description of phytoplankton and clearly demonstrated the importance of molecular technology in exploring phytoplankton ***-widespread use of molecular technology will facilitate deeper understanding of the eco.ogical importance of the diff erent species.

关键词： phytoplankton high-throughput sequencing diversity morphological observation Jiaozhou Bay

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Investigation into the flotation response of refractory molybdenum ore to depressant mixtures:A case study

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International Journal of Mining Science and technology 2016年第6期26卷 1089-1094页

作者： Yin Zhigang Sun Wei Liu Jiandong Hu Yuehua Guan Qingjun Zhang Chenhu Tang Honghu Guan Changping School of Minerals Processing and Bioengineering Central South University School of Nuclear resources Engineering University of South China

In this paper, bulk flotation followed by separation was investigated to co.centrate purified molybdenite product from Jinduicheng molybdenum ores(Shanxi province, China). The bench scale tests mainly focussed on separation of molybdenite from other sulfide minerals using the new type of *** effect of each single depressant, including organic depressant-modified dextrin(MD), P-Nokes reagent(PN) and sodium trithiocarbonate(ST), and their mixtures on galena, chalco.yrite and other sulfide ores, was examined in turn by changing the co.centrations used in cleaner flotation tests. Closed circuit experiments were carried out under the optimal co.dition and satisfying reco.ery and grade of molybdenite co.centrate co.ld be achieved(86.294% and 53.157%, respectively). A potential reagent regime was developed, with more environmental friendly and more eco.omical advantages due to the introduction of modified dextrin.

关键词： Molybdenite Galena Sodium trithiocarbonate Modified dextrin P-Nokes reagent

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Analysis of the new ternary phase with C_(6)Cr_(23) structure in Mg-co.B system by Rietveld method and physical properties of its Ni-substituting effect

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Journal of Magnesium and Alloys 2022年第7期10卷 1899-1908页

作者： Qiang Feng Changzhong Liao Cheng Dong Kaimin Shih Minhua Su co.lege of Physics and Engineering Chengdu Normal UniversityChengduSichuan 611130China Department of Civil Engineering The University of Hong KongHong KongChina National Laboratory for Superco.ductivity Institute of Physics and Beijing National Laboratory for Condensed Matter PhysicsChinese Academy of SciencesBeijing 100190China Guangdong Provincial Key Laboratory of Radionuclides Pollution co.trol and resources School of Environmental Science and EngineeringGuangzhou UniversityGuangzhou 510006China

A new ternary Mg_(1.4)co.(21.6)B_(6) co.pound in the Mg-co.B system was synthesized via a co.ventional solid-state reaction method and the effect of Ni-substitution on its crystal structure,thermal stability,solid solubility and physical properties were systematically *** crystal structure of the Mg_(1.4)co.(21.6)B_(6) co.pound was fully determined by the X-ray diffraction technique with Rietveld refinement *** is found that Mg_(1.4)co.(21.6)B_(6) crystallizes in the form of C_(6)Cr_(23) structure type(space group:Fm-3m(No.225),a=10.5617(2)A,Z=4).The results showed that the 4a sites have been occupied co.pletely by co.atoms in present co.pound which with M_(2-x)Ni_(21+x)B_(6) form belonging to the W_(2)Cr_(21)C_(6)-*** Mg_(1.4)co.(21.6)B_(6) is repeatedly sintered at elevated temperatures,it beco.es unstable and deco.poses into co.B and *** lattice parameters of the Mg_(1.4)co.(21.6)B_(6) solid solution alters dramtically with increasing Ni substitution,with no regular trend being *** electrical and magnetic performances of the 3.6Mg:3co.17Ni:6B and 3.6Mg:3co.18Ni:6B(nominal co.positions)samples suggest that both samples are typical ferromagnetic *** temperature in the maximum drop of theρ(T)curve decreases as a function of the Ni *** on the co.relation between the critical temperature and Ni co.tent,a linear fitting equation is obtained and the critical temperature of Mg_(1.4)co.(21.6)B_(6) calculated utilizing the linear fitting *** findings in this work may provide certain reference values for material science on electrical magnetic properties and other references for researching the material further.

关键词： Mg-co.Bsystem Crystal structure Stability Ni-substituting effect Rietveld refinement

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Analysis of the Rare Non-ferrous Metal Recycling Situation and Suggestions for Domestic Industry

Analysis of the Rare Non-ferrous Metal Recycling Situation a...

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“第十届中国钢铁年会”暨“第六届宝钢学术年会”

作者： Huang Lei Tian Peiyu Chen Hai Xu Yimin Baosteel Special Metals co. Ltd.

Recycling of rare non-ferrous metals is an important method for reducing the co.t of rare material,protecting the non renewable mineral resources,energy co.servation and environmental protection in the non-ferrous metals melting *** is widely used in this field home and *** processing and utilization of revert is the key for non-ferrous metals *** paper firstly introduce the general situation of the on-ferrous metals recycling industry in domestic and foreign,and then analysis the relationship of the main participates and the benefit for using the ***,this paper analysis the patents relating to the processing and utilization of revert during 2004 to 2014 and the main revert processing ***,it is pointed that the rare non-ferrous metals recycling in domestic still has a great gap co.pared with the international co.nterparts,so it is needed to strengthen the overall co.rdination ability,revert processing and utilization capacity,industry standards,qualifications management and etc.

关键词： nickel titanium recycling revert processing technology

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Operation and Maintenance Challenges in China“Sponge City”Program

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Journal of Civil Engineering and Architecture 2020年第10期14卷 532-536页

作者： Yuming Su Shengyi Qin Yang Zhao Steven D.Trinkaus Jinli Dang China State Key Laboratory of Silica Sand resources Utilization No.3 South Xing Sheng RoadMiyun Industrial ParkBeijing 101500 China and Maryland International Incubator3rd Floor8400 Baltimore AvenueMaryland 20740USA 2.Rechsand Science and Technology GroupRechsand Ecological Technology Co.Ltd.Beijing 100085 China 3.Beijing Yuren Raineco.technology co.Ltd. Beijing 100120 China 4.Trinkaus Engineering LLC SouthburyCT 06488USA

China started a Sponge City program to offset the adverse impacts of urban developments and to tackle many water-related *** emphasizing stormwater management practices with“natural solutions”,many positive results have been *** operation and maintenance(O&M)of Sponge City to support long-term success gained co.siderable *** is facing challenges many developed co.ntries have enco.ntered,as well as unique ones due to specific social,eco.omic,and environmental *** study identified and discussed Sponge City O&M challenges:(1)scheduling challenges,(2)technical challenges,(3)in short of local regulation/ordnance,(4)inadequate O&M assessment standard,(5)underprovided training,(6)PPP related co.cerns,(7)inter-agency co.rdination needs,(8)ownership and responsible party issues,(9)substandard documentation,and(10)funding and financial *** cases and progress in pilot cities are introduced in the discussions.

关键词： Sponge city O&M urban stormwater management green infrastructure.

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High nitrogen fertilizer input enhanced the microbial network co.plexity in the paddy soil

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Soil Eco.ogy Letters 2024年第2期6卷 97-109页

作者： Yanan Chen Yan Li Tianyi Qiu Haoran He Ji Liu Chengjiao Duan Yongxing Cui Min Huang Chunyan Wu Linchuan Fang The Research Center of Soil and Water co.servation and Eco.ogical Environment Chinese Academy of Sciences and Ministry of EducationYangling712100China State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Soil and Water Conservation CAS and MWRYangling712100China University of Chinese Academy of Sciences Beijing100049China Institute of Environment Resource and Soil Fertilizer Zhejiang Academy of Agricultural SciencesHangzhou310021China co.lege of Natural resources and Environment Northwest A&F UniversityYangling712100China Hubei Province Key Laboratory for Geographical Process Analysis and Simulation Central China Normal UniversityWuhan430079China Department of Eco.ydrology Leibniz Institute of Freshwater Ecology and Inland FisheriesBerlin12587Germany Sino-French Institute for Earth System Science College of Urban and Environmental SciencesPeking UniversityBeijing100871China co.lege of resources and environmental Engineering Wuhan University of TechnologyWuhan430070China CAS Center for Excellence in Quaternary Science and Global Change Xi’an710061China

N fertilizer altered bacterial co.munity co.positions by changing soil nutrients.•Bacterial ammonia oxidation became predominated with the increasing N rate.•Excessive N input caused the information of a more co.plex microbial network.•Intensified microbial co.petition by excessive N was due to negative link ***(N)fertilization drives the structure and function of soil microbial co.munities,which are crucial for regulating soil biogeochemical cycling and maintaining eco.ystem *** the N fertilizer effects on soil microbial co.position and diversity have been widely investigated,it is generally overlooked that eco.ystem processes are carried out via co.plex associations among microbiome ***,we examined the effects of five N fertilization levels(0,135,180,225,and 360 kg N ha−1)on microbial co.occurrence networks and key functional taxa such as ammonia-oxidizers in paddy *** results showed that N addition altered microbial co.munity co.position,which were positively related to soil total N and available phosphorus(P)*** abundance of ammonia-oxidizing archaea(AOA)significantly decreased after N addition,whereas ammonia-oxidizing bacteria(AOB)increased in N360 *** with low-N group(N0 and N135),the high-N group(N225 and N360)shaped more co.plex microbial webs and thus improved the stability of the microbial *** least squares path modeling further revealed that N fertilizer had a higher effect on microbial network co.plexity in the high-N group(0.83)than the low-N group(0.49).Although there were more positive links across all microbial networks,the proportion of negative links significantly increased in the high-N network,suggesting that excess N addition aggravated the co.petition among microbial *** these interactions between microbial co.munities and N fertilization advances our understanding of biogeochemical processes in paddy soils and their effects on nutrient supply to

关键词： nitrogen fertilizer paddy soil co.occurrence network microbial interaction

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Promotion mechanism of self-transmissible degradative plasmid transfer in maize rhizosphere and its application in naphthalene degradation in soil

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Journal of environmental Sciences 2022年第5期34卷 240-252页

作者： Qiuyan Jiang Wenwei Lu Lei Zhang Yeqing Jin Yujing Wang Jun Chen Ziyi Ye Ming Xiao Development Center of Plant Germplasm College of Life SciencesShanghai Normal UniversityShanghai 200234China Key Laboratory of Urban Agriculture Ministry of AgricultureShanghai 200240China Department of Food Science Shanghai Business SchoolShanghai 200235China Shanghai Landscape Architecture co.struction co. Ltd.Shanghai 200235China

Rhizospheres can promote self-transmissible plasmid transfer,however,the co.responding mechanism has not received much ***-microbe remediation is an effective way to promote pollutant biodegradation;however,some pollutants,such as naphthalene,are harmful to plants and result in inefficient plant-microbe *** this study,trans-fer of a TOL-like plasmid,a self-transmissible plasmid loaded with genetic determinants for pollutant degradation,among different bacteria was examined in bulk and rhizosphere soils as well as addition of maize root exudate and its artificial root exudate(ARE).The results showed that the numbers of transco.jugants and recipients as well as bacterial metabolic activities,such as xylE mRNA expression levels and catechol 2,3-dioxygenase(C23O)activ-ities of bacteria,remained high in rhizosphere soils,when co.pared with bulk *** number of transco.jugants and bacterial metabolic activities increased with the increasing exudate and ARE co.centrations,whereas the populations of donor and recipient bacteria were substantially unaltered at all *** the experiments co.sistently showed that a certain number of bacteria is required for self-transmissible plasmid transfer,and that the increased plasmid transfer might predominantly be owing to bacterial metabolic activ-ity stimulated by root exudates and ***,ARE addition increased naphthalene degradation by transco.jugants in both culture medium and ***,the co.bined action of a wide variety of co.ponents in ARE might co.tribute to the increased plasmid transfer and naphthalene *** findings suggest that ARE co.ld be an effectively al-ternative for plant-microbe remediation of pollutants in environments where plants cannot survive.

关键词： Degradative plasmid transfer Naphthalene degradation Rhizosphere Root exudates

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Advances in selective co.version of carbohydrates into 5-hydroxymethylfurfural

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Green Energy & Environment 2024年第9期9卷 1384-1406页

作者： Jie Liang Jianchun Jiang Tingting Cai Chao Liu Jun Ye Xianhai Zeng Kui Wang Institute of Chemical Industry of Forest Products Chinese Academy of ForestryNational Engineering Lab.for Biomass Chemical UtilizationNanjing210042China co.Innovation Center of Efficient Processing and Utilization of Forest resources Nanjing Forestry UniversityNanjing210037China co.lege of Energy State Key Laboratory of Physical Chemistry of Solid SurfacesXiamen UniversityXiamen361102China

co.verting carbohydrates into 5-hydroxymethylfurfural(5-HMF) is an attractive and promising route for value-added utilization of agricultural and forestry biomass resource. As an important platform co.pound, 5-HMF possesses high active furan structure with hydroxymethyl and aldehyde group for production of various bio-chemicals and materials, meanwhile, which suffer from low stability and poor yield during the industrial biorefinery process. Hence, selective production of 5-HMF with high-yield and low-co.t has attracted extensive attention from scientific and industrial researchers. This review sorted and described the latest advanced research on solvent and catalyst system, as well as energy field effect for production of 5-HMF with different feedstock in detail, emphatically discussing the solvent effect and its synergistic effect with other aspects. Besides, the future prospects and challenges for production of 5-HMF from carbohydrates were also presented, which provide a profound insight into industrial 5-HMF process with eco.omic and environmental feature.

关键词： 5-Hydroxymethylfurfural Biorefinery Solvent Selectivity Carbohydrate

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