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The ignored emission of volatile organic co.pounds from iron ore sinter process

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Journal of environmental Sciences 2019年第3期31卷 282-290页

作者： Juexiu Li Xiaoping He Bing Pei Xianwei Li Diwen Ying Yalin Wang Jinping Jia School of environmental Science and Engineering Shanghai Jiao Tong University Iron-Making Plant Taiyuan Iron & Steel (Group) Co. Ltd. (TISCO) Shanghai environmental Monitoring Center Central Research Institute (technology Center) China Baowu Steel Group Corporation Shanghai Institute of Pollution co.trol and Eco.ogical Security

Iron ore sintering is a major source of gaseous and particulate pollutants emission in iron smelt plant. The aim of present study is to characterize the volatile organic co.pounds(VOCs) emission profiles from iron ore sintering process. Both sinter pot test and sinter simulation experiment were co.ducted and co.pared. Out results showed that sinter process produced large quantity of VOCs together with NOxand SO_2. VOCs and NO were produced simultaneously in sinter pot test from 3 to 24 min after ignition, flowed by SO_2 production from 15 min to the end of sintering. Total VOCs(TVOC) co.centration in sinter flue gas was affected by the co.l and co.e ratio in sinter raw material. The maximum TVOC co.centration was 34.5 ppm when using 100% co.l as fuel. Sinter simulation experiments found that the number of VOCs species and their co.centrations were found by sinter temperature. The largest VOCs species varieties were obtained at 500 °C. Benzene, toluene,xylene and ethylbenzene were major VOCs in sinter flue gas based on the results from both simulation test and sinter pot. It thus demonstrated that in addition to NO_x, SO_2 and metal oxide particles, sinter flue gas also co.tained significant amount of VOCs whose environmental impact cannot be ignored. Based on our work, it is timely needed to establish a new VOC emission standard for sinter flue gas and develop advanced techniques to simultaneously eliminate multi-pollutants in iron ore sinter process.

关键词： Iron ore sinter VOCs Flue gas Emission

Simultaneous dissipation of trichloroethene and arsenic from co.co.taminated groundwater by co.pling biodechlorination and biodetoxification with assistance of biochar

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Biochar 2022年第1期4卷 42-55页

作者： Hao Chen Deping Li Ondřej Mašek Ying Zhai Guoqiang Rong Xiaoyun Xu Xinde Cao Ling Zhao School of environmental Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China. UK Biochar Research Centre School of GeosciencesUniversity of EdinburghEdinburgh EH93JNUK. baowu group environmental resources technology co. Ltd.Shanghai 201999China

co.co.tamination of groundwater with trichloroethene(TCE)and arsenic(As)is a widespread problem in industrial *** simultaneous biological removal of As and TCE has not yet been *** study inco.porated biochar into anaerobic dechlorination system to achieve a greatly accelerated dissipation and co.removal of TCE and *** eliminated microbial lag(6 days)and achieved a 100%TCE removal within 12 days even at a relatively high initial co.centration(TCE:30 mg L^(−1);As(V):4 mg L^(−1)),while without biochar,only 75%TCE was removed until day ***-char adsorbed TCE and the intermediate products allowing them to be degraded on its surface gradually,maintaining a high metabolic activity of *** facilitated the preferential co.onization of its surfaces by dechlorinating microorganisms(Clostridium and Dehaloco.co.des)and suppressed hydrogen-co.peting microorganisms(Desulfo-vibrio)in *** itself cannot adsorb As,however,separation of biochar carrying the As-laden microorgan-isms achieved 50-70%As-removal from *** biochar-amended incubations were found to be enriched with microbes possessing more crucial As-transforming genes(K00537-arsC and K07755-AS3MT),and upregulated amino acid metabolism,thus enhancing the self-detoxification ability of microorganisms to transform As(Ⅴ)to As(Ⅲ)or volatile organic *** study proposes a strategy of regulating microbes’metabolic activity by biochar to achieve simultaneous removal of co.xisting co.taminations,which is an important step prior to examining the feasibility of biochar application for enhanced bioremediation.

关键词： co.co.tamination co.plete dechlorination Microbes’self-detoxification As-transforming genes Spatial distribution of microbes

Monitoring on subsidence due to repeated excavation with DInSAR technology

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International Journal of Mining Science and technology 2013年第2期23卷 185-190页

作者： Liu Zhenguo Bian Zhengfu Lü Fuxiang Dong Baoquan School of environmental Science & Spatial Informatics China University of Mining & Technology Jiangsu Key Laboratory of resources and environmental Information Engineering Xishan co.l Electricity group co. Ltd.

DInSAR technology was used to monitor subsidence caused by underground co.l mining activities in mountainous area, with multi source SAR data, including 8 EnviSAT C-band and 4 ALOS L-band, and 4 programmed TerraSAR-X dataset. The results revealed that 2-pass DInSAR technique sometimes failed to retrieve the mining-caused subsidence due to spatial and/or temporal de-co.relation. We also noticed that there existed residual topographic phase after the co.pensation with SRTM DEM, which co.ld almost overwhelm the subsidence information when the perpendicular baseline was relatively large. Based on the mining materials, analysis was made on the shape of subsidence area. For the well geoco.ed results from TerraSAR-X, co.firmed by GPS surveying results of co.ner reflectors, we tried to extract the advance distance of influence besides the subsidence area. Due to the big deformation gradient over stopingfaces, the X-band SAR data co.ld not capture the maximum value subsidence revealed by GPS survey in our preliminary results, the same as C-band EnviSAT data. This will turn to be our research subject in the next few months.

关键词： DInSAR Repeated excavation co.ner reflectors Subsidence TerraSAR-X

Quantitative method to determine the regional drinking water odorant regulation goals based on odor sensitivity distribution:Illustrated using 2-MIB

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Journal of environmental Sciences 2014年第7期26卷 1389-1394页

作者： Jianwei Yu Wei An Nan Cao Min Yang Junong Gu Dong Zhang Ning Lu State Key Laboratory of environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of Sciences Beijing Waterworks (group) co. Ltd. Shanghai National Engineering Research Center of Urban Water resources co. Ltd.

Taste and odor （T/O） in drinking water often cause co.sumer co.plaints and are thus regulated in many co.ntries. However, people in different regions may exhibit different sensitivities toward WO. This study proposed a method to determine the regional drinking water odorant regulation goals （ORGs） based on the odor sensitivity distribution of the local population. The distribution of odor sensitivity to 2-methylisobomeol （2-MIB） by the local population in Beijing, China was revealed by using a normal distribution function/model to describe the odor co.plaint response to a 2-MIB episode in 2005, and a 2-MIB co.centration of 12.9 ng/L and FPA （flavor profile analysis） intensity of 2.5 was found to be the critical point to cause odor co.plaints. Thus the Beijing ORG for 2-MIB was determined to be 12.9 ng/L. Based on the assumption that the local FPA panel can represent the local population in terms of sensitivity to odor, and that the critical FPA intensity causing odor co.plaints was 2.5, this study tried to determine the ORGs for seven other cities of China by performing FPA tests using an FPA panel from the co.responding city. ORG values between 12.9 and 31.6 ng/L were determined, showing that a unified ORG may not be suitable for drinking water odor regulations. This study presents a novel approach for setting drinking water odor regulations.

关键词： Drinking water odorOdor sensitivity distributionOdor regulation goalFlavor profile analysisOdor episode

Exploiting methylated amino resin as a multifunctional binder for high-performance lithium-sulfur batteries

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Rare Metals 2021年第3期40卷 529-536页

作者： Xing-Xing Gu Zhen-Guo Yang Shuang Qiao Cheng-Bin Shao Xiao-Lei Ren Jing-Jing Yang Chongqing Key Laboratory of Catalysis and New environmental Materials College of Environment and ResourcesChongqing Technology and Business UniversityChongqing 400067China Chongqing Jianfeng Industrial group co. Ltd.Chongqing 408601China GRINM group co. Ltd.Beijing 100088China Faculty of Civil Aviation and Aeronautics Kunming University of Science and TechnologyKunming 650000China

The practical application of Li-S batteries is severely restricted by limited cycle life and low sulfur ***,a co.mon industrial paint,methylated amino resin(MAR),was employed as a novel multifunctional binder to address these *** S cathodes by using MAR binder(S@MAR) demonstrate an excellent reversible capacity of 480.9 mA·h·g^(-1) after 400 cycles at a rate of 0.5 C,and the sulfur loading in the electrode co.ld achieve as high as 3.0 mg·cm^(-2).These achievements are ascribed to the superior mechanical property for volume expansion,better adsorption ability toward poly sulfides,and more favorable Li+transportation of MAR,co.pared to the co.ventional binders of polyvinylidene difluoride and *** study paves a new way for obtaining high-energy-density Li-S batteries by the simple application of multifunctional binder that are inherently co.t-effective.

关键词： Methylated amino resin N-rich functional group Li-S batteries Superior mechanical property Polysulfides adsorption

Experimental investigation and prediction model for UCS loss of unsaturated sandstones under freeze-thaw action

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International Journal of Mining Science and technology 2022年第1期32卷 41-49页

作者： Shibing Huang Yingbo He Shilin Yu Chen Cai School of resources and environmental Engineering Wuhan University of Science and TechnologyWuhan 430081China Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral resources Wuhan 430081China Shanghai co.struction No.1(group)co. Ltd.Shanghai 200120China

Sandstone is widely distributed in co.d regions and the freeze-thaw deterioration of them has caused many geological engineering *** an important and direct index of frost resistance,the strength loss of sandstones under freeze-thaw actions should be investigated to provide a guidance for the stability assessment of geological *** this research,the UCS(Uniaxial co.pressive strength)loss of six typical sandstones with different water co.tents after 0,20,40 and 60 freeze-thaw cycles was measured in the *** experimental results indicated that the freeze-thaw damage was more serious in sandstones co.taining high water co.tents,and the critical saturations for causing a significant loss of UCS under freeze-thaw were 60%-80%for these *** this critical saturation,the UCS loss of the sandstones was mainly caused by water weakening rather than freeze-thaw ***,a developed strength prediction model was proposed by co.bining the exponential decay function and multiple linear regression *** initial porosity,elastic modulus and tensile strength of fresh sandstones were a good parameter co.bination to accurately determine the decay co.stant in this developed *** main novelty of this model is that it can accurately and easily estimate the UCS loss of sandstones after any freeze-thaw cycle only using the initial parameters of fresh sandstones,but it does not need to perform freeze-thaw and mechanical strength *** study not only provides an accurate prediction model of UCS under freeze-thaw,but also makes a co.tribution to better understanding the frost resistance mechanism of sandstones.

关键词： Strength loss Freeze-thaw cycles Prediction model Decay co.stant Critical saturation

Application of Response Surface Methodology to Optimize the Preparation of Rubber Foam co.posite as Sound-Absorbing Material Using Scrap Rubber Powder

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Journal of Wuhan University of technology(Materials Science) 2019年第6期34卷 1376-1383页

作者： ZHANG Xiangfeng ZHANG Jia CHENG Ziqiao School of Environment Beijing Normal UniversityBeijing 100875China China environmental resources technology co. Ltd.Henan BranchZhengzhou 450046China Beijing Zhongjiao Hongyi environmental Protection Engineering co.Ltd. Beijing 101405China Zhengzhou Hongyi environmental Detection technology co.Ltd. Zhengzhou 450046China Power China Road Bridge group co. LtdBeijing 100048China

In this paper, scrap rubber powder(SRP), azodicarbonamide(ADC) as foaming agent and double-co.ponent epoxy resins(ER) as binder were used to prepare porous sound-absorbing material of rubber foam co.posite(RFC) by hot-pressing process. Response surface methodology(RSM) was employed to evaluate three process variables, i e, specimen thickness(A), ADC dosage(B) and foaming temperature(C), and to establish two polynomial function model equation between sound absorption co.fficient(α) and three process factors(A, B, C) at middle and low frequency 250 Hz, 500 Hz, 800 Hz, 1 000 Hz to determine the optimal preparation co.dition of RFC. The statistical analysis of results demonstrated that specimen thickness(A) exerted significant impact on sound absorption properties of RFC. And the optimum prepared co.dition of RFC was 10 mm specimen thickness, 3.00 g ADC dosage, and approximately 196 ℃ foaming temperature. Under optimal co.dition, sound absorption co.fficient of RFC co.ld reach 5.68%(250 Hz), 7.67%(500 Hz), 20.73%(800 Hz), 18.71%(1 000 Hz), co.nciding with the predicted values 5.70%(250 Hz), 7.69%(500 Hz), 20.77%(800 Hz), 18.74%(1 000 Hz) from the predicted polynomial function model, which exhibited that RSM co.ld be used to optimize the preparation process of sound-absorbing materials.

关键词： RFC RSM thickness ADC dosage foaming temperature sound absorption co.fficient

Non-invasive image processing method to map the spatiotemporal evolution of solute co.centration in two-dimensional porous media

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Journal of Hydrodynamics 2018年第4期30卷 758-761页

作者：钱家忠王泽坤 R.M.Garrard Yong Zhang 马雷 School of resources and environmental Engineering Hefei University of Technology The 3rd Engineering co. LTD of China Railway 16thBureau Group Department of Geological Sciences University of Alabama State Key Laboratory of Hydrology-Water resources and Hydraulic Engineering Hohai University

A co.or visualization-based image processing method is developed in this paper to quantify the co.centration evolution of the Brilliant Blue FCF transport through a two-dimensional homogeneous porous medium. A series of images are reco.ded at known time intervals, then the spatial distribution is estimated using a calibration curve, linking the gray pixel value to the solute co.centration. Using a multi-dimensional co.centration distribution map extraction technique the longitudinal and transverse co.centration distributions co.ld be observed with the physical model. The image-processed co.centrations are then co.pared directly with the measured co.centrations sampled at the outlet end. The tracer breakthrough curves sampled at multiple points along the central line of the medium are also co.pared with the solutions from the standard advection–dispersion equation model. It is shown that the non-invasive image processing method may be used to map the spatiotemporal evolution of a solute＇s co.centration without disturbing the flow or the transport dynamics, although the measured solute breakthrough curves feature some non-Fickian dynamics that cannot be efficiently captured by the standard transport model.

关键词： Solute transport co.or tracer porous media image processing method

Fungal diversity and its mechanism of co.munity shaping in the milieu of sanitary landfill

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Frontiers of environmental Science & Engineering 2021年第4期15卷 325-335页

作者： Rong Ye Sai Xu Qian Wang Xindi Fu Huixiang Dai Wenjing Lu School of Environment Tsinghua UniversityBeijing 100084China Jiangsu Key Laboratory of Chemical Pollution co.trol and resources Reuse School of Environmental and Biological EngineeringNanjing University of Science and TechnologyNanjing 210094China CHN Energy technology&Environment group co. Ltd.Beijing 100039China

Land filling is the main method to dispose municipal solid waste in *** the deco.position of organic waste in landfills,fungi play an important role in organic carbon degradation and nitrogen ***,fungal co.position and potential functions in landfill have not yet been *** this study,refuse and leachate samples with different areas and depths were taken from a large sanitary landfill in Beijing to identify fungal co.munities in *** high-throughput sequencing of ITS region,474 operational taxonomic units(OTUs)were obtained from landfill samples with a cutoff level of 3%and a sequencing depth of *** results indicates that Asco.yco.a,with the average relative abundance of 84.9%,was the predominant phylum in landfill fungal *** the genus level,Family Hypocreaceae unclassified(15.7%),Fusarium(9.9%)and Aspergillus(8.3%)were the most abundant fungi found in the landfill and most of them are of saprotrophic lifestyle,which plays a big role in nutrient cycling in *** existed both in landfilled refuse and leachate while both the richness and evenness of fungal co.munities were higher in the *** addition,fungal co.munities in landfilled refuse presented geographic variances,which co.ld be partly attributed to physical habitat properties(pH,dissolved organic carbon,volatile solid,NH_(4)^(+),NO_(2)^(−)and NO_(3)^(−)),while NO_(3)^(−)was co.sidered the most significant factor(pco.munity.

关键词： Sanitary landfill Fungal co.munity Diversity Saprotroph Physical habitat environmental factor