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Geochemistry and geological significance of the Upper Paleozoic and Mesozoic source rocks in the Lower Yangtze region

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Chinese Journal Of Geochemistry 2012年第3期31卷 315-322页

作者： HUANG Yanran ZHANG Zhihuan WU Liyuan ZANG Chunjuan LI Qiong State key laboratory of Petroleum Resource and Prospecting China University of PetroleumBeijing 102249China hunan provmce key laboratory of coal resources clean-utilization and mine environment protection Hunan University of Science and TechnologyXiangtan 411201China Sinopec East China Company Nanjing 210011China

The Lower Yangtze region is one of the important marine sedimentation areas of oil and gas distribution in southern China,for its favorable source rocks,reservoirs and ***,the intense tectonic movements and complex hydrocarbon generation process made it highly impossible to form large-sized oil and gas *** it was divided to different hydrocarbon-bearing preservation units in oil-gas *** study shows that the Permian and Lower Triassic source rocks in the Lower Yangtze region are complicated in *** hydrocarbon generation potential of limestone there is low while argillaceous source rocks are overall of high abundance with excellent organic types,now in the process of hydrocarbon generation,so differences in high maturity influence the evaluation of organic matter abundance and *** characteristics indicate a reductive environment.n-alkanes are marked by a single peak,with no odd-even *** composition and distribution of the carbon numbers of n-alkanes,and the high abundance of long-chain tricyclic terpanes are indicative of marine *** high contents of pregnane,homopregnane,rearranged hopane suggest that the source rocks are of high *** is a good linear correlation between methylphenanthrene index and vitrinite *** correlation of oil-source rocks indicated that the oil of Well HT-3 may come from the Permian Longtan Formation in the Huangqiao area,the oil of Wells Rong-2 and Juping-1 came from the Lower Triassic Qinglong Formation in the Jurong *** exploration here is promising in those different source rocks which all have great potential in hy-drocarbon generating,and oil and gas were produced in the late stage of hydrocarbon generation.

关键词：长江中下游地区烃源岩地球化学特征地质意义上古生界中生界有机质丰度天然气生产

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Mass Loss from Glaciers in the Chinese Altai Mountains between 1959 and 2008 Revealed Based on Historical Maps, SRTM, and ASTER Images

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Journal of Mountain Science 2015年第2期12卷 330-343页

作者： WEI Jun-feng LIU Shi-yin XU Jun-li GUO Wan-qin BAO Wei-jia SHANGGUAN Dong-hui JIANG Zong-li State key laboratory of Cryospheric Sciences Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences University of Chinese Academy of Sciences Department of Geography University of Zürich hunan Province key laboratory of coal resources clean-utilization and mine environment protection Hunan University of Science and Technology

Mass loss of glaciers in the Chinese Altai was detected using geodetic methods based on topographical maps(1959), the Shuttle Radar Topography Mission(SRTM) Digital Elevation Model(DEM)(2000), and the Advanced Space-borne Thermal Emission and Reflection Radiometer(ASTER) stereo images(2008). The results indicate that a continued and accelerating shrinkage has occurred in the Chinese Altai Mountains during the last 50 years, with mass deficits of 0.43 ± 0.02 and0.54 ± 0.13 m a-1 water equivalent(w.e.) during the periods 1959-1999 and 1999-2008, ***, the Chinese Altai Mountains have lost 7.06 ±0.44 km3 in ice volume(equivalent to-0.43 ± 0.03 m a-1 w.e.) from 1959-2008. The spatial heterogeneity in mass loss was potentially affected by comprehensive changes in temperature and precipitation, and had a substantial correlation withglacier size and topographic settings. Comparison shows that in the Chinese Altai Mountains glaciers have experienced a more rapid mass loss than those in the Tianshan and northwestern Tibetan Plateau(TP), and the mass balance of glaciers was slightly less negative relative to those in the Russian Altai, Himalaya, and southern TP.

关键词： Altai Mountains Geodetic method Glacier change Mass balance

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Ion-pair induced solvent extraction of lithium(Ⅰ)from acidic chloride solutions with tributyl phosphate

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Green Energy & environment 2021年第4期6卷 607-616页

作者： Li Cui Lijuan Wang Ming Feng Li Fang Yanxia Guo Fangqin Cheng Institute of resources and environment Engineering State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste ResourcesShanxi UniversityTaiyuan030006China

Lithium(Li)is an important energy metal in the 21st ***,the selective recovery of Li is still a big challenge,especially from acidic solutions with multiple metal ions *** we report a new ion pair induced mechanism for selectively extracting Li^(+)from acidic chloride solutions by tributyl phosphate(TBP).It is shown that the acidity and the chloride ions in the aqueous phase have great effects on the extraction of Li^(+).The FT-IR,UV-Vis and ESI-MS experiments provide solid evidence for the formation of ion-pair complex[Li(TBP)_n(H_(2)O)_(m)]^(+)[FeCl_(4)]^(-)(n-1,2,3;m-0,1)in the organic phase,which brings about the effective and efficient extraction of Li^(+).This mechanism can overcome the Hofmeister bias and allow for the selective extraction of Li^(+) from the extremely hydrophilic *** has also been proved that the loaded Li in TBP can be effectively stripped by concentrated HCl solution with a Li/Fe separation factor>*** understanding of the ion-pair transport mechanism is helpful for optimizing the recovery process or further advancing more efficient recovery techniques for Li from acidic liquor.

关键词： Lithium Ion-pair Tributyl phosphate Acidic chloride solution

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Numerical simulation on optimization of structure and operating parameters of a novel lean coal decoupling burner

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Chinese Journal of Chemical Engineering 2020年第11期28卷 2890-2899页

作者： Jing Wang Ruiping Zhang Fengling Yang Fangqin Cheng Institute of Resource and environment Engineering Shanxi UniversityState Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste ResourcesTaiyuan 030006China

Due to its low volatile characteristics of lean coal,it is difficult to catch fire and burn ***,high temperature is needed to maintain combustion efficiency,while,this leads to high nitrogen oxide *** power plant boilers burning lean coal,stable combustion with lower nitrogen oxide emission is a challenging *** study applied the 3D numerical simulation on the analysis of a novel de-coupling burner for low-volatile coal and its structure and operation parameters *** indicate that although it was more difficult for lean coal decoupling burner to ignite lean coal than high volatile coal,the burner formed a stepwise ignition trend,which promoted the rapid ignition of lean *** of three central partition plate structure shows that in terms of characteristics of the flow field distribution,rich and lean separation and combustion,the structure with an inclination of 0°showed good performance,with its rich-lean air ratio being 0.85 and concentration ratio being 22.94,and there was an apparent decoupling combustion ***,the structure of the selected burner was optimized for its operational *** optimal operating parameters was determined as the primary air velocity of 24.9 m·s^-1 and the mass flow rate of pulverized coal of 2.5 kg·s^-1,in which the pyrolysis products were utilized as reductive agent more ***,the nitrogen oxide was efficiently reduced to nitrogen,which emission concentration was 61.88%lower than that in the design condition.

关键词： Numerical simulation Low-volatile coal De-coupling combustion Lean coal ignition NO_x reduction

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Novel process for facile preparation of mesoporous silica-based materials with controllable pore structure from coal fly ash Author links open overlay panel

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Particuology 2024年第8期91卷 128-137页

作者： Jian-ming Gao Zhen Li Shujia Ma Yuanyuan Zhang Fangqin Cheng Institute of resources and environment Engineering State Environmental Protection Key Laboratory of Efficient Utilization Technology of Coal Waste ResourcesShanxi Collaborative Innovation Center of High Value-added Utilization of Coal-related WastesShanxi UniversityTaiyuan 030006China

Extraction of silica from fly ash to produce mesoporous silica materials is one of the most important utilization *** silica could not be synthesized on a large-scale by conventional sol-gel *** this paper,facile preparation of mesoporous silica with controllable pore structure from fly ash by the template-free process via two steps of mineral phase transformation and selective acid etching was *** influence of crystalline structure and acid etching degree on structure of as-synthesized mesoporous silica materials was revealed,as well as mechanism of crystalline structure transformation and pore structure *** results show that mullite and quartz could be transformed into acid-soluble kaliophilite when fly ash reacted with K_(2)CO_(3)at temperature of 800-1100℃.The hexagonal kaliophilite would be transformed into orthorhombic KAlSiO_(4)-O1 phase when the temperature is controlled at 1100℃.Mesoporous silica with specific surface area of 475.93 m^(2)/g and 642.57 m^(2)/g could be synthesized from activated fly ash with kaliophilite and KAlSiO_(4)-O1 phase crystalline *** controlling the degree of acid etching,mesoporous silica materials with different pore structures can be *** paper provides a cost-effective and large-scale process for the preparation of mesoporous silica materials with controllable pore structure from solid waste fly ash.

关键词： Fly ash Mesoporous silica Crystal transformation Acid etching Controllable pore structure

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Quantifying glacial elevation changes in the central Qilian Mountains during the early 21^(st) century

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Journal of Mountain Science 2021年第11期18卷 2946-2959页

作者： ZHANG Qi-bing MO Cao-hu ZHAO Di JIANG Zong-li CHEN Zhe-fu WU Kun-peng ZHANG Zhen College of Geography and Tourism Hunan University of Arts and ScienceChangde 415000China hunan Province key laboratory of coal resources clean-utilization and mine environment protection Hunan University of Science and TechnologyXiangtan 411201China Institute of International Rivers and Eco-Security Yunnan UniversityKunming 650091China School of Geomatics Anhui University of Science and TechnologyHuainan 232001China

Glaciers in the central Qilian Mountains provide important water resources for the arid Hexi corridor and Qaidam Basin;however,changes in these glaciers interact with climate ***-four bi-static image pairs of TerraSAR-X add-on for Digital Elevation Measurement(TanDEM-X)data,in addition to a Shuttle Radar Topography Mission-C/X band digital elevation model,and the technology of iterative differential synthetic aperture radar interferometry were used to carry out glacier elevation change analysis in the central Qilian Mountains in China during 2000–*** elevation changed with an average rate of(−0.47±0.06)m yr^(−1),while changes in elevation of(−0.51±0.06)m yr^(−1) and(−0.44±0.06)m yr^(−1) were found in the northern(including the Zoulangnan,Tuolai,and Tuolainan mountains)and southern(including the Shulenan and Hark mountains)regions,*** mean temperature has risen by 0.51℃(10 yr)^(−1)in the northern region and 0.48℃(10 yr)^(−1) in the southern region during 1989–2014;however,the change in amplitude of annual precipitation was 2.69 mm yr^(−1) in the northern region and 4.77 mm yr^(−1) in the southern region for the same *** changes can be ascribed as major driving factors for the differences in the changes in glacial elevation in the northern and southern *** types of glaciers existed in the region when considering the change in elevation of the glacial tongue and variation in the position of the glacial terminus:surging,advancing,intensively retreating,and slightly retreating *** elevation decreased more than 20 m on the part of glacier tongue,the glacier terminus position had commonly retreated more than 100 m.

关键词： Central Qilian Mountains Glacial elevation change Climate change TanDEM-X data Iterative differential synthetic aperture radar interferometry

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Experimental investigation and cost assessment of the salt production by solar assisted evaporation of saturated brine

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Chinese Journal of Chemical Engineering 2018年第4期26卷 701-707页

作者： Jing Zhao Huaigang Cheng Xiao Wang Wenting Cheng Fangqin Cheng Institute of resources and environmental Engineering State environment protection key laboratory of Efficient utilization of coal Waste resources Shanxi University Taiyuan 030006 China College of Chemical Engineering Qinghai University Xining 817000 China

The technical feasibility and economy of solar heat collection-forced evaporation process are the keys to its practicality,especially its application in strong brine *** operation cost of applying solar collection in salt manufacturing through depth evaporation of brine has been *** Na^＋,K^＋,Mg^2＋//Cl^-,SO4^2--H2O salt–water system,most of the Na Cl and all of the Carnallite were *** operation cost reached the optimum when the heat collection and evaporation were controlled at 75 and 55℃,*** the solar radiation amount was 19557 kJ·m^-2·d^-1,the solar collector area for producing Carnallite was about 34.27 m^2·（t salt）^-1,and the operation cost was 13 USD·（t salt）^-*** energy consumption of salt manufacturing is at least 25%higher than that of natural *** the economy,the solar assisted salt manufacturing process is recommended to be performed at a production scale of more than 20 tons per day.

关键词： Solar collection Evaporation Brine Salt manufacturing Economy

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Effects of prescribed burning on carbon accumulation in two paired vegetation sites in subtropical China

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Forest Ecosystems 2019年第3期6卷 210-218页

作者： Yuanqi Chen Jianbo Cao Lixia Zhou Feng Li Shenglei Fu hunan Province key laboratory of coal resources clean-utilization and mine environment protection Hunan University of Science and Technology Xiangtan 411201China key laboratory of Ecological Remediation and Safe utilization of Heavy Metal-polluted Soils College of Hunan ProvinceSchool of Life Science Hunan University of Science and Technology Xiangtan 411201 Hunan China key laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical GardenChinese Academy of Sciences Guangzhou 510650China University of Chinese Academy of Sciences Beijing 100049China key laboratory of Geospatial Technology for the Middle & Lower Yellow River Regions Ministry of EducationCollege of Environment and Planning Henan University Kaifeng 475004China

Background: Prescribed burning is a common practice of site preparation before afforestation in subtropical forests. However, the effects of prescribed burning on carbon (C) dynamics of an ecosystem are poorly understood. Therefore, a Eucalyptus urophylla plantation (EU) and a naturally recovered shrubland (NS), each treated with prescribed burning and no burning were examined in subtropical China. Methods: Biomass of trees and shrubs in the 1st, 3nd, 4th, and 6th year after treatments were estimated by quadrat survey and allometric equations. Biomass of herbs and forest floors were estimated by harvest method. Plant biomass C storage was calculated by plant biomass multiplying by its C concentration. Soil organic C (SOC) storage in the 6th year after treatments was estimated by SOC concentration multiplying by soil bulk density and soil volumes. Results: Tree biomass C storage was significantly higher in the burned EU (BEU) than in the unburned EU (UEU) in the 1st year after treatments, yet the difference decreased over time. Conversely, tree biomass C storage was lower in the burned NS (BNS) than in the unburned NS (UNS), although the difference was not significant. However, in the 6th year after treatments, the total plant biomass C storage was 14.56% higher in the BEU than that in the UEU, and 59.93% higher in the BNS than that in the UNS, respectively, although the significant difference was only found between UNS and BNS. In addition, neither SOC storage at 0-20 cm nor ecosystem C storage in either the EU or NS was significantly affected by prescribed burning. Conclusions: Prescribed burning has little impact on overall C storage of forest ecosystems, we consider that prescribed burning may be an option for forest site preparation regarding plant biomass C accumulation.

关键词： Prescribed fire Reforestation Plant biomass carbon Soil organic carbon Forest management

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Effect of land use and land cover change on soil erosion and the spatio-temporal variation in Liupan Mountain Region,southern Ningxia,China

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Frontiers of environmental Science & Engineering 2011年第4期5卷 564-572页

作者： Bin QUAN MJMRÖMKENS Rui LI Fang WANG Jie CHEN Institute of Geospatial Information Science Hunan University of Science and TechnologyXiangtan 411201China State key laboratory of Soil Erosion and Dryland Farming on the Loess Plateau Institute of Water and Soil ConservationChinese Academy of Sciences and Ministry of Water ResourcesYangling 712100China USDA/ARS National Sedimentation LaboratoryP.O.Box 1157OxfordMS 38655USA hunan key laboratory of coal resources clean-utilization and mine environment protection Hunan University of Science and TechnologyXiangtan 411201China State key laboratory of Remote Sensing Science Beijing Normal University/The Institute of Remote Sensing Applications of Chinese Academy of SciencesBeijing 100875China

The Liupan Mountains are located in the southern Ningxia Hui Autonomous Region of China,that forms an important divide between landforms and biogeographic *** populated part of the Liupan Mountain Region has suffered tremendous ecological damage over time due to population pressure,excessive demand and inappropriate use of agricultural land *** present the relationship between land use/cover change and spatio-temporal variation of soil erosion,data sets of land use between the late 1980s and 2000 were obtained from Landsat Thematic Mapper(TM)imagery,and spatial models were used to characterize landscape and soil erosion ***,soil erosion in response to land use and land cover change were quantified and analyzed using data from geographical information systems and remote *** erosion by water was the dominant mode of soil loss,while soil erosion by wind was only present on a relatively small *** degree of soil erosion was classified into five severity classes:slight,light,moderate,severe,and very *** erosion in the Liupan Mountain Region increased between the late 1980s and 2000,both in terms of acreage and ***,severe,and very severe eroded areas accounted for 54.86%of the total land *** lightly eroded area decreased,while the moderately eroded area increased by 368817 ha(22%)followed by severe erosion with 146552 ha(8.8%),and very severe erosion by 97067.6 ha(5.8%).Soil loss on sloping cropland increased with slope *** 90%of the cropland was located on slopes less than 15°.Most of the increase in soil erosion on cropland was due to conversion of steep slopes to cropland and degradation of grassland and increased *** erosion was severe on grassland with a moderate or low grass cover and on dry *** activities,cultivation on steep slopes,and overgrazing of pastures were the main reasons for the increase in erosion severity.

关键词： land use/land cover change soil erosion geographical information system remote sensing Liupan Mountain Region

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Law of surface movement for multi-coal seam strip mining

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Journal of Chongqing University 2014年第4期13卷 122-130页

作者：张立亚 ZHANG Hong-mei hunan Provincial key laboratory of clean coal resources utilization and mine environmental protection Hunan University of Science and Technology Schools of Architecture and Urban Planning Hunan University of Science and Technology

It is an important part of green mining to control the disasters of coal mining which have caused irreversible damages to buildings and ecological environment. Strip mining is one of the efficient measures to control surface subsidence and mining damage. However, the research on the laws of the surface subsidence are still deficient in multi-coal seam strip mining at present. Based on the Fast Lagrangian Analysis of Continua(short for FLAC3D) numerical simulation software, the laws of the surface subsidence and horizontal movement were systematically studied for different depths, different mining widths, different distances between seams, different mining thickness, different parameters between seams and the special relations of the upper pillar and the lower pillar in the vertical direction in multi-seam strip mining. The function relation between the maximum subsidence and the maximum horizontal movement with the depth, the mining width, the seam distance, mining thickness, different parameters between seams and the partial offset are summarized respectively. Finally the formula integrating the surface maximum subsidence value and the maximum horizontal movement was deduced. The results can be used for reference theory and measure in forecasting the surface displacement in multi-coal seam strip mining.

关键词： multi-coal seam strip mining FLAC3D numerical simulation surface maximum subsidence surface maximum horizontal movement

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