Continuous biological removal of selenate in the presence of cadmium and zinc in UASB reactors at psychrophilic and mesophilic conditions
作者：
Zeng, Taotao* ;Rene, Eldon R.;Hu, Qing;Lens, Piet N. L.
期刊：
Biochemical Engineering Journal ,2019年141:102-111 ISSN：1369-703X
通讯作者：
Zeng, Taotao
作者机构：
[Rene, Eldon R.; Zeng, Taotao; Lens, Piet N. L.] UNESCO, IHE Inst Water Educ, POB 3015, NL-2601 DA Delft, Netherlands.;[Zeng, Taotao; Hu, Qing] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang 421001, Peoples R China.
通讯机构：
[Zeng, Taotao] U;UNESCO, IHE Inst Water Educ, POB 3015, NL-2601 DA Delft, Netherlands.
关键词：
Anaerobic granules sludge;Heavy metals;Microbial community;Se(VI);Upflow anaerobic sludge blanket (UASB) reactor
摘要：
This study investigated the continuous biological removal of selenate [Se(VI)] in the presence of cadmium [Cd(II)] and zinc [Zn(II)] by anaerobic granular sludge in two upflow anaerobic sludge blanket (UASB) reactors operating under psychrophilic (17.5 ± 0.4 ℃) and mesophilic (30 ± 0.5 ℃) conditions for 42 and 74 days, respectively. Se(VI) and total selenium (Se) removal efficiencies reached, respectively, 99.6% and 95.0% in the UASB reactor operating at psychrophilic conditions. Cd(II) and Zn(II) removal efficiencies by the mesophilic UASB reactor reached, respectively, 99.2% and 96.2%. In the presence of Cd and/or Zn in the influent, both Se(VI) and total Se had a higher removal efficiency than when solely feeding Se(VI), both at 17.5 ℃ and 30 ℃. The lactate removal rates of the UASB reactors amounted to 1.0–1.2 mM/h. The mass balance showed 64.8%–79.5% of the supplied Se was entrapped in the biomass at the end of the experiment. The polysaccharides and protein concentrations of the extracellular polymeric substances (EPS) increased ∼3 to 5 times upon heavy metal exposure. A dramatic change in the microbial community occurred in the UASB reactors during long term operation. This study showed that UASB reactors have desirable Se(VI), Cd(II) and Zn(II) removal efficiencies both at 17.5 and 30 ℃. © 2018 Elsevier B.V.
语种：
英文
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Bacterial community analysis of sulfate-reducing granular sludge exposed to high concentrations of uranium
作者：
Zeng, Taotao* ;Zhang, Shiqi;Liao, Wei;Ma, Hualong;Lens, Piet N. L.;...
期刊：
Journal of Water Supply Research and Technology. Aqua Online ,2019年68(8):645-654 ISSN：1606-9935
通讯作者：
Zeng, Taotao
作者机构：
[Liao, Wei; Xie, Shuibo; Zeng, Taotao; Zhang, Shiqi; Ma, Hualong] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang, Peoples R China.;[Lens, Piet N. L.] UNESCO IHE Inst Water Educ, Delft, Netherlands.;[Xie, Shuibo] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang, Peoples R China.
通讯机构：
[Zeng, Taotao] U;Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang, Peoples R China.
关键词：
bacterial population;community structure;high-throughput sequencing;sulfate-reducing granular sludge;uranium exposure
摘要：
Sulfate-reducing granular sludge was used for uranium-contaminated wastewater treatment and the responsible microbial community was analyzed. Four feedings, with 6 days for every feeding and 20 mg/L initial uranium, were provided at 27.5 (±2.5) oC. After the four feedings, a uranium removal efficiency of 94% was obtained. Environmental scanning electron microscopy (ESEM) showed that short rod bacteria were the dominant microorganisms in the granular sludge. X-ray energy dispersive spectroscopy (EDS) confirmed the presence of uranium on the granular surface. High-throughput sequencing was carried out for analyzing the bacterial diversity and community structure. The total data set comprised 8,290 high quality sequences, which could be divided into 605 operational taxonomic units (OTUs). The library coverage was 0.96 and the alpha diversity indices of ACE, Chao1, Shannon and Simpson were 2,255.40, 1,346.12, 4.03 and 0.05, respectively. There were 13 bacterial genera present with a ratio of more than 1% of the total 124 genera, among which Desulfovibrio (16.48%), Clostridium IV (9.29%), Bacteroides (3.46%) and Citrobacter (1.41%) were assumed as the functional bacteria, with a cumulative proportion of 30.64% of the total bacterial population. The results provide insights into the bacterial community of sulfate-reducing granular sludge exposed to high concentrations of uranium (20 mg/L). © IWA Publishing 2019
语种：
英文
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Experimental Study on the Mechanical Properties and Crack Propagation of Jointed Rock Mass Under Impact Load
作者：
Zeng, Sheng;Jiang, Bowei;Sun, Bing
期刊：
Geotechnical and Geological Engineering ,2019年37(6):5359-5370 ISSN：0960-3182
通讯作者：
Sun, Bing(sunbingnh@126.com)
作者机构：
[Zeng, Sheng; Jiang, Bowei] School of Resource Environment and Safety Engineering, University of South China, Hengyang;421001, China;[Sun, Bing] School of Civil Engineering, University of South China, Hengyang;[Zeng, Sheng; Jiang, Bowei; Sun, Bing] 421001, China
通讯机构：
[Bing Sun] S;School of Civil Engineering, University of South China, Hengyang, China
关键词：
Crack propagation;Dynamic deformation;Impact load;Jointed rock mass;Rock mechanics
摘要：
A drop hammer impact test on jointed rock masses is carried out in this study. According to the analysis of the effect of different joints on the strength, the deformation and the damage of jointed rock masses, the law of the mechanical properties and crack propagation of jointed rock masses is observed under impact load. First, when the dip angle and the number of the joint are greater, the dynamic bearing capacity of rock masses will be weaker. Meanwhile the deformation and the damage of rock masses will increase. Then, when the impact load is small, the dynamic compression deformation of jointed rock mass is mainly due to the normal closure of joints. After the impact load increased, more microcracks are produced around the joints. These cracks will gradually spread along the joints and finally lead to the damage of jointed rock masses. Besides, the joint can increase the stress waves energy dissipation and weaken the propagation of the stress waves in the rock mass. The study provides a reference for the dynamic analysis of fractured rock masses and the excavation support of surrounding rock mass in deep mining of mines. © 2019, Springer Nature Switzerland AG.
语种：
英文
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全域旅游背景下乡村旅游发展现状研究--以衡阳市为例
作者：
行云珩;李晟;王志远;吴博;廖建军
期刊：
中外建筑 ,2019年(3):54-56 ISSN：1008-0422
作者机构：
南华大学土木工程学院;南华大学建筑学院;南华大学设计艺术学院;[王志远; 行云珩; 吴博; 李晟; 廖建军] 南华大学
关键词：
全域旅游;旅游发展;乡村;衡阳市
摘要：
随着全域旅游的发展,旅游业在我国国民经济中的地位不断提升。衡阳市作为湖南省以及西南地区重要的交通枢纽城市,有着得天独厚的发展优势,更有南岳衡山等游览胜地。本文基于衡阳市历年旅游业的相关数据,对衡阳市旅游发展的现状问题进行分析研究,提出并探索衡阳市乡村旅游健康发展的有效途径。
语种：
中文
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以人为本，新旧传承——解读南华大学雨母校区入口空间设计
作者：
刘嘉树;黄春华;胡夏然
期刊：
中外建筑 ,2019年(11):124-127 ISSN：1008-0422
作者机构：
南华大学土木工程学院;湖南南华大学建筑学院;南华大学建筑学院;[胡夏然; 黄春华; 刘嘉树] 南华大学
关键词：
高校入口空间;大门;环境设计;新校区
摘要：
作为城市环境中的一部分,高校入口空间不仅是整个校园的肇始和开端,还是城市空间的枢纽与点缀.本文以南华大学雨母校区入口空间设计为例,通过对大门前广场和大门建筑主体两方面进行分析,主要从用地的地势地貌、前广场的内向性与外在性、活动场地的场所感与人性化以及大门建筑主体的穿行功能、安全功能和文化功能等方面加以探索.思考了新校区入口空间如何在场所的适应性与文化的标识性等方面满足人的基本需求并与老校区产生联系.利用当代空间环境设计的创作理念与设计手法,塑造出新环境中的高校入口空间.
语种：
中文
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Synthesis of polyethylenimine/graphene oxide for the adsorption of U(VI) from aqueous solution
作者：
Liu, Hongjuan* ;Zhou, Yuancheng;Yang, Yibo;Zou, Ke;Wu, Renjie;...
期刊：
Applied Surface Science ,2019年471:88-95 ISSN：0169-4332
通讯作者：
Liu, Hongjuan;Xie, Shuibo
作者机构：
[Xia, Ke; Liu, Hongjuan; Yang, Yibo; Wu, Renjie; Zhou, Yuancheng; Zou, Ke] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Xie, Shuibo; Liu, HJ] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.;[Xie, Shuibo] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Reu, Hengyang 421001, Peoples R China.
通讯机构：
[Liu, HJ; Xie, SB] U;Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China.
关键词：
Adsorption;Graphene oxide;Polyethyleneimine;U(VI)
摘要：
Polyethyleneimine (PEI)/graphene oxide (GO) was synthesized through a self-assembly method with the formation of the amide group –CONH– between –NH 2 on PEI and –COOH on GO. The formation was confirmed by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The oxygen- and nitrogen-containing functional groups of PEI/GO were involved in the adsorption of U(VI), as determined under the FT-IR and XPS analyses of PEI/GO and U(VI)-adsorbed PEI/GO. The pH, contact times, and initial concentration, which are the factors influencing the removal of U(VI), were investigated. The adsorption of U(VI) onto PEI/GO was fitted well with the pseudo-second-order kinetic model and Langmuir isotherm model. The maximum sorption capacities of U(VI) on PEI/GO (145.14 mg·g −1 ) at pH = 7 and T = 303 K were higher than that of U(VI) on GO (94.61 mg·g −1 ). This study provides a novel and simple method for synthesizing GO derivatives with efficient adsorption performances of U(VI) from aqueous solution. © 2018
语种：
英文
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Indoor thermal environment due to non-steady-state radiation heat transfer of a capillary ceiling radiation cooling system
作者：
Xie, Dong;Tian, Ling;Yu, Chuck Wah;Liao, Maili;Wang, Hanqing*
期刊：
Indoor and Built Environment ,2019年28(4):443-453 ISSN：1420-326X
通讯作者：
Wang, Hanqing
作者机构：
[Xie, Dong; Wang, Hanqing; Tian, Ling; Liao, Maili] Univ South China, Sch Civil Engn, Hengyang, Hunan, Peoples R China.;[Yu, Chuck Wah] ISBE, Milton Keynes, Bucks, England.
通讯机构：
[Wang, Hanqing] U;Univ South China, Sch Civil Engn, Hengyang, Hunan, Peoples R China.
关键词：
Capillary ceiling panel;Radiant cooling;Radiant heat transfer;Ceiling temperature;Steady-state time;Indoor air temperature;Nonsteady-state
摘要：
The capillary ceiling radiation cooling panel (C-CRCP) is a newly developed terminal device for air conditioning to provide indoor thermal comfort for occupants and to save energy. In this paper, numerical modelling of a room with a C-CRCP system was used to analyze radiant heat transfer under non-steady-state conditions. Experiments were conducted in an environmental chamber to verify simulation results. The chamber was equipped with a C-CRCP, which was covered with gypsumboard. The results showed that the inlet water temperature had a significant influence on ceiling surface temperature. The ceiling surface temperature and the steady-state time were increased with higher inlet water temperature. A vertical gradient in indoor air temperature was found. Ceiling surface temperature and indoor air temperature were increased with an increase in inlet air temperature. The energy supply rate of the radiant panel had a positive correlation with chilled water velocity. The amount of radiation was double the amount of convection, and the thickness of the gypsumboard had virtually no effect on the proportions of radiation and convection. The model was considered validated since the maximum relative errors between experimental data and simulation results of inlet water temperature and supply air conditions were within 10%. © The Author(s) 2018.
语种：
英文
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Synthesis of X-Zeolite from Waste Basalt Powder and its Influencing Factors and Synthesis Mechanism.
作者：
Ke, Guojun;Shen, Haichen;Yang, Pengfei*
期刊：
Materials ,2019年12(23) ISSN：1996-1944
通讯作者：
Yang, Pengfei
作者机构：
[Shen, Haichen; Ke, Guojun] Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China.;[Shen, Haichen; Ke, Guojun] Univ South China, Key Lab Special High Performance Concrete, Hengyang 421001, Peoples R China.;[Yang, Pengfei] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Yang, Pengfei] U;Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
basalt;mechanism;synthesis;zeolites
摘要：
Traditional hydrothermal method (TH) and alkali fusion-assisted hydrothermal method (AFH) were evaluated for the preparation of zeolites from waste basalt powder by using NaOH as the activation reagent in this study. The synthesized products were characterized by BET, XRD, FTIR and SEM. The effects of acid treatment, alkali/basalt ratio, calcination temperature and crystallization temperature on the synthesis process were studied. The results showed that AFH successfully synthesized zeolite X with higher crystallinity and no zeolite was formed by TH. The specific surface area of synthetic zeolite X was 486.46 m(2).g(-1), which was much larger than that of original basalt powder (12.12 m(2).g(-1)). Acid treatment and calcination temperature had no effect on zeolite types, but acid treatment improved the yield and quality of zeolite. Alkali/basalt ratio and crystallization temperature not only affected the crystallinity of synthesized zeolites but also affected its type. The optimum synthesis condition of zeolite X are as follows: acid treatment of 5 wt% HCl solution, NaOH/basalt ratio of 1:1, a calcination temperature of 650 degrees C and crystallization temperature of 120 degrees C. The work shows that basalt can be used as a raw material to prepare zeolite.
语种：
英文
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风光互补高速公路电动汽车无线充电系统的研究
作者：
崔巍;陈姝伊;蒋盼盼
期刊：
电气时代 ,2019年(6):122-124 ISSN：1000-453X
作者机构：
南华大学土木工程学院;[蒋盼盼; 陈姝伊; 崔巍] 南华大学
关键词：
无线充电系统;电动汽车;高速公路;风光互补;全球环境;续航能力;互补原理;长途行驶
摘要：
<正>随着全球环境和能源问题的日益凸显,发展新能源电动汽车变得越发重要。为解决电动汽车续航能力差这一难题,研究在电动汽车长途行驶的服务区建立基于风光互补原理的电动汽车无线充电系统,充分利用高速公路地段的环境优势,将光能、风能转化为电能供电动汽车使用,达到为电动汽车续航的目的。
语种：
中文
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超声波与化学方法协同去除铀矿冶设备表面放射性污染研究
作者：
王红强;胡鄂明;王清良;金圣;刘宇;...
期刊：
南华大学学报(自然科学版) ,2019年33(4):1-5 ISSN：1673-0062
作者机构：
南华大学资源环境与安全工程学院;[胡锦明] 中核二七二铀业有限责任公司;南华大学土木工程学院;[陈宽; 刘宇; 周耀辉; 胡鄂明; 王清良; 王红强; 金圣] 南华大学
关键词：
超声波;化学方法;协同去除;放射性污染;铀矿冶
摘要：
核设施中的设备在运行过程中会受到不同程度的放射性污染,因此,需要对污染的设备进行去污处理。采用超声波与化学方法协同去除聚氯乙烯(PVC)板、有机玻璃、不锈钢和橡胶等几种核设施常用材质表面放射性污染,并考察了去污时间、硝酸质量分数、清洗温度和有无超声波辅助等因素对去污效果的影响,研究结果表明:延长去污时间、增加硝酸质量分数、提高清洗温度和超声波辅助均能有效提高去污效果,该结果对于核设施表面放射性污染的去污具有重要的指导意义。
语种：
中文
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Preparation of CNTs/MgAl-LDHs Composites and their Adsorption Properties for Chloride Ions
作者：
Guo Jun Ke;Zhou Zhou;Peng Fei Yang;Bai Xing Song
期刊：
Materials Science Forum ,2019年956:305-313 ISSN：0255-5476
通讯作者：
Yang, P.
作者机构：
School of Civil Engineering, University of South China, Hengyang, Hunan 421001, China;School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China
通讯机构：
School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan, China
关键词：
Adsorption;Carbon nanotubes;Chloride ion;Functional materials;Mg/Al-hydrotalcite
摘要：
Magnesium-aluminum hydrotalcite and carbon nanotube composites (CNTs/MgAl-LDHs) were prepared by one-step hydrothermal method using magnesium nitrate, aluminum nitrate and carbon nanotubes as raw materials and urea as precipitant. The samples were characterized by SEM, XRD, BET and other methods. The adsorption properties of CNTs/MgAl-LDHs on chloride ions and the factors affecting the adsorption of chloride ions were studied. The results show that the prepared CNTs/MgAl-LDHs exhibit a three-dimensional honeycomb structure with a specific surface area of 103.019 m2 /g, which is larger than the specific surface area of MgAl-LDHs of 84.344 m2 /g. The results showed that the optimal adsorption conditions were: adsorption temperature was 45℃, the pH value was 8, the adsorption time was 100 min, the Cl- concentration was 0.01 M (584 mg/L), and the adsorbent concentration was 1.0 g/L. CNTs/MgAl-LDHs has the best adsorption performance for chloride ions. The maximum adsorption capacity is 75.58 mg/g. The adsorption isotherms and adsorption kinetics are consistent with the Langmuir isotherm model and the quasi-secondary kinetic model. © 2019 Trans Tech Publications Ltd, Switzerland.
语种：
英文
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浅论慕课（MOOC）教学与传统教学之差异
作者：
李子龙;杨建明;伍琼芳
期刊：
科教导刊 ,2019年(3):52-54 ISSN：1674-6813
作者机构：
南华大学土木工程学院 湖南·衡阳 421001;[伍琼芳; 杨建明; 李子龙] 南华大学
关键词：
慕课;传统教学;对比分析;网络化教学
摘要：
随着网络信息的飞速发展,慕课（大规模开放网络在线课程）应运而生并迅速发展,对我国传统教育产生了重要影响。本文从慕课在中国的发展情况出发,通过比较慕课教学方法和传统教学方法在特征和成本方面的优缺点,为慕课在教育中的影响和未来发展提供了启示。
语种：
中文
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混凝土裂缝化学激励愈合试验研究
作者：
彭成;朱武俊;夏清;陈国梁;欧阳曾辉
期刊：
硅酸盐通报 ,2019年38(12):3801-3806 ISSN：1001-1625
作者机构：
南华大学土木工程学院,衡阳421001;[朱武俊; 彭成; 陈国梁; 欧阳曾辉; 夏清] 南华大学
关键词：
裂缝;氧化镁;硫酸钠;化学激励;自愈合龄期;强度
摘要：
对不同掺量氧化镁混凝土试块预制裂缝并在不同浓度硫酸钠溶液中进行养护试验,利用超声波综合回弹法测量带缝试块回弹波速,对比分析不同养护龄期时试块的波速和抗压强度的变化,研究了氧化镁和硫酸钠对混凝土裂缝自愈合性能的化学激励作用。结果表明:掺氧化镁和硫酸钠溶液养护均能延长混凝土裂缝的自愈合龄期;掺氧化镁混凝土裂缝的28 d强度恢复率随氧化镁掺量增加而提高;试块28 d强度恢复率随硫酸钠溶液浓度增加而显著增长;在28 d养护龄期内,掺12%氧化镁混凝土试块在6%硫酸钠溶液中养护后,抗压强度恢复率最高。
语种：
中文
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千米级缆拱组合桥概念设计研究
作者：
谢肖礼;马骉;李国平;覃霞;孙长军;...
期刊：
重庆交通大学学报(自然科学版) ,2019年38(1):7-13 ISSN：1674-0696
作者机构：
广西大学土木建筑工程学院,广西南宁,530004;上海市政工程设计研究总院有限公司总工程师办公室,上海,200002;同济大学桥梁工程系,上海,200092;柳州欧维姆机械股份有限公司同济OVM研究中心,广西柳州,545000;南华大学土木工程学院,湖南衡阳,421001
关键词：
桥梁工程;缆拱桥;拱肋;主缆;锚体;概念设计
摘要：
采用给拱肋卸载及悬索桥不设锚碇的理念,提出一种新的桥梁结构体系--缆拱组合桥,其主要由主拱、主缆、主塔、边拱及主梁组成。通过选取适宜的垂跨比、矢跨比、拱轴线等参数来调整拱和缆分担主跨桥面荷载的比例,让缆承担更多荷载,从而拱肋得到大幅度卸载,既降低了其应力水平,又提高了稳定性,使缆拱桥的跨径可以超越拱桥。以1 008 m跨径为例,对缆拱桥进行概念设计,并通过有限元研究其结构强度、刚度、稳定性等问题。研究表明:缆拱桥不仅保留了悬索桥承载力高、拱桥刚度大的特点,同时还具有一定的美学价值。
语种：
中文
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南方沿海城市海绵城市建设系统策略探索
作者：
孙波;谢水波;刘慧
期刊：
水利规划与设计 ,2019年(11):24-27,53 ISSN：1672-2469
作者机构：
南华大学建筑学院,湖南衡阳421001;南华大学土木工程学院,湖南衡阳421001;[谢水波; 孙波; 刘慧] 南华大学
关键词：
海绵城市;海绵体系;排水系统;智慧水务;大数据分区;规划策略
摘要：
文章以深圳市为例,重点分析南方沿海城市,尤其是发达地区的城市在经历了城市社会经济高速发展时期后,所面临的城市水体污染以及防洪排涝压力,以及在深圳进入存量规划阶段后由于大量城市更新项目带来的新的市政设施压力等,由此导致城市面临生态保育不足的现状。从提出完善海绵城市建设所需数据库入手,构建完整海绵体系和防洪排涝体系,统筹智慧水务监测控制系统与社会服务应用以及海绵城市建设目标,分区建设,缓解城市内涝,减少其对于城市快速发展的影响。以期在未来南方沿海城市的海绵城市建设中起到前瞻引导作用。
语种：
中文
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加压排水系统水泵启停工况瞬态分析
作者：
李青青;黄仕元;王艳辉;黄筱
期刊：
水利规划与设计 ,2019年(11):137-141 ISSN：1672-2469
作者机构：
南华大学土木工程学院,湖南衡阳421001;[王艳辉; 李青青; 黄仕元; 黄筱] 南华大学
关键词：
水力特性;加压管道;水泵
摘要：
文章应用基于流体网络基本原理编制的一维流体系统仿真软件Flowmaster,对加压排水管道中水泵在不同工况下的水力变化特性进行研究。结果表明,系统正常运行中当有水泵在启动或停止瞬间,其它水泵的流量会发生剧烈波动,势必引起整个管道系统压力的剧烈变化,可能产生水锤对系统的安全稳定运行造成巨大威胁。合理设计空气阀可以有效减小系统流量波动,保证压力排水系统稳定运行。
语种：
中文
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Failure Prediction of Two Types of Rocks Based on Acoustic Emission Characteristics
作者：
Sun, Bing;Hou, Shanshan;Xie, Jiehui;Zeng, Sheng*
期刊：
Advances in Civil Engineering ,2019年2019 ISSN：1687-8086
通讯作者：
Zeng, Sheng
作者机构：
[Hou, Shanshan; Sun, Bing] Univ South China, Sch Civil Engn, Hengyang 421001, Hunan, Peoples R China.;[Xie, Jiehui] South China Univ Technol, Sch Civil Engn & Transportat, Guangzhou 430071, Guangdong, Peoples R China.;[Zeng, Sheng] Univ South China, Sch Resource & Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Zeng, Sheng] U;Univ South China, Sch Resource & Environm & Safety Engn, Hengyang 421001, Hunan, Peoples R China.
摘要：
The stability analysis of rock is an important basis to ensure the safe exploitation of underground resources and the reliable operation of space engineering. Uniaxial compression and acoustic emission (AE) tests were carried out on two common rock samples with strong rock burst tendency. The relationship between mechanical characteristics, AE characteristics, and rock burst tendency in the failure process of rock with different body types and the evolution of fractal characteristics of AE parameters were discussed. Based on the cusp mutation theory, the catastrophe model of AE characteristic parameters was established to quantify the instability mechanism of rock mass. The results show that the AE mutation rate (AEMR) of the cubic specimens increase from a low level to a high level gradually in the stable fracture stage, while that of the cylindrical specimens increase sharply to the maximum when the specimens are near failure. The AE cumulative energy curves of cubic specimens show a "step" rise, while that of cylindrical specimens show a "gradual" rise, and the rock burst process of cubic specimens is faster. The fractal dimension evolution mode of AE characteristic parameters of cubic specimens during uniaxial compression text is decline-rise-decline, while that of cylindrical specimen is decline-rise-decline-steeply rise. According to the periodic change of AE cumulative energy curve, combined with the rock failure cusp mutation model, the occurrence of rock burst can be well predicted, providing certain theoretical guidance for the stability analysis of underground engineering rock mass. © 2019 Bing Sun et al.
语种：
英文
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The Latest Research Progress of Green Building Materials in Lead and Zinc Tailings
作者：
Liu, Qing;Li, Yuan* ;Zhao, Guodong
期刊：
IOP Conference Series: Earth and Environmental Science ,2019年267(5) ISSN：1755-1307
通讯作者：
Li, Yuan
作者机构：
[Li, Yuan; Liu, Qing] Univ South China, Sch Civil Engn, Heng Yang 421001, Hunan, Peoples R China.;[Zhao, Guodong] Univ South China, Sch Resource Environm & Safety Engn, Heng Yang 421001, Hunan, Peoples R China.
通讯机构：
[Li, Yuan] U;Univ South China, Sch Civil Engn, Heng Yang 421001, Hunan, Peoples R China.
会议名称：
3rd International Workshop on Renewable Energy and Development (IWRED)
会议时间：
MAR 08-10, 2019
会议地点：
Guangzhou, PEOPLES R CHINA
会议主办单位：
[Liu, Qing;Li, Yuan] Univ South China, Sch Civil Engn, Heng Yang 421001, Hunan, Peoples R China.^[Zhao, Guodong] Univ South China, Sch Resource Environm & Safety Engn, Heng Yang 421001, Hunan, Peoples R China.
会议论文集名称：
IOP Conference Series-Earth and Environmental Science
摘要：
In recent years, researchers at home and abroad have used lead-zinc tailings to prepare green building materials for analysis. The main discussion on the preparation of geopolymers and foamed ceramics from lead-zinc tailings is given. The heavy metal curing and radiation-proofing ability of lead-zinc tailings-based building materials are briefly introduced. The results show that the lead-zinc tailings-based green building materials have High strength, heavy metal curing and radiation protection. Finally, the application and prospects of lead-zinc tailings in the field of building materials are analyzed, which provides a theoretical basis for the researchers in the field. © Published under licence by IOP Publishing Ltd.
语种：
英文
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自动喷水灭火机理的回顾与展望
作者：
赵耀;黄晓家;谢水波;吴懂礼;程超;...
期刊：
给水排水 ,2019年45(6):135-140,144 ISSN：1002-8471
作者机构：
南华大学土木工程学院;[吴懂礼] 中国中元国际工程有限公司;[赵耀; 黄晓家; 程超; 谢水波; 杨世全] 南华大学
关键词：
自动喷水;液滴;传热;蒸发
摘要：
介绍了自动喷水灭火系统的机理,回顾了自动喷水灭火技术的发展,总结了定量表征液滴的方法;介绍了液滴与烟气的相互作用、液滴的蒸发、液滴与火焰的相互作用、热辐射的衰减、水的润湿作用以及喷头的启动时间等自动喷火灭水系统核心技术,提出了自动喷水灭火系统未来的发展方向。
语种：
中文
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流域溢油污染中常见吸油材料吸附效果研究
作者：
孙兰;虢清伟;陈尧;常莎;王劲松;...
期刊：
水处理技术 ,2019年45(9):53-56 ISSN：1000-3770
作者机构：
南华大学土木工程学院,湖南衡阳421001;生态环境部华南环境科学研究所,广东广州510530;[陈思莉; 常莎; 虢清伟; 陈尧] 华南环境科学研究所;[孙兰; 王劲松] 南华大学
关键词：
吸油材料;吸附;石油类污染物;溢油;除油率
摘要：
静态条件下,比较探究了不同温度条件5种常见吸油材料(无纺布、吸油毡、海绵、麻袋、活性炭)对油的质量浓度约为140 mg/L的各石油类污染物的吸附效果。结果表明,各常见吸油材料都能达到瞬时吸附石油类污染物的效果;污水温度对各种吸油材料的吸附效果有较大的影响,温度、石油污染物种类的不同影响效果不同;其中,无纺布的吸油能力最好,吸油量可达254.7 mg/g。在实际流域溢油污染应急过程中,可根据其污染石油的含量,以及污染水源的性质合理选择吸油材料,更大效率的提高应急处置能力。
语种：
中文
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