工程教育认证背景下OBE教育理念的借鉴与思考
作者：
谭文发;周英;吕俊文;房琦;吴晓燕
期刊：
教育现代化 ,2019年(07):28-30 ISSN：2095-8420
作者机构：
1. 南华大学资源环境与安全工程学院;2. 南华大学船山学院
关键词：
工程教育认证;环境工程;人才培养
摘要：
环境工程专业的教育强调知识的应用性,注重培养学生分析问题、解决问题的能力。为促进工程教育的国际互认,环境工程专业工程教育认证势在必行。南华大学环境专业是在原核工业第六研究所通风辐射防护室等基础上发展而来的,特色鲜明。近年,南华大学环境工程专业基于 OBE（Outcome based education）教育模式,紧紧围绕学校"一基三实"中强调的"把人才培养做实","把服务社会做实"的学校发展思路,在培养目标分解、理论课程体系和实践教学改革、学生创新能力培养、评估体系完善和高素质教师队伍建设等方面进行了一系列的改革与尝试,取得了良好效果。
语种：
中文
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Understanding the solid phase chemical fractionation of uranium in soil profile near a hydrometallurgical factory
作者：
Yang, Sheng;Zhang, Xiaowen* ;Wu, Xiaoyan;Li, Mi;Zhang, Lijiang;...
期刊：
Chemosphere ,2019年236(Dec.):124392 ISSN：0045-6535
通讯作者：
Zhang, Xiaowen
作者机构：
[Li, Mi; Yang, Sheng; Peng, Ying; Zhang, Lijiang; Huang, Qianwen; Zhang, Xiaowen; Tan, Wenfa; Wu, Xiaoyan] Univ South China, Sch Resource & Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Li, Mi; Zhang, Xiaowen; Tan, Wenfa; Wu, Xiaoyan] Univ South China, Key Lab Radioact Waste Treatment & Disposal, Hengyang 421001, Peoples R China.
通讯机构：
[Zhang, Xiaowen] U;Univ South China, Sch Resource & Environm & Safety Engn, Hengyang 421001, Peoples R China.
关键词：
Adsorption-migration;Sequential extraction;Soil profile;Spatial distribution;U
摘要：
Uranium (U) contamination of soil has become a major concern with respect to its toxicity, accumulation in the food chain, and persistence in the environment. Anthropogenic activities like mining and processing of U ores has become pressing issues throughout the world. The aim of the work is to understand the chemical fractionation of U in polluted soil and the mechanism involved. U-free soils samples of eluvial (E), illuvial (B), and parent-material (C) horizons from a hydrometallurgical factory area were used. The experimental results showed that the U adsorption capacity decreased with depth, and its mobility in the upper soil is better than the lower. It was closely related to distribution coefficient (Kd), pH, organic-matter (OM), and carbonate content of soil horizons. The chemical fractionation of U was studied using the BCR sequential extraction scheme for soils after saturated adsorption. It was noted that the U reducible and oxidizable fraction in the E and B horizons can vertically transfer to the C horizon and occurs a significant rearrangement of U in different horizons. BET, SEM, XRD, and FT-IR analyses showed that different U distribution and migration in soil profile is mainly affected by specific surface area, soil particle size, mineral composition, and active groups. The XPS data further indicated that U (VI) is gradually converted to U (IV) with decreased depth and fixed in deeper soil becoming insoluble and immobile. It is the first step to investigate potential migration and plan U mining and milling area long-term management. © 2019
语种：
英文
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《现代检测技术》课程教学新探索
作者：
吴晓燕;谭维;邓钦文;李密;房琦;...
期刊：
广东化工 ,2019年46(5):242,247 ISSN：1007-1865
作者机构：
南华大学 资源环境与安全工程学院,湖南衡阳,421001;南华大学 研究生院,湖南衡阳,421001;[张德; 李密; 邓钦文; 吴晓燕; 房琦; 谭维; 谭文发] 南华大学
关键词：
检测技术;环境工程;硕士研究生
摘要：
《现代检测技术》逐渐成为环境工程专业硕士研究生的重要专业课程,主要包括样品的预处理、仪器检测技术和结果表达分析等方面内容。针对研究生的培养目标,利用现代化的检测手段来检测环境问题中所涉及的相关重要指标,通过各类指标来分析与解决重大环境问题。结合现阶段研究生培养过程中存在的问题与不足,以及学校的特色,本文从教学内容、教学方式与考核方式三个方面来开展该门课程的教学新探索,以期为类似的教学提供一定的参考作用。
语种：
中文
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以MnFe_2O_4为阻挡层的Ni - YSZ 阳极支撑SOFC 的效能
作者：
吴晓燕;谭维;罗才武;张晓文;李密;...
期刊：
材料导报 ,2019年33(12):1949-1954 ISSN：1005-023X
作者机构：
南华大学资源环境与安全工程学院,衡阳,421001;南华大学研究生院,衡阳,421001;[罗才武; 张晓文; 李密; 吴晓燕; 房琦; 谭维; 谭文发] 南华大学
关键词：
固体氧化物燃料电池;阳极;阻挡层;铁酸锰;生物质气;积碳
摘要：
为提高镍-氧化钇稳定氧化锆(Ni-YSZ)阳极支撑的固体氧化物燃料电池(SOFC)以含碳气为燃料时的抗积碳性能,采用丝网印刷法在Ni-YSZ阳极表面印制阻挡层,阻挡层的材料为高温煅烧制备的铁酸锰(MnFe_2O_4)粉体。在750 ℃下以模拟污泥微波热解生物质气为燃料,测试含阻挡层的电池的电化学效能和抗积碳性能,并利用扫描电镜对测试前、后的阳极进行表征。研究结果表明:MnFe_2O_4阻挡层与Ni-YSZ 阳极的结合性较好;在Ni-YSZ 阳极上添加MnFe_2O_4阻挡层后,电池的放电性能有所降低,但是电池在以模拟生物质气为燃料时的抗积碳性能大幅提高,且在浆料中添加16%(质量分数)的石墨制备的阻挡层效果最佳。本研究对Ni-YSZ 阳极以生物质气为燃料时的抗积碳能力的改进与发展具有积极意义。
语种：
中文
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地方高校大学生环保意识与行为的对比研究——以南华大学环境工程专业为例
作者：
吴晓燕;谭维;李密;房琦;谭文发;...
期刊：
教育现代化 ,2019年(66):248-250 ISSN：2095-8420
作者机构：
1. 南华大学资源环境与安全工程学院;2. 南华大学研究生院
关键词：
环境工程;环保意识;环保行为
摘要：
本文的研究目的是开展环境工程专业与非环境工程专业学生在大学期间的环保意识与行为的对比研究。通过乐调查发布调查问卷的形式,调查研究了某高校环境工程专业大一至大四的全部学生,其中安全工程专业部分班级作为对照组。依据网站统计调查量表中的相关结果,被调研的所有大学生均有较高的环保意识,但环保行为较差。专业教育可较大提高学生的环保专业知识能力,但是对环保意识与环保行为的影响较小。高校需加强环保行为的活动开展和引导,以满足社会对大学生在环保各方面的期望。
语种：
中文
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Uranium Extraction from Tailings by Dilute Alkali Pretreatment-Sulfuric Acid Leaching Technology
作者：
Huang, Chunmei;Li, Mi* ;Zhang, Xiaowen;Gao, Fangying;Wu, Xiaoyan;...
期刊：
JOM ,2018年70(11):2746-2752 ISSN：1047-4838
通讯作者：
Li, Mi
作者机构：
[Li, Mi; Gao, Fangying; Fang, Qi; Huang, Chunmei; Zhang, Xiaowen; Tan, Wenfa; Wu, Xiaoyan; Zhang, De] Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Li, Mi; Fang, Qi; Zhang, Xiaowen; Tan, Wenfa; Wu, Xiaoyan; Zhang, De] Univ South China, Key Lab Radioact Waste Treatment & Disposal, Hengyang 421001, Peoples R China.
通讯机构：
[Li, Mi] U;Univ South China, Sch Resource Environm & Safety Engn, Hengyang 421001, Peoples R China.;Univ South China, Key Lab Radioact Waste Treatment & Disposal, Hengyang 421001, Peoples R China.
摘要：
Preliminary extraction research was carried out to develop a suitable dilute alkali pretreatment–sulfuric acid leaching process for uranium recovery from tailings containing 80 ppm uranium. The effects of alkali concentration, liquid-to-solid ratio, stirring speed and leaching time on uranium content in the leaching residues were investigated. The results showed that the leaching efficiency of dilute alkali pretreatment–sulfuric acid leaching is superior to direct acid leaching. Only 13 ppm and 7.5 ppm of uranium remained in tailings by using NaOH and Na 2 CO 3 , respectively, with an alkali concentration of 10 g/L, a liquid-to-solid ratio of 20, and an agitation of 400 rpm for 2 h. In addition, uranium liberation was significantly promoted by forming pores during the leaching process. This technology has advantages of low energy consumption, high leaching efficiency and less impurity production compared to traditional direct acid leaching. © 2018, The Minerals, Metals & Materials Society.
语种：
英文
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Extraction mechanism of depleted uranium exposure by dilute alkali pretreatment combined with acid leaching
作者：
Li, Mi* ;Huang, Chun-Mei;Zhang, Xiao-Wen;Gao, Fang-Ying;Wu, Xiao-Yan;...
期刊：
Hydrometallurgy ,2018年180:201-209 ISSN：0304-386X
通讯作者：
Li, Mi
作者机构：
[Gao, Fang-Ying; Li, Mi; Huang, Chun-Mei; Fang, Qi; Zhang, Xiao-Wen; Tan, Wen-Fa; Wu, Xiao-Yan; Zhang, De] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Li, Mi; Zhang, Xiao-Wen; Wu, Xiao-Yan] Univ South China, Key Lab Radioact Waste Treatment & Disposal, Hengyang 421001, Peoples R China.
通讯机构：
[Li, Mi] U;Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.
关键词：
Uranium;Tailings;Leaching;Gangue
摘要：
Uranium recovery from tailings is difficult because of the encapsulation of uranium by high content of gangue minerals. Uranium separation from gangue minerals has also been a key point in improving uranium extraction in the field of low-grade uranium resource recovery. This study proposed a high-efficiency alkali-pretreatment followed by acid leaching (two-step leaching) process for improving uranium extraction from uranium tailings. The main principle was to use a low concentration of alkaline solution to selectively comminute gangue minerals and to promote the formation of micropores in particles, providing a "path" for sulfuric acid to enter the interior of the uranium minerals. The effects of process parameters on uranium extraction and the changes in elemental composition, phase composition, morphology, and aperture of the tailings were investigated to show the mechanism of gangue comminution. Results showed that the uranium extraction percent without alkali pretreatment was only 63.91%, while it increased to 90.80% for the two-step leaching process under the same conditions. The low concentration of alkaline solution can selectively decompose gangue minerals, and dilute acid can then further reduce the degree of crystallinity of the silicates. Thus, a large number of mesopores in the tailings formed to improve the exposure ratio of uranium to the leaching agent. This new discovery may aid in the recovery of valuable metals from low-grade ore or tailings with high gangue content.
语种：
英文
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Numerical simulation to quantify the leakage risk in a multi-layer aquifer system of pure brine recovery and CO2 -enhanced brine recovery: a case study of potassium-rich brine recovery in Jianghan Basin of China
作者：
Fang, Qi;Lv, Junwen;Peng, Guojian* ;Luo, Caiwu;Li, Mi;...
期刊：
Environmental Earth Sciences ,2017年76(13):1-11 ISSN：1866-6280
通讯作者：
Peng, Guojian
作者机构：
[Li, Mi; Fang, Qi; Lv, Junwen; Tan, Wenfa; Luo, Caiwu; Luo, Yingfeng] Univ South China, Sch Environm & Safety Engn, Hengyang 421001, Peoples R China.;[Peng, Guojian] Univ South China, Sch Comp Sci & Technol, Hengyang 421001, Peoples R China.
通讯机构：
[Peng, Guojian] U;Univ South China, Sch Comp Sci & Technol, Hengyang 421001, Peoples R China.
关键词：
Pure brine recovery (PBR);CO2-enhanced brine recovery (CO2-EBR);A multi-layer aquifer;Leakage risk;Pressure control
摘要：
Deep brine recovery enhanced by supercritical CO2 injection is proposed to be a win–win method for the enhancement of brine production and CO2 storage capacity and security. However, the cross-flow through interlayers under different permeability conditions is not well investigated for a multi-layer aquifer system. In this work, a multi-layer aquifer system with different permeability conditions was built up to quantify the brine production yield and the leakage risk under both schemes of pure brine recovery and enhanced by supercritical CO2. Numerical simulation results show that the permeability conditions of the interlayers have a significant effect on the brine production and the leakage risk as well as the regional pressure. Brine recovery enhanced by supercritical CO2 injection can improve the brine production yield by a factor of 2–3.5 compared to the pure brine recovery. For the pure brine recovery, strong cross-flow through interlayers occurs due to the drastic and extensive pressure drop, even for the relative low permeability (k=10−20m2) mudstone interlayers. Brine recovery enhanced by supercritical CO2 can successfully manage the regional pressure and decrease the leakage risk, even for the relative high permeability (k=10−17m2) mudstone interlayers. In addition, since the leakage of brine mainly occurs in the early stage of brine production, it is possible to minimize the leakage risk by gradually decreasing the brine production pressure at the early stage. Since the leakage of CO2 occurs in the whole production period and is significantly influenced by the buoyancy force, it may be more effective by adopting horizontal wells and optimizing well placement to reduce the CO2 leakage risk. © 2017, Springer-Verlag GmbH Germany.
语种：
英文
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Optimization of demulsification-coagulation-adsorption parameters for the treatment of wastewater with fluorescent permeating agent from a Chinese machinery plant
作者：
Zhang, Xiaowen* ;Wang, Beibei* ;Wu, Xiao Yan;Li, Mi;Tan, Wenfa
期刊：
Desalination and Water Treatment ,2017年100:46-54 ISSN：1944-3994
通讯作者：
Zhang, Xiaowen;Wang, Beibei
作者机构：
[Li, Mi; Zhang, Xiaowen; Tan, Wenfa; Wu, Xiao Yan; Wang, Beibei] Univ South China, Sch Environm & Safety Engn, Hengyang, Hunan, Peoples R China.
通讯机构：
[Zhang, XW; Wang, BB] U;Univ South China, Sch Environm & Safety Engn, Hengyang, Hunan, Peoples R China.
关键词：
Demulsification-coagulation-adsorbtion;Emulsifying wastewater;Fluorescent penetrant
摘要：
Fluorescent penetrant is used for the cleaning process of precision machine parts in non-destruc-tive testing (NDT). Wastewater will be produced in that course with high chemical oxygen demand (COD) (1000–15,000 mg/L), high mineral oil (300–3000 mg/L) and high chroma (600–2000). This liquid waste has a serious influence on the environment due to its’ stronger biological toxicity and higher virulence. When the oil content exceeds 0.01 mg/L in water, the water will lack oxygen and lead aquatic plants and animals to die, thus create badly water pollution. How to treat this polluted water is a difficult task in sewage treatment. The demulsification-coagulation-adsorption process was adapted for conducting this emulsifying wastewater. This research has compared the demulsification effects between the nonionic surfactant demulsifier of AR and the electrolyte demulsifier of CaCl2 and MgCl2 as well as the coagulation performance between the polymeric aluminum chloride (PAC) and the polyaluminium chloride sulfate (PACS). Effects of the types of demulsifier and coagulant, dosage, pH, static duration, absorbing time and other process parameters have been investigated. Based on this, the process parameters have been optimized. The results shown that the best treatment condition was using AR as demulsifier, PACS as flocculant, and vermiculite as adsorbent, which resulted in higher quality and efficiency in removal of 97.87% COD, 99.62% oil and 99.22% colority. This could meet the first grade standard of the national integrated wastewater discharge standard (GB8978-1996). Thus, the integration method of demulsification-coagulation-adsorbtion is a practicable way to solve this kind of sewage. © 2017 Desalination Publications. All rights reserved.
语种：
英文
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Application of a combination of municipal solid waste incineration fly ash and lightweight aggregate in concrete
作者：
Tan, Wen-fa* ;Lv, Jun-wen;Deng, Qin-wen;Zhang, Xiao-wen
期刊：
Journal of Adhesion Science and Technology ,2016年30(8):866-877 ISSN：0169-4243
通讯作者：
Tan, Wen-fa
作者机构：
[Tan, Wen-fa; Zhang, Xiao-wen; Lv, Jun-wen; Deng, Qin-wen] Univ South China, Dept Environm Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Tan, Wen-fa] U;Univ South China, Dept Environm Engn, Hengyang 421001, Peoples R China.
关键词：
Fly ash;hazardous waste;lightweight aggregate;concrete
摘要：
This paper highlights significant findings from focusing on developing a sustainable lightweight aggregate (LWA) concrete, which replaced Portland cement partially with municipal solid waste incineration fly ash (MSWI FA) and all of the conventional coarse aggregate with LWA sintered by MSWI FA, shale, and sludge. A series of four experiments, differing in dosage of MSWI FA and aggregate, were conducted for this project. The results of this study generally showed that appropriate amount of MSWI FA substitution for cement has no significantly lowered the compressive strengths of LWA concrete, while it can lower the oven-dry density and the thermal conductivity. The optimum performance of LWA concrete (after 28 days of curing) is as follows: (1) slump flow of 700 mm, (2) compressive strength of 30.14 MPa, (3) dry apparent density of 1.66 g/cm3, (4) thermal conductivity of 0.73 W (m K)−1; the mixture ratio of LWA, fly ash, cement, and fine sand is 3.0: 0.1: 0.9: 2.0 based on dry weight. Meanwhile, the results of leaching test are much lower than the concentration limits of hazardous constituents of hazardous waste identification standard (GB/T 5083.3-2007) and landfill standard (GB16889-2008).
语种：
英文
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Environmental effects of coal gangue and its utilization
作者：
Tan, W-F.;Wang, L-A.* ;Huang, C.
期刊：
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS ,2016年38(24):3716-3721 ISSN：1556-7036
通讯作者：
Wang, L-A.
作者机构：
[Tan, W-F.] Univ South China, Dept Environm Engn, Hengyang, Peoples R China.;[Huang, C.; Tan, W-F.; Wang, L-A.] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing, Peoples R China.;[Wang, L-A.] Chongqing Univ, Sch Resources & Environm Sci, 174 Shazhengjie, Chongqing 400044, Peoples R China.
通讯机构：
[Wang, L-A.] C;Chongqing Univ, Sch Resources & Environm Sci, 174 Shazhengjie, Chongqing 400044, Peoples R China.
关键词：
Coal gangue;environmental effects;utilization;lightweight aggregates;natural resources
摘要：
Coal gangue has accumulated huge coal gangue piles, occupying lots of land as well as having striking influence on the neighboring environmental effects. This paper seeks a new way of coal gangue treatment in which the coal gangue blended with shale and sludge was sintered in rotary kiln to form lightweight aggregates. The results show that the optimum mixture ratio of coal gangue, shale, and sludge is 50, 40, and 10 wt% and the corresponding indicators of aggregates obtained are: (a) bulk density of 658 kg/m<sup>3</sup>, (b) granule strength of 643N, (c) 1 h absorption water to be 13.8%. ©2016 Taylor & Francis.
语种：
英文
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生物技术处理含铀废水的研究进展
作者：
谭文发;吕俊文;唐东山
期刊：
生物技术通报 ,2015年31(3):82-87 ISSN：1002-5464
作者机构：
[谭文发; 吕俊文; 唐东山] 南华大学环境工程系;南华大学放射性三废处理与处置重点实验室
关键词：
含铀废水;微生物;转化;机理
摘要：
随着核能的大力推广与应用,放射性含铀废水的种类和数量越来越多,为防止水体中放射性核素迁移扩散,含铀放射性废水的有效处理成为一项亟待解决的问题。目前研究前沿的生物处理方法具有高效、价廉的优势,对于含铀废水的治理前景乐观。综述了近几年生物法处理含铀废水的进展,评述了生物法处理含铀废水的主要原理及其优缺点,并提出生物技术处理含铀废水的进一步研究方向。
语种：
中文
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Co-combustion Kinetics Parameters of MSWI Fly Ash with Sawdust and Shale under Different Heating Rates and Atmospheres
作者：
Tan, W. -F.;Wang, L. -A.* ;Huang, C.;Li, J. -X.;Yang, W.
期刊：
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS ,2015年37(22):2415-2421 ISSN：1556-7036
通讯作者：
Wang, L. -A.
作者机构：
[Tan, W. -F.] Univ South China, Dept Environm Engn, Hengyang, Peoples R China.;[Li, J. -X.; Wang, L. -A.; Huang, C.; Yang, W.] Chongqing Univ, State Key Lab Coal Mine Disaster Dynam & Control, Chongqing 400044, Peoples R China.;[Wang, L. -A.] Chongqing Univ, Sch Resources & Environm Sci, 174 Shazhengjie, Chongqing 400044, Peoples R China.
通讯机构：
[Wang, L. -A.] C;Chongqing Univ, Sch Resources & Environm Sci, 174 Shazhengjie, Chongqing 400044, Peoples R China.
关键词：
co-combustion;lightweight aggregates;municipal solid waste incineration fly ash;sawdust;shale;thermogravimetry-differential thermogravimetry-differential scanning calorimetry analysis
摘要：
The kinetic parameters for the co-combustion of municipal solid waste incineration fly ash, sawdust, and shale have been determined by a sync analyzer, aiming to simulate the manufacture of lightweight aggregates process. Experiments were carried out with about each 10-mg samples at different heating rates in air and argon atmospheres, respectively. The results indicate that behaviors of the mixture can be broadly divided into four separate events. The total mass loss reached the maximum at 20 K·min<sup>-1</sup>. There appears to be no unanimous formula of the degree of the total mass loss in different gas atmospheres. ©Copyright ©Taylor & Francis Group, LLC.
语种：
英文
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