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Accelerated anaerobic dechlorination of DDT in slurry with Hydragric Acrisols using citric acid and anthraquinone-2,6-disulfonate(AQDS)

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Journal of Environmental Sciences 2015年第12期27卷 87-94页

作者： cuiying liu Xianghua Xu Jianling Fan Jiangsu Key Laboratory of Agricultural Meteorology College of Applied MeteorologyNanjing University of Information Science and Technology State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of Sciences

The application of electron donor and electron shuttle substances has a vital influence on electron transfer,thus may affect the reductive dechlorination of 1,1,1-trichoro-2,2-bis（p-chlorophenyl）ethane（DDT） in anaerobic reaction *** evaluate the roles of citric acid and anthraquinone-2,6-disulfonate（AQDS） in accelerating the reductive dechlorination of DDT in Hydragric Acrisols that contain abundant iron oxide,a batch anaerobic incubation experiment was conducted in a slurry system with four treatments of（1） control,（2） citric acid,（3） AQDS,and（4） citric acid ＋ *** showed that DDT residues decreased by 78.93%-92.11% of the initial quantities after 20 days of incubation,and 1,1-dichloro-2,2-bis（4-chlorophenyl）-ethane（DDD） was the dominant *** application of citric acid accelerated DDT dechlorination slightly in the first 8 days,while the methanogenesis rate increased quickly,and then the acceleration effect improved after the 8th day while the methanogenesis rate *** amendment by AQDS decreased the Eh value of the reaction system and accelerated microbial reduction of Fe（III） oxides to generate Fe（II）,which was an efficient electron donor,thus enhancing the reductive dechlorination rate of *** addition of citric acid ＋ AQDS was most efficient in stimulating DDT dechlorination,but no significant interaction between citric acid and AQDS on DDT dechlorination was *** results will be of great significance for developing an efficient in situ remediation strategy for DDT-contaminated sites.

关键词： 1,1,1-Trichoro-2,2-bis(p-chlorophenyl)ethane (DDT) Anthraquinone-2,6-disulfonate (AQDS) Electron donor Reductive dechlorination Soil

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Enhanced anaerobic degradation of hexachlorobenzene in a Hydragric Acrisol using humic acid and urea

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Pedosphere 2021年第1期31卷 172-179页

作者： cuiying liu Jianling FAN Xianghua xu Yu Wu Jamgsur Key Labonwory of Agric s/rurad Merorolog Schod of Appled Mee onog.Monjing Universiy of lfrmron Seiene and Technodog.Nonjing 210044China Key Labornaory of Soul Envirowment and Prlwriom Remediaton.Musimte of Sofl Sciemce Chinese Aecademy of ScencexNanjing 20008China Jimgsw Key Laboraory of Amospheric Enviromumenr Monioring and Pollariorn Comirod Jiangsu Collaborarive Iamovarion Cener of Amospherir Envirommenr and Equipmen TechnologySchool of Eavinmmental Sciemce md Engineering.Maning Uniersiny of Inpiormatienn Sciemce and Tecrmelogy.Nanjing 10044China

Humic substances acting as an electron shuttle and nitrogen transformation process influence remarkably the electron transfer in anaerobic reaction systems and thus may affect the reductive dechlorination of hexachlorobenzene(HCB). In order to develop an efficient agricultural strategy for the remediation of organochlorine-contaminated soils, a batch incubation experiment was conducted to study the effects of humic acid, urea, and their interaction on the reductive dechlorination of HCB in a Hydragric Acrisol with high iron oxide content. After 44 d of anaerobic incubation, the five treatments, sterile control,control, humic acid, urea, and humic acid + urea decreased HCB residues by 28.8%, 47.8%, 64.7%, 57.8%, and 71.3%, respectively. The amendment of humic acid or urea significantly decreased soil Eh values and accelerated Fe(Ⅲ) reduction to Fe(Ⅱ), thus promoting markedly reductive dechlorination of HCB. Humic acid had a larger dechlorination effect than urea. Since there was a synergistic interaction between humic acid and urea that accelerated HCB dechlorination, the treatment having both amendments together was the most efficient for HCB dechlorination. The results showed that the combination of NH4^(+)_(-)N supplied by a fertilizer and humic substance is a feasible strategy for the remediation of organochlorine-contaminated soils with abundant iron oxide.

关键词： electron-transfer mediator biological iron reduction persistent organic pollutant polychlorinated organic compound reductive dechlorination soil amendment soil remediation

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Pollutant and Soil Types Influence Effectiveness of Soil-Applied Absorbents in Reducing Rice Plant Uptake of Persistent Organic Pollutants

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Pedosphere 2017年第3期27卷 537-547页

作者： liu cuiying JIANG Xin MA Yuchun Barbara J.CADE-MENUN Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Jiangsu Key Laboratory of Agricultural Meteorology College of Applied Meteorology Nanjing University of Information Science and Technology State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil Science Chinese Academy of Sciences Agriculture and Agri-Food Canada Semiarid Prairie Agricultural Research Centre

Persistent organic pollutants （POPs） in soils are an environmental concern due to their long-term bioavailability, which could be reduced by adding adsorbents. However, testing of these adsorbents is necessary prior to widespread field application. The effects of three adsorbents, nano-organic montmorillonite, nano-organic silicon dioxide （SiOs）, and activated carbon, on hexachlorobenzene （HCB） and pentachlorobenzene （PeCB） accumulation in rice （Oryza sativa L.） plants were tested in a greenhouse experiment using two soils, a Hydragric Acrisol （Ac） and a Gleyi-Stagnic Anthrosol （An）. The bioconcentration factors （BCFs） of HCB and PeCB to rice roots were 2.3-3.7 and 2.0 3.0 times those to rice shoots, respectively. The applications of the three adsorbents decreased HCB and PeCB extractability in Ac, while only the application of activated carbon decreased their extractability in An. The bioavailability of HCB and PeCB to rice plants in Ac was higher than that in An. In Ac, the applications of nano-organic SiOs and activated carbon decreased the BCF of HCB to rice roots by 16.1% and 26.8%, respectively, whereas only the application of activated carbon decreased the BCF of PeCB to rice roots by 31.4%, compared to the control. In An, only the application of activated carbon decreased the BCFs of HCB and PeCB to rice roots by 22.9% and 18.2%, respectively, compared to the control. However, the application of nano-organic montmorillonite inhibited rice growth in both soils. The results of this study suggested that the effectiveness of adsorbents would vary with pollutant and soil types, providing a reference point for developing efficient adsorbents to reduce the ecological risk of POPs.

关键词： accumulation activated carbon bioconcentration factor hexachlorobenzene nano-materials pentachlorobenzene

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Numerical simulation and experimental verification of the restraint intensity of pipeline girth welding joint

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China Welding 2016年第3期25卷 28-35页

作者： Di Xinfie liu cuiying Guo Xiaofiang Xue Zhenkui School of Materials Science and Engineering Tianjin University Tianjin 300072. National Engineering Laboratory of Transportation Safety of Oil&Gas Pipeline Langfang 065000 China Petroleum Pipeline Bureau Langfang 065000.

The restraint intensity （RI） of the pipeline girth welding joint was investigated using finite element method and experimental method to predict the cold cracking susceptibility of pipeline steel. The distribution of RI along the girth weld was investigated to study the influence of welding position on the RL Subsequently, the effects of outer diameter （OD） and wall thickness of pipeline on the RI were studied with ABAQUS software. The results show that the RI is almost independent of welding position. The RI increased with the increasing wall thickness but decreased with the increasing OD. A prediction model of Rl was developed based on the effects of the OD and the wall thickness. It has been found that the predicted RIs were in good agreement with the experimental values. The maximum fractional error between the predicted RI and the experimental values was just about 10%. h was indicated that the errors were mainly caused by the heterogeneous of the weld bead.

关键词： restraint intensity numerical simulation prediction model experimental verification

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Simulation of influence of multi-defects on long-term working performance of high arch dam

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Science China(Technological Sciences) 2011年第S1期54卷 1-8页

作者： ZHANG GuoXin ,liu Yi,ZHENG cuiying & FENG Fan State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,Beijing 100038,China China Institute of Water Resources and Hydropower Research,Beijing 100038,China 1. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin Beijing 100038 China

As an integrated structure,an arch dam is assumed to bear loads in its design ***,multi-defects,such as cracks and the opening of transverse joints,are unavoidable during construction and ***-defects will reduce the structural integrity and stiffness of the dam and affect its working performance and degree of *** the current paper,a numerical model of defects and a simulation method of a high arch dam are *** Chencun arch dam is analyzed as a case *** entire course simulation analysis of the Chencun arch dam from construction to operation is carried out,through which the opening of the transverse and longitudinal joints,formation of cracks,and their influence on deformation and stress of the dam are *** to the results of the analysis,appropriate measures should be adopted to prevent the development of cracks,and observation should be strengthened for a more timely discovery of risks.

关键词： high arch dam crack multi-defects working performance

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高职校德育教师的职业倦怠问题分析

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继续教育研究 2010年第10期 83-85页

作者：刘翠英徐州经贸高等职业学校

教师的职业倦怠是指教师不能应对环境变迁和学校工作新要求时的一种极端反应，是教师伴随教育教学工作中的长期压力体验而出现的生理、情绪和情感的耗竭状态，本文分析高职校德育教师职业倦怠的表现、危害及产生原因，提出解决高职校德... 详细信息

教师的职业倦怠是指教师不能应对环境变迁和学校工作新要求时的一种极端反应，是教师伴随教育教学工作中的长期压力体验而出现的生理、情绪和情感的耗竭状态，本文分析高职校德育教师职业倦怠的表现、危害及产生原因，提出解决高职校德育教师职业倦怠问题的对策与建议：一是加强心理词适，培养健康人格，二是调整期望目标，缓解工作压力，三是健全组织保障，激发工作热情，四是优化环境支持，营造良好氛围。

关键词：高职校德育教师职业倦怠分析

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小分子有机碳对土壤中六氯苯厌氧降解及挥发的影响

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环境科学 2008年第5期29卷 1418-1424页

作者：刘翠英余贵芬蒋新王涛中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室

采用密封培养瓶装置,研究了红壤性水稻土和乌栅土在添加乙酸、葡萄糖、柠檬酸时六氯苯（HCB）的厌氧降解行为,同时分析了土壤pH变化、碳源转化过程中甲烷和二氧化碳的释放及六氯苯的挥发.结果表明,8周内红壤性水稻土中HCB减少了约20%-4... 详细信息

采用密封培养瓶装置,研究了红壤性水稻土和乌栅土在添加乙酸、葡萄糖、柠檬酸时六氯苯（HCB）的厌氧降解行为,同时分析了土壤pH变化、碳源转化过程中甲烷和二氧化碳的释放及六氯苯的挥发.结果表明,8周内红壤性水稻土中HCB减少了约20%-44%,加入乙酸抑制HCB的降解,表明低pH条件不利于脱氯反应,加入葡萄糖和柠檬酸在前期抑制后期则促进HCB的降解;乌栅土中HCB减少了约21%-23%,加入小分子有机质对其降解没有明显的效果;六氯苯降解的主要产物为五氯苯（PCB）,最终检测到红壤性水稻土中PCB为23-96μg/kg,乌栅土中为64-92μg/kg;HCB的降解与CH4和CO2的释放量在统计学上没有显著的相关性;2种土壤中,外加小分子有机碳均减少了HCB的挥发作用,且红壤性水稻土中HCB的挥发比乌栅土中更强,表明土壤有机质是影响HCB挥发的重要因子.

关键词： HCB 厌氧降解还原脱氯 PCB 土壤 CH4 CO2

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ZD 7288,an HCN channel blocker,attenuates chronic visceral pain in rats

ZD 7288,an HCN channel blocker,attenuates chronic visceral p...

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中国生理学会第十届全国青年生理学工作者学术会议

作者：陈瑜 Chun Lin Ying Tang Aiqin Chen cuiying liu Dali Lu 福建医科大学生理学与病理生理学系 Department of Physiology and Pathophysiology Fujian Medical University

＜正＞AIM:To investigate the effects of ZD 7288,a hyperpolarization-activated cyclic nucleotide-gated （HCN）channel blocker,on rats with chronic visceral pain. METHODS:The visceral pain was evaluated by electromyography（EMG）,abdominal withdrawal reflex（AWR）and pain threshold in IBS-like *** addition,ZD 7288 was intrathecally given to attenuate the visceral pain.

关键词： visceral pain abdominal withdrawal reflex spinal cord ZD 7288 hyperpolarization-activated cyclic nucleotide-gated channel

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富水软土长距离非锁口曲线管幕施工风险研究

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地下空间与工程学报 2017年第5期13卷 1381-1388页

作者：李博刘镇周翠英中山大学工学院广州510006 中山大学岩土工程与信息技术研究中心广州510275

非锁口曲线管幕工法是为适应复杂地下环境与工程障碍物而发展的隧道非开挖新技术,其施工过程的风险控制是十分值得重视的研究课题,特别是富水软土隧道。本文结合港珠澳大桥拱北隧道暗挖工程,重点研究富水软土长距离非锁口曲线管幕工程... 详细信息

非锁口曲线管幕工法是为适应复杂地下环境与工程障碍物而发展的隧道非开挖新技术,其施工过程的风险控制是十分值得重视的研究课题,特别是富水软土隧道。本文结合港珠澳大桥拱北隧道暗挖工程,重点研究富水软土长距离非锁口曲线管幕工程施工的风险评估问题。基于富水软土中长距离非锁口曲线管幕施工进行风险分析,得到风险因素对总评指标的权重,再采用专家调查法对单因素进行评价,得到模糊关系矩阵,然后进行合成计算得到综合评判集,建立基于层次分析法的风险模糊评估方法和标准。最后运用该方法对港珠澳大桥拱北隧道管幕工程的施工风险进行分析评估,绘制了风险因素分布直方图,计算得到了综合风险等级,提出了风险控制建议。

关键词：富水软土长距离非锁口曲线管幕风险分析与控制

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活性炭对土壤中多环芳烃生物有效性的影响

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土壤 2022年第5期54卷 1051-1057页

作者：宋丽莹宋洋刘翠英南京信息工程大学应用气象学院南京210044 中国科学院南京土壤研究所南京210008

在某场地采集不同土层土壤,通过室内培养试验,研究添加5%(m/m)活性炭对土壤中PAHs残留的影响,并利用羟丙基-β-环糊精提取方法评价土壤中PAHs生物有效性的动态变化。结果表明:在8个月内,添加活性炭处理土壤中菲、芘的残留量显著高于对... 详细信息

在某场地采集不同土层土壤,通过室内培养试验,研究添加5%(m/m)活性炭对土壤中PAHs残留的影响,并利用羟丙基-β-环糊精提取方法评价土壤中PAHs生物有效性的动态变化。结果表明:在8个月内,添加活性炭处理土壤中菲、芘的残留量显著高于对照处理,苯并[b]荧蒽的残留量显著低于对照处理,苯并[g,h,i]芘残留量在两处理之间无显著差异。在第1个月时,活性炭处理土壤中菲、芘、苯并[b]荧蒽生物有效性较对照处理分别降低了35.06%、37.73%、39.60%,苯并[g,h,i]芘生物有效性仅降低了1.37%;随着时间延长活性炭对土壤中PAHs生物有效性的阻控效果呈减弱趋势。因此,土壤添加5%活性炭能够有效降低PAHs生物有效性,减少其环境风险,并且在添加活性炭1个月内阻控效果最佳。

关键词：土壤活性炭多环芳烃残留量生物有效性

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