【摘 要】
：
Hydrodechlorination is a promising technology for the remediation of waterbody contam-inated with trichloroethylene(TCE).In this work,the liquid-phase hydrogenation of TCE by Raney Ni(R-Ni)and Pd/C under an open system have been studied,in which nascent H
【机 构】
：
State Key Laboratory of Water Environment Simulation,School of Environment,Beijing Normal University
论文部分内容阅读
Hydrodechlorination is a promising technology for the remediation of waterbody contam-inated with trichloroethylene(TCE).In this work,the liquid-phase hydrogenation of TCE by Raney Ni(R-Ni)and Pd/C under an open system have been studied,in which nascent H2(Nas-H2)generated in situ from the cathode acted as a hydrogen source.Experimental results showed that TCE was completely eliminate from the solution through the syner-gistic effects of hydrodechlorination and air flotation due to the formation of continuous micro/nano-sized Nas-H2 bubbles from the cathode.Furthermore,the effects of inorganic anions and organic solvents on R-Ni and Pd/C hydrogenation activity were investigated,respectively.The results showed that NO3-and acetonitrile can form a competitive reac-tion with TCE;Sulfur with lone-pair electrons will cause irreversible poisoning to these two catalysts,and have a stronger inhibitory effect on Pd/C.This work helps to realize the sep-aration of volatile halogenated compounds from water environment and provides certain data support for the choice of catalyst in the actual liquid-phase hydrogenation system.
其他文献
2020年上学期新冠肺炎疫情期间,利用现代数据化网络教学形式,通过“浅谈《伤寒论》疫病思想指导下中医护治新冠肺炎”专题教学,尝试将经典《伤寒论》中关于中医药防治外感疫病的学术思想和治疗方法,与课程教学有关章节的教学内容相结合,改变注入式灌输教学和以知识为向导的记忆性学习,开展高等中医院校中医课程“经典引导启发式”教育教学(Classic guidance heuristic education,CGHE)改革的研究.教学效果说明:《伤寒论》“经典引导启发式”教育教学,可以培养中医思辨能力,提高学生的综合素
水肿属中医水气病范畴,是全身气化功能障碍的一种表现.病因复杂多变,西医临床多用利尿剂,其起效快但易复发.中医治法更注重整体,辨证施治.通过查阅近年文献,从病因病机、中医药治疗、中医外治疗法几个方面,概述了近年来对于肾性水肿的临床诊治及研究概况,结果表明辨证论治能提高临床治疗效率;真武汤、五苓散等专方从传统医学和现代药理学的角度均能够有效促进水肿的消退;针灸、敷贴等外治法也能够辅助治疗,提高疗效.结合研究,旨在完善中医药治疗肾性水肿的框架,总结出适用于当代临床治疗肾性水肿的一套治疗方法.
根据脏腑经络理论,试从肝脾胃脏腑及胃经、肝经、小肠经、冲任脉与乳房的关系论治产后缺乳.产后缺乳又称“产后乳汁不足”.乳房的生长、发育、萎缩及乳汁的分泌凭借脏腑经络的濡养与调控,发生生理及病理变化.中医学认为本病一则从脾胃论治产后缺乳,其病机为气血亏虚证,属于乳源不足,需补而下之,主穴膻中、少泽、乳根、足三里穴基础上辨证加血海、膈俞、中脘等穴,达脾胃和、气血盛之目的;再则从肝论治产后缺乳,本型为肝气郁结证,多为乳络郁滞,则需疏而通之,主穴膻中、少泽、乳根、足三里穴,配穴加太冲,进而达到宽胸理气,疏肝解郁,通
课程思政是习总书记在全国高校思想政治工作会议中重点强调的高校教育新模式,要求将专业课程与思政课程结合,形成协同效应.而位于中国传统文化影响深厚的古徽州,将地域性医学世家特色文化融入医学专业课程思政领域,符合现代高校思想政治工作的要求,通过地域性医学世家特色文化和世家流传,以新安王氏为例,从医德、医风、医技上的传承对现今医学思政教育的深层影响,针对医学生、医学专业课教师以及中医药高等院校,注重教育根本,渗透地域性文化特色,丰富完善专业课程思政文化理论体系,发挥地域性医学家族文化在教学中的实效性,传承地域文化
目的 评价3D打印截骨导板辅助胫骨高位截骨术的准确性和安全性.方法 对2020年4月至2020年10月我院行3D打印导板辅助开放楔形行胫骨高位截骨术的22例(36膝)患者进行回顾性研究,其中男11例(16膝),女11例(20膝);平均年龄(41.1±15.8)岁.比较术前计划力线和术后力线的差异及胫骨平台后倾角的变化,统计手术时间、术中透视次数与术中、术后早期并发症情况.结果 22例平均手术时间(40.1±12.8)min,术中平均透视(13.3±4.5)次.胫骨近端内侧角(medial proximal
目的 总结分析双平面开放楔形胫骨高位截骨术(open wedge high tibia osteotomy,OWHTO)术后系统康复疗效,为制订标准化康复方案提供参考.方法 应用双平面OWHTO治疗膝关节内侧骨关节炎患者27例(39膝),其中男12例,女15例;单侧15例,双侧12例.按年龄分为青年组(18～29岁)、中青年组(30～49岁)、中老年组(50～75岁),根据Takeuchi合页骨折分型制订相应康复方案,随访3～6个月.应用疼痛视觉模拟评分(visual ana-logue score,VA
目的 研究胫骨内侧高位截骨术对髌股关节软骨病变的影响.方法 回顾性分析自2014年1月至2018年12月诊断为膝骨关节炎合并髌股关节Iwano分级Ⅰ～Ⅲ级的86例患者,行关节镜及胫骨内侧高位截骨术,比较术后髌股关节的软骨改变.所有患者术前查体均为膝内侧疼痛,无髌股关节疼痛,膝正位X线片示内侧间室骨关节炎,髌骨轴位、侧位X线片可见髌股间隙变窄.术中使用关节镜探查髌股关节时,根据国际软骨修复协会软骨损伤分级(international cartilage repair society,ICRS)将患者分为 A
In this study,three magnetic flocculants with different chelating groups,namely,car-boxymethyl chitosan-modified Fe3O4 flocculant(MC),acrylamide-grafted magnetic car-boxymethyl chitosan flocculant(MCM),and 2-acrylamide-2-methylpropanesulfonic acid copolya
This study investigated a combined low-thermal and CaO2 pretreatment to enhance the volatile fatty acid(VFA)production from waste activated sludge(WAS).The fermentative product was added to a sequencing batch reactor(SBR)as an external carbon source to en
Iron and nitrate(NO3-)are dominant physiologically required nutrients for phytoplankton growth,and iron may also play a key role in the marine nitrogen cycle.In this study,we investigated the temporal and spatial distributions of dissolved iron(DFe)and Fe