检索结果-南通市图书馆

Frontiers of environmental Science & Engineering 2010年第3期4卷 321-328页

作者： Chao QIN shaogui yang cheng {3. Manjun ZHAN Rongjun WANG Huanxing CAI Jia ZHOU state key laboratory of {3. control and resource reuse School of the EnvironmentNanjing UniversityNanjing 210093China Nanjing Research Institude of environmental Protection Nanjing 210013China Changzhou environmental Monitoring Center Changzhou 210093China

A solution of atrazine in a TiO_(2)suspension,an endocrine disruptor in natural water,was tentatively treated by microwave-assisted photocatalytic *** effects of mannitol,oxygen,humic acid,and hydrogen dioxide on the photodegradation rate were *** results could be deduced as follows:the photocatalytic degradation of atrazine fits the pseudo-first-order kinetic well with k=0.03.8 s–1,and·OH was identified as the dominant *** of atrazine was hindered in the presence of humic acid,and the retardation effect increased as the concentration of humic acid increased.H_(2)O_(2)displayed a significant negative influence on atrazine photocatalysis *** on intermediates identified with gas chromatography-mass spectrometry(GC-MS)and Liquid chromatography-mass spectrometry(LC-MS/MS)techniques,the main degradation routes of atrazine are proposed.

关键词： atrazine retardation effect photocatalysis TiO_(2)

Solid Bronsted acidity boosts adsorption reactivity of nano-adsorbent for water decontamination

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Frontiers of environmental Science & Engineering 2024年第7期18卷 23-34页

作者： Sikai cheng Zhixian Li Kaisheng Zhang Qingrui Zhang Xiaolin Zhang Bingcai Pan state key laboratory of {3. control and resource reuse School of the EnvironmentNanjing UniversityNanjing 210023China environmental Materials and pollution control {3. Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031China state key laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China hebei key laboratory of heavy Metal Deep-remediation in Water and resource reused Qinhuangdao 066004China Research Center for environmental Nanotechnology(ReCENT) Nanjing UniversityNanjing 210023China

Despite the development of various Lewis acidic nano-adsorbents for fluoride removal through innersphere coordination,strong competition for hydroxyl ions still hinders efficient water *** addition,the critical issue of polysilicate scaling that results from the ubiquitous silicates must be *** tackle these issues,an alternative approach to enhancing adsorption reactivity by modifying nano-adsorbents with dual Lewis and Bronsted acidity is *** feasibility of this approach is demonstrated by growing zirconium phosphate(ZrP)inside a gel-type anion exchanger,N201,to produce nanocomposite ZrP@N201,in which the confined ZrP contained an otherwise metastable amorphous phase with Lewis acidic Zr^(4+) sites and Bronsted acidic monohydrogen phosphate groups(-O_(3.POH).Compared with the Lewis acidic nano-zirconium oxide analog(HZ0@N201),ZrP@N201 exhibited a greatly improved adsorption capacity(117.9 vs.52.3.mg/g-Zr)and mass transfer rate(3.56×10^(-6) vs.4.55×10^(-7) cm/s),while bulk ZrP produced a thermodynamically stableα-phase with Bronsted acidity that exhibited negligible adsorption capability toward *** enhanced defluoridation activity of ZrP@N201 is attributed to Bronsted acidity and the increased outer electron density of ZA+sites,as corroborated using XPS and solid-state NMR ***,Bronsted acidity strengthens the resistance of ZrP@N201 to silicate,allowing its full regeneration during cyclic *** tests demonstrated 3.10 times the amount of clean water from(waste)for ZrP@N201 as compared to both HZO@N201 and the widely used activated aluminum *** study highlights the potential of developing nano-adsorbents with dual acidities for various environmental remediation applications.

关键词： Nanocomposite Selective adsorption Fluoride removal Dual Lewis and Bronsted acidity Regeneration

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煤矸石资源化利用现状与进展

煤炭科学技术 2024年第1期52卷 380-390页

作者：竹涛武新娟邢成鞠秋歌苏思源中国矿业大学(北京)化学与环境工程学院北京100083 中国天津生态环境科学研究院国家环境保护恶臭污染控制重点实验室天津300191

在实现“碳达峰与碳中和”目标的背景下,煤炭作为国家能源安全的基石,其绿色开发对我国经济建设和社会发展起到了至关重要的作用。然而,在煤矿开采及分选加工过程中,煤矸石作为煤炭主要伴生副产物,已成为我国急需处理的大宗固废之首。然... 详细信息

在实现“碳达峰与碳中和”目标的背景下,煤炭作为国家能源安全的基石,其绿色开发对我国经济建设和社会发展起到了至关重要的作用。然而,在煤矿开采及分选加工过程中,煤矸石作为煤炭主要伴生副产物,已成为我国急需处理的大宗固废之首。然而,目前煤矸石的综合利用率仍处于较低水平,尚未形成较为规范可行的研究体系。因此,针对煤矿开采与煤矸石堆积所造成的水、大气与土壤环境污染问题,通过煤矸石在生产能源、有价金属回收、建筑材料生产与其他方向的资源化利用的相关研究进展,结合煤矸石在防止重金属污染、土壤修复、防止水土流失等方面的应用,最后提出了煤矸石资源化利用未来的发展方向,根据整体进行规划与资源整合,不仅有大量用于常规目的的煤矸石资源化利用方向,同时还有用于生产高附加值产品的特殊用途,通过两者相结合,实现煤矸石的综合化和资源化利用,为其“减量化、资源化、循环化”发展提供借鉴。总之,煤矸石资源化利用是我国煤炭产业转型升级的重要方向,也是实现绿色可持续发展的必由之路。只有通过不懈的努力和持续的创新,才能更好地解决煤矸石堆积问题,推动煤矸石资源化利用向更加高效、环保、可持续的方向发展,为我国经济社会可持续发展做出更大的贡献。

关键词：煤矸石资源化利用高值化利用生态环境土壤复垦

Sorption and cosorption of the nonionic herbicide mefenacet and heavy metals on soil and its components

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Journal of environmental Sciences 2012年第3期24卷 427-434页

作者： Zhenyu Liu Huiqin Guo Huan he cheng {3. state key laboratory of {3. control and resource reuse School of the EnvironmentNanjing UniversityNanjing 210046China Shanghai Pudong New Area environmental Monitoring Station Shanghai 200135China

Sorption and cosorption of the nonionic herbicide mefenacet and two typical metals （copper and silver） on black soil and its components （kaolinite and humic acid） were investigated. It was found that because of their different valences and properties, Cu2＋and Ag＋ presented different effects on the sorption of mefenacet. Due to the competition of Cu2＋, along with the shells of dense water formed by its surface complexation, for sorption surface area with mefenacet, the addition of Cu2＋ decreased the sorption amount of mefenacet on soil and its components, especially on humic acid. However, the addition of Ag＋ significantly enhanced the sorption of mefenacet, which was attributed to the softness of the cation that weakened the hydrophilicity of the local region around Ag＋-complexed functionalities, and thus mitigated the competitive sorption of water. In addition, the sorption of mefenacet on soil with or without the two metals was generally decreased with increasing pH, which was caused by the hydrolysis of carbonyl and carboxyl groups on the surface of the sorbents, π-π interaction between mefenacet and the soil organic matter, and so on. On the other hand, the presence of mefenacet seemed to have little effect on the sorption of Cu2＋ and Ag＋, indicating that Cu2＋ and Ag＋ might be sorbed strongly on the tested sorbents and the mefenacet added was too low in concentration to affect the sorption of the metals.

关键词： mefenacet copper silver soil kaolinite humic acid adsorption pH

氢氧化钾改性玉米秸秆生物炭对水中土霉素的吸附特性及机制

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环境科学 2024年第1期45卷 594-605页

作者：刘总堂孙玉凤费正皓沙新龙温小菊钱彬彬陈建谷成刚盐城师范学院化学与环境工程学院盐城224007 盐城师范学院江苏省农业养殖污染治理与资源化工程研究中心盐城224007 中国科学院南京土壤研究所中国科学院土壤环境与污染修复重点实验室南京210008

四环素类抗生素污染治理是环境研究热点问题之一,生物炭吸附是高效去除有机污染物的重要方法.以玉米秸秆为原料制备热解生物炭(BC),通过氢氧化钾改性获得KBC,选择具有最佳吸附性能的KBC在400~600℃二次热解活化,最终制得改性玉米秸秆生... 详细信息

四环素类抗生素污染治理是环境研究热点问题之一,生物炭吸附是高效去除有机污染物的重要方法.以玉米秸秆为原料制备热解生物炭(BC),通过氢氧化钾改性获得KBC,选择具有最佳吸附性能的KBC在400~600℃二次热解活化,最终制得改性玉米秸秆生物炭AKBC400、AKBC500和AKBC600,并对其结构和表面性质进行表征.通过批处理实验,以BC400为对照,考察了3.AKBC对溶液中盐酸土霉素(OTC)的吸附动力学和吸附热力学特征.与BC400相比,AKBC比表面积增加23.0~3..6倍,孔隙结构显著改善,芳香性增强,吸附性能显著提高.准二级动力学模型可以更好地拟合AKBC对OTC的吸附过程,AKBC500对OTC的吸附速率常数和吸附量均高于AKBC400和AKBC600.颗粒内扩散和膜扩散均是AKBC吸附OTC的控速步骤.Langmuir、Freundlich和Temkin模型均可较好地拟合吸附等温线.AKBC对OTC的吸附均为自发、吸热和熵增加过程,吸附过程同时存在物理吸附和化学吸附作用.AKBC对OTC吸附机制包括孔填充、氢键、π—π共轭、阳离子—π键和强静电作用.AKBC具有良好的孔隙结构和较高的吸附容量,且再生吸附性能稳定,对去除水中土霉素具有较好的潜能.

关键词：玉米秸秆生物炭氢氧化钾改性热解活化盐酸土霉素(OTC) 吸附

Reversibly Tuning Electrochemiluminescence with Stimulated Emission Route for Single-Cell Imaging

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Research 2024年第3期2023卷 205-215页

作者： cheng Ma Xiaodan Gou Zejing Xing Min-Xuan Wang Wenlei Zhu Qin Xu Dechen Jiang jun-Jie Zhu school of Chemistry and Chemical Engineering Yangzhou University.Yangzhou 225002P.R.China state key laboratory of Analytical C{3.mistry for Life Science State Key Laboratory of Pollution Control and Resource ReuseSchool of Chemistry and Chemical EngineeringSchool of the EnvironmentNanjing UniversityNanjing 210023P.R.China.

Electrochemiluminescence (ECL) has established itself as an excellent transduction technique in biosensing and light-emitting device, while conventional ECL mechanism depending on spontaneous emission of luminophores lacks reversibility and tunable emission characters, limiting the universality of ECL technique in the fields of fundamental research and clinical applications. here, we report the first observation of stimulated emission route in ECL and thus establish a reversible tuning ECL microscopy for single-cell imaging. This microscopy uses a focused red-shifted beam to transfer spontaneous ECL into stimulated ECL, which enables selective and reversible tuning of ECL emission from homogeneous solution, single particles, and single cells. After excluding other possible competitive routes, the stimulated ECL emission route is confirmed by a dual-objective system in which the suppressed spontaneous ECL is accompanied by the enhanced stimulated ECL. By incorporating a commercial donut-shaped beam, the sharpness of single-cell matrix adhesion is improved 2 to 3.times compared with the counterpart in confocal ECL mode. The successful establishment of this stimulated emission ECL will greatly advance the development of light-emitting device and super-resolution ECL microscopy.

关键词： tuning beam limiting

室内空气采样及几种重要污染物的监测分析方法探讨

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四川环境 2001年第4期20卷 23-25,29页

作者：程希羌宁季学李同济大学污染控制与资源化研究国家重点实验室上海200092

随着人们对室内空气质量重视程度的提高 ,室内空气监测技术近年来也不断得到发展。采样是监测中最重要的环节 ,采样时间、位置选择的正确与否直接影响测定的成功与否。采样目的是确定采样方案过程中的指导原则 ,一个成功的采样应具备明... 详细信息

随着人们对室内空气质量重视程度的提高 ,室内空气监测技术近年来也不断得到发展。采样是监测中最重要的环节 ,采样时间、位置选择的正确与否直接影响测定的成功与否。采样目的是确定采样方案过程中的指导原则 ,一个成功的采样应具备明确的目的性。氡、气溶胶、VOCs、甲醛是重要的室内污染物 ,其采样和测定技术逐步走向成熟。

关键词：采样氡气溶胶 VOCs 甲醛室内空气污染物空气监测

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中美欧跨区域大气环境监管比较研究及启示

四川环境 2011年第5期30卷 128-132页

作者：刘洁万玉秋沈国成汪晓勇南京大学环境学院污染控制与资源化国家重点实验室南京210046

近年来,酸雨、灰霾和光化学烟雾等跨区域大气环境问题日益突出,严重威胁广大人民群众的健康和环境安全。美国和欧盟在跨区域大气环境监管中都取得了丰富的经验。本文通过对中美欧跨区域大气环境监管在组织机制、法律法规、机构建设和监... 详细信息

近年来,酸雨、灰霾和光化学烟雾等跨区域大气环境问题日益突出,严重威胁广大人民群众的健康和环境安全。美国和欧盟在跨区域大气环境监管中都取得了丰富的经验。本文通过对中美欧跨区域大气环境监管在组织机制、法律法规、机构建设和监管手段等4个方面比较分析,结合我国国情,试图为我国跨区域大气环境监管的完善提供一些有益的启示。

关键词：跨区域大气环境比较研究启示

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我国流域监管中府际关系协调模式研究

四川环境 2011年第4期30卷 128-131页

作者：沈国成万玉秋刘洁史文莱姜汝陶南京大学环境学院污染控制与资源化研究国家重点实验室南京210046

我国流域水资源管理实行流域管理与行政区域管理相结合的管理体制,但目前我国的流域监管体制中中央部委之间的主管与协管的矛盾、中央部委与地方政府之间的统管与分管的矛盾以及地方政府间区域利益的矛盾使得当前我国流域管理效率低下,... 详细信息

我国流域水资源管理实行流域管理与行政区域管理相结合的管理体制,但目前我国的流域监管体制中中央部委之间的主管与协管的矛盾、中央部委与地方政府之间的统管与分管的矛盾以及地方政府间区域利益的矛盾使得当前我国流域管理效率低下,水环境质量不容乐观。在我国目前的府际关系模式下,以上的府际关系矛盾短时间内难以消除,本文认为我国的流域监管体制改革中应着力构建以组织间网络为核心、以科层机制为保障、以市场机制为辅助的复合型协调模式,设立流域协调委员会,从而实现流域的一体化管理。

关键词：流域监管府际关系协调

Recent progress of radionuclides separation by porous materials

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Science china Chemistry 2024年第11期67卷 3515-3577页

作者： Yinghui Xie Long Yu Long Chen cheng Chen Li Wang Fenglei Liu Yun Liao Peng Zhang Tao Chen Yihui Yuan Yuexiang Lu Boyang Huang Hui yang Suhua Wang Shuao Wang Lijian Ma Feng Luo Yunhai Liu Baowei Hu Hongqing Wang Duoqiang Pan Wenkun Zhu Ning Wang Zhe Wang Liang Mao Shengqian Ma Xiangke Wang Guangdong Provincial key laboratory for Green Agricultural Production and Intelligent Equipment School of Environmental Science and Engineering Guangdong University of Petrochemical Technology school of Life Science Shaoxing University College of environmental Science and Engineering North China Electric Power University state key laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions Soochow University College of Chemistry Sichuan University school of Chemistry and Materials Science East China University of Technology school of Chemistry and Chemical Engineering University of South China Frontiers Science Center for Rare Isotopes Lanzhou University state key laboratory of {3.-friendly Energy Materials National Co-innovation Center for Nuclear Waste Disposal and Environmental Safety Sichuan Civil-military Integration Institute School of National Defence & Nuclear Science and TechnologySouthwest University of Science and Technology state key laboratory of Marine {3. Utilization in South china Sea Collaborative Innovation Center of Marine Science and Technology Hainan University Institute of Nuclear and New Energy Technology Tsinghua University state key laboratory of {3. control and resource reuse School of the Environment Nanjing University Department of Chemistry University of North Texas

The separation of radionuclides is critical for the sustainable development of nuclear energy. It is urgent to design and prepare functionalized materials for efficient radionuclides separation. Porous materials are considered excellent candidates for the separation of radionuclides under complex conditions due to their high specific surface areas, tunable pore structures and controllable functionalities. In this review, we summarized the design, preparation and functionalization of porous materials and their application for separation of radionuclides in the past five years, discussed the separation performance and analyzed the structure-activity relationship between various radionuclides and porous materials, and systematically clarified their characterization and mechanism of different type porous materials. We also introduced the detection, irradiation and chemical toxicity of different reflective radionuclides.

关键词： porous materials radionuclides detection separation radiotoxicity interaction mechanism