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X-ray absorption spectroscopy studies for the determination of adsorption binding modes of selenium oxoanions onto iron and manganese based nanomaterials 21

X-ray absorption spectroscopy studies for the determination ...

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21st International Materials Research Congress, IMRC 2012

作者： Gonzalez, Christina M. Parsons, Jason G. Hernandez, Jeffrey Gardea-Torresdey, Jorge L. Department of Chemistry University of Texas at El Paso 500 W University Ave. El PasoTX79968 United States Environmental Science and Engineering PhD program University of Texas at El Paso 500 W University Ave. El PasoTX79968 United States Department of Chemistry University of Texas-Pan American 1201 W University Drive EdinburgTX78534 United States

ISBN: (纸本)9781510804845

Increasing concentrations of selenium oxoanions in the environment are placing many animals at risk for reproduction failure and deformities. The understanding of binding mechanisms of selenium oxoanions to iron and manganese based oxide minerals could lead to enhanced understanding of selenium mobility in the environment. In this study, the binding mechanisms of selenium oxoanions, selenite and selenate, to non microwave-assisted and microwave-assisted synthetic Fe3O4, Mn3O4. and MnFe2O4 nanomaterials were investigated through the use of X-ray absorption spectroscopy. The X-ray absorption near-edge structure (XANES) spectroscopy studies revealed the oxidation state of selenite and selenate remains the same after binding occurs to all nanomaterials in pH 2, 4, or 6 environments. The binding modes of selenite and selenate were determined to be bidentate binuclear through use of Extended x-ray absorption fine structure (EXAFS) and were independent of nanomaterials, synthetic technique, and pH. © 2012 Materials Research Society.

关键词： Magnetite

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Corrigendum to “Unintended consequences of regulating drinking water in rural Canadian communities: Examples from Atlantic Canada” [Health and Place 17(5) (2011) 1030–1037]

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Health & Place 2012年第2期18卷 446-446页

作者： Megan Kot Heather Castleden Graham A. Gagnon Interdisciplinary PhD Program Faculty of Graduate Studies Dalhousie University Halifax Nova Scotia Canada B3J 1Z1 School for Resource and Environmental Studies Faculty of Management Dalhousie University Halifax Nova Scotia Canada B3H 4R2 Civil and Resource Engineering Faculty of Engineering Dalhousie University Halifax Nova Scotia Canada B3J 1Z1

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Sustainability appraisal of used vehicle trade policy options in sub-Saharan African countries

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environmentalist 2009年第4期29卷 360-370页

作者： Kehbila, Anderson Gwanyebit Ertel, Jürgen Brent, Alan Colin Environmental and Resource Management PhD Program Department of Industrial Sustainability Brandenburg University of Technology Cottbus Germany Department of Industrial Sustainability Brandenburg University of Technology Cottbus Germany Chair of Life Cycle Engineering Graduate School of Technology Management University of Pretoria Pretoria South Africa

This paper examines the structure of contemporary vehicle mitigation commitments after lead gasoline phase out in sub-Sahara Africa. First, this paper reviews some of the leading domestic trade policy proposals (emission reduction actions) with regard to their expected technology impacts. Next, it assesses the options based on establishing benchmarks for measuring policy performance in curbing vehicle emissions simultaneously with core sustainable development priorities. Assessing these options identifies the key variables in designing mitigation commitments, offers criteria for evaluating different approaches and discusses the implications of the leading alternatives. This paper argues that a more pronounced dilemma of synergies exists between vehicle emissions reduction and core development concerns as the major players target emissions too narrowly. Finally, this paper sheds more light on strategies that could be employed simultaneously at the regional and domestic levels to enhance sustainable development as trade continues to grow and evolve. © Springer Science+Business Media, LLC 2008.

关键词： Clean air initiative Criteria analysis Sub-Sahara Africa Sustainability appraisal Trade policy Vehicle emissions

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Near-highway pollutants in motor vehicle exhaust: A review of epidemiologic evidence of cardiac and pulmonary health risks

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environmental HEALTH 2007年第1期6卷 23-23页

作者： Brugge, Doug Durant, John L. Rioux, Christine Tufts Community Research Center Tufts University School of Medicine Boston MA USA Department of Civil and Environmental Engineering Tufts University Medford MA 02155 USA Interdisciplinary PhD Program Tufts University Medford MA 02155 USA

There is growing evidence of a distinct set of freshly-emitted air pollutants downwind from major highways, motorways, and freeways that include elevated levels of ultrafine particulates (UFP), black carbon (BC), oxides of nitrogen (NOx), and carbon monoxide (CO). People living or otherwise spending substantial time within about 200 m of highways are exposed to these pollutants more so than persons living at a greater distance, even compared to living on busy urban streets. Evidence of the health hazards of these pollutants arises from studies that assess proximity to highways, actual exposure to the pollutants, or both. Taken as a whole, the health studies show elevated risk for development of asthma and reduced lung function in children who live near major highways. Studies of particulate matter (PM) that show associations with cardiac and pulmonary mortality also appear to indicate increasing risk as smaller geographic areas are studied, suggesting localized sources that likely include major highways. Although less work has tested the association between lung cancer and highways, the existing studies suggest an association as well. While the evidence is substantial for a link between near-highway exposures and adverse health outcomes, considerable work remains to understand the exact nature and magnitude of the risks.

关键词： Black Carbon Forced Vital Capacity Black Smoke Major Highway Truck Traffic

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Arsenic Tolerance in Mesquite (Prosopis sp.):Low Molecular Weight Thiols Synthesis and Glutathione Activity in Response to As(Ⅲ)and(Ⅴ)

Arsenic Tolerance in Mesquite (Prosopis sp.):Low Molecular W...

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第35届国际光谱会议(The Colloquium Spectroscopicum Internationale XXXV)

作者： N.S.Mokgalaka-Matlala E.Flores-Tavizón H.Castillo-Miche J.R.Peralta-Videa J.L.Gardea-Torresdey R.I.Mc Crindle Department of Chemistry University of Texas at El Paso Department of Chemistry University of Texas at El Paso Department of Chemistry University of Texas at El Paso Tshwane University of Technology Department of Chemistry Arcadia Campus Private Bag X680 Pretoria 0001 South Africa Tshwane University of Technology Department of Chemistry Arcadia Campus Private Bag X680 Pretoria 0001 South Africa Environmental Science and Engineering PhD Program 500W University Ave. El Paso TX 79968-0513 USA Tshwane University of Technology Department of Chemistry Arcadia Campus Private Bag X680 Pretoria 0001 South Africa

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Arsenic Tolerance in Mesquite (Prosopis sp.):Low Molecular Weight Thiols Synthesis and Glutathione Activity in Response to As(Ⅲ) and (Ⅴ)

Arsenic Tolerance in Mesquite (Prosopis sp.):Low Molecular W...

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第三十五届国际光谱会议

作者： N.S.Mokgalaka-Matlala E.Flores-Tavizón H.Castillo-Miche J.R.Peralta-Videa J.L.Gardea-Torresdey R.I.Mc Crindle Tshwane University of Technology Department of Chemistry Arcadia Campus Private Bag X680 Pretoria 0001 South Africa Department of Chemistry University of Texas at El Paso Department of Chemistry University of Texas at El Paso Tshwane University of Technology Department of Chemistry Arcadia Campus Private Bag X680 Pretoria 0001 South Africa Department of Chemistry University of Texas at El Paso Environmental Science and Engineering PhD Program 500W University Ave. El Paso TX 79968-0513 USA Department of Chemistry University of Texas at El Paso Department of Chemistry University of Texas at El Paso Tshwane University of Technology Department of Chemistry Arcadia Campus Private Bag X680 Pretoria 0001 South Africa

This study reports the tolerance of arsenic induced-stress by mesquite (Prosopis sp.) *** response of mesquite towards the toxicity effects imposed by As were studied through evaluation of plant growth,nutrients content,synthesis of acid-soluble low molecular weight thiols (LMWTs) and glutathione S-transferase (GST) *** seeds of mesquite were germinated and grown in a hydroponics *** 3 days of growth in a nutrient solution,the plants were transferred to nutrient solution

关键词： Activity Arsenic Tolerance in Mesquite Low Molecular Weight Thiols Synthesis and Glutathione Activity in Response to As Prosopis sp

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Coordinated control and its implementation

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Process Safety Progress 1982年第2期1卷 85-90页

作者： C. S. Lin T. H. Tsai J. W. Lane Tenneco Inc. Houston Texas 77001 Cheng S. Lin:was born in Taiwan and received a BS in Mechanical Engineering at Cheng Kung University. He came to the Rensselaer Polytechnic Institute in 1959 where he received a MME in Mechanical Engineering in 1962 and a PhD in Mechanical Engineering in 1966 He spent three years at West Virginia Pulp and Paper Co. in Process Control Research three years at TRW Inc. Systems Group on the Apollo program and nine years at Bonner and Moore Assoc. installing process control systems worldwide. He joined the Operations Technologies Department of Tenneco Inc. as a Consulting Engineer in June 1980. He is a US citizen and a member of IEEE. Thomas H. Tsai:is a Managing Engineer of the Operations Technologies Department of Tenneco Inc. He is a Registered Professional Engineer in the State of Calif. and is a Member of AIChE and a Senior Member of ISA. He received a BS degree in Chemical Engineering at Tunghan University of Taiwan and attended graduate school at Oklahoma State University. James W. Lane:received a BE and MS in Chemical Engineering from the University of Southern California. He is a Registered Professional Engineer in the States of Tex and Calif. and is a Member of the AIChE Senior Member of the IEEE and Senior Member of the SME. For the last seven years he has been Director of the Operations Technologies Department of Tenneco Inc. a cooperate engineering group providing expertise in advanced control technology for process control energy management and environmental monitoring systems.

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