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711 Aktuelle Fachpublikationen zum Thema temperature

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Iron Atom Exchange between Hematite and Aqueous Fe(II)

26.06.2015 | Andrew J. Frierdich; Maria Helgeson; Chengshuai Liu; Chongmin Wang; Kevin M. Rosso; Michelle M. Scherer, Environmental Science & Technology, 2015

Aqueous Fe(II) has been shown to exchange with structural Fe(III) in goethite without any significant phase transformation. It remains unclear, however, whether aqueous Fe(II) undergoes similar exchange reactions with structural Fe(III) in hematite, a ubiquitous iron oxide mineral. Here, we use ...


Temperature Distribution within a Cold Cap during Nuclear Waste Vitrification

25.06.2015 | Derek R. Dixon; Michael J. Schweiger; Brian J. Riley; Richard Pokorny; Pavel Hrma, Environmental Science & Technology, 2015

The kinetics of the feed-to-glass conversion affects the waste vitrification rate in an electric glass melter. The primary area of interest in this conversion process is the cold cap, a layer of reacting feed on top of the molten glass. The work presented here provides an experimental ...


Synthesis optimization and fluoride uptake properties of high capacity composite adsorbent for defluoridation of drinking water

24.06.2015 | Dilip Thakre, Priyadarshini Dixit, Sanghratna Waghmare, Nilesh Manwar, Nitin Labhsetwar, Sadhana S. Rayalu, Environmental Progress, 2015

A novel low cost composite adsorbent has been successfully synthesized from waste eggshell (ES), alum, and chitin for removal of excess fluoride from drinking water. Synthesis of chitin based adsorbent (CBA) was optimized by varying different synthesis parameters such as alumina loading, ...


Source Apportionment of Polycyclic Aromatic Hydrocarbons in Central European Soils with Compound-Specific Triple Isotopes (δ13C, Δ14C, and δ2H)

23.06.2015 | Carme Bosch; August Andersson; Martin Kruså; Cecilia Bandh; Ivana Hovorková; Jana Klánová; Timothy D. J. Knowles; Ri ..., Environmental Science & Technology, 2015

This paper reports the first study applying a triple-isotope approach for source apportionment of polycyclic aromatic hydrocarbons (PAHs). The 13C/12C, 14C/12C, and 2H/1H isotope ratios of PAHs were determined in forest soils from mountainous areas of the Czech Republic, European Union. ...


Electrochemical method for wet removal of phosphine

22.06.2015 | Guangfei Qu, Jian Zhang, Yilu Lin, Junyan Li, Ping Ning, Yongtao Yu, Environmental Progress, 2015

The removal of phosphine (PH3) was studied with an electrochemical approach using a Ti/SnO2 anode. The effects of the current density, O2 content, gas flow rate, temperature, and type of electrolyte on the PH3 removal were investigated. The liquid phase reaction products were detected by ion ...


Integrating anaerobic digestion and hydrothermal liquefaction for renewable energy production: An experimental investigation

22.06.2015 | Blessing E. Eboibi, David M. Lewis, Peter J. Ashman, Senthil Chinnasamy, Environmental Progress, 2015

The combination of anaerobic digestion and hydrothermal liquefaction can provide enhanced energy production from animal wastes such as cow manure. Hydrothermal liquefaction (HTL) of anaerobic digestate is a novel approach for waste management to recover residual carbon Anaerobic digestion of cow ...


Removal of phenol and cyanide in multi‐substrate system using copper impregnated activated carbon (Cu‐GAC)

22.06.2015 | Bhumica Agarwal, Chandrajit Balomajumder, Environmental Progress, 2015

This study studies the process of removal of phenol and cyanide in multi‐substrate system using copper impregnated Granular Activated Carbon (Cu‐GAC). Effects of various process parameters on removal were taken into consideration. It was observed that under optimum conditions of pH 9, ...


Thermal Stability of Ettringite Exposed to Atmosphere: Implications for the Uptake of Harmful Ions by Cement

22.06.2015 | Amalia Jiménez; Manuel Prieto, Environmental Science & Technology, 2015

The decomposition behavior of ettringite, Ca6Al2(SO4)3(OH)12·26H2O, at different temperatures was studied by means of isothermal XRD experiments, in which the evolution of the solid is monitored as a function of time. The experiments were performed at 40, 50, 55, and 60 °C for a natural ...


Sustainability, Vol. 7, Pages 7942-7958: Optimum Fisheries Management under Climate Variability: Evidence from Artisanal Marine Fishing in Ghana

19.06.2015 | Akpalu, Wisdom ; Dasmani, Isaac ; Normanyo, Ametefee K., Sustainability, 2015

In most developing coastal countries, the artisanal fisheries sector is managed as a common pool resource. As a result, such fisheries are overcapitalized and overfished. In Ghana, in addition to anthropogenic factors, there is evidence of rising coastal temperature and its variance, which could ...


Chromium Reaction Mechanisms for Speciation using Synchrotron in-Situ High-Temperature X-ray Diffraction

19.06.2015 | Fiona Low; Justin Kimpton; Siobhan A. Wilson; Lian Zhang, Environmental Science & Technology, 2015

We use in situ high-temperature X-ray diffraction (HT-XRD), ex-situ XRD and synchrotron X-ray absorption near edge structure spectroscopy (XANES) to derive fundamental insights into mechanisms of chromium oxidation during combustion of solid fuels. To mimic the real combustion environment, ...


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