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Geochemical Processes Constraining Iron Uptake in Strategy II Fe Acquisition

14-10-2014 | W. D. C. Schenkeveld; Y. Schindlegger; E. Oburger; M. Puschenreiter; S. Hann; S. M. Kraemer, Environmental Science & Technology, 2014

Phytosiderophores (PS) are natural chelating agents, exuded by graminaceous plants (grasses) for the purpose of Fe acquisition (Strategy II). They can form soluble Fe complexes with soil-Fe that can be readily taken up. PS are exuded in a diurnal pulse release, and with the start of PS release a ...


Release of Nitrous Acid and Nitrogen Dioxide from Nitrate Photolysis in Acidic Aqueous Solutions

10-10-2014 | Nicole K. Scharko; Andrew E. Berke; Jonathan D. Raff, Environmental Science & Technology, 2014

Nitrate (NO3¯) is an abundant component of aerosols, boundary layer surface films, and surface water. Photolysis of NO3¯ leads to NO2 and HONO, both of which play important roles in tropospheric ozone and OH production. Field and laboratory studies suggest that NO3¯ photochemistry is a more ...


Preparation, Characterization and Origin of Highly Active and Thermally Stable Pd–Ce0.8Zr0.2O2 Catalysts via Sol-Evaporation Induced Self-Assembly Method

06-10-2014 | Jian Liu; Bing Liu; Yu Fang; Zhen Zhao; Yuechang Wei; Xue-Qing Gong; Chunming Xu; Aijun Duan; Guiyuan Jiang, Environmental Science & Technology, 2014

The Pd–Ce–Zr solid solution catalysts were in situ synthesized by a sol-evaporation induced self-assembly (SEISA) method. The catalytic performances of the as-prepared catalysts for CO oxidation and their physicochemical properties were investigated with various characterization techniques. The ...


Removal of Elemental Mercury from Flue Gas by Thermally Activated Ammonium Persulfate in A Bubble Column Reactor

03-10-2014 | Yangxian Liu; Qian Wang, Environmental Science & Technology, 2014

In this article, a novel technique on removal of elemental mercury (Hg0) from flue gas by thermally activated ammonium persulfate ((NH4)2S2O8) has been developed for the first time. Some experiments were carried out in a bubble column reactor to evaluate the effects of process parameters on Hg0 ...


Different Arsenate and Phosphate Incorporation Effects on the Nucleation and Growth of Iron(III) (Hydr)oxides on Quartz

03-10-2014 | Chelsea W. Neil; Byeongdu Lee; Young-Shin Jun, Environmental Science & Technology, 2014

Iron(III) (hydr)oxides play an important role in the geochemical cycling of contaminants in natural and engineered aquatic systems. The ability of iron(III) (hydr)oxides to immobilize contaminants can be related to whether the precipitates form heterogeneously (e.g., at mineral surfaces) or ...


Oxidation of Microcystin-LR by Ferrate(VI): Kinetics, Degradation Pathways, and Toxicity Assessments

02-10-2014 | Wenjun Jiang; Long Chen; Sudha Rani Batchu; Piero R. Gardinali; Libor Jasa; Blahoslav Marsalek; Radek Zboril; Dionys ..., Environmental Science & Technology, 2014

The presence of the potent cyanotoxin, microcystin-LR (MC-LR), in drinking water sources poses a serious risk to public health. The kinetics of the reactivity of ferrate(VI) (FeVIO42–, Fe(VI)) with MC-LR and model compounds (sorbic acid, sorbic alcohol, and glycine anhydride) are reported over a ...


Mechanism of the Selective Catalytic Oxidation of Slip Ammonia over Ru-Modified Ce–Zr Complexes Determined by in Situ Diffuse Reflectance Infrared Fourier Transform Spectroscopy

02-10-2014 | Wanmiao Chen; Yongpeng Ma; Zan Qu; Qinghang Liu; Wenjun Huang; Xiaofang Hu; Naiqiang Yan, Environmental Science & Technology, 2014

The slip ammonia from selective catalytic reduction (SCR) of NOx in coal-fired flue gas can result in deterioration of the utilities or even the environmental issues. To achieve selective catalytic oxidation (SCO) of slip ammonia, Ru-modified Ce–Zr solid solution catalysts were prepared and ...


Binary Short-Range Colloidal Assembly of Magnetic Iron Oxides Nanoparticles and Fullerene (nC60) in Environmental Media

02-10-2014 | Saikat Ghosh; Nihar R. Pradhan; Hamid Mashayekhi; Stefan Dickert; Rukshan Thantirige; Mark T. Tuominen; Shu Tao; Bao ..., Environmental Science & Technology, 2014

Colloidal assembly of nC60 fullerene with naturally abundant magnetic iron oxide NPs will affect their fate and transformation in environmental media. In solution, fullerene association to aggregating iron oxide NPs/clusters greatly enhanced the overall colloidal stability. Development of ...


Temperature Effects on Energy Production by Salinity Exchange

01-10-2014 | Silvia Ahualli; María M. Fernández; Guillermo Iglesias; Ángel V. Delgado; María L. Jiménez, Environmental Science & Technology, 2014

In recent years, the capacitance of the interface between charged electrodes and ionic solutions (the electric double layer) has been investigated as a source of clean energy. Charge is placed on the electrodes either by means of ion-exchange membranes or of an external power source. In the ...


Photocatalytic Oxidation of Aqueous Ammonia Using Atomic Single Layer Graphitic-C3N4

01-10-2014 | Hua Wang; Yan Su; Huanxin Zhao; Hongtao Yu; Shuo Chen; Yaobin Zhang; Xie Quan, Environmental Science & Technology, 2014

Direct utilization of solar energy for photocatalytic removal of ammonia from water is a topic of strong interest. However, most of the photocatalysts with effective performance are solely metal-based semiconductors. Here, we report for the first time that a new type of atomic single layer ...


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