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A Molecular Dynamics Study Of Water Confined In Between Two Graphene Sheets Under Compression, Ming-Lang Tseng, Ayomide Adesiyan, Abdelaziz Gassoumi, Nima E. Gorji

Articles

Several studies have demonstrated interest in creating surfaces with improved water interaction and adaptive properties because the behavior of water confined at the nanoscale plays a significant role in the synthesis of materials for technological applications. Remarkably, confinement at the nanoscale significantly modifies the characteristics of water. We determine the phase diagram of water contained by graphene stack sheets in slab form, at T=300 K, and for a constant pressure using molecular dynamics simulations. We discover that, as shown in the simulation, water can exist in both the liquid and vapor phases depending on the confining geometry and compressibility ratio. …

Review Of Analytical Techniques For Arsenic Detection And Determination In Drinking Water, Abhijnan Bhat, Tony O'Hara, Furong Tian, Baljit Singh Dr.

Articles

Arsenic occurs in the natural environment in four oxidation states: As(V), As(III), As(0) and As(−III). The behavior of arsenic species changes depending on the biotic or abiotic conditions in water. In groundwater, arsenic is predominantly present as As(III) and As(V), with a minor amount of methyl and dimethyl arsenic compounds being reported. Global intake of As(III) and As(V) via drinking water and food has dramatically increased in recent years. The commonly used term inorganic arsenic includes both As(III) and As(V) species and constitutes the highest toxicological risk associated with arsenic in water compared to the organic arsenic species. Inorganic arsenic …

A Housing Crisis: The Story Of The Syringa Mobile Home Park And The Law Clinic's Quest For Water, Jessica M. Long

Articles

No abstract provided.

Carbon Dioxide Measurement In Irish Blanket Peatlands: An Assessment Of Pool-Soil Flux Variability, Mariya Radomski, Alan Gilmer, Vivienne Byers, Eugene Mcgovern

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Peatlands have been recognised as having a significant role in the mediation of atmospheric carbon dioxide (CO2) levels with direct implications for global climate change. Longitudinal in situ measurement systems for CO2 concentrations in blanket peatland ecosystems are difficult to implement where the nature of terrestrial–aquatic connectivity and hydrodynamics have a significant effect on the carbon cycle. The need for greater data on CO2 concentrations and flux monitoring in these settings has been well recognised. However, applying the most appropriate monitoring approach presents a special challenge. This paper sets out the development of a direct method for field based longitudinal …

Degradation Kinetics Of Cold Plasma-Treated Antibiotics And Their Antimicrobial Activity, Chaitanya Sarangapani, Dana Ziuzina, Patrice Behan, Daniela Boehm, Brendan F. Gilmore, Patrick Cullen, Paula Bourke

Articles

Antibiotics, such as ofloxacin (OFX) and ciprofloxacin (CFX), are often detected in considerable concentrations in both wastewater effluents and surface water. This poses a risk to non-target organisms and to human health. The aim of this work was to study atmospheric cold plasma (ACP) degradation of antibiotics in water and meat effluent and to explore any residual antimicrobial activity of samples submitted to the plasma process. The results revealed that ACP successfully degraded the studied antibiotics and that the reaction mechanism is principally related to attack by hydroxyl radicals and ozone. According to the disk diffusion assay, the activity of …

Effect Of Hydrofracking On Aquifers, Abdullah Faruque, Joshua Goldowitz

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Geologists have understood the presence of shale gas and shale oil since the early 20th century, but always considered it unattainable due to shale’s low permeability. The shale gas revolution in the United States, brought about by the combination of horizontal drilling and hydraulic fracturing has proven the feasibility of economically accessing this resource and significantly increasing the world’s proven reserve. As we enter the era of application of this technology worldwide, countries will have to weigh the promise of increased energy independence and hydrocarbon revenue against the potential damage to water supplies. Hydrofracking’s voracious thirst for water and potential …

Anti-Bacterial Activity Of Indoor Light Activated Photocatalysts, Suresh Pillai, Michael Seery, Damian Synnott, Stephen Hinder, Georg Michlits

Articles

Nanocrystalline photocatalysts, prepared under ambient conditions using a microwave assisted syn-thesis, show indoor light photocatalytic activity for the degradation of Staphylococcus aureus and Escherichia coli. The zinc sulphide (ZnS) nanomaterials, prepared by a microwave assisted synthesis, are shown to be cubic blende structure with an average crystallite size of 4–6 nm. The anti-bacterial activ-ity of these nanomaterials is investigated under irradiation from a 60 W light bulb and photocatalytic activity is revealed to be due to the defects present in the crystal structure. The ZnS shows anti-bacterial action as both a bacteriostatic and bacteriocidal (88% reduction in the amount of …

A Highly Efficient Tio2-Xcx Nano-Heterojunction Photocatalyst For Visible-Light Induced Antibacterial Applications, Vinodkumar Etacheri, Michael Seery, Stephen Hinder, Georg Michlits, Suresh Pillai

Articles

Visible-light-induced antibacterial activity of carbon-doped anatase-brookite titania nano-heterojunction photocatalysts are reported for the first time. These heterostructures were prepared using a novel low temperature (100 °C) non-hydrothermal low power microwave (300 W) assisted method. Formation of interband C 2p states was found to be responsible for the band gap narrowing of the carbon doped heterojunctions. The most active photocatalyst obtained after 60 minutes of microwave irradiation exhibits a 2-fold higher visible-light induced photocatalytic activity in contrast to the standard commercial photocatalyst Evonik-Degussa P-25. Staphylococcus aureus inactivation rate constant for carbon-doped nano-heterojunctions and the standard photocatalyst was 0.0023 and -0.0081 min …

A Review On The Visible Light Active Titanium Dioxide Photocatalysts For Environmental Applications, Miguel Pelaez, Nicholas Nolan, Suresh Pillai, Michael Seery, Polycarpos Falaras, Athanassios G. Kontos, Patrick S.M. Dunlop, Jeremy W.J. Hamiltone, J. Anthony Byrne, Kevin O’Shea, Mohammad H. Entezari, Dionysios D. Dionysiou

Articles

Development of visible light active (VLA) titania photocatalysts

Fujishima and Honda (1972) demonstrated the potential of titanium dioxide (TiO 2) semiconductor mate-rials to split water into hydrogen and oxygen in a photo-electrochemical cell. Their work triggered the development of semiconductor photocatalysis for a wide range of environmental and energy applica-tions. One of the most significant scientific and commercial advances to date has been the development of visible light active (VLA) TiO2 photocatalytic materials. In this review, a background on TiO2 struc-ture, properties and electronic properties in photocatalysis is presented. The development of different strategies to modify TiO2 for the utilization …

Technology Platform For Sampling Water With Electrolyte-Gated Organic Transistors Sensitised With Langmuiur-Deposited Calixarene Surface Layers., Delia Puzzovio, Abdullah Al Naim, Lee Hague, Mary Deasy, James P. Ward, Tim Richardson, Martin Grell

Articles

We demonstrate a technology platform that enables the development of new, surface-sensitised organic transistor sensors. We show that an organic semiconductor can still be gated by an electric double layer within the electrochemical window of water after the deposition of up to four Langmuir- Schäfer calixarene layers onto its surface. Since many calixarenes are known to selectively bind waterborne cations, this facilitates sensitising a conventional organic semiconductor with a physically deposited layer for specific cation recognition. When at least two Langmuir-Schäfer layers are deposited, these also block the electrochemical doping of the organic semiconductor, which otherwise competes with the field …

A Highly Efficient Ag-Zno Photocatalyst: Synthesis, Properties, And Mechanism, Suresh Pillai, Michael Seery, Reenamole Georgekutty

Articles

Highly photocatalytically active silver-modified ZnO has been prepared and the effect of silver modification was studied. The structural and optical properties were characterized by X-ray diffraction, Fourier transform IR, differential scanning calorimetry, BET surface area, Raman, UV-vis, and photoluminescence spectroscopy. The photocatalytic activity of these materials was studied by analyzing the degradation of an organic dye, rhodamine 6G (R6G), and it is found that 3 mol % silver-modified ZnO at 400°C shows approximately four times higher rate of degradation than that of unmodified ZnO and a three times higher rate than that of commercial TiO 2 photocatalyst Degussa P-25. It …

Silver Doped Titanium Dioxide Nanomaterials For Enhanced Visible Light Photocatalysis, Michael Seery, Reena George, Suresh Pillai, Patrick Floris

Articles

This paper presents a systematic study on two different preparation methods for titanium dioxide with silver. The silver can be incorporated by irradiating the reaction mixture during preparation to reduce silver ion to silver metal or by direct calcination of the sol–gel material to decompose silver nitrate to silver. Of the two methods, we found the latter produces a more effective photocatalytic material (6–50% improvement in catalytic efficiency), which is attributed to the fact that the silver is homogeneously dispersed throughout the material. The efficiency of the materials were examined using a Q-Sun solar simulator (visible light) and in Dublin …

Synthesis Of High-Temperature Stable Anatase Tio2 Photocatalyst, Suresh Pillai, Declan Mccormack, Michael Seery, Pradeepan Periyat, Steven Hinder, John Colreavy, Reenamol George, Hugh Hayden

Articles

In the absence of a dopant or precursor odification, anatase to rutile transformation in synthetic TiO2 sually ccurs at a temperature of 600 700 °C. Conventionally, metal oxide dopants (e.g., Al2O3 nd SiO2 are used o tune the anatase to rutile transformation. A simple methodology is reported here to extend the anatase utile transformation by employing various concentrations of urea. XRD and Raman spectroscopy were used uring thermal treatment. A significantly higher anatase phase (97%) as been obtained at 800 C with use of a 1:1 Ti(OPr)4 urea composition and 11% anatase composition is etained even after calcining …

Preparing For Climatic Change: The Water, Salmon, And Forests Of The Pacific Northwest, Philip W. Mote, Edward A. Parson, Alan F. Hamlet, William S. Keeton, Dennis Lettenmaier, Nathan Mantua, Edward L. Miles, David W. Peterson, David L. Peterson, Richard Slaughter, Amy K. Snover

Articles

The impacts of year-to-year and decade-to-decade climatic variations on some of the Pacific Northwest’s key natural resources can be quantified to estimate sensitivity to regional climatic changes expected as part of anthropogenic global climatic change. Warmer, drier years, often associated with El Niño events and/or the warm phase of the Pacific Decadal Oscillation, tend to be associated with below-average snowpack, streamflow, and flood risk, below-average salmon survival, below-average forest growth, and above-average risk of forest fire. During the 20th century, the region experienced a warming of 0.8 ◦C. Using output from eight climate models, we project a further warming of …

Use Of Physics Based Models In Hyperspectral Image Exploitation, John Schott, Kyungsuk Lee, Rolando Raqueno

Articles

This paper describes a concept for using physics based models to support exploitation of remotely sensed image spectrometer data. It then reviews several methods from the literature illustrating more specifically how physics based models have been used as part of atmospheric correction, water quality assessment and temperature measurement algorithms. Finally a new approach for using model based techniques for subpixel target detection is presented This technique builds on a previously introduced invariant method that uses physics based models to support target detection of fully resolved targets without requiring in scene training or atmospheric correction. An example using the new subpixel …

Capture And Counteraction: Self- Help By Environmental Zealots (Allen Chair Symposium 1996: The Future Of Environmental And Land-Use Regulation), James E. Krier

Articles

Self-help is a largely neglected topic in American legal studies.1 With the exception of a survey by a group of law students published a dozen years ago,2 there appears to be little, if anything, in our legal literature that confronts the subject in a systematic way.3 This is so, at least, if one defines self-help as I do. To me, the term refers to any act of bypassing the formal legal system in order to get what one wants.

Waters And Water Courses - No Riparian Right In Montana, Evans Holbrook

Articles

Plaintiff owned lands through which a stream flowed; defendant, by virtue of an appropriation duly made, diverted all the water in the stream and used it for irrigation purposes. Plaintiff, claiming only as a riparian owner, sued to enjoin defendant's diversion of the stream on the ground that it was an invasion of riparian rights. Held, that the common law doctrine of riparian rights does not prevail in Montana, and that plaintiff's complaint does not state a cause of action.

Waters And Water Courses - The Effect Of The Desert Land Act Of 1877, Evans Holbrook

Articles

The Act of March 3, 1877, generally known as the Desert Land Act, provides for the sale of desert lands to persons who agree to irrigate and cultivate such lands. The act defines desert lands as lands which will not, without some irrigation, produce crops, and provides that the Commissioner of the General Land Office shall determine what may be considered as such lands; it provides also that the right to the use of water on such lands shall depend upon appropriation, and continues as follows: "and all surplus water over and above such actual appropriation and use, together with …

Rights In Percolating Waters, Ralph W. Aigler

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Almost without exception the courts approve of Acton v. Blundell, 12 M. & W. 324, to the extent of its actual decision,-that where as a result of improvement or enjoyment of one's own land one conducts operations which draw off percolating waters from a neighbor's land, even to the extent of drying up a well or spring, such inconvenience is to be deemed damnum absque injuria. The doctrine of the court "that the person who owns the surface may dig therein, and apply all that is there found to his own purposes at his free will and pleasure," if intended …

Rights In Percolating Waters, Ralph W. Aigler

Articles

Almost without exception the courts approve of Acton v. Blundell, 12 M. & W. 324, to the extent of its actual decision,-that where as a result of improvement or enjoyment of one's own land one conducts operations which draw off percolating waters from a neighbor's land, even to the extent of drying up a well or spring, such inconvenience is to be deemed damnum absque injuria. The doctrine of the court "that the person who owns the surface may dig therein, and apply all that is there found to his own purposes at his free will and pleasure," if intended …

The Right To Divert Water To Non-Riparian Land, Ralph W. Aigler

Articles

Though at one time in England there may have been some doubt as to the character of a riparian owner's rights in the waters of the stream, it must be considered as definitely settled by a series of cases that the doctrine of reasonable use by all the proprietors on the stream is the rule of the common law, and that the matter of priority of use or appropriation is, under that system, immaterial, unless, of course, a question of prescriptive right is involved. Wright v. Howard, 1 Sim. & S. 190; Mason v. Hill, 3 B. & Ad. 304, …

Liability Of Water Companies For Losses By Fire In Actions Of Tort, Ralph W. Aigler

Articles

In Fisher v. Greensboro Water Supply Company, 128 N. C. 375, it was held that the defendant water company was liable in damages in an action of tort for negligent failure to furnish sufficient water pressure in the mains of the city, by reason of which negligence the plaintiff's house was burned. The only duty on the part of the defendant to furnish water grew out of a contract made by the company with the city and the fact that the defendant had entered upon the business of supplying water pursuant to such contract.

Surface Water In Cities, John R. Rood

Articles

It is evident that no one hard and fast rule could be applied to all cases, either in city or country, without producing injustice and impolitic results. The needs and conditions in city and country are different. They usually differ widely in different parts of the same city. These considerations have induced the Supreme Court of New Hampshire to adopt the flexible rule, that: "In determining this question all the circumstances of the case would, of course, be considered; and among them the nature and importance of the improvements sought to be made, the extent of the interference with the …

Liability Of Water Companies For Fire Losses, Edson R. Sunderland

Articles

In two recent articles published'in this Review, the question of the liability of water companies for fire losses was somewhat exhaustively discussed. The majority of the actions wherein it has been sought to hold water companies liable for fire losses suffered by private property owners, have been brought for breach of contract. In a few cases the theory adopted was that the water company owed a duty to all property owners, by reason of the public character of its service; and the fact that it was under contract with the city to furnish an adequate water supply and pressure for …

The Liability Of Water Companies For Fire Losses, Edson R. Sunderland

Articles

It is a general principle, of very wide application, that a municipal corporation, in the absence of a statute, is not obliged to undertake the execution of governmental functions respecting the health, peace or property of its citizens. Nor is such corporation liable for the insufficient or negligent execution of such functions in case it undertakes to perform them. The ground of this exemption is that the municipality, in these matters, exercises discretionary powers conferred upon it by the state, and acts, not for itself in its corporate capacity, but for the general public as an agent of the central …

Title To Lands Under Fresh Water Lakes And Ponds, Thomas M. Cooley

Articles

In the Northwestern States there are innumerable lakes and ponds, which are largely resorted to for pleasure, and for the opportunities they furnish for the taking of game and fish. The scenery about them is, in most cases, picturesque and inviting, and they become favorite locations for residence. On some the navigation is valuable for business purposes; others are navigated for pleasure only. In surveying the public domain for the purposes of sale, the government caused all that were too large to be embraced within a single subdivision of a section, to be meandered at the water line, and the …

Incidental Injuries From Exercise Of Lawful Rights, Thomas M. Cooley

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In the present paper those cases will be considered in which one person suffers an injury in consequence of the exercise by another person of his legal rights. Many such cases occur in which, although the injury may be severe, the law will award no compensation, there being no tort in the case because there is an absence of that wrong the concurrence of which with damage is essential to an action. Negligence might supply the wrong, but we now speak of cases of which that is not an element.

Incidental Injuries From Exercise Of Lawful Rights, Thomas M. Cooley

Articles

In the present paper those cases will be considered in which one person suffers an injury in consequence of the exercise by another person of his legal rights. Many such cases occur in which, although the injury may be severe, the law will award no compensation, there being no tort in the case because there is an absence of that wrong the concurrence of which with damage is essential to an action. Negligence might supply the wrong, but we now speak of cases of which that is not an element.