Research Article| June 01, 2011 Water Management Challenges Associated with the Production of Shale Gas by Hydraulic Fracturing Kelvin B. Gregory; Gregory 1Department Civil and Environmental Engineering Carnegie Mellon University, Pittsburgh, PA 15213-3890, USA E-mail: kelvin@cmu.edu; dzombak@cmu.edu Search for other works this author on: GSW Google Scholar Radisav D. Vidic; Vidic 2Department University 15261, vidic@pitt.edu David A. Dzombak Author Article Information Publisher:...

The exponential increase in fossil energy production from Devonian-age shale the Northeastern United States has highlighted management challenges for produced waters hydraulically fractured wells. Confounding these is a scant availability of critical water quality parameters this wastewater. Chemical analyses 160 flowback and samples collected Marcellus Shale gas wells Pennsylvania were correlated with spatial temporal information to reveal underlying trends. Chloride was used as reference...

The adsorptive capacity of activated carbons for phenolic compounds increases significantly in the presence dissolved oxygen (oxic conditions) due to oligomerization these through oxidative coupling reactions. With increased comes an increase amount irreversible adsorption, which is defined as adsorbate that cannot be recovered by solvent extraction. objective this study was determine impact oxygen-containing functional groups on carbon surface adsorption oxygen. capacities and group (SFG)...

The dynamics of granular activated carbon (GAC) adsorbers for the uptake gas-phase mercury was evaluated as a function temperature, influent concentration, and empty bed contact time. Sulfur-impregnated carbons exhibited enhanced removal efficiency over virgin due to formation mercuric sulfide on surface. effect sulfur impregnation method examined through experi ments conducted commercially available sulfur-impregnated (HGR) impregnated with in our laboratory (BPL-S). Although HGR BPL-S...

To understand the nature of H2S adsorption onto carbon surfaces under dry and anoxic conditions, effects pore structure surface chemistry were studied using activated fibers (ACFs) with different structures areas. Surface pretreatments, including oxidation heat treatment, conducted before adsorption/desorption tests in a fixed-bed reactor. Raw ACFs higher area showed greater retention sulfur, treatment further enhanced sulfur. The retained amount hydrogen sulfide correlated well basic...

Ammonia adsorption on single-walled carbon nanotubes (SWNTs) was studied by means of infrared spectroscopy at both cryogenic (approximately 94 K) and room 300 temperatures. At K, vacuum-annealed SWNTs showed no detectable ammonia uptake. However, the found to be sensitive functionalities defects nanotube surfaces. NH3 detected HNO3-treated nanotubes, characterized significant defects, prior vacuum annealing. desorbed from those above 140 indicating a weak adsorbate-nanotube interaction 30...

Radium occurs in flowback and produced waters from hydraulic fracturing for unconventional gas extraction along with high concentrations of barium strontium elevated salinity. is often removed this wastewater by co-precipitation or other alkaline earth metals. The distribution equation Ra the precipitate derived equilibrium lattice replacement reaction (inclusion) between Ra2+ ion carrier ions (e.g., Ba2+ Sr2+) aqueous solid phases applied to describe fate radium these systems. Although...

Microbial communities associated with produced water from hydraulic fracturing are not well understood, and their deleterious activity can lead to significant increases in production costs adverse environmental impacts. In this study, we compared the microbial ecology prefracturing fluids (fracturing source fluid) at multiple time points a natural gas southwestern Pennsylvania using 16S rRNA gene-based clone libraries, pyrosequencing, quantitative PCR. The majority of bacterial community...

Hydraulic fracturing for natural gas extraction from shale produces waste brine known as flowback that is impounded at the surface prior to reuse and/or disposal. During impoundment, microbial activity can alter fate of metals including radionuclides, give rise odorous compounds, and result in biocorrosion complicates water management increases production costs. Here, we describe ecology multiple depths three impoundments Marcellus were managed differently. 16S rRNA gene clone libraries...

Novel sulfur-impregnated activated carbons for vapor phase mercury uptake (BPL-S series) were designed and developed in this study. Temperature the initial sulfur to carbon ratio (SCR) during impregnation two control parameters procedure. By adjusting these variables, a series of was created. These new materials together with commercially available (HGR) coal samples evaluated elemental using nitrogen as carrier gas. The results showed that impregnated at high temperature exhibited highest...

Novel sulfur-impregnated activated carbons (SIACs) have shown excellent mercury uptake capacity when pure nitrogen was used as a carrier gas. This study investigated the impact of various gas constituents found in real flue on performance SIACs. Fixed-bed adsorber tests showed that CO2 (up to 15%) had no by SIAC, while presence O2 9%) increased adsorptive up 30%. Increase amount oxygen-containing acidic surface functional groups uptake, and it is postulated enhanced due formation HgO...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidative coupling of phenols on activated carbon: impact adsorption equilibriumRadisav D. Vidic, Makram T. Suidan, and Richard C. BrennerCite this: Environ. Sci. Technol. 1993, 27, 10, 2079–2085Publication Date (Print):September 1, 1993Publication History Published online1 May 2002Published inissue 1 September 1993https://pubs.acs.org/doi/10.1021/es00047a013https://doi.org/10.1021/es00047a013research-articleACS PublicationsRequest reuse...