Novel nitrogen-rich mesoporous carbon nanospheres (NMCN) with high surface area and ordered pore geometry are prepared via a facile pathway for efficient CO 2 capture contaminant removal applications.

The United States Environmental Protection Agency Contaminant Candidate List 3 lists strontium as a contaminant for potential regulatory consideration in drinking water. Very limited data is available on strontium removal from drinking water and as a result, there is an immediate need for treatment information. The objective of this work is to evaluate the effectiveness of coagulation/filtratio...

Chemical reduction has long dominated thinking about the mechanism of aqueous contaminant removal in the presence of metallic iron (e.g. Fe/H2O systems). However, a large body of experimental evidence indicates that chemical reduction is not adequate to satisfactorily explain the efficiency of Fe/H2O systems for several substances or classes of substances. By contrast, the alternative approach,...

We report a method for the selective chemisorption of oxygen and nitrogen in sealed cavities utilizing microdischarges between thin-film Ti electrodes. The method is used to remove contaminating air from both inert and organic gas environments, reducing the nitrogen and oxygen concentrations by factors of 50 and 16, respectively. A microchip-based optical emission spectroscopic sensor is used t...

Recently indoor air quality (IAQ) became an important issue and as a result researchers have developed a large number of different air quality indicators. This study focuses on air exchange efficiency (εa) and contaminant removal effectiveness (ε) as suitable indicators for use in design and on-site measurements. These two IAQ indicators were numerically studied and compared for five typical in...

Filter treatment may be a viable means for removing the nitrate (NO3), phosphate (PO4), and pesticides discharged with agricultural drainage waters that cause adverse environmental impacts within the U.S. on local, regional, and national scales. Laboratory batch test screening for agricultural drainage water treatment potential was conducted on 58 industrial product/byproduct filter materials g...

the efficiency of diazinon (as insecticides) and nitrate (related to nitrogen fertilizer) removal from contaminated water is investigated through nf membrane technique. the effects of nitrate concentration (40-160 mg/l), diazinon concentration (10-1000 µg/l) and ph (5-9) on the efficiency of a commercial polyamide nanofilter membrane at a constant pressure of (800 kpa) are investigated. the res...

The study evaluated the effect of salivary-contaminant removal methods on the bond strength of resin cement to hydrofluoric acid-etched ceramic. Treatment with a new cleaning paste resulted in bond strengths not significantly different from those obtained in phosphoric acid-treated, hydrofluoric acid-treated, and uncontaminated control groups; thus the paste may be considered an alternative to ...