Raw bagasse and fly ash, the waste generated in sugar mills and boilers respectively have been used as... These low-cost adsorbents were used for the removal of chromium and nickel from an aqueous solution.... The efficiencies of adsorbent materials for the removal of Cr(VI) and Ni(II) were found to be between... The order of selectivity is powdered activated carbon > bagasse > fly ash for Cr(VI) removal and powdered... activated carbon > fly ash > bagasse for Ni(II) removal.
alternative to synthesizing formate from fossil fuels.... Here we show that Pd nanoparticles dispersed on a carbon support reach high mass activities (50-80 mA... HCO2(-) synthesis per mg Pd) when driven by less than 200 mV of overpotential in aqueous bicarbonate... solutions.... Activity is recovered, however, by removing CO with brief air exposure.
ABSTRACTA facile and scalable preparation of aqueous solutions of isolated, sparingly sulfonated graphene... from graphene oxide.... Herein, we describe a facile and scalable preparation of aqueous solutions of isolated, sparingly sulfonated... solution implies that the extensive conjugated sp 2 carbon network is restored in the water soluble... The oxidation chemistry is similar to that used to functionalize single-wall carbon nanotubes (SWNTs)
A laboratory-scale study was conducted in batch mode to investigate the feasibility of using zero-valent... magnesium (Mg(0)), for removal of nitrate from aqueous solution.... Nitrate removal rate decreased with solution pH and increased linearly with Mg(0) dose.... Nitrate removal was coupled with 96-100% removal of dissolved oxygen and 85-90% generation of soluble... An activation energy (E(a)) of nitrate reduction over the temperature range of 10-50 degrees C was observed
Adsorption isotherm and kinetics of methylene blue on activated carbon prepared from coconut husk were... determined from batch tests.... The effects of contact time (1-30 h), initial dye concentration (50-500 mg/l) and solution temperature... Coconut husk-based activated carbon was shown to be a promising adsorbent for removal of methylene blue... from aqueous solutions.
Bio-char by-products from fast wood/bark pyrolyses, were investigated as adsorbents for the removal of... A commercial activated carbon was also investigated for comparison.... In an aqueous lead solution with initial concentration of 4.8x10(-4) M, both oak bark and Calgon F-400... Oak bark (10 g/L) also removed about 70% of arsenic and 50% of cadmium from aqueous solutions.... carbon.
In this study, montmorillonite clay (MC) has been utilized as the adsorbent for the removal of a cationic... dye, methylene blue (MB), from aqueous solution by the batch adsorption technique under different conditions... of initial dye concentration, adsorbent concentration, contact time, solution pH, and temperature.... Attempts were made to fit the isothermal data using Langmuir and Freundlich equations.... The experimental data fitted the pseudo-second-order kinetic model, with an activation energy of +28.5
Sea salt particles are constantly produced from ocean surfaces by wave-wind interactions and removed... In this work, the thermodynamic and optical properties of sea salt aerosol particles generated from seawater... samples are measured at 25øC as a function of relative humidity, using a single-particle levitation... Water activities, densities, and refractive indices of aqueous solution droplets containing a single... aged sea salt aerosols may be modeled by external mixtures of the appropriate inorganic salts, whose solution
Bi2WO6 exhibited a high photoactivity to photodegrade rhodamine B in the central pH solution under visible... recycles for the photodegradation of rhodamine B, the catalyst did not exhibit any significant loss of activity... The total organic carbon measurement displayed that a high degree of mineralization was achieved in the... that the visible-light absorption band in the Bi2WO6 catalyst is attributed to the band transition from... This study provided a possible treatment approach for organic pollutants by using visible light in aqueous
The ability of the activated carbon to remove Ni(II), Co(II), Cd(II), Cu(II), Pb(II), Cr(III) and Cr(... VI) ions from aqueous solutions by adsorption was investigated.... Batch adsorption experiments were conducted to observe the effect of pH (1-6) on the activated carbon... The adsorptions of these metals were found to be dependent on solution pH.... carbon prepared from apricot stone (ASAC).