The results indicate that the Pb adsorption followed multiple first-order kinetics and the rate coefficient, activation energy, and pre-exponential factor in the Arrhenius equation of the adsorption varied greatly with the surface properties of the Fe oxides formed at various citrate/Fe(II) MRs. ...
The results indicate that the Pb adsorption followed multiple first-order kinetics and the rate coefficient, activation energy, and pre-exponential factor in the Arrhenius equation of the adsorption varied greatly with the surface properties of the Fe oxides formed at various citrate/Fe(II) MRs. ...
(H2CO in that equation is equivalent to CH2O, which is geochemists' shorthand for organic carbon.) The burial rate of organic carbon was set equal to 2% of the net primary productivity (NPP) in these calculations. This is the value for the modern Black Sea, which is anaerobic and ...
L. High-pressure equation of state for NaCl, KCl, and CsCl. J. Appl. Phys. 42, 3239–3244 (1973). 59. Strässle, T., Klotz, S., Kunc, K., Pomjakushin, V. & White, J. S. Equation of state of lead from high-pressure neutron diffraction up to 8.9 GPa and its implication ...
The grafting density was estimated using the weight loss (loss-wt) and the surface area of IONPs determined by BET according to the following equation: Mnpolymer corresponds to the weight of polymer grafted. Na is Avogadro’s number and mNP is the mass of polymer-grafted iron oxide ...
sorption capacity decreased as the same when iron oxides was removed.Compared to one-site model based on first order kinetic equation,two-site model was more pertain to fit the adsorption dynamics of Cd2+ on the paddy soils.Quick adsorption rate constant of HN paddy soils decreased,while it ...
The carbon monoxide reduces the iron ore (in the chemical equation below, hematite) to molten iron, becoming carbon dioxide in the process: 3 CO + Fe2O3→ 2 Fe + 3 CO2 The flux is present to melt impurities in the ore, principally silicon dioxide sand and other silicates. Common fluxes...
NaH2PO4buffer (pH 6.7) at 25°C. Red line, fitted Michaelis-Menten curve of Nfo for NFM; blue line, fitted Michaelis-Menten curve of Nfo for NFF; each error bar represents standard deviation of three independent experiments. The inset table shows the Michaelis-Menten equation and the fitted ...
from the meso-trans-formylvinylporphyrin 157 (R = CHO), was reacted with lead tetraacetate in the presence of Et3N to give the macrocycle with a condensed oxazocine 158, as the result of oxidative cyclization as a single isomer relative to the exo-ethylidene bond (Equation 10) <2003CHE388...
In this technique, bacteria directly interact with heavy metal–contaminated sites by attaching to the metal salts and cause dissolution of metals as explained by the following equation: (3.2)MS2+H2O+3.5O2→M2++2SO42−+2H+ where MS2is an insoluble metal sulfide and M2+is a freemetal ion....