Adsorption on a series of primary n-alkylammonium bentonites
was studied by simultaneous gravimetric determination of the adsorption
isotherm and X-ray diffraction measurement of the c-spacing.
All adsorbates gave typical Type II isotherms. BET plots
were linear in the region P/P[subscript o] = 0.10 - 0.35 and v[subscript m] values were...
The influence of pH (titration method) and of salt concentration
and drying (drying method) upon the formation of synthetic AI, Fe,
and Mg interlayers in montmorillonite and vermiculite was investigated.
Interlayer formation was evaluated by X-ray diffraction
measurements of basal spacings using a natural chlorite for comparison.
The titration method...
The effects of pH and time on the formation of hydroxy-Al, Fe,
and Mg interlayer were compared for montmorillonite and vermiculite.
The stability of interlayers was evaluated by sequentially increasing
the severity of dissolution treatments and by subjecting the inter-layers to an HC1 treatment. The interlayer formation and stability
were...
Water and methanol adsorption isotherms at 25° and 37° C.
were determined on a series of organo-bentonite clays. The clays
differed in the length of the carbon chain attached to the amine adsorbed
in the cation exchange position. The amines used had carbon
chains of 4, 6, 8, 10, 12,...
Heats of immersion were obtained for four different organophilic
clay complexes in a series of normal alcohol-heptane mixtures
with alcohols of increasing chain length. The immersion calorimeter
employed was the Dewar type with a sensitivity of approximately
5 x 10⁻⁵°C.
Gel volumes were determined for two of the clay complexes...
The formation of solution and solid complexes with heavy metals
will partially determine their mobility and plant availability in soil
systems. Experiments were initiated to determine the effect of pH,
adsorbent and initial metal concentrations, and the presence of water
soluble ligands on the adsorption of Cd and Cu by...