BSA adsorbs with the highest affinity onto bare silica, possibly driven by several hydrogen bonds between silanoils on particles and carbonyls on the protein, but maximal adsorption is at lowest indicating the largest area per BSA molecule occupied at maximal adsorption among those in all media and adsorbates tested (Table 2).
Maximal adsorption was observed at a pH close to the pKa of the adsorbate, and decreases sharply at larger pH values.
While BSA appeared to be in a ordered end-on position occupying about 14 nm2 at maximal adsorption (Table 2) under conditions of moderate electrostatic attraction between BSA and silica/DODAB (1 mM NaCl, pH 6.3) further increasing this attraction drove massive BSA adsorption onto the particle as detected from the small area occupied per protein on the silica/DODAB surface, about 3 nm2 (Table 2).
It can be seen that at pH 6.5, the composite containing pectin FB300 shows good Sr2+ adsorption, while at pH 8, the maximal adsorption values are inherent for nHAp/pectin FB300, nHAp/pectin APA103, and nHAp/SA.
At 40 °C, the modified powders displayed a maximal adsorption capacity of 0.23 mmol/g that is smaller than the initial unmodified material.
At pH 9, the composites containing chitosan and agar have the maximal adsorption.
In the region of maximal adsorption, i.e. capacitance pit in the differential capacitance versus electrode potential curve, the heterogeneous adsorption and diffusion steps are the rate determining stages for camphor and 2,2′-BP adsorption at the Bi(1 1 1) electrode.
Titanium nano tube (TNT) catalysts were prepared to augment surface areas for maximal adsorption capacities.
The maximal adsorption capacity as estimated by the Langmuir model was 294.11 mg/g [7].
The dry condition is considered as the situation of the maximal adsorption capacity of the shale gas reservoir.
