The chemical and physical properties of these sulfur treated ACFs have been evaluated to determine their mercury adsorption capacities.
The adsorptivity decreases with increasing mercury concentrations, whereas the adsorption capacity increases.
Techniques with potential for quantifying cellulose accessibility and the amorphogenesis step include measuring the water retention value, mean fibre size, nitrogen adsorption capacity and mercury porosimetry of the cellulosic substrate.
The initial rate of adsorption, i.e. the pseudo-first-order constant multiplied by the equilibrium adsorption capacity, increases with initial mercury concentration, as expected, since the driving force is increased [15].
Adsorption binding isotherms were evaluated using Langmuir and Freundlich models, showing high adsorption capacity for both inorganic and organic mercury species.
The contact time affecting adsorption capacity of molecular sieve was studied at different initial mercury concentration.
This implies that mercury adsorption onto the HMAS is more like a monolayer adsorption process with heterogeneous distribution It seemed that the equilibrium adsorption capacity was distinctively improved by increasing temperature from 303 K to 323 K.
For instance, the high sulfur content of polysulfone on AC improved mercury adsorption, resulting in a three-orders-of magnitude reduction in the concentration of mercury [48, 49].
Hence, mercury (II) ions could be acceptable adsorbed as a monolayer on the catalyst surface by the maximum adsorption capacity of 1250 mg g−1, the affinity constant of 0.0186 L mg−1, and adsorption constant of 50.074 mg−0.50.07450.074
The effects of mercury salts, i.e., Hg(NO3 2, HgSO4, and different acids, were also deeply investigated and showed that the adsorption capacity of Hg II) onto the SH-Fe3O4-NMPs decreased when Cl− existed.
