Studies on the Adsorption of Sulfapyridine at the Solution–Alumina Interface

Adsorption to goethite of extracellular polymeric substances from Bacillus subtilis

“…In particular, increased competition from counter-ions in the background electrolyte lead to a reduction in EPS adsorption. Counter-ions can bind to functional groups of EPS (Fleer et al, 1993) as well as the surface hydroxyl groups of goethite (Bajpai et al, 1997). The competitive effects of background electrolyte are likely to be enhanced at high I.…”

Adsorption behavior of selected monosaccharides onto an alumina interface

“…(1). Many other investigators [16,23,24] have also used the value of K as (k 1 /k 2 ), as adopted in the present study. The superiority of this method for evaluating the kinetic parameters lies in the fact that no [25] (such as in the Runge-Kutta method or Marquardt's optimization routine) are required and a simple linear plot will serve the purpose well.…”

“…In order to determine the point of zero charge (PZC), the procedure [16] reported in the literature was employed. The PZC of alumina in the presence/absence of Cl − and SO 2− 4 ions was determined employing potentiometric titrations of a suspension containing alumina (0.2 g) and 1.0 × 10 −3 l −1 mol KNO 3 as the supporting electrolyte in 50 ml solution.…”

Dynamic and equilibrium studies on adsorption of Cr(VI) ions onto binary bio-polymeric beads of cross linked alginate and gelatin

“…The adsorption was carried out by the contact method as described in our other communications [18][19][20]. In brief, into a 20 ml known solution of K 2 Cr 2 O 7 (245 mg dm −3 ) were added 0.2 g of swollen bio-polymeric beads at constant pH (6.0) and ionic strength (0.001 M KNO 3 ).…”