Entrapment of Tyre Crumb Rubber in Calcium-Alginate Beads for Triclosan Removal

Abstract

The adsorption of triclosan (TCS) from aqueous media using tyre crumb rubber entrapped in calcium-alginate beads (TCR/CaAG beads) was investigated through batch experiments. In addition, the effect of solution pH on removal efficiency was also investigated. The maximum adsorption of TCS onto TCR/CaAG beads was approximately 83% at pH 7. The Langmuir and Freundlich adsorption isotherm models were used to depict the sorption process. Adsorbent reusability was investigated by performing a series of sorption/desorption experiments. The experimental results suggest that the TCR/CaAG beads are effective agents for the removal of TCS from an aqueous medium.

Molecular mechanism of lysozyme adsorption onto chemically modified alginate guar gum matrix

“…Negatively or positively charged polyelectrolyte matrixes have been used for enzyme immobilization, delivery of drugs, etc. [5][6][7]. In addition, the high adsorption capacity of small molecules, such as, heavy metals and aromatic contaminants in water, in polyelectrolyte non-soluble matrixes have been reported in previous works [8,9].…”

Adsorption of peroxidase from Raphanus sativus L onto alginate–guar gum matrix: Kinetic, equilibrium and thermodynamic analysis

“…There are a great number of papers where Alg is transformed into a non-soluble matrix adding Ca 2+ to the medium (Daly and Knorr, 1988; Spelzini et al., 2011). However, the working pH range of the matrix is limited and when Ca 2+ is lost by the matrix, the Alg – calcium complex is destroyed, being the polymer soluble (López-Morales et al., 2013). The spherical matrix is permeable to small molecules and macromolecules and they can interact with it by difference in their electrical charge.…”