Stability mechanism of the silica suspension in the Sinorhizobium meliloti 1021 exopolysaccharide presence

作者：Szewczuk Karpisz Katarzyna^*; Wisniewska Malgorzata; Pac Sosinska Malgorzata; Choma Adam; Komaniecka Iwona

来源：Journal of Industrial and Engineering Chemistry, 2016, 35: 108-114.

DOI：10.1016/j.jiec.2015.12.018

• Adsorption
• Exopolysaccharide
• Silica
• Stability
• Zeta potential

This paper describes the electrokinetic, adsorption and stability properties of the silica-exopolysaccharide Sinorhizobium meliloti (EPS). Exopolysaccharide adsorbs on the silica surface in the whole pH range, but the adsorption amount increases with the pH growth (at pH 9 approx. 0.8 mg/m(2)). The EPS adsorption affects the electrokinetic and stability properties of the system. At low pH values (3 and 4.6) the increase in the system stability occurs (electrosteric interactions), whereas at higher (7.6 and 9) the light system destabilization was noted (formation of a single polymer bridges between particles).

• 出版日期2016-3-25