Preconditioning of model biocarriers by soluble pollutants: a QCM-D study

ACS Applied Materials & Interfaces
Hui HuangYan Zhang

Abstract

Preconditioning of a biocarrier surface is the first step in triggering biofilm formation in attached-growth bioreactors. However, the quantification and control of this step as influenced by solution conditions and biocarrier properties have been rarely explored. In this paper, deposition behaviors of soluble pollutants on the model biocarriers polystyrene (PS) and polyamide (PA) were performed using a quartz crystal microbalance with dissipation monitoring (QCM-D). Three types of wastewater from municipal and industrial wastewater treatment plants and 12 synthetic wastewaters with different configurations of model macromolecules (bovine serum albumin and sodium alginate) and ionic compositions (Na(+) and Ca(2+)) were prepared. Results showed that high organic contents (protein and humic acid) in real wastewater increased deposition compared to the impact of ions on the two types of carriers. For synthetic wastewater, an interesting phenomenon was observed in that the presence of Ca(2+) can transform a thin and rigid adlayer into a denser and viscoelastic one on the surface of PS with low organic contents, yet a viscoelastic adlayer can directly form on PS and an increase in the ionic strength hinders deposition in the presenc...Continue Reading

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Citations

Nov 30, 2018·Applied Microbiology and Biotechnology·Hui HuangHongqiang Ren
May 12, 2021·Journal of Hazardous Materials·Sanaz SabaghiPedram Fatehi
Sep 1, 2020·The Journal of Physical Chemistry. B·Niloofar Alipoormazandarani, Pedram Fatehi

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