College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
College of Geography and Environmental Sciences, Zhejiang Normal University, Jinhua 321004, PR China.
J Colloid Interface Sci. 2017 Nov 1;505:900-909. doi: 10.1016/j.jcis.2017.06.090. Epub 2017 Jun 27.
36 membrane material cases used in membrane bioreactors (MBRs) covering wide range of hydrophilicity/hydrophobicity were used to calculate thermodynamic interactions between membranes and foulants. It was found that adhesive fouling can be represented by the total interaction energy at minimum separation distance (h). No functional relationship between membrane hydrophilicity and adhesive fouling can be deduced. However, membrane hydrophilicity, in terms of water contact angle or interaction energy between two identical surfaces at h in water (ΔG), had high statistical correlations with adhesive fouling. This statistical correlations should be attributed to the major role of acid-base interaction in total interaction associated with adhesion in most of membrane cases. Moreover, the statistical correlations were independent of the changes in membrane surface roughness or hydrophilicity/hydrophobicity of foulants. These findings satisfactorily explained the inconsistent conclusions in the literature regarding effects of membrane hydrophilicity on adhesive fouling, giving implications for membrane fouling mitigation.
使用了 36 种用于膜生物反应器（MBR）的膜材料案例，涵盖了广泛的亲水性/疏水性范围，以计算膜与污染物之间的热力学相互作用。研究发现，粘着性污垢可以用最小分离距离（h）处的总相互作用能来表示。不能推断出膜亲水性与粘着性污垢之间的功能关系。然而，就水接触角或 h 处水中两个相同表面之间的相互作用能（ΔG）而言，膜亲水性与粘着性污垢之间具有高度的统计学相关性。这种统计学相关性应该归因于在大多数膜情况下，酸碱相互作用在与粘附相关的总相互作用中起主要作用。此外，这种统计学相关性独立于膜表面粗糙度或污染物亲水性/疏水性的变化。这些发现令人满意地解释了文献中关于膜亲水性对粘着性污垢影响的不一致结论，为膜污垢缓解提供了启示。
