School of Chemical Sciences, Universiti Sains Malaysia, 11800 Penang, Malaysia.
Bioresour Technol. 2013 Sep;143:584-91. doi: 10.1016/j.biortech.2013.06.055. Epub 2013 Jun 21.
Bioregeneration of mono-amine modified silica gel (MAMS) adsorbent loaded with Acid Orange 7 (AO7), Acid Yellow 9 (AY9) and Acid Red 14 (AR14), respectively, was investigated under two different operational conditions, namely absence/presence of sucrose/bacto-peptone as the co-substrate and different biomass acclimation concentrations. The results revealed that the AY9- and AR14-loaded MAMS adsorbents could almost be completely bioregenerated but only in the presence of co-substrate whereas the bioregeneration of AO7-loaded MAMS could achieve up to 71% in the absence of the co-substrate. These differences could be related to the structural properties of the investigated azo dyes. In addition, the results showed that the bioregeneration duration of AO7-loaded MAMS could be progressively shortened by using biomass acclimated to increasingly higher AO7 concentration. However, the bioregeneration efficiencies were found to be relatively unchanged under different biomass acclimation concentrations.
分别用单胺改性硅胶（MAMS）吸附剂负载的酸性橙 7（AO7）、酸性黄 9（AY9）和酸性红 14（AR14）进行生物再生研究，考察了两种不同操作条件下，即是否存在蔗糖/细菌蛋白胨作为共底物以及不同生物量驯化浓度的情况。结果表明，AY9 和 AR14 负载的 MAMS 吸附剂几乎可以完全在共底物存在的情况下进行生物再生，但 AO7 负载的 MAMS 吸附剂在没有共底物的情况下可以达到 71%的生物再生率。这些差异可能与所研究的偶氮染料的结构特性有关。此外，结果表明，通过使用驯化到 AO7 浓度逐渐升高的生物量，可以逐步缩短 AO7 负载的 MAMS 的生物再生时间。然而，在不同的生物量驯化浓度下，生物再生效率被发现相对不变。
