This TA immobilization was performed on each PAN membrane support employed in this study (i.e. PAN, HPAN, HPAN_PEI), in order to evaluate the impact of the different steps of functionalization on the catalytic performance of the resulting immobilized TAs. Depending on the immobilization pH, TAs immobilized on pristine PAN were labelled as TA_PANa (if pH was 8) or TA_PANb (if pH was 5.5). Similarly, TAs immobilized on HPAN were labeled as TA_HPANxa or TA_HPANxb, where x = / stand for TAs immobilized on HPAN, x = 1 for HPAN_PEI (without post-treatment), x = 2 for HPAN_PEI (with SA post-treatment) and x = 3 HPAN_PEI (with GA post-treatment), respectively. TA_HPAN_xa or TA_HPAN_xb. In the case of TA_HPAN_2a, TA_HPAN_2b, TA_HPAN_3a and TA_HPAN3b, an additional post-treatment was applied (with SA or GA, respectively) before the rinsing step.