Centre for Diploma Studies (CeDS), Universiti Tun Hussein Onn Malaysia, 84600, Muar, Johor, Malaysia.
Advanced Membrane Technology Research Centre (AMTEC), Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia.
Chemosphere. 2019 Aug;228:241-248. doi: 10.1016/j.chemosphere.2019.04.118. Epub 2019 Apr 20.
Comparison studies in suspension and hybrid photocatalytic membrane reactor (HPMR) system was investigated by using Reactive Black 5 (RB5) as target pollutant under UVA light irradiation. To achieve this aim, hybrid TiO/clinoptilolite (TCP) photocatalyst powder was prepared by solid-state dispersion (SSD) methods and embedded at the outer layer of dual layer hollow fiber (DLHF) membranes fabricated via single step co-spinning process. TiO and CP photocatalyst were also used as control samples. The samples were characterized by Scanning Electron Microscopy (SEM), Energy Dispersion of X-ray (EDX), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) analyses. The result shows that TCP was actively functioned as photocatalyst in suspension system and 86% of RB5 photocatalytic degradation achieved within 60 min; however the additional step is required to separate the catalyst with treated water. In the HPMR system, even though the RB5 photocatalytic degradation exhibits lower efficiency however the rejection of RB5 was achieved up to 95% under UV irradiation due to the properties of photocatalytic membranes. The well dispersed of TCP at the outer layer of DLHF membrane have improved the surface affinity of DL-TCP membrane towards water, exhibit the highest pure water flux of 41.72 L/m.h compared to DL-TiO membrane. In general, CP can help on improving photocatalytic activity of TiO in suspension, increased the RB5 removal and the permeability of DLHF membrane in HPMR system as well.
采用 UVA 光照射，以活性黑 5（RB5）为目标污染物，对悬浮体和混合光催化膜反应器（HPMR）系统进行了对比研究。为了实现这一目标，采用固态分散（SSD）法制备了混合 TiO/斜发沸石（TCP）光催化剂粉末，并将其嵌入通过一步共纺丝工艺制备的双层中空纤维（DLHF）膜的外层。TiO 和 CP 光催化剂也被用作对照样品。通过扫描电子显微镜（SEM）、X 射线能谱（EDX）、X 射线衍射（XRD）和 Brunauer-Emmett-Teller（BET）分析对样品进行了表征。结果表明，TCP 在悬浮体系统中作为光催化剂发挥了积极作用，在 60 分钟内实现了 86%的 RB5 光催化降解；然而，需要额外的步骤来分离处理后的水和催化剂。在 HPMR 系统中，尽管 RB5 的光催化降解效率较低，但由于光催化膜的性质，在 UV 照射下仍能达到 95%的 RB5 去除率。TCP 在 DLHF 膜外层的良好分散提高了 DL-TCP 膜对水的表面亲和力，与 DL-TiO 膜相比，其纯水通量高达 41.72 L/m.h。一般来说，CP 可以提高 TiO 在悬浮体中的光催化活性，增加 RB5 在 HPMR 系统中的去除率和 DLHF 膜的渗透性。
