Adsorption is one of the most efficient ways to remove heavy metal from wastewater. In this study, the adsorptive removal of hexavalent chromium, Cr (VI) from aqueous solution was investigated using natural zeolite, clinoptilolite, in the form of hollow fibre ceramic membrane (HFCM). The HFCM sample was prepared using phase inversion-based extrusion technique and followed by sintering process at different sintering temperatures in the range of 900–1050 °C. The fabricated HFCM was characterised using scanning electron microscopy (SEM), contact angle, water permeability, and mechanical strength for all HFCMs sintered at different temperatures. The adsorption and filtration test of Cr (VI) were performed using an in-house water permeation set up with a dead-end cross-flow permeation test. An asymmetric structure with sponge- and finger-like structures across the cross-section of HFCM was observed using SEM. Based on the characterisation data, 1050 °C was chosen to be the best sintering temperature as the water permeability and mechanical strength of this HFCM were 29.14 L/m²∙h and 50.92 MPa, respectively. The performance of the HFCM in adsorption/filtration was 44% of Cr (VI) removal at the Cr (VI) concentration of 40 mg/L and pH 4. In addition, the mathematical model was also performed in simulating the experimental data obtained from this study. All in all, the natural zeolite-based HFCM has a potential as a single-step Cr (VI) removal by membrane adsorption for the wastewater treatment.

吸附是从废水中去除重金属的最有效方法之一。在这项研究中，使用中空纤维陶瓷膜（HFCM）的天然沸石斜发沸石研究了从水溶液中吸附去除六价铬Cr（VI）的方法。HFCM样品是使用基于相转化的挤压技术制备的，然后在900-1050°C范围内的不同烧结温度下进行烧结。使用扫描电子显微镜（SEM），在不同温度下烧结的所有HFCM来表征所制造的HFCM，接触角，水渗透性和机械强度。Cr（VI）的吸附和过滤测试是使用室内水渗透和死角交叉流渗透测试进行的。使用SEM观察到整个HFCM横截面具有海绵状和手指状结构的不对称结构。根据表征数据，选择1050°C作为最佳烧结温度，因为该HFCM的水渗透性和机械强度为29.14 L / m。² ∙h和50.92 MPa。在Cr（VI）浓度为40 mg / L和pH为4时，HFCM在吸附/过滤中的去除率为44％。这项研究。总而言之，基于沸石的天然HFCM具有通过膜吸附一步法去除铬（VI）的潜力，可用于废水处理。