Ariffin Nurliyana, Abdullah Mohd Mustafa Al Bakri, Postawa Przemysław, Zamree AbdRahim Shayfull, Mohd Arif Zainol Mohd Remy Rozainy, Jaya Ramadhansyah Putra, Śliwa Agata, Omar Mohd Firdaus, Wysłocki Jerzy J, Błoch Katarzyna, Nabiałek Marcin
Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), 01000 Perlis, Malaysia.
Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis (UniMAP), 01000 Perlis, Malaysia.
Materials (Basel). 2021 Feb 8;14(4):814. doi: 10.3390/ma14040814.
This current work focuses on the synthesis of geopolymer-based adsorbent which uses kaolin as a source material, mixed with alkali solution consisting of 10M NaOH and NaSiO as well as aluminium powder as a foaming agent. The experimental range for the aluminium powder was between 0.6, 0.8, 1.0 and 1.2wt%. The structure, properties and characterization of the geopolymer were examined using X-Ray Diffraction (XRD), Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). Adsorption capacity and porosity were analysed based on various percentages of aluminium powder added. The results indicate that the use of aluminium powder exhibited a better pore size distribution and higher porosity, suggesting a better heavy metal removal. The maximum adsorption capacity of Cu approached approximately 98%. The findings indicate that 0.8% aluminium powder was the optimal aluminium powder content for geopolymer adsorbent. The removal efficiency was affected by pH, adsorbent dosage and contact time. The optimum removal capacity of Cu was obtained at pH 6 with 1.5 g geopolymer adsorbent and 4 h contact time. Therefore, it can be concluded that the increase in porosity increases the adsorption of Cu.
当前这项工作聚焦于以高岭土为原料合成地质聚合物基吸附剂，将其与由10M氢氧化钠和硅酸钠组成的碱溶液以及作为发泡剂的铝粉混合。铝粉的实验用量范围为0.6、0.8、1.0和1.2wt%。使用X射线衍射（XRD）、红外光谱（FTIR）和扫描电子显微镜（SEM）对地质聚合物的结构、性能和特征进行了检测。基于添加的不同百分比铝粉分析了吸附容量和孔隙率。结果表明，使用铝粉呈现出更好的孔径分布和更高的孔隙率，表明对重金属的去除效果更好。铜的最大吸附容量接近98%。研究结果表明，0.8%的铝粉是地质聚合物吸附剂的最佳铝粉含量。去除效率受pH值、吸附剂用量和接触时间的影响。在pH值为6、使用1.5 g地质聚合物吸附剂且接触时间为4小时的条件下，获得了铜的最佳去除容量。因此，可以得出结论，孔隙率的增加会提高对铜的吸附。
