Effect of Aluminium Powder on Kaolin-Based Geopolymer Characteristic and Removal of Cu2+

Materials

MohdMustafa Al Bakri Abdullah¹  Nurliyana Ariffin¹  Shayfull Zamree AbdRahim¹  RamadhansyahPutra Jaya²  JerzyJ. Wysłocki³  Przemysław Postawa³  Katarzyna Błoch³  Marcin Nabiałek³  Agata Śliwa⁴  MohdFirdaus Omar⁵  Mohd Remy RozainyMohd Arif Zainol⁶ 

[1] Centre of Excellence Geopolymer and Green Technology (CEGeoGTech), Universiti Malaysia Perlis (UniMAP), 01000 Perlis, Malaysia;Department of Civil Engineering, College of Engineering, Universiti Malaysia Pahang (UMP), 26300 Pahang, Malaysia;Department of Physics, Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, 42-201 Częstochowa, Poland;Division of Materials Processing Technology and Computer Techniques in Materials Science, Silesian University of Technology, 44-100 Gliwice, Poland;Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis (UniMAP), 01000 Perlis, Malaysia;School of Civil Engineering, Engineering Campus, Universiti Sains Malaysia (USM), 14300 Pulau Pinang, Malaysia;

关键词: geopolymer;    adsorbent;    copper;    foaming agent;   

DOI  :  10.3390/ma14040814

来源: DOAJ

【 摘 要 】

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 Na₂SiO₃ 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 Cu²⁺ 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 Cu²⁺ 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 Cu²⁺.

【 授权许可】

Unknown