Synthesis and Characterization of Zeolite-Geopolymer Composites for Water Treatment.

Thanh Tu Doan; Mai Hien Trinh Nguyen; Thi Truc Phuong Nguyen; Hoa Hung Lam; Tran Hoang Duong Ngo; Van Dung Nguyen; Quang Long Nguyen

This research has studied the synthesis of zeolite-based geopolymer materials with different Si/Al ratios using kaolin and zeolite A with simple, scalable, ambient condition and low-cost method. Along with that, the mechanical strength, density, and pellet formability of the materials were also investigated. Consequently, research introduced zeolite-based geopolymer material with high zeolite content but still kept acceptable strength in water. The metal adsorption capacity was conducted at various initial concentrations and between samples with different Si/Al ratios to provide a suitable kinetic and thermodynamic model for the adsorption process. This study demonstrated that optimized 1.15 Si/Al ratio zeolite-geopolymer composites, which contain 62.4% zeolite, can be a promising adsorbent for removing heavy metal ions from water with 23.15 mg/g for Cu2+ and 12.38 mg/g for Fe3+ maximum adsorption capacities.

WATER purification; KAOLIN; ADSORPTION capacity; HEAVY metals; ADSORPTION kinetics; METAL ions

Annales de Chimie Science des Matériaux, 2023, Vol 47, Issue 3, p187

0151-9107

Academic Journal

10.18280/acsm.470308