Fig. 8From: Fly ash-based geopolymers: an emerging sustainable solution for heavy metal remediation from aqueous mediumXRD sequence of untreated fly ash (a) the synthesized geopolymer (b) (H, Hematite; M, Mullite; Q, Quartz; Plag, Plagioclase; Zeo, Zeolite) [87]Back to article page