Then, SA solution (2.0 wt%) was mixed with the geopolymer slurry prior to the addition of egg white. The geopolymer slurry was firstly prepared by using sodium hydroxide (NaOH) as the alkaline activator with mass ratio of FA to NaOH was 3:1. Additional to that, natural egg white was utilized as the foaming agent. The GSA adsorbent preparation involved a simple method where the FA based geopolymer entrapped into sodium alginate followed by cross-linking of Ca 2+ ion and sodium alginate (SA). In this work, high-porosity hybrid fly ash (FA) geopolymer/sodium alginate (GSA) adsorbent was produced and used as an effective and economical adsorbent in the treatment of batik wastewater.
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