Abstract
Objective: Massive quantity of Raw Fly Ash (RFA) is generated during incineration due to rapid surge in global energy needs posing severe threat to natural balance owing to constraints associated with its storage and disposal. There exists a pressing and ongoing need to recycle RFA into novel mesoporous geopolymer that can sanitize aqueous medium from hazardous As (III) posturing bioaccumulation. Methodology: NaOH activated Fusion based Hydrothermal Technique (FUHT) was applied for synthesis of sodium zeolites from cost effective Si and Al source i.e. RFA. The characteristics like morphology and surface porosity, surface chemistry and crystallinity in conjunction with ion exchangeability of the Geopolymerized Sodium Zeolite (GSZ) were evaluated by SEM, FTIR, XRD and CEC techniques, respectively. We investigated that scavenging performance of the adsorbent for sequestration of As (III) via ICP-AES and optimized at pH ≈ 8 for 30 minutes by using 150 mg of adsorbent dose. Findings: Adsorption results confirmed that the developed sodium zeolite composites favor multilayer heterogeneous adsorption isotherm. Application: The effort towards industrial waste recycling into value added materials is an emergent move toward achieving a sustainable environment. Keywords: Adsorbent Materials, As (III) Removal, Fly Ash, Water Treatment, Zeolite Synthesis
Highlights
Hazardous wastes are exhausted all over the world by industries and their discarding attitude poses foremost challenges and severe environmental issues
Raw Fly Ash (RFA) grab sample was procured as raw aluminosilicate source from Electrostatic Precipitator (ESP) of the boiler plants at Shabbir dyeing industry, Shadman road, Faisalabad, Pakistan
Increase in LOI of Fusion based Hydrothermal Technique (FUHT) is linked to the moisture contents even after oven drying at 80○C
Summary
Hazardous wastes are exhausted all over the world by industries and their discarding attitude poses foremost challenges and severe environmental issues. The green recycling of Raw Fly Ash (RFA) into Geopolymerized Sodium Zeolite (GSZ) contributes to the environmental remedy, generally in the field of solid waste management. There are vast challenges all over the world concerning the management of waste water for a sustainable environment. Waste water treatment and management is the last line of defense designed for water pollution in the world. Carcinogenic and mutagenic nature of heavy metals like As, Hg, Pb and Cd are classified as a priority pollutant[1]. These metals are renowned toxicants even at minor concentrations, which
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