AI Article Synopsis
- Zeolites made from biomass waste, particularly coal fly ash, provide a sustainable solution for waste management and resource utilization.
- Energy-efficient methods, like microwave and ultrasound irradiation, were used to create pure-phase sodalite with a high surface area and cation exchange capacity in just 40 minutes.
- This sodalite demonstrated superior ammonium removal efficiency compared to raw coal fly ash and commercial zeolite, achieving 82% removal in lab conditions and 73% in real urine samples, following a specific adsorption model.
Article Abstract
Zeolites synthesized from biomass waste materials offer a great opportunity in the sustainable utilization of the waste. In this work, energy-efficient processes ( microwave and ultrasound irradiation) were used to synthesize pure phase sodalite (zeolite) from coal fly ash obtained from a power plant in South Africa. The pure-phase sodalite was obtained with a comparatively higher surface area (16 m g) and cation exchange capacity (2.92 meq. g) with 40 min total reaction time. The removal of ammonium from urine was carried out using (i) the coal fly ash-derived sodalite, (ii) raw coal fly ash and (iii) a commercially available natural zeolite (clinoptilolite). The pure phase sodalite exhibited the highest removal efficiency of about 82% and 73% in synthetic and real hydrolyzed urine respectively. The adsorption process followed the pseudo second-order kinetic model and the Freundlich adsorption isotherm, indicating that the adsorption process occurred on a heterogeneous surface.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9048987 | PMC |
| http://dx.doi.org/10.1039/c9ra10114d | DOI Listing |
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