Synthesis of nanogeopolymer adsorbent and its application and reusability in the removal of methylene blue from wastewater using response surface methodology (RSM)

Organic dyestuff are mostly toxic compounds that pose serious dangers to the environment. Adsorption using low-cost adsorbents is the most favorable method for its economic aspects. Recently, geopolymers have been introduced as an effective adsorbent for dyes and heavy metals. In this investigation,...

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Bibliographic Details
Published in:Scientific reports 2024-09, Vol.14 (1), p.20631-24, Article 20631
Main Authors: Abdel Hamid, E. M., Aly, H. M., El Naggar, K. A. M.
Format: Article
Language:English
Subjects:
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Adsorption
Box-Behnken design
Color removal
Dyes
Fourier transforms
Heavy metals
Humanities and Social Sciences
Infrared spectroscopy
Methylene blue
multidisciplinary
Nanogeopolymer
Optimization
RSM
Scanning electron microscopy
Science
Science (multidisciplinary)
Transmission electron microscopy
Variance analysis
X-ray diffraction
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Summary:Organic dyestuff are mostly toxic compounds that pose serious dangers to the environment. Adsorption using low-cost adsorbents is the most favorable method for its economic aspects. Recently, geopolymers have been introduced as an effective adsorbent for dyes and heavy metals. In this investigation, the synthesis of geopolymers from fired brick waste (Homra) was studied with full characterization using X-ray Diffraction, Fourier Transform Infrared Spectroscopy, Brunauer–Emmett–Teller, Energy dispersive X-ray, Scanning electron microscope tests and Transmission electron microscopy. The synthesized nano-Homra geopolymer (NHGP) was then subjected to the removal of one of the most used basic dyes, Methylene Blue (MB). Adsorption optimization was applied using Response surface methodology to study dye adsorption by the synthesized nano-geopolymer. The independent variables studied were: temperature, contact time, and concentration of dye in the elimination process, which were varied in the range of (25–60 ℃), (10–180 min), and (20–300 mg/L) respectively. The results obtained from ANOVA indicated that the maximum removal efficiency of 95% and adsorption capacity of 80.65 mg/g at a temperature of 59 ℃, contact time of 163 min, and an initial concentration of 254 mg/L. The results showed that the data obtained from the adsorption of MB onto NHGP was compatible with the Pseudo second order (R 2  = 0.9838) and Langmuir isotherm model (R 2  = 0.9882).
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-024-70284-y