Modified Sawdust as an Efficient Adsorbent for the Removal of Eosin Y Dye: Optimization, Isotherm, Regeneration of Adsorbent, and Real Sample Studies

محورهای موضوعی :

Leila Afrasiyabi ¹ , Shahla Elhami ² , Rostam Shabani ³

1 - Department of Chemistry, Firouzabad Branch, Islamic Azad University, Firouzabad, Iran
2 - Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
3 - Department of Chemistry, Firouzabad Branch, Islamic Azad University, Firouzabad, Iran

تاریخ دریافت : 1400/02/21 تاریخ پذیرش : 1402/08/23 تاریخ انتشار : 1402/12/26

کلید واژه: Adsorption, Removal, Freundlich isotherm, Eosin Y, Modified sawdust,

چکیده مقاله :

In the current investigation, the utilization of sawdust was modified through chemical means employing diethylenetriamine. This modified form of sawdust served as an effective adsorbent for the purpose of adsorbing Eosin Y dye from aqueous samples. The chemical modification procedure was thoroughly examined, comparing the fourier transform of infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) before and after the modification. Various factors including solution pH (ranging from 2 to 6), adsorbent dosage (ranging from 0.2 to 2.0 g L-1), contact time (ranging from 5 to 35 min), agitation rate, and initial dye concentration (ranging from 20 to 1000 mg L-1) were investigated. Remarkably, the modified sawdust exhibited a notable uptake capacity at ambient temperature and successfully removed approximately 96% of the Eosin Y dye with a mere 1.2 g L-1 of adsorbent in just 5 minutes. Moreover, it was discovered that the adsorbent maintained its promising adsorption ability even after undergoing ten cycles of adsorption and desorption. The Freundlich isotherm model was employed to determine the adsorption parameters. This methodology was also implemented to eliminate dye from authentic samples of diverse water sources.

چکیده انگلیسی:

In the current investigation, the utilization of sawdust was modified through chemical means employing diethylenetriamine. This modified form of sawdust served as an effective adsorbent for the purpose of adsorbing Eosin Y dye from aqueous samples. The chemical modification procedure was thoroughly examined, comparing the fourier transform of infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) before and after the modification. Various factors including solution pH (ranging from 2 to 6), adsorbent dosage (ranging from 0.2 to 2.0 g L-1), contact time (ranging from 5 to 35 min), agitation rate, and initial dye concentration (ranging from 20 to 1000 mg L-1) were investigated. Remarkably, the modified sawdust exhibited a notable uptake capacity at ambient temperature and successfully removed approximately 96% of the Eosin Y dye with a mere 1.2 g L-1 of adsorbent in just 5 minutes. Moreover, it was discovered that the adsorbent maintained its promising adsorption ability even after undergoing ten cycles of adsorption and desorption. The Freundlich isotherm model was employed to determine the adsorption parameters. This methodology was also implemented to eliminate dye from authentic samples of diverse water sources.

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