Effective Removal of Heavy Metal Using Cellulose Nanocomposite Adsorbents: Response Surface Methodology
- سال انتشار: 1401
- محل انتشار: فصلنامه انرژی و محیط زیست ایران (ایرانیکا)، دوره: 13، شماره: 3
- کد COI اختصاصی: JR_IJEE-13-3_006
- زبان مقاله: انگلیسی
- تعداد مشاهده: 161
نویسندگان
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Department of Engineering, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
چکیده
Cellulose nanocomposites were synthesized and applied to the removal of Pb(II) from aqueous solution. The synthesized nanocomposite was characterized by FT-IR, XRD, SEM, TEM, and BET analyses. Removal experiments were carried out in laboratory scale and then evaluated by response surface methodology (RSM) with a Central-Composite Design. The effects of solution pH, contact tie, initial Pb(II) concentration, adsorbent dosage and temperature on the removal efficiency were evaluated. Analysis of variance (ANOVA) was employed to find which parameter has a significant effect on the removal efficiency. The best removal efficiency value was found to be at the initial solution pH of ۶.۵, temperature of ۳۴°C, initial ion concentration of ۱۰۰ mg/L and the adsorbent dosage of ۰.۷۴ g/L. At this condition, the removal efficiency of Pb(II) ions was ۹۲.۵۴%. The adsorption equilibrium data fitted well with Langmuir isotherm model and the adsorption process followed the pseudo-second-order and intra-particle diffusion kinetic model. Thermodynamic analysis suggests that the adsorption process is endothermic, with an increasing entropy and spontaneous in nature. Besides, the nanocomposite was reused in four successive adsorption–desorption cycles, revealing a good regeneration capacity of the adsorbent. The effects of coexist cation ions on the adsorption of Pb(II) under optimal condition was also investigated. All the results demonstrate that nanocomposite is a potential recyclable adsorbent for hazardous metal ions in wastewater system.کلیدواژه ها
Cellulose, Copper Removal, Heavy metal, response surface method, Zeoliteاطلاعات بیشتر در مورد COI
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