Removal of Ni (II) from aqueous solution using modified MCM-۴۱ nano-adsorbents
- سال انتشار: 1398
- محل انتشار: فصلنامه پیشرفت ها در فناوری محیط زیست، دوره: 5، شماره: 3
- کد COI اختصاصی: JR_AET-5-3_004
- زبان مقاله: انگلیسی
- تعداد مشاهده: 58
نویسندگان
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Department of chemistry, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran
چکیده
In this study, a synthetic and modified PPAP-MPTMS-MCM-۴۱ nano-adsorbent was used to remove nickel (II) during a batch process. Studying the parameters that were effective on adsorption revealed that the PPAP-MPTMS-MCM-۴۱ adsorbent was the most effective in the adsorption of nickel (II) from a standard solution (Conc. = ۵ mg/L, volume = ۱۰۰ mL) under the following conditions: pH=۸, contact time = ۲۰ min, ۶ wt.% of poly para-aminophenol (PPAP) ligand, adsorbent mass = ۰.۳ g, ۱ molar hydrochloric acid (to remove nickel from the adsorbent), and NaCl salt with a concentration of less than ۱۰۰ g/L. The results showed that the Langmuir isotherm had a higher linear and non-linear fitting with the experimental data. Investigating the kinetic models and mass transfer of this adsorption process showed that the experimental data were in good agreement with the pseudo-second-order kinetic model and the intra-particle mass transfer model. According to thermodynamic studies, this adsorption process is endothermic; its Gibbs free energy value is positive such that with an increase in temperature, it goes to lower values, and thus the process progresses spontaneously.کلیدواژه ها
Mesoporous MCM-۴۱, Nano-adsorbent, Isotherm, Nickelاطلاعات بیشتر در مورد COI
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