کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8953036 | 1645893 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Adsorption of Methylene Blue dye and Cu(II) ions on EDTA-modified bentonite: Isotherm, kinetic and thermodynamic studies
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
مهندسی محیط زیست
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چکیده انگلیسی
Dyes and metals are hazardous pollutants commonly found in industrial wastewaters requiring complex and expensive removal technologies. This study investigated the potential of ethylenediaminetetraacetic acid-modified Philippine bentonite (EMB) as a low-cost adsorbent material for the removal of Methylene Blue dye (MB) and copper ions (Cu(II)) from aqueous solutions. Batch adsorption experiments showed that EMB has superior adsorption capacity compared to the unmodified bentonite, with an enhancement of up to 40% for MB and more than 100% for Cu(II). The adsorption capacity of EMB improved with increasing solution pH and contact time and decreased with higher solution temperature and higher salt concentration in solution. The Langmuir isotherm model was found to best describe MB and Cu(II) adsorption on EMB with maximum capacity of 160 and 27 mg gâ1, respectively. The pseudo-second order kinetic model best fit the experimental data with R2 > 0.99. Lastly, the thermodynamic study confirmed that the adsorption process was spontaneous, exothermic and reversible.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sustainable Environment Research - Volume 28, Issue 5, September 2018, Pages 197-205
Journal: Sustainable Environment Research - Volume 28, Issue 5, September 2018, Pages 197-205
نویسندگان
Maria Leah Flor A. De Castro, Melody Love B. Abad, Divine Angela G. Sumalinog, Ralf Ruffel M. Abarca, Peerasak Paoprasert, Mark Daniel G. de Luna,