Removal of copper (II) from aqueous solutions by adsorption onto granular activated carbon in the presence of competitor ions

سال انتشار: 1395
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 364

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شناسه ملی سند علمی:

JR_AET-2-2_004

تاریخ نمایه سازی: 21 فروردین 1397

چکیده مقاله:

In this work, the removal of copper from an aqueous solution by granularactivated carbon (GAC) in the presence of competitor ions was studied. A batchadsorption was carried out and different parameters such as pH, contact time,initial copper concentration and competitor ions concentration were changed todetermine the optimum conditions for adsorption. The optimum pH required formaximum adsorp on was found to be 4.5 for copper. Equilibrium was evaluatedat 144 h at room temperature. The removal efficiency of Cu(II) was 71.12% at thistime. The kinetics of copper adsorption on activated carbon followed the pseudosecond-order model. The experimental equilibrium sorption data were testedusing the Langmuir, Freundlich, Temkin and Dubinin–Radushkevich (D-R)equations and the Langmuir model was found to be well fitted for copperadsorption onto GAC. The maximum adsorption capacity of the adsorbent forCu(II) was calculated from the Langmuir isotherm and found to be 7.03 mg/g.Subsequently, the removal of copper by granular activated carbon in thepresence of Ag1+and Mn2+as competitor ions was investigated. The removalefficiency of Cu(II) ions without the presence of the compe tor ions was 46% at 6h, while the removal efficiency of Cu(II) ions in the presence of competitor ions,Ag1+and Mn2+, was 34.76% and 31.73%, respec vely.

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نویسندگان

Saeed Almohammadi

Department of Chemical Engineering, Mahshahr Branch, Islamic Azad University, Mahshahr, Iran