adsorption of methyl orange dye from water solutions by carboxylate group functionalized multi-walled carbon nanotubes

نویسندگان

m. rajabi

department of chemistry, shahre-rey branch, islamic azad university, shahre-rey, tehran, iran. o. moradi

department of chemistry, shahre-qods branch, islamic azad university, shahre- qods, tehran, iran. a. mazlomifar

department of chemistry, shahre-rey branch, islamic azad university, shahre-rey, tehran, iran.

چکیده

the present study was carried out to investigate the potential of carboxylate group functionalized multi-walled carbon nanotubes (mwcnt−cooh) adsorbent for the removal of methyl orange (mo) textile dye from aqueous solutions. the effects of ph, shaking time and temperature on adsorption capacity were studied; the contact time to obtain equilibrium at 298 ˚k was fixed at 25 min. the effect of temperature on adsorption process was evaluated from 298 to 338 ˚k. results showed that removal of methyl orange increased with increasing contact time and decreased with increasing ph and temperature. for methyl orange dye, the equilibrium data were best fitted to the langmuir isotherm model. the adsorbent was characterized by infrared spectroscopy, and scanning electron microscopy. the pseudo-second-order kinetic model provided the best fit to the experimental data compared with the elovich or pseudo-first-order or intra-particle diffusion kinetic adsorption models.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Adsorption of Methyl orange dye from Water solutions by carboxylate group functionalized multi-walled Carbon nanotubes

The present study was carried out to investigate the potential of carboxylate group functionalized Multi-walled carbon nanotubes (MWCNT−COOH) adsorbent for the removal of Methyl orange (MO) textile dye from aqueous solutions. The effects of pH, shaking time and temperature on adsorption capacity were studied; the contact time to obtain equilibrium at 298 ˚K was fixed at 25 min. The effect of te...

متن کامل

Adsorption of Methyl orange dye from Water solutions by carboxylate group functionalized multi-walled Carbon nanotubes

The present study was carried out to investigate the potential of carboxylate group functionalized Multi-walled carbon nanotubes (MWCNT−COOH) adsorbent for the removal of Methyl orange (MO) textile dye from aqueous solutions. The effects of pH, shaking time and temperature on adsorption capacity were studied; the contact time to obtain equilibrium at 298 ˚K was fixed at 25 min. The effect of te...

متن کامل

Dispersive Solid Phase Extraction of trace Pb(II) in water samples by New Fabricated Multi walled carbon nanotubes carboxylate

A novel, simple, sensitive and effective method has been developed for preconcentration of the trace Pb (II) ions in aqueous Samples by CNT carboxyl which in order to improve the performance of extraction and preconcentration was used. Amounting of the ions density in solution was performed by the method of flame atomic absorption spectrometry. The effective parameters on extraction such as: ef...

متن کامل

Acid violet 17 Dye Decolorization by Multi-walled Carbon Nanotubes from Aqueous Solution

Background: Dyes can cause many problems in environment. Therefore, removal of these contaminants before discharging wastewater to environment can reduce the environmental hazards. Adsorption is one of the usual processes for decolorizing from wastewater. Nanotubes are new adsorbents that can adsorb different compounds. This work aimed to investigate Acid violet 17 dye removal by adsorption usi...

متن کامل

Adsorption of Humic Acid On Multi-Walled Carbon Nanotubes

Background: Natural organic matters (NOMs) have the main role in formation of trihalomethanes. These compounds are in natural water sources due to biological activities. In the presented study, adsorption and separation of humic acid as an index of natural organic matters using multi-walled carbon nanotubes is evaluated. Methods: The experiments were carried out in bath adsorption reactors wit...

متن کامل

Highly water-soluble multi-walled carbon nanotubes amine-functionalized by supercritical water oxidation.

Multi-walled carbon nanotubes (MWNTs) have been amine-functionalized by eco-friendly supercritical water oxidation. The facilely functionalized MWNTs have high solubility (~84 mg L(-1)) in water and 78% transmittance at 30-fold dilution. The Tyndall effect is also shown for several liquids.

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
international journal of nano dimension

جلد ۶، شماره ۳، صفحات ۲۲۷-۲۴۰

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023