Add like
Add dislike
Add to saved papers

Synthesis and characterization of Au-NPs supported on carbon nanotubes: Application for the ultrasound assisted removal of radioactive UO 2 2+ ions following complexation with Arsenazo III: Spectrophotometric detection, optimization, isotherm and kinetic study.

The present study devoted to description of efficient removal of radioactive UO2 2+ ions (U(IV)) via complexation with Arsenazo III (ARS III) accelerated by ultrasound-assisted adsorption onto the Au-NPs supported on carbon nanotubes (Au-NPs-CNTs), which were characterized by conventional techniques such as FESEM, EDS and XRD. Central composite design (CCD) employed to model contribution of parameters viz. pH (2.5-8.5), adsorbent mass (5-25mg), UO2 2+ concentration (5-25mgL-1 ) and sonication time (1-5min) onto response. The predicted results optimum conditions corresponding achievement of maximum UO2 2+ removal efficiency are pH 5.5, 20mg of Au-NPs-CNTs, is highly applicability for removal of more than 98% of 25mgL-1 of UO2 2+ following 5min sonication. Through analysis of corresponding results based on evaluation according to UO2 2+ concentration were found significantly affect responds. ANOVA analysis revealed a high R2 (0.9950) & AP (51.79) and low SD (0.6078) & CV% (0.6703) values of regression model equation which completely ensure accuracy of the quadratic model. Langmuir isotherm model was applicable for description of adsorption data with maximum monolayer adsorption capacity of 133.3mgg-1 at 25°C and pH 5.5. Dubinin-Radushkevich (D-R) isotherm model based on mean sorption energy (E) reveal high contribution of physisorption (1.17-3.78kJmol-1 ) on adsorption process. Moreover, Pseudo-second-order kinetic model delivered a better correlation for the experimental data in comparison to the pseudo-first-order kinetic model and intraparticle diffusion mechanism.

Full text links

We have located links that may give you full text access.
Can't access the paper?
Try logging in through your university/institutional subscription. For a smoother one-click institutional access experience, please use our mobile app.

For the best experience, use the Read mobile app

Mobile app image

Get seemless 1-tap access through your institution/university

For the best experience, use the Read mobile app

All material on this website is protected by copyright, Copyright © 1994-2024 by WebMD LLC.
This website also contains material copyrighted by 3rd parties.

By using this service, you agree to our terms of use and privacy policy.

Your Privacy Choices Toggle icon

You can now claim free CME credits for this literature searchClaim now

Get seemless 1-tap access through your institution/university

For the best experience, use the Read mobile app