English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The focus of this research is on the rapid ultrasound-assisted removal of Bismarck Brown (BB) and Thymol Blue(TB) dyes from aqueous solutions using Mn-Fe2O4 nanoparticles loaded on activated carbon (Mn-Fe2O4NPs-AC) as a low cost and environmental friendly adsorbent. The adsorbent was characterized by SEM, FTIR and XRD. The effect of variables such as initial concentration of BB, initial concentration of TB, pH of the solution, adsorbent dosage and sonication time on the removal percentages of BB and TB dyes were simultaneously investigated by central composite design(CCD) under response surface methodology(RSM). It was shown that the adsorption of BB and TB follows the pseudo-second-order rate equation, while the Langmuir model explains equilibrium data. Isotherms had also been used to obtain the thermodynamic parameters such as free energy (ÄG0), enthalpy (ÄH0) and entropy (ÄS0) of adsorption. The negative value of ÄG0 indicates the feasibility and spontaneity of the adsorption process. The positive ÄH0 suggests the endothermal nature of the adsorption. The positive values of ÄS0 reflects the affinity of Mn-Fe2O4NPs-AC towards BB and TB dyes. A small amount of the adsorbent was able to remove more than 99.0% of both dyes rapidly with high adsorption capacity in binary-component system( 70.3 mg/g for BB, and 48.48 mg/g for TB).

oriental journal of chemistry/oriental journal of chemistry

Application of Response Surface Methodology to Modeling and Optimization of Removal of Bismarck Brown and Thymol Blue by Mn-Fe2O4- NPs-AC: (Kinetics and Thermodynamic Studies)