View in EDS

Novel oxone treated hydrochar for the removal of Pb(II) and methylene blue (MB) dye from aqueous solutions.

Saved in:
Bibliographic Details
Title: Novel oxone treated hydrochar for the removal of Pb(II) and methylene blue (MB) dye from aqueous solutions.
Authors: Madduri, Sunith1 (AUTHOR), Elsayed, Islam1 (AUTHOR), Hassan, El Barbary1 (AUTHOR) e.hassan@msstate.edu
Source: Chemosphere. Dec2020, Vol. 260, pN.PAG-N.PAG. 1p.
Subjects: Methylene blue, Water purification, Aqueous solutions, Langmuir isotherms, Sorption, Adsorption kinetics, Adsorption isotherms
Abstract: This study represents the first ever work on a novel oxone treated hydrochar as an adsorbent for the efficient removal of different contaminants from aqueous solutions. Pine wood hydrochar (HC) was prepared by hydrothermal treatment at 300 °C and oxidized with oxone to produce oxidized pine wood hydrochar (OHC). Different analytical tools such as elemental analysis, FTIR, TGA, FE-SEM, and BET were used for the characterization of the OHC. Conductometric titration of OHC showed a substantial increase from 22 μmol/g to 600 μmol/g in the hydrochar carboxylic content. The OHC sorption performance was assessed by using Pb(II) ions and methylene blue (MB) dye as two models of contaminants. Sorption benchmarks were performed by varying the contaminant initial concentration, time, and temperatures. Sorption kinetic data was fitted well to the pseudo-second order kinetic model with high correlation coefficients (R2 > 0.99) and isothermal data was fitted to the Langmuir model. The highest adsorption capacities for MB and Pb(II) were 86.7 mg/g and 46.7 mg/g, respectively. This study proves that oxone treatment could be a potential sustainable oxidation method to tune the hydrochar surface to increase selectivity towards heavy metal ions and dye sorption. Image 1 • Oxone treated hydrochar can effectively remove metal ions/dyes from aqueous solutions. • Carboxylic content and solution pH greatly influence the adsorption process. • Adsorption kinetics of MB and Pb(II) fitted with the pseudo-second order equation. • Adsorption isotherms of MB and Pb(II) fitted with Langmuir adsorption model. • The maximum adsorption capacity of MB was 86.7 mg/g and Pb(II) was 46.7 mg/g. [ABSTRACT FROM AUTHOR]
Copyright of Chemosphere is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:This study represents the first ever work on a novel oxone treated hydrochar as an adsorbent for the efficient removal of different contaminants from aqueous solutions. Pine wood hydrochar (HC) was prepared by hydrothermal treatment at 300 °C and oxidized with oxone to produce oxidized pine wood hydrochar (OHC). Different analytical tools such as elemental analysis, FTIR, TGA, FE-SEM, and BET were used for the characterization of the OHC. Conductometric titration of OHC showed a substantial increase from 22 μmol/g to 600 μmol/g in the hydrochar carboxylic content. The OHC sorption performance was assessed by using Pb(II) ions and methylene blue (MB) dye as two models of contaminants. Sorption benchmarks were performed by varying the contaminant initial concentration, time, and temperatures. Sorption kinetic data was fitted well to the pseudo-second order kinetic model with high correlation coefficients (R2 > 0.99) and isothermal data was fitted to the Langmuir model. The highest adsorption capacities for MB and Pb(II) were 86.7 mg/g and 46.7 mg/g, respectively. This study proves that oxone treatment could be a potential sustainable oxidation method to tune the hydrochar surface to increase selectivity towards heavy metal ions and dye sorption. Image 1 • Oxone treated hydrochar can effectively remove metal ions/dyes from aqueous solutions. • Carboxylic content and solution pH greatly influence the adsorption process. • Adsorption kinetics of MB and Pb(II) fitted with the pseudo-second order equation. • Adsorption isotherms of MB and Pb(II) fitted with Langmuir adsorption model. • The maximum adsorption capacity of MB was 86.7 mg/g and Pb(II) was 46.7 mg/g. [ABSTRACT FROM AUTHOR]
ISSN:00456535
DOI:10.1016/j.chemosphere.2020.127683