Hydrothermally synthesized MnO2 nanowires and their application in Lead (II) and Copper (II) batch adsorption

CLAROS, Martha, Jan KUTA, Omar EL-DAHSHAN, Jan MICHALICKA, Yecid P. JIMENEZ and Stella VALLEJOS. Hydrothermally synthesized MnO2 nanowires and their application in Lead (II) and Copper (II) batch adsorption. Journal of Molecular Liquids. Amsterdam: Elsevier B.V., 2021, vol. 325, March 2021, p. 1-11. ISSN 0167-7322. Available from: https://dx.doi.org/10.1016/j.molliq.2020.115203.

Basic information

• Original name: Hydrothermally synthesized MnO2 nanowires and their application in Lead (II) and Copper (II) batch adsorption
• Authors: CLAROS, Martha (724 Spain), Jan KUTA (203 Czech Republic, guarantor, belonging to the institution), Omar EL-DAHSHAN (203 Czech Republic), Jan MICHALICKA (203 Czech Republic), Yecid P. JIMENEZ (152 Chile) and Stella VALLEJOS (724 Spain).
• Edition: Journal of Molecular Liquids, Amsterdam, Elsevier B.V. 2021, 0167-7322.

Other information

• Original language: English
• Type of outcome: Article in a journal
• Field of Study: 10301 Atomic, molecular and chemical physics
• Country of publisher: Netherlands
• Confidentiality degree: is not subject to a state or trade secret
• WWW: URL
• Impact factor: Impact factor: 6.633
• RIV identification code: RIV/00216224:14310/21:00122256
• Organization unit: Faculty of Science
• Doi: http://dx.doi.org/10.1016/j.molliq.2020.115203
• UT WoS: 000636695200118
• Keywords in English: Hydrothermal synthesis; Heavy metal adsorption; MnO2 nanowires
• Tags: rivok
• Tags: International impact, Reviewed

Abstract

Manganese oxide (MnO2) nanowires with diameters of 20 nm to 100 nm are synthesized by hydrothermal method. Chemical characterization of these nanostructures demonstrates the formation of Mn(IV), corroborating the MnO2 compound. The nanowires were used as adsorbents of Pb(II) and Cu(II) ions from water in batch system at room temperature. The results indicate faster adsorption rates and better affinity towards Pb(II) compared to Cu(II), since the adsorption capacity (3.730 [mg.g(-1)]) and the percentage of removal (99.99%) at equilibrium for Pb(II) are higher than those for Cu(II), 2.972 [mg.g(-1)] and 75.48%. The kinetics of adsorption was described by a pseudo-second order rate model for both ions, and Weber and Morris intra-particle diffusion model was used to a better understanding of the process. In addition, the Langmuir and Freundlich models were used to describe the isotherms, the first model was better adjusted for Cu(II) adsorption and the later for Pb(II) adsorption.

Links

• EF17_043/0009632, research and development project: Name: CETOCOEN Excellence
• LM2015051, research and development project: Name: Centrum pro výzkum toxických látek v prostředí (Acronym: RECETOX RI)

Investor: Ministry of Education, Youth and Sports of the CR

• LM2018121, research and development project: Name: Výzkumná infrastruktura RECETOX (Acronym: RECETOX RI)

Investor: Ministry of Education, Youth and Sports of the CR, RECETOX RI

• 857560, interní kód MU(CEP code: EF17_043/0009632): Name: CETOCOEN Excellence (Acronym: CETOCOEN Excellence)

Investor: European Union, Spreading excellence and widening participation