Advance modification of polyacrylonitrile nanofibers for enhanced removal of hexavalent chromium from water

Donya Sharafoddinzadeh; Maryam Salehi; Santa Jansone-Popova; Amali Herath; Linkon Bhattacharjee

doi:10.1002/app.52169

Advance modification of polyacrylonitrile nanofibers for enhanced removal of hexavalent chromium from water

Donya Sharafoddinzadeh, Maryam Salehi, Santa Jansone-Popova, Amali Herath, Linkon Bhattacharjee

Chemical Separations Group

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Hexavalent chromium [Cr(VI)] is a known carcinogenic and mutagenic heavy metal. Its level in drinking water is regulated worldwide to protect public health. This study presents a novel chemical method to modify the polyacrylonitrile (PAN) nanofibers for efficient Cr(VI) removal from water. The PAN nanofibers with an average diameter of 165 nm are produced using the electrospinning technique. Through a 2-step chemical modification process, the amidine polyacrylonitrile (APAN) nanofibers are synthesized by the conversion of nitrile groups [-C=N] in PAN nanofibers into amidines [-C(N═NH)(NH₂)]. The attenuated total reflectance Fourier transform (ATR-FTIR) spectroscopy revealed the successful conversion of nitrile groups into amidoximes, resulting in amidoximated polyacrylonitrile nanofibers, and subsequent conversion into amidine functional groups, forming the APAN nanofibers. Greater concentration of hydroxylamine hydrochloride, increased reaction time and temperature yielded higher conversion of nitrile groups into amidoximes to a maximum of 37%. The Cr(VI) uptake by APAN nanofibers was found as a multilayer adsorption process modeled by Freundlich isotherm. The maximum Langmuir Cr(VI) adsorption capacity for APAN nanofibers was found as 225 mg g⁻¹ at pH = 3.0 after 4.0 h exposure duration. The regeneration study revealed the excellent reusability of APAN nanofibers after five adsorption/desorption cycles.

Original language	English
Article number	52169
Journal	Journal of Applied Polymer Science
Volume	139
Issue number	20
DOIs	https://doi.org/10.1002/app.52169
State	Published - May 20 2022

Funding

The study reported in this paper was supported by the University of Memphis Division of Research and Innovation through the Office of Technology Transfer. The authors thank Dr. Felio Perez and Dr. Omar Skali in the Integrated Microscopy Center of the University of Memphis for assistance with FE‐SEM imaging. This work was supported by the U.S. Department of Energy, Office of Science, Basic Energy Sciences, Chemical Sciences, Geosciences, and Biosciences Division (S. J.‐P.).

Funders	Funder number
University of Memphis Division of Research and Innovation
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Chemical Sciences, Geosciences, and Biosciences Division

Keywords

hexavalent Chromium Cr(VI)
nanofibers
polyacrylonitrile (PAN)
wastewater treatment
water

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1002/app.52169

Cite this

@article{5b5b3c1d3adf4e9cb0ad2254bb72e9a0,

title = "Advance modification of polyacrylonitrile nanofibers for enhanced removal of hexavalent chromium from water",

abstract = "Hexavalent chromium [Cr(VI)] is a known carcinogenic and mutagenic heavy metal. Its level in drinking water is regulated worldwide to protect public health. This study presents a novel chemical method to modify the polyacrylonitrile (PAN) nanofibers for efficient Cr(VI) removal from water. The PAN nanofibers with an average diameter of 165 nm are produced using the electrospinning technique. Through a 2-step chemical modification process, the amidine polyacrylonitrile (APAN) nanofibers are synthesized by the conversion of nitrile groups [-C=N] in PAN nanofibers into amidines [-C(N═NH)(NH2)]. The attenuated total reflectance Fourier transform (ATR-FTIR) spectroscopy revealed the successful conversion of nitrile groups into amidoximes, resulting in amidoximated polyacrylonitrile nanofibers, and subsequent conversion into amidine functional groups, forming the APAN nanofibers. Greater concentration of hydroxylamine hydrochloride, increased reaction time and temperature yielded higher conversion of nitrile groups into amidoximes to a maximum of 37%. The Cr(VI) uptake by APAN nanofibers was found as a multilayer adsorption process modeled by Freundlich isotherm. The maximum Langmuir Cr(VI) adsorption capacity for APAN nanofibers was found as 225 mg g−1 at pH = 3.0 after 4.0 h exposure duration. The regeneration study revealed the excellent reusability of APAN nanofibers after five adsorption/desorption cycles.",

keywords = "hexavalent Chromium Cr(VI), nanofibers, polyacrylonitrile (PAN), wastewater treatment, water",

author = "Donya Sharafoddinzadeh and Maryam Salehi and Santa Jansone-Popova and Amali Herath and Linkon Bhattacharjee",

note = "Publisher Copyright: {\textcopyright} 2022 Wiley Periodicals LLC.",

year = "2022",

month = may,

day = "20",

doi = "10.1002/app.52169",

language = "English",

volume = "139",

journal = "Journal of Applied Polymer Science",

issn = "0021-8995",

publisher = "wiley",

number = "20",

}

TY - JOUR

T1 - Advance modification of polyacrylonitrile nanofibers for enhanced removal of hexavalent chromium from water

AU - Sharafoddinzadeh, Donya

AU - Salehi, Maryam

AU - Jansone-Popova, Santa

AU - Herath, Amali

AU - Bhattacharjee, Linkon

PY - 2022/5/20

Y1 - 2022/5/20

N2 - Hexavalent chromium [Cr(VI)] is a known carcinogenic and mutagenic heavy metal. Its level in drinking water is regulated worldwide to protect public health. This study presents a novel chemical method to modify the polyacrylonitrile (PAN) nanofibers for efficient Cr(VI) removal from water. The PAN nanofibers with an average diameter of 165 nm are produced using the electrospinning technique. Through a 2-step chemical modification process, the amidine polyacrylonitrile (APAN) nanofibers are synthesized by the conversion of nitrile groups [-C=N] in PAN nanofibers into amidines [-C(N═NH)(NH2)]. The attenuated total reflectance Fourier transform (ATR-FTIR) spectroscopy revealed the successful conversion of nitrile groups into amidoximes, resulting in amidoximated polyacrylonitrile nanofibers, and subsequent conversion into amidine functional groups, forming the APAN nanofibers. Greater concentration of hydroxylamine hydrochloride, increased reaction time and temperature yielded higher conversion of nitrile groups into amidoximes to a maximum of 37%. The Cr(VI) uptake by APAN nanofibers was found as a multilayer adsorption process modeled by Freundlich isotherm. The maximum Langmuir Cr(VI) adsorption capacity for APAN nanofibers was found as 225 mg g−1 at pH = 3.0 after 4.0 h exposure duration. The regeneration study revealed the excellent reusability of APAN nanofibers after five adsorption/desorption cycles.

AB - Hexavalent chromium [Cr(VI)] is a known carcinogenic and mutagenic heavy metal. Its level in drinking water is regulated worldwide to protect public health. This study presents a novel chemical method to modify the polyacrylonitrile (PAN) nanofibers for efficient Cr(VI) removal from water. The PAN nanofibers with an average diameter of 165 nm are produced using the electrospinning technique. Through a 2-step chemical modification process, the amidine polyacrylonitrile (APAN) nanofibers are synthesized by the conversion of nitrile groups [-C=N] in PAN nanofibers into amidines [-C(N═NH)(NH2)]. The attenuated total reflectance Fourier transform (ATR-FTIR) spectroscopy revealed the successful conversion of nitrile groups into amidoximes, resulting in amidoximated polyacrylonitrile nanofibers, and subsequent conversion into amidine functional groups, forming the APAN nanofibers. Greater concentration of hydroxylamine hydrochloride, increased reaction time and temperature yielded higher conversion of nitrile groups into amidoximes to a maximum of 37%. The Cr(VI) uptake by APAN nanofibers was found as a multilayer adsorption process modeled by Freundlich isotherm. The maximum Langmuir Cr(VI) adsorption capacity for APAN nanofibers was found as 225 mg g−1 at pH = 3.0 after 4.0 h exposure duration. The regeneration study revealed the excellent reusability of APAN nanofibers after five adsorption/desorption cycles.

KW - hexavalent Chromium Cr(VI)

KW - nanofibers

KW - polyacrylonitrile (PAN)

KW - wastewater treatment

KW - water

UR - http://www.scopus.com/inward/record.url?scp=85123602671&partnerID=8YFLogxK

U2 - 10.1002/app.52169

DO - 10.1002/app.52169

M3 - Article

AN - SCOPUS:85123602671

SN - 0021-8995

VL - 139

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

IS - 20

M1 - 52169

ER -

Advance modification of polyacrylonitrile nanofibers for enhanced removal of hexavalent chromium from water

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this