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Title: Adsorptive recovery of neodymium and dysprosium in phosphorous functionalized nanoporous carbon

Abstract

Phosphorus functionalized nanoporous carbon was synthesized from lignin by periodical reactions with potassium hydroxide and triphenylphosphine. It has the BET surface area of 837 m2/g and total pore volume 0.41 cm3/g along with 0.9 atom% phosphorus. The adsorption of neodymium (Nd (III)) and dysprosium (Dy(III)) were in the range of 335–344 mg/g upto their initial concentration of 500 ppm in water and such adsorption amount is higher than that of majority of the adsorbents reported in literature. The adsorption capacity showed negligible dependency on the solution pH. The distribution coefficients for Nd(III) and Dy(III) were within 1000 to 10,000 mL/g. The adsorption capacity of iron (Fe(III)) under the similar conditions was one order of magnitude lower and it suggests a possible separation of these rare earth elements from iron. The maximum selectivity of separation of Nd(III) and Dy(III) from iron was ca. 32 to 61. Kinetic study revealed that the adsorption of Dy was faster than that of Nd(III). The results of kinetic study were better fit with pseudosecond order kinetics. XPS studies on both Nd(III) and Dy(III)-adsorbed carbons revealed a small shift in the P 2p3/2 energy level of phosphorus towards higher energy level hereby suggesting a possible formationmore » of metallic phosphates. Additionally, Similar studies on Nd(III) and Dy(III)-adsorbed carbon indicated small amounts carbonates and oxides of rare earth elements that might have also been formed. The overall results suggest that this carbon can be used as a potential sorbent for enrichment and separation of Nd(III) and Dy(III).« less

Authors:
 [1];  [1];  [2]; ORCiD logo [3]; ORCiD logo [3]
  1. Widener University, Pennsylvania
  2. Rutgers University, Piscataway, New Jersey
  3. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1607273
Alternate Identifier(s):
OSTI ID: 1550003
Grant/Contract Number:  
[AC05-00OR22725; CNMS2016-302]
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Environmental Chemical Engineering
Additional Journal Information:
[ Journal Volume: 5; Journal Issue: 5]
Country of Publication:
United States
Language:
English

Citation Formats

Saha, Dipendu, Akkoyunlu, Sel Didem, Thorpe, Ryan, Hensley, Dale K., and Chen, Jihua. Adsorptive recovery of neodymium and dysprosium in phosphorous functionalized nanoporous carbon. United States: N. p., 2017. Web. doi:10.1016/j.jece.2017.09.009.
Saha, Dipendu, Akkoyunlu, Sel Didem, Thorpe, Ryan, Hensley, Dale K., & Chen, Jihua. Adsorptive recovery of neodymium and dysprosium in phosphorous functionalized nanoporous carbon. United States. doi:10.1016/j.jece.2017.09.009.
Saha, Dipendu, Akkoyunlu, Sel Didem, Thorpe, Ryan, Hensley, Dale K., and Chen, Jihua. Sun . "Adsorptive recovery of neodymium and dysprosium in phosphorous functionalized nanoporous carbon". United States. doi:10.1016/j.jece.2017.09.009. https://www.osti.gov/servlets/purl/1607273.
@article{osti_1607273,
title = {Adsorptive recovery of neodymium and dysprosium in phosphorous functionalized nanoporous carbon},
author = {Saha, Dipendu and Akkoyunlu, Sel Didem and Thorpe, Ryan and Hensley, Dale K. and Chen, Jihua},
abstractNote = {Phosphorus functionalized nanoporous carbon was synthesized from lignin by periodical reactions with potassium hydroxide and triphenylphosphine. It has the BET surface area of 837 m2/g and total pore volume 0.41 cm3/g along with 0.9 atom% phosphorus. The adsorption of neodymium (Nd (III)) and dysprosium (Dy(III)) were in the range of 335–344 mg/g upto their initial concentration of 500 ppm in water and such adsorption amount is higher than that of majority of the adsorbents reported in literature. The adsorption capacity showed negligible dependency on the solution pH. The distribution coefficients for Nd(III) and Dy(III) were within 1000 to 10,000 mL/g. The adsorption capacity of iron (Fe(III)) under the similar conditions was one order of magnitude lower and it suggests a possible separation of these rare earth elements from iron. The maximum selectivity of separation of Nd(III) and Dy(III) from iron was ca. 32 to 61. Kinetic study revealed that the adsorption of Dy was faster than that of Nd(III). The results of kinetic study were better fit with pseudosecond order kinetics. XPS studies on both Nd(III) and Dy(III)-adsorbed carbons revealed a small shift in the P 2p3/2 energy level of phosphorus towards higher energy level hereby suggesting a possible formation of metallic phosphates. Additionally, Similar studies on Nd(III) and Dy(III)-adsorbed carbon indicated small amounts carbonates and oxides of rare earth elements that might have also been formed. The overall results suggest that this carbon can be used as a potential sorbent for enrichment and separation of Nd(III) and Dy(III).},
doi = {10.1016/j.jece.2017.09.009},
journal = {Journal of Environmental Chemical Engineering},
number = [5],
volume = [5],
place = {United States},
year = {2017},
month = {10}
}

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