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Title: Adsorption study of selenium ions from aqueous solutions using MgO nanosheets synthesized by ultrasonic method

Abstract

tMgO nanosheets with thickness ranges of 3–10 molecule layers and high specific area (166.44 m2g-1)were successfully fabricated by an ultrasound-assisted exfoliation method and used as adsorbent forthe removal of both selenite (Se(IV)) and selenate (Se(VI)) from aqueous solutions. The resulting MgOnanosheets displayed high maximum adsorption capacities of 103.52 and 10.28 mg g-1for Se(IV) andSe(VI), respectively. ATR-FTIR and XPS spectroscopic results suggested that both Se(IV) and Se(VI) formedinner-sphere surface complexes on MgO nanosheets under the present experimental conditions. Fur-thermore, high adsorption capacity for Se(IV/VI) in the presence of coexistent anions (SO 4 2-, PO43-, Cl-,and F-) and efficient regeneratability of adsorbent by NaOH solution were observed in the competitiveadsorption and regeneration steps. The simple one-step synthesis process of MgO nanosheets and highadsorption capacities offer a promising method for Se(IV/VI) removal in water treatment.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1417433
Report Number(s):
PNNL-SA-128498
Journal ID: ISSN 0304-3894; 49672; KP1704020
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Hazardous Materials; Journal Volume: 341; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; Environmental Molecular Sciences Laboratory

Citation Formats

Cui, Wenwen, Li, Ping, Wang, Zheming, Zheng, Shili, and Zhang, Yi. Adsorption study of selenium ions from aqueous solutions using MgO nanosheets synthesized by ultrasonic method. United States: N. p., 2018. Web. doi:10.1016/j.jhazmat.2017.07.073.
Cui, Wenwen, Li, Ping, Wang, Zheming, Zheng, Shili, & Zhang, Yi. Adsorption study of selenium ions from aqueous solutions using MgO nanosheets synthesized by ultrasonic method. United States. doi:10.1016/j.jhazmat.2017.07.073.
Cui, Wenwen, Li, Ping, Wang, Zheming, Zheng, Shili, and Zhang, Yi. Mon . "Adsorption study of selenium ions from aqueous solutions using MgO nanosheets synthesized by ultrasonic method". United States. doi:10.1016/j.jhazmat.2017.07.073.
@article{osti_1417433,
title = {Adsorption study of selenium ions from aqueous solutions using MgO nanosheets synthesized by ultrasonic method},
author = {Cui, Wenwen and Li, Ping and Wang, Zheming and Zheng, Shili and Zhang, Yi},
abstractNote = {tMgO nanosheets with thickness ranges of 3–10 molecule layers and high specific area (166.44 m2g-1)were successfully fabricated by an ultrasound-assisted exfoliation method and used as adsorbent forthe removal of both selenite (Se(IV)) and selenate (Se(VI)) from aqueous solutions. The resulting MgOnanosheets displayed high maximum adsorption capacities of 103.52 and 10.28 mg g-1for Se(IV) andSe(VI), respectively. ATR-FTIR and XPS spectroscopic results suggested that both Se(IV) and Se(VI) formedinner-sphere surface complexes on MgO nanosheets under the present experimental conditions. Fur-thermore, high adsorption capacity for Se(IV/VI) in the presence of coexistent anions (SO42-, PO43-, Cl-,and F-) and efficient regeneratability of adsorbent by NaOH solution were observed in the competitiveadsorption and regeneration steps. The simple one-step synthesis process of MgO nanosheets and highadsorption capacities offer a promising method for Se(IV/VI) removal in water treatment.},
doi = {10.1016/j.jhazmat.2017.07.073},
journal = {Journal of Hazardous Materials},
number = C,
volume = 341,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2018},
month = {Mon Jan 01 00:00:00 EST 2018}
}