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Adsorption of As(III) versus As(V) from aqueous solutions by cerium-loaded volcanic rocks

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Abstract
Contamination of drinking water with arsenic causes severe health problems in various world regions. Arsenic exists predominantly as As(III) and As(V) depending on the prevailing redox conditions of the environment. Most of the techniques developed for treating As(V) are not very effective for As(III), which is more toxic and mobile than As(V). In this study, novel cerium-loaded pumice (Ce-Pu) and red scoria (Ce-Rs) adsorbents were developed to remove both As(III) and As(V) ions from water. The Ce-Pu and Ce-Rs adsorbents were characterized using ICP-OES, EDX, and SEM. The experimental equilibrium sorption data fitted well Freundlich and Dubinin-Radushkevich (D-R) isotherms. The adsorption was very fast and reached an equilibrium within 2 h. Both Ce-Rs and Ce-Pu showed high As(III) and As(V) removal efficiency in a wide pH range between 3 and 9, which is an important asset for practical applications. The Ce-Pu and Ce-Rs adsorbents can be recycled and used up to three adsorption cycles without significant loss of their original efficiency. Accordingly, Ce-Pu and Ce-Rs seem to be suitable for removal of arsenic from aqueous systems.
Keywords
Cerium, Arsenic, Adsorption, Red scoria, Pumice, ARSENIC REMOVAL, SORPTION KINETICS, OXIDE ADSORBENT, MODIFIED PUMICE, ALUMINUM-OXIDE, DRINKING-WATER, COATED PUMICE, MIXED-OXIDE, EQUILIBRIUM, CHITOSAN

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Chicago
Asere, Tsegaye Girma, Kim Verbeken, Dejene A Tessema, Fekadu Fufa, Christian Stevens, and Gijs Du Laing. 2017. “Adsorption of As(III) Versus As(V) from Aqueous Solutions by Cerium-loaded Volcanic Rocks.” Environmental Science and Pollution Research 24 (25): 20446–20458.
APA
Asere, T. G., Verbeken, K., Tessema, D. A., Fufa, F., Stevens, C., & Du Laing, G. (2017). Adsorption of As(III) versus As(V) from aqueous solutions by cerium-loaded volcanic rocks. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 24(25), 20446–20458.
Vancouver
1.
Asere TG, Verbeken K, Tessema DA, Fufa F, Stevens C, Du Laing G. Adsorption of As(III) versus As(V) from aqueous solutions by cerium-loaded volcanic rocks. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH. 2017;24(25):20446–58.
MLA
Asere, Tsegaye Girma et al. “Adsorption of As(III) Versus As(V) from Aqueous Solutions by Cerium-loaded Volcanic Rocks.” ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 24.25 (2017): 20446–20458. Print.
@article{8535572,
  abstract     = {Contamination of drinking water with arsenic causes severe health problems in various world regions. Arsenic exists predominantly as As(III) and As(V) depending on the prevailing redox conditions of the environment. Most of the techniques developed for treating As(V) are not very effective for As(III), which is more toxic and mobile than As(V). In this study, novel cerium-loaded pumice (Ce-Pu) and red scoria (Ce-Rs) adsorbents were developed to remove both As(III) and As(V) ions from water. The Ce-Pu and Ce-Rs adsorbents were characterized using ICP-OES, EDX, and SEM. The experimental equilibrium sorption data fitted well Freundlich and Dubinin-Radushkevich (D-R) isotherms. The adsorption was very fast and reached an equilibrium within 2 h. Both Ce-Rs and Ce-Pu showed high As(III) and As(V) removal efficiency in a wide pH range between 3 and 9, which is an important asset for practical applications. The Ce-Pu and Ce-Rs adsorbents can be recycled and used up to three adsorption cycles without significant loss of their original efficiency. Accordingly, Ce-Pu and Ce-Rs seem to be suitable for removal of arsenic from aqueous systems.},
  author       = {Asere, Tsegaye Girma and Verbeken, Kim and Tessema, Dejene A and Fufa, Fekadu and Stevens, Christian and Du Laing, Gijs},
  issn         = {0944-1344},
  journal      = {ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH},
  keywords     = {Cerium,Arsenic,Adsorption,Red scoria,Pumice,ARSENIC REMOVAL,SORPTION KINETICS,OXIDE ADSORBENT,MODIFIED PUMICE,ALUMINUM-OXIDE,DRINKING-WATER,COATED PUMICE,MIXED-OXIDE,EQUILIBRIUM,CHITOSAN},
  language     = {eng},
  number       = {25},
  pages        = {20446--20458},
  title        = {Adsorption of As(III) versus As(V) from aqueous solutions by cerium-loaded volcanic rocks},
  url          = {http://dx.doi.org/10.1007/s11356-017-9692-z},
  volume       = {24},
  year         = {2017},
}

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