Entrapped elemental selenium nanoparticles affect physicochemical properties of selenium fed activated sludge

Rohan Jain, Marina Seder-Colomina, Norbert Jordan, Paolo Dessi, Julie Cosmidis, Eric D. van Hullebusch, Stephan Weiss, François Farges, Piet N.L. Lens

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Selenite containing wastewaters can be treated in activated sludge systems, where the total selenium is removed from the wastewater by the formation of elemental selenium nanoparticles, which are trapped in the biomass. No studies have been carried out so far on the characterization of selenium fed activated sludge flocs, which is important for the development of this novel selenium removal process. This study showed that more than 94% of the trapped selenium in activated sludge flocs is in the form of elemental selenium, both as amorphous/monoclinic selenium nanospheres and trigonal selenium nanorods. The entrapment of the elemental selenium nanoparticles in the selenium fed activated sludge flocs leads to faster settling rates, higher hydrophilicity and poorer dewaterability compared to the control activated sludge (i.e., not fed with selenite). The selenium fed activated sludge showed a less negative surface charge density as compared to the control activated sludge. The presence of trapped elemental selenium nanoparticles further affected the spatial distribution of Al and Mg in the activated sludge flocs. This study demonstrated that the formation and subsequent trapping of elemental selenium nanoparticles in the activated sludge flocs affects their physicochemical properties.

Original languageEnglish (US)
Pages (from-to)193-200
Number of pages8
JournalJournal of Hazardous Materials
Volume295
DOIs
StatePublished - Sep 5 2015

Fingerprint

Selenium
physicochemical property
Sewage
selenium
Nanoparticles
activated sludge
Selenious Acid
selenite
Waste Water
nanoparticle
Wastewater
Nanospheres
wastewater
Nanotubes
Hydrophilicity
Surface charge
Charge density
Nanorods
Hydrophobic and Hydrophilic Interactions
Biomass

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Jain, Rohan ; Seder-Colomina, Marina ; Jordan, Norbert ; Dessi, Paolo ; Cosmidis, Julie ; van Hullebusch, Eric D. ; Weiss, Stephan ; Farges, François ; Lens, Piet N.L. / Entrapped elemental selenium nanoparticles affect physicochemical properties of selenium fed activated sludge. In: Journal of Hazardous Materials. 2015 ; Vol. 295. pp. 193-200.
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abstract = "Selenite containing wastewaters can be treated in activated sludge systems, where the total selenium is removed from the wastewater by the formation of elemental selenium nanoparticles, which are trapped in the biomass. No studies have been carried out so far on the characterization of selenium fed activated sludge flocs, which is important for the development of this novel selenium removal process. This study showed that more than 94{\%} of the trapped selenium in activated sludge flocs is in the form of elemental selenium, both as amorphous/monoclinic selenium nanospheres and trigonal selenium nanorods. The entrapment of the elemental selenium nanoparticles in the selenium fed activated sludge flocs leads to faster settling rates, higher hydrophilicity and poorer dewaterability compared to the control activated sludge (i.e., not fed with selenite). The selenium fed activated sludge showed a less negative surface charge density as compared to the control activated sludge. The presence of trapped elemental selenium nanoparticles further affected the spatial distribution of Al and Mg in the activated sludge flocs. This study demonstrated that the formation and subsequent trapping of elemental selenium nanoparticles in the activated sludge flocs affects their physicochemical properties.",
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Jain, R, Seder-Colomina, M, Jordan, N, Dessi, P, Cosmidis, J, van Hullebusch, ED, Weiss, S, Farges, F & Lens, PNL 2015, 'Entrapped elemental selenium nanoparticles affect physicochemical properties of selenium fed activated sludge', Journal of Hazardous Materials, vol. 295, pp. 193-200. https://doi.org/10.1016/j.jhazmat.2015.03.043

Entrapped elemental selenium nanoparticles affect physicochemical properties of selenium fed activated sludge. / Jain, Rohan; Seder-Colomina, Marina; Jordan, Norbert; Dessi, Paolo; Cosmidis, Julie; van Hullebusch, Eric D.; Weiss, Stephan; Farges, François; Lens, Piet N.L.

In: Journal of Hazardous Materials, Vol. 295, 05.09.2015, p. 193-200.

Research output: Contribution to journalArticle

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AU - Jain, Rohan

AU - Seder-Colomina, Marina

AU - Jordan, Norbert

AU - Dessi, Paolo

AU - Cosmidis, Julie

AU - van Hullebusch, Eric D.

AU - Weiss, Stephan

AU - Farges, François

AU - Lens, Piet N.L.

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