Sökning: onr:"swepub:oai:DiVA.org:kth-186957" >
Phosphate effects o...
Phosphate effects on cadmium(II) sorption to ferrihydrite
-
- Tiberg, Charlotta (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för mark och miljö,Department of Soil and Environment
-
- Gustafsson, Jon Petter (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,KTH,Hållbar utveckling, miljövetenskap och teknik,Swedish University of Agricultural Sciences (SLU), Sweden,Institutionen för mark och miljö,Department of Soil and Environment,Royal Institute of Technology (KTH)
-
(creator_code:org_t)
-
- Academic Press Inc. 2016
- 2016
- Engelska.
-
Ingår i: Journal of Colloid and Interface Science. - : Academic Press Inc.. - 0021-9797 .- 1095-7103. ; 471, s. 103-111
- Relaterad länk:
-
https://kth.diva-por... (primary) (Raw object)
-
visa fler...
-
http://manuscript.el...
-
https://pub.epsilon.... (primary) (Raw object) (free)
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://res.slu.se/i...
-
visa färre...
Abstract
Ämnesord
Stäng
- Hypothesis: Phosphate influences the sorption of metals to iron (hydr)oxides. An enhanced formation of inner-sphere complexes on the (hydr)oxide surface can be attributed to electrostatic interactions and/or to changes in metal coordination on the iron (hydr)oxide surface. Phosphate was expected to increase cadmium(II) sorption on ferrihydrite. It should be possible to identify changes in cadmium(II) coordination upon phosphate addition by Extended X-ray absorption fine structure (EXAFS) spectroscopy and implement the identified complexes in a surface complexation model (SCM). Experiments: The effect of phosphate addition on cadmium(II) sorption to ferrihydrite was studied by a series of batch experiments covering the pH range from 4 to 8. EXAFS spectroscopy was performed on ferrihydrite from the batch experiments at the cadmium K edge. The identified surface complexes were incorporated in the Charge distribution multisite complexation (CD-MUSIC) model, and new surface complexation constants were optimized. Findings: Without phosphate addition cadmium(II) formed inner-sphere bidentate complexes on the ferrihydrite surface. With phosphate there was an increased cadmium(II) sorption that could not be explained by electrostatic interactions alone. The enhancement was best explained by the formation of a ternary complex including cadmium(II), phosphate and ferrihydrite surface groups.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Nyckelord
- Adsorption
- Cadmium (Cd)
- Charge distribution multisite complexation (CD-MUSIC)
- Extended X-ray absorption spectroscopy (EXAFS)
- Iron hydroxide
- Iron oxide
- Phosphate
- Surface complex
- Cadmium
- Charge distribution
- Coordination reactions
- Electrostatics
- Extended X ray absorption fine structure spectroscopy
- Hydraulic servomechanisms
- Iron
- Iron oxides
- Phosphates
- Sorption
- X ray absorption spectroscopy
- Cadmiums (Cd)
- Extended x-ray absorption spectroscopies
- Iron hydroxides
- Multi-site
- Iron compounds
- Land and Water Resources Engineering
- Mark- och vattenteknik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas