Competitive Adsorption of Cd(II), Cr(VI), and Pb(II) onto Nanomaghemite: A Spectroscopic and Modeling Approach

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F15%3A68310" target="_blank" >RIV/60460709:41330/15:68310 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/acs.est.5b03063" target="_blank" >http://dx.doi.org/10.1021/acs.est.5b03063</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.est.5b03063" target="_blank" >10.1021/acs.est.5b03063</a>

Result language
angličtina
Original language name
Competitive Adsorption of Cd(II), Cr(VI), and Pb(II) onto Nanomaghemite: A Spectroscopic and Modeling Approach
Original language description
A combined modeling and spectroscopic approach is used to describe Cd(II), Cr(VI), and Pb(II) adsorption onto nanomaghemite and nanomaghemite coated quartz. A pseudo-second order kinetic model ?tted the adsorption data well. The sorption capacity of nanomaghemite was evaluated using a Langmuir isotherm model, and a di?use double layer surface complexation model (DLM) was developed to describe metal adsorption. Adsorption mechanisms were assessed using X-ray photo- electron spectroscopy and X-ray absorption spectroscopy. Pb(II) adsorption occurs mainly via formation of inner-sphere complexes, whereas Cr(VI) likely adsorbs mainly as outer-sphere complexes and Cd(II) as a mixture of inner- and outer-sphere complexes. The simple DLM describes well the pH-dependence of single adsorption edges. However, it fails to adequately capture metal adsorption behavior over broad ranges of ionic strength or metal-loading on the sorbents. For systems with equimolar concentrations of Pb(II), Cd(II), and
Czech name
—
Czech description
—

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DK - Contamination and decontamination of soil including pesticides
OECD FORD branch
—

Project
<a href="/en/project/GA15-07117S" target="_blank" >GA15-07117S: Modeling the competitive adsorption of metals and As onto Fe nano-oxides: Implication for soil remediation</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)