Chromate Adsorption on Selected Soil Minerals: Surface Complexation Modeling Coupled with Spectroscopic Investigation.
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F16%3A00467188" target="_blank" >RIV/67985858:_____/16:00467188 - isvavai.cz</a>
Alternative codes found
RIV/60460709:41330/16:70878
Result on the web
<a href="http://dx.doi.org/10.1016/j.jhazmat.2016.07.002" target="_blank" >http://dx.doi.org/10.1016/j.jhazmat.2016.07.002</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jhazmat.2016.07.002" target="_blank" >10.1016/j.jhazmat.2016.07.002</a>
Alternative languages
Result language
angličtina
Original language name
Chromate Adsorption on Selected Soil Minerals: Surface Complexation Modeling Coupled with Spectroscopic Investigation.
Original language description
This study investigates the mechanisms of Cr(VI) adsorption on natural clay (illite and kaolinite) and synthetic (birnessite and ferrihydrite) minerals, including its speciation changes, and combining quantitative thermodynamically based mechanistic surface complexation models (SCMs) with spectroscopic measurements. Series of adsorption experiments have been performed at different pH values (3-10), ionic strengths (0.001-0.1 M KNO3), sorbate concentrations (10(-4), 10(-5), and 10(-6) M Cr(VI)), and sorbate/sorbent ratios (50-500). Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy were used to determine the surface complexes, including surface reactions. Adsorption of Cr(VI) is strongly ionic strength dependent. For ferrihydrite at pH <7, a simple diffuse-layer model provides a reasonable prediction of adsorption. For birnessite, bidentate inner-sphere complexes of chromate and dichromate resulted in a better diffuse-layer model fit. For kaolinite, outer sphere complexation prevails mainly at lower Cr(VI) loadings. Dissolution of solid phases needs to be considered for better SCMs fits. The coupled SCM and spectroscopic approach is thus useful for investigating individual minerals responsible for Cr(VI) retention in soils, and improving the handling and remediation processes.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GJ15-17224Y" target="_blank" >GJ15-17224Y: Mechanisms of Cr(VI) adsorption in soils: Combining the modeling and spectroscopic approach</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Hazardous Materials
ISSN
0304-3894
e-ISSN
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Volume of the periodical
318
Issue of the periodical within the volume
NOV 15
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
433-442
UT code for WoS article
000383003200048
EID of the result in the Scopus database
2-s2.0-84989851069