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פותח על ידי קלירמאש פתרונות בע"מ -
Effect of Organic Matter on Sorption of Zn on Soil: Elucidation by Wien Effect Measurements and EXAFS Spectroscopy
Year:
2016
Authors :
פרידמן, שמואל
;
.
Volume :
50
Co-Authors:
Fan, T.-T., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China, University of Chinese Academy of Sciences, Beijing, China
Wang, Y.-J., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
Li, C.-B., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
He, J.-Z., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China, University of Chinese Academy of Sciences, Beijing, China
Gao, J., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
Zhou, D.-M., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
Friedman, S.P., Institute of Soil, Water, and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Sparks, D.L., Environmental Soil Chemistry Group, Delaware Environmental Institute, Dept of Plant and Soil Sciences, University of Delaware, Newark, DE, United States
Facilitators :
From page:
2931
To page:
2937
(
Total pages:
7
)
Abstract:
Soil organic matter (SOM) is the major factor affecting sequestration of heavy metals in soil. The mean free binding energy and the mean free adsorption energy and speciation of Zn in soil, as affected by SOM, were determined by employing Wien effect measurements. The presence of SOM markedly decreased the Zn binding energy in soils in the following order: Top (5.86 kJ mol-1) < Bottom (8.66 kJ mol-1) < Top OM-free (9.44 kJ mol-1) ≈ Bottom OM-free (9.50 kJ mol-1). The SOM also significantly decreased the adsorption energy of Zn on black soil particles by reducing nonspecific adsorption of Zn on their surfaces. The speciation of Zn in soils was elucidated by extended X-ray absorption fine structure spectroscopy and microfocus X-ray fluorescence. The results obtained by linear combination fitting of EXAFS spectra revealed that the main forms of Zn in soil were outer-sphere Zn, Zn-illite, Zn-kaolinite, and HA-Zn. As the SOM content increased, the proportion of HA-Zn among the total immobilized Zn increased, and the proportion of nonspecific adsorbed Zn decreased. The present results implied that SOM is an important controlling factor for the environmental behavior of Zn in soils. © 2016 American Chemical Society.
Note:
Related Files :
Adsorption
Biological materials
Heavy metals
soil
soil pollution
soil surveys
Zinc
zinc kaolinite
עוד תגיות
תוכן קשור
More details
DOI :
10.1021/acs.est.5b05281
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
27951
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:35
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Scientific Publication
Effect of Organic Matter on Sorption of Zn on Soil: Elucidation by Wien Effect Measurements and EXAFS Spectroscopy
50
Fan, T.-T., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China, University of Chinese Academy of Sciences, Beijing, China
Wang, Y.-J., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
Li, C.-B., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
He, J.-Z., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China, University of Chinese Academy of Sciences, Beijing, China
Gao, J., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
Zhou, D.-M., Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
Friedman, S.P., Institute of Soil, Water, and Environmental Sciences, Agricultural Research Organization, Volcani Center, Bet Dagan, Israel
Sparks, D.L., Environmental Soil Chemistry Group, Delaware Environmental Institute, Dept of Plant and Soil Sciences, University of Delaware, Newark, DE, United States
Effect of Organic Matter on Sorption of Zn on Soil: Elucidation by Wien Effect Measurements and EXAFS Spectroscopy
Soil organic matter (SOM) is the major factor affecting sequestration of heavy metals in soil. The mean free binding energy and the mean free adsorption energy and speciation of Zn in soil, as affected by SOM, were determined by employing Wien effect measurements. The presence of SOM markedly decreased the Zn binding energy in soils in the following order: Top (5.86 kJ mol-1) < Bottom (8.66 kJ mol-1) < Top OM-free (9.44 kJ mol-1) ≈ Bottom OM-free (9.50 kJ mol-1). The SOM also significantly decreased the adsorption energy of Zn on black soil particles by reducing nonspecific adsorption of Zn on their surfaces. The speciation of Zn in soils was elucidated by extended X-ray absorption fine structure spectroscopy and microfocus X-ray fluorescence. The results obtained by linear combination fitting of EXAFS spectra revealed that the main forms of Zn in soil were outer-sphere Zn, Zn-illite, Zn-kaolinite, and HA-Zn. As the SOM content increased, the proportion of HA-Zn among the total immobilized Zn increased, and the proportion of nonspecific adsorbed Zn decreased. The present results implied that SOM is an important controlling factor for the environmental behavior of Zn in soils. © 2016 American Chemical Society.
Scientific Publication
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