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Title: Iron addition to soil specifically stabilized lignin

Authors:
; ; ;
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23)
OSTI Identifier:
1359867
Grant/Contract Number:
SC0006929
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Soil Biology and Biochemistry
Additional Journal Information:
Journal Volume: 98; Journal Issue: C; Related Information: CHORUS Timestamp: 2017-10-06 09:12:41; Journal ID: ISSN 0038-0717
Publisher:
Elsevier
Country of Publication:
United Kingdom
Language:
English

Citation Formats

Hall, Steven J., Silver, Whendee L., Timokhin, Vitaliy I., and Hammel, Kenneth E.. Iron addition to soil specifically stabilized lignin. United Kingdom: N. p., 2016. Web. doi:10.1016/j.soilbio.2016.04.010.
Hall, Steven J., Silver, Whendee L., Timokhin, Vitaliy I., & Hammel, Kenneth E.. Iron addition to soil specifically stabilized lignin. United Kingdom. doi:10.1016/j.soilbio.2016.04.010.
Hall, Steven J., Silver, Whendee L., Timokhin, Vitaliy I., and Hammel, Kenneth E.. 2016. "Iron addition to soil specifically stabilized lignin". United Kingdom. doi:10.1016/j.soilbio.2016.04.010.
@article{osti_1359867,
title = {Iron addition to soil specifically stabilized lignin},
author = {Hall, Steven J. and Silver, Whendee L. and Timokhin, Vitaliy I. and Hammel, Kenneth E.},
abstractNote = {},
doi = {10.1016/j.soilbio.2016.04.010},
journal = {Soil Biology and Biochemistry},
number = C,
volume = 98,
place = {United Kingdom},
year = 2016,
month = 7
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1016/j.soilbio.2016.04.010

Citation Metrics:
Cited by: 1work
Citation information provided by
Web of Science

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  • Light rare-earth metals are not assumed to form compounds of the CaCu/sub 5/-type structure with iron. When zirconium was not added, the Th/sub 2/Zn/sub 17/-type rhombohedral structure existed in the samples of nominal composition SmFe/sub 5/ and SmFe/sub 7/. Samples of nominal composition (Sm/sub 1-//sub x/Zr/sub x/)Fe/sub 5/ and (Sm/sub 0.65/Zr/sub 0.35/)Fe/sub y/ were studied by x-ray diffraction and thermomagnetic analyses. Thermomagnetic analyses showed the existence of a new phase besides Sm/sub 2/Fe/sub 17/. X-ray diffraction analyses showed the new phase has a CaCu/sub 5/-type structure. Lattice parameters and Curie temperatures of these samples were measured.
  • Zero valent iron (ZVI) nanoparticles have been studied extensively for degradation of chlorinated solvents in the aqueous phase, and have been tested for in-situ remediation of contaminated soil and groundwater. However, little is known about its effectiveness for degrading soil-sorbed contaminants. This work studied reductive dechlorination of trichloroethylene (TCE) sorbed in two model soils (a potting soil and Smith Farm soil) using carboxymethyl cellulose (CMC) stabilized Fe-Pd bimetallic nanoparticles. Effects of sorption, surfactants and dissolved organic matter (DOC) were determined through batch kinetic experiments. While the nanoparticles can effectively degrade soil-sorbed TCE, the TCE degradation rate was strongly limited bymore » desorption kinetics, especially for the potting soil which has a higher organic matter content of 8.2%. Under otherwise identical conditions, {approx}44% of TCE sorbed in the potting soil was degraded in 30 h, compared to {approx}82% for Smith Farm soil (organic matter content = 0.7%). DOC from the potting soil was found to inhibit TCE degradation. The presence of the extracted SOM at 40 ppm and 350 ppm as TOC reduced the degradation rate by 34% and 67%, respectively. Four prototype surfactants were tested for their effects on TCE desorption and degradation rates, including two anionic surfactants known as SDS (sodium dodecyl sulfate) and SDBS (sodium dodecyl benzene sulfonate), a cationic surfactant hexadecyltrimethylammonium (HDTMA) bromide, and a non-ionic surfactant Tween 80. All four surfactants were observed to enhance TCE desorption at concentrations below or above the critical micelle concentration (cmc), with the anionic surfactant SDS being most effective. Based on the pseudo-first-order reaction rate law, the presence of 1 x cmc SDS increased the reaction rate by a factor of 2.5 when the nanoparticles were used for degrading TCE in a water solution. SDS was effective for enhancing degradation of TCE sorbed in Smith Farm soil, the presence of SDS at sub-cmc increased TCE degraded by {approx}10%. However, effect of SDS on degradation of TCE in the potting soil was more complex. The presence of SDS at sub-cmc decreased TCE degradation by 5%, but increased degradation by 5% when SDS dosage was raised to 5 x cmc. The opposing effects were attributed to combined effects of SDS on TCE desorption and degradation, release of soil organic matter and nanoparticle aggregation. The findings strongly suggest that effect of soil sorption on the effectiveness of Fe-Pd nanoparticles must be taken into account in process design, and soil organic content plays an important role in the overall degradation rate and in the effectiveness of surfactant uses.« less
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