Effect of organic amendments on the mobility of trace elements in phytoremediated techno-soils

Role of the humic substances

N. Hattab, M. Soubrand, Regis Guegan, M. Motelica-Heino, X. Bourrat, O. Faure, J. L. Bouchardon

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The efficiency of aided phytostabilization using organic amendments such as ramial chipped wood (RCW) and composted sewage sludge (CSS) was studied on contaminated techno-soils, on nine experimental plots. The objective was to characterize the role of fulvic (FA) and humic acids (HA) on the mobilization of trace elements, specifically As, Cu, Mo, Pb and Zn. Results showed that the addition of CSS increased the total organic carbon and nitrogen content more than with RCW and as a result, the C/N ratio in the CSS soil was higher than in the RCW and non-amended (NE) soil, reflecting the high decomposition of soil organic matter in the CSS soil compared with the other soils. The RCW and CSS amendments increased the hydrogen index (HI) values and the oxygen index (OI) values compared with the NE soil, especially for the soil treated with CSS which contained more aliphatic than aromatic compounds. The addition of CSS to the techno-soil significantly increased the percentage of C org associated with the HA fractions compared with the RCW and NE soils. The soil amended with CSS showed the highest E 4/E 6 ratio and the lowest E 2/E 3 ratio of FA. Zn and As were more abundant in the FA fraction than in the HA fraction, whereas Pb, Cu and Mo were more associated to HA than to FA in the treated and untreated soils, which may explain the difference in their mobility and availability.

Original languageEnglish
Pages (from-to)10470-10480
Number of pages11
JournalEnvironmental Science and Pollution Research
Volume21
Issue number17
DOIs
Publication statusPublished - 2014 Jan 1
Externally publishedYes

Fingerprint

Humic Substances
Trace Elements
Sewage
humic substance
Trace elements
Soil
trace element
Sewage sludge
Soils
soil
humic acid
Wood
effect
sewage sludge
fulvic acid
organic nitrogen
Aromatic compounds
total organic carbon
mobilization
soil organic matter

Keywords

  • Contaminated techno-soil
  • Fulvic acid
  • Humic acid
  • Mobility
  • Trace element

ASJC Scopus subject areas

  • Environmental Chemistry
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Effect of organic amendments on the mobility of trace elements in phytoremediated techno-soils : Role of the humic substances. / Hattab, N.; Soubrand, M.; Guegan, Regis; Motelica-Heino, M.; Bourrat, X.; Faure, O.; Bouchardon, J. L.

In: Environmental Science and Pollution Research, Vol. 21, No. 17, 01.01.2014, p. 10470-10480.

Research output: Contribution to journalArticle

Hattab, N. ; Soubrand, M. ; Guegan, Regis ; Motelica-Heino, M. ; Bourrat, X. ; Faure, O. ; Bouchardon, J. L. / Effect of organic amendments on the mobility of trace elements in phytoremediated techno-soils : Role of the humic substances. In: Environmental Science and Pollution Research. 2014 ; Vol. 21, No. 17. pp. 10470-10480.
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