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Titolo:
Impact of dissolved organic matter on the desorption and mineralization rates of naphthalene
Autore:
Plaehn, WA; Zhao, XD; Dale, BE; Voice, TC;
Indirizzi:
Parsons Engn Sci Inc, Denver, CO 80290 USA Parsons Engn Sci Inc Denver COUSA 80290 gn Sci Inc, Denver, CO 80290 USA Michigan State Univ, Dept Civil & Environm Engn, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 Engn, E Lansing, MI 48824 USA Michigan State Univ, Dept Chem Engn, E Lansing, MI 48824 USA Michigan State Univ E Lansing MI USA 48824 Engn, E Lansing, MI 48824 USA
Titolo Testata:
JOURNAL OF SOIL CONTAMINATION
fascicolo: 4, volume: 8, anno: 1999,
pagine: 491 - 507
SICI:
1058-8337(1999)8:4<491:IODOMO>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYCYCLIC AROMATIC-HYDROCARBONS; CHEMICALS; SORPTION; BINDING; SOIL;
Keywords:
desorption; biodegradation; soil; humics; phytoremediation; landfarming; bioavailability;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Plaehn, WA Parsons Engn Sci Inc, Denver, CO 80290 USA Parsons Engn Sci Inc Denver CO USA 80290 Denver, CO 80290 USA
Citazione:
W.A. Plaehn et al., "Impact of dissolved organic matter on the desorption and mineralization rates of naphthalene", J SOIL CONT, 8(4), 1999, pp. 491-507

Abstract

The persistence of organic contaminants in plant-soil systems will be largely determined by the basic processes controlling bioavailability: desorption and biodegradation. Both processes can be affected by the presence of and variations in dissolved organic matter (DOM). To evaluate potential effects of DOM in surface soil remediation systems the kinetics of naphthalene desorption from soil and mineralization in soil solution in the presence of DOM were studied in completely mixed batch reactors (CMBRs). Three different DOM solutions were studied. These were obtained from water extraction of two different soils (muck-highly organic and alfalfa field-agricultural) and a third prepared by reconstituting a fulvic acid reference standard purchased commercially. Neither the desorption rate nor equilibrium partitioningof naphthalene was affected by the presence of varying DOM solutions. The effect on mineralization was evaluated based on an evaluation of a first-order rate constant produced by nonlinear regression of data fitted to a (CO2)-C-14 production model. For the muck DOM solution, alfalfa DOM solution, and fulvic acid DOM solution, first-order rate constants were 0.0474, 0.06570.0422 min(-1), respectively. Using uncertainty analysis, these differences were found not to be significant at a 90% confidence level. Although not apparent in this data, the impact of DOM on the mechanisms of desorption and biodegradation in a plant-soil environment may be important for other contaminant/organism/soil combinations. With the increased interest in phytoremediation and land farming as means of treating organic contaminants, further investigation of such interactions may be warranted.

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Documento generato il 18/01/20 alle ore 08:16:36