**6. References**


Effects of Low-Molecular-Weight-Organic-Acids on the

166.

Release Kinetic of Organochlorine Pesticides from Red Soil 533

Lu, H. L., Yan, C. L. and Liu, J. C. (2007), 'Low-molecular-weight organic acids exuded by

Luo, L., Zhang, S., Shan, X.-Q., et al. (2006), 'Oxalate and root exudates enhance the desorption of p,p'-ddt from soils'. *Chemosphere,* Vol. 63, No. 8, pp. 1273-1279. Maness, S. C., Mc Donnell, D. P., Gaido, K. W., et al. (1998), ' Inhibition of androgen

Mikes, O., Cupr, P., Trapp, S., et al. (2009), 'Uptake of polychlorinated biphenyls and

Mo, C.-H., Cai, Q.-Y., Li, H.-Q., et al. (2008), 'Potential of different species for use in removal of ddt from the contaminated soils'. *Chemosphere,* Vol. 73, No. 1, pp. 120-125. Muratova, A., Pozdnyakova, N., Golubev, S., et al. (2009), 'Oxidoreductase activity of

Oburger, E., Kirk, G. J. D., Wenzel, W. W., et al. (2009), 'Interactive effects of organic acids in the rhizosphere'. *Soil Biology and Biochemistry,* Vol. 41, No. 3, pp. 449-457. Romieu, I., Hernarde, A. M., Lazcano, P. E., et al. (2000), 'Breast cancer, lactation history ,and serum organochlorines'. *Am. J. Epidmiol.,* Vol. 152, No. 4, pp. 363-370. Skaates, S. V., Ramaswami, A. and Anderson, L. G. (2005), 'Transport and fate of dieldrin in poplar and willow trees analyzed by spme'. *Chemosphere,* Vol. 61, No. 1, pp. 85-91. Strom, L., Owen, A. G., Godbold, D. L., et al. (2001), 'Organic acid behaviour in a calcareous

Strom, L., Owen, A. G., Godbold, D. L., et al. (2002), 'Organic acid mediated p mobilization

Strom, L., Owen, A. G., Godbold, D. L., et al. (2005), 'Organic acid behaviour in a calcareous

Tor, A., Aydin, M. E. and zcan, S. (2006), 'Ultrasonic solvent extraction of organochlorine pesticides from soil'. *Analytica Chimica Acta,* Vol. 559, No. 2, pp. 173-180. Toyama, T., Furukawa, T., Maeda, N., et al. (2011), 'Accelerated biodegradation of pyrene

Van Hees, P. a. W., Jones, D. L. and Godbold, D. L. (2002), 'Biodegradation of low molecular

Van Hees, P. a. W., Vinogradoff, S. I., Edwards, A. C., et al. (2003), 'Low molecular weight

exudate interactions'. *Water Research,* Vol. 45, No. 4, pp. 1629-1638.

*Environmental Pollution,* Vol. 157, No. 2, pp. 488-496.

*Chemosphere,* Vol. 74, No. 8, pp. 1031-1036.

33, No. 15, pp. 2125-2133.

37, No. 11, pp. 2046-2054.

*Biochemistry,* Vol. 34, No. 9, pp. 1261-1272.

No. 5, pp. 703-710.

mangrove (kandelia candel (l.) druce) roots and their effect on cadmium species change in the rhizosphere'. *Environmental and Experimental Botany* Vol. 61, pp. 159-

receptor-dependent transcriptional activity by ddt isomers and methoxychlor in hepg2 human hepatoma cells'. *Toxicol. Appl. Pharmacol.,* Vol. 151, No. 1, pp. 135-142.

organochlorine pesticides from soil and air into radishes (raphanus sativus)'.

sorghum root exudates in a phenanthrene-contaminated environment'.

soil: Sorption reactions and biodegradation rates'. *Soil Biology and Biochemistry,* Vol.

in the rhizosphere and uptake by maize roots'. *Soil Biology and Biochemistry,* Vol. 34,

soil implications for rhizosphere nutrient cycling'. *Soil Biology and Biochemistry,* Vol.

and benzo[a]pyrene in the phragmites australis rhizosphere by bacteria-root

weight organic acids in coniferous forest podzolic soils'. *Soil Biology and* 

organic acid adsorption in forest soils: Effects on soil solution concentrations and biodegradation rates'. *Soil Biology and Biochemistry,* Vol. 35, No. 8, pp. 1015-1026. White, J. C. and Kottler, B. D. (2002), 'Citrate-mediated increase in the uptake of weathered p,p'-dde residues by plants'. *Environ. Toxic. Chem.,* Vol. 21, pp. 550-556.

organochlorine pesticide (ocp) residues'. *Food and Chemical Toxicology,* Vol. 43, No. 2, pp. 261-269.


Gonzalez, M., Miglioranza, K. S. B., Aizpún, J. E., et al. (2010), 'Assessing pesticide leaching

Guo, T.-R., Zhang, G.-P., Zhou, M.-X., et al. (2007), 'Influence of aluminum and cadmium

Harald, J. G., Gerhard, G. R., Irene, S., et al. (2000), 'Bioaccumulation and occurrence of

Hassett, J. P. and Anderson, M. A. (1982), 'Effect of dissolved organic matter on adsorption

Inoue, H., Kobayashi, T., Nozoye, T., et al. (2009), 'Rice osysl15 is an iron-regulated iron(iii)-

Jones, D. L., Eldhuset, T., De Wit, H. A., et al. (2001), 'Aluminium effects on organic acid

Kobayashi, T., Nakanishi, H. and Nishizawa, N. K. (2010), 'Recent insights into iron

*Academy Series B Physical and Biological Sciences,* Vol. 86, No. 9, pp. 900-13. Kpomblekou-A, K. and Tabatabai, M. A. (2003), 'Effect of low-molecular weight organic

Landrum, P. F., Nihart, S. R., Eadie, B. J., et al. (1984), 'Reverse-phase separation method for

Li, Z., Shang, L., Zhang, L., et al. (1999), 'Control strategies of malaria in henan province, china. Southeast asian'. *J. Trop. Med. Public. Health,,* Vol. 30, p. 240 ~242. Liao, Y. C., Chien, S. W. C., Wang, M. C., et al. (2006), 'Effect of transpiration on pb uptake

Ling, W., Ren, L., Gao, Y., et al. (2009), 'Impact of low-molecular-weight organic acids on the

of natural waters'. *Environ. Sci. Technol.,* Vol. 18, No. 3, pp. 187-192.

*Chemosphere,* Vol. 65, No. 2, pp. 343-351.

41, No. 10, pp. 2187-2195.

zucchini subspecies'. *Chemosphere,* Vol. 73, No. 10, pp. 1602-1607. Isss/Isric/Fao (1998), 'World reference base for soil resources', in, ( Wageningen, Rome). Jones, D. L. (1998), 'Organic acid in the rhizosphere-a critical review'. *Plant Soil,* Vol. 205, pp.

and patagonia)'. *Chemosphere,* Vol. 81, No. 3, pp. 351-358.

2, pp. 261-269.

Heidelberg).

25-44

275-284.

No. 9, pp. 1259-1267.

Vol. 17, No. 4, pp. 505-512.

*Water Research,* Vol. 16, pp. 681-686.

organochlorine pesticide (ocp) residues'. *Food and Chemical Toxicology,* Vol. 43, No.

and desorption in soils with different agricultural activities from argentina (pampa

stresses on mineral nutrition and root exudates in two barley cultivars'. *Pedosphere,*

endocrine-disrupting chemicals (edcs), persistent organic pollutants (pops), and other organic compounds in fish and other organisms including humans', in B. Beek (ed), *The handbook of environmental chemistry*, (Springer-Verlag, Berlin

of hydrophobic organic compounds by river and sewage sludge-borne particles'.

deoxymugineic acid transporter expressed in the roots and is essential for iron uptake in early growth of the seedlings'. *J Biol Chem,* Vol. 284, No. 6, pp. 3470-9. Inui, H., Wakai, T., Gion, K., et al. (2008), 'Differential uptake for dioxin-like compounds by

mineralization in a norway spruce forest soil'. *Soil Biology and Biochemistry,* Vol. 33,

homeostasis and their application in graminaceous crops'. *Proceedings of the Japan* 

acids on phosphorus release and phytoavailabilty of phosphorus in phosphate rocks added to soils'. *Agriculture, Ecosystems & Environment,* Vol. 100, No. 2-3, pp.

determining pollutant binding to aldrich humic acid and dissolved organic carbon

by lettuce and on water soluble low molecular weight organic acids in rhizosphere'.

availability of phenanthrene and pyrene in soil'. *Soil Biology and Biochemistry,* Vol.


**29** 

*France* 

**Fate of Pesticides in Soils: Toward an** 

Véronique Chaplain1, Laure Mamy1, Laure Vieublé-Gonod2,

*1INRA, UR 251 PESSAC, Versailles,* 

*2INRA-AgroParisTech, UMR 1091 EGC, Grignon,* 

**Integrated Approach of Influential Factors** 

Christian Mougin1, Pierre Benoit2, Enrique Barriuso2 and Sylvie Nélieu1

Despite constraining legislation and increasing efficiency of pesticides (with a decrease in the applied amounts), their use still cause a contamination of environment (air, soil and water). To conciliate agricultural and environmental interests, a better understanding of the fate of pesticides is needed, in particular because it will determine the exposure and consequently the impact of pesticides on the target and non-target organisms. This goal requires new efforts of research at different scales (from molecular to field scale). Following application, most of the pesticides reach the soil either after direct application or after foliage wash-off. As a major interface between other environmental compartments, the soil plays a preponderant buffering role in the fate of pesticides. Apart volatilization, the main processes that control the fate of pesticides in soils are retention on soil particles and degradation (biotic and abiotic). These coupled bio-physico-chemical processes can lead to a transitory or permanent accumulation of pesticides in soils or, on the contrary, to their elimination from the environment. They determine the pesticide concentration in the soil solution, and have a large influence on pesticide transfer toward ground or surface waters and on their ecotoxicological impacts on soil organisms as well. The main difficulties in studying and predicting the retention and degradation of pesticides in soils are the diversity of chemical structures and reactivities of pesticides, the high diversity of soils and their heterogeneous composition and structure. In addition, the pedoclimatic conditions, in particular soil temperature and water content, have a strong influence on retention and degradation because of their effect on soil biological, chemical and physical properties. Therefore, the objective of this chapter is to provide an overview of the factors involved in the retention and degradation of pesticides in soils and to discuss and clarify the needs of new integrated approach. In particular, this work will examine (i) the pertinent scales (among elementary constituents, aggregates and mesoscopic scales) for both retention and degradation studies, (ii) the integrative properties that should be considered, such as hydrophobicity of the organo-clay granulometric fraction or soil structure,

The retention of pesticides in soils is mainly due to the adsorption, which is the passage of a solute from an aqueous phase to the surface of a solid adsorbent (Calvet, 1989). The solid

**1. Introduction** 

and (iii) the primordial role of water.

**2. Retention 2.1 Definitions** 

