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A Review of Dissolved Organic Matter Transport Processes Affecting Soil and Environmental Quality | OMICS International | Abstract
ISSN: 2161-0525

Journal of Environmental & Analytical Toxicology
Open Access

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Research Article

A Review of Dissolved Organic Matter Transport Processes Affecting Soil and Environmental Quality

S. K. Deb and M. K. Shukla*
Department of Plant and Environmental Sciences, New Mexico State University, MSC 3Q, P.O. Box 30003, Las Cruces, NM 88003
Corresponding Author : Manoj K Shukla
Department of plant and Environmental Sciences
New Mexico State University, MSC 3Q, P.O. Box 30003
Las Cruces, NM 88003
Tel: 575-646-2324
Fax: 575-646-6041
E-mail: [email protected]
Received October 11, 2011; Accepted November 07, 2011; Published November 09, 2011
Citation: Deb SK, Shukla MK (2011) A Review of Dissolved Organic Matter Transport Processes Affecting Soil and Environmental Quality. J Environment Analytic Toxicol 1:106. doi: 10.4172/2161-0525.1000106
Copyright: © 2011 Deb SK, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Dissolved organic matter (DOM) affects several processes in soil and water including nutrient cycling, soil and water pollution and CO2 flux between the soil and atmosphere. The aim of this review is to collate and synthesize the literature on the transport processes of DOM in soil. The DOM normally comprises of only a small fraction of soil organic matter (SOM) and originates mainly from the decomposition and solubilization of SOM, which is accumulated on soil surface or soil profile from plant residues and additions of organic amendments such as animal and poultry manures and other biosolids. The DOM is one of the most reactive and mobile SOM fractions and has a major influence on biogeochemical processes in both terrestrial and aquatic environments. Terrestrially borne DOM is subjected to microbial decomposition, photodegradation and adsorption on soil mineral surfaces. It is sorbed on mineral surfaces and high adsorption capacities of clay minerals and oxides for DOM sorption are demonstrated in laboratory studies. However, these high sorption values are not reproduced in limited field studies. Similarly, a few data available on the transport of DOM through macropores also demonstrate the limited control of sorption on DOM retention in soil profile. Thus, there is a need to further investigate the physical and chemical protection mechanisms, as well as the biodegradability of DOM shown in laboratory studies. There is an increasing need to clearly understand the formation, fate and transport of DOM at field scales. The environmental factors such as precipitation and temperature, land use change, land management, and biological factors have profound and discrete influences on DOM dynamics in soil profile. Future research efforts must focus on the assessment of the influences of these factors by conducting field studies in different climatic zones, soils, and land use and management systems.


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