The chemical composition of high molecular weight dissolved organic matter (DOM) and particulate organic matter (POM) was examined along the salinity gradient of the Delaware Estuary. DOM was collected and fractionated by tangential-flow ultrafiltration into 1–30 kDa (HDOM; high molecular weight) and 30 kDa to 0.2 mm (VHDOM; very high molecular weight) and compared to particles collected in par...

Polycyclic aromatic hydrocarbons (PAHS) have been determined in the atmosphere of Isfahan, Iran. Airborne particulate matter was sampled using a high-volume air sampler at roof-top level (~6m). Extraction of PAHS from airborne particulate matter has been performed using SFE system and the relationship between the extraction temperature and the recovery of PAHS</su...

Developing spectral models of soil properties is an important frontier in remote sensing and soil science. Several studies have focused on modeling soil properties such as total pools of soil organic matter and carbon in bare soils. We extended this effort to model soil parameters in areas densely covered with coastal vegetation. Moreover, we investigated soil properties indicative of soil func...

The flat pampas in the state of Santa Fe in Argentina have soils with high silt content, variable carbon content, and diverse degrees of structural degradation. Aggregate stability has been used as an indicator of the structural condition of the soil. This study aimed to quantify the effect of the addition of crop residues and root activity on the agents of aggregation and mechanisms of aggrega...

*Correspondence: Balwant Singh, Department of Environmental Sciences, Faculty of Agriculture and Environment, The University of Sydney, 1 Central Ave., Australian Technology Park, Eveleigh, NSW 2015, Australia e-mail: balwant.singh@ sydney.edu.au Organo-mineral interactions are important for the cycling and preservation of organic carbon (OC) in soils. To understand the role of soil mineral sur...

This study concerns the kinetics of bacterial degradation of two fractions (molecular mass) of dissolved organic matter (DOM) released by Microcystis aeruginosa. Barra Bonita Reservoir (SP, Brazil) conditions were simulated in the laboratory using the associated local bacterial community. The extent of degradation was quantified as the amount of organic carbon transferred from each DOM fraction...

Particulate organic matter fractions (POM), defined as sand-sized organic separates in soils, are known to be labile organic components with a rapid turnover. Recently, POM fractions were identified to be metalenriched in both metal-contaminated and uncontaminated soils. However, mechanisms for such metalenrichment are poorly understood, because of the paucity of information on the chemical pro...

Clay–organic complexes (COC) impart chemical and physical protection to soil carbon (C). In the present study, aim was assess long-term effects of different organic amendments on C stability in COC, distribution aggregates, concentration aggregates labile fractions inceptisols located at research farm situated semi-arid sub-tropical climate India. The results showed that percentage large macroa...

Naturally-occurring organic material (NOM) in dissolved, colloidal and particulate forms is ubiquitous in surface and ground waters. NOM is a heterogeneous mixture of complex organic materials including humic substances, hydrophilic acids, proteins, lipids, carboxylic acids, polysaccharides, amino acids, and hydrocarbons [1]. The dissolved and colloidal forms (i.e., DOM) are the most problemati...

The agroforestry systems with a high potential for C sequestration are those degraded by poor management strategies. Studies on changes in soil status these ecosystems mostly take into account labile pools. Labile and stable organic matter (SOM) fractions affected land-use changes. Stable pools essential to understanding effects of storage the long term. SOM stability is partly enhanced interac...