Use of wetlands is becoming a common practice for treating wastewater. These soils contain high amounts organic matter and are effective in removing different contaminants.  Humic compounds are the most recalcitrant fraction of organic matter and play major role in regulating transport and retention of contaminants especially hydrophobic organic contaminants. Understanding of their chemical structure largely helps in understanding of their reaction with different contaminants. In the present study three wetland soils of Louisiana coast were collected and soil organic matter was fractionated. Purified humic fractions were characterized by using different spectroscopy techniques. The results will be presented.