Chemical and Spectroscopic Characterization of Humic Acids Isolated from Urban Soils

摘要

Urban soils can be defined as all soils influenced extensively by human activities in the urban landscape(1).Thus,soils in urban areas may contain a mixture of natural humic substances and anthropogenic organic particles,such as carbonaceous material like debris,ash,waste of various origin,as well as airborne particles.Compared to their natural counterparts,such soils may show substantially different behaviour towards environmentally hazardous compounds,and altered microbial activity(2).It is well known that organic matter(OM)plays an essential and dominant role in preserving the soil from pollution of agricultural and anthropic origin,therefore in an urban environment OM is of considerable ecological significance.