Recently heavy metals have received increasing attention as a toxic pollutant in urban areas. Their main anthropogenic sources include industrial activities, building construction, vehicle emissions, coal burning, and waste incineration. In particular, because of the recognition of potential health risks associated with Zn pollution, many researchers have focused great interest on levels and behaviors of this element both in natural and contaminated environments. The understanding of the process responsible for the binding of metal contaminants in soils is important in order to correctly assess the hazard for plant uptake, for water quality and leaching to natural environment. Subsequently, the sorption of heavy metals has been extensively studied. However controversy related to metal sorption mechanisms still remain in the literature. The effect of pH on adsorption of Zn by soil under different cropping systems was investigated in this study. Results showed that differences in metal adsorption depend on the initial heavy metal concentration. At low concentrations, the added metal was adsorbed regardless of the solution pH. At high concentrations, however metal adsorption by soils was strongly related to solution pH; metal adsorption increased with increasing solution pH. A decrease in solution pH with increasing initial metal concentration was observed. The authors used an artificial intelligence method (Fuzzy Logic) to assess the bioavailability ionic zinc based on series of experimental tests. The genetically generated fuzzy knowledge base (GGFKG) was used to prepare the data base for any value of the initial total zinc concentration in soil within the combination of a pH condition. To our knowledge, it is the first application of the GGFKB to cover zinc sorption in large combination of various environmental conditions.
|Publication status||Published - 2005|
|Event||International Workshop on Fate and Impact of Persistent Polluents in the Agroecosystems - Iung, Pulawy, Poland|
Duration: 1 Jan 2005 → …
|Conference||International Workshop on Fate and Impact of Persistent Polluents in the Agroecosystems|
|City||Iung, Pulawy, Poland|
|Period||01/01/2005 → …|