Polycyclic aromatic hydrocarbons (PAHS) are of controversial subjects in the environmental Geochemistry. Soils can be considered as a sink of PAHs, leading to human exposure to these contaminants and consequently the health problems. Due to PAHs absorption/adsorption to the different fractions of soil, and thus the difference in their mobility, determining total PAHs contents of soil may not show the actual risk to enter to the aqueous systems. Hence, identifying PAHs contents in the various fractions of soils using best experimental methods is a critical approach to assess their health effects on humans. What experimental procedures do you suggest for PAHs fractionation in soil samples?! In advance, thanks to all.
Dear Javad,
I have validated the method given below for the task (soil,sediment,water). So, pls. try this metods.
Piyal Aravinna
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.agilent.com/cs/library/applications/5990-8414EN.pdf&ved=2ahUKEwjg3eWQrrjeAhUMSX0KHYzdAJMQFjADegQIBRAB&usg=AOvVaw2Ps2_W5kk93tAq_MRBjczh&cshid=1541252983245
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.agilent.com/cs/library/applications/5990-8414EN.pdf&ved=2ahUKEwjg3eWQrrjeAhUMSX0KHYzdAJMQFjADegQIBRAB&usg=AOvVaw2Ps2_W5kk93tAq_MRBjczh&cshid=1541252983245
ASTM D7363 - 13a
Standard Test Method for Determination of Parent and Alkyl Polycyclic Aromatics in Sediment Pore Water Using Solid-Phase Microextraction and Gas Chromatography/Mass Spectrometry in Selected Ion Monitoring Mode
Dear Dr. @Aravinna
Thanks a lot for your kind consideration of my request. It can be a good analytical method for measuring PAHs concentration in soil. Though I'm seeking the different steps for separating the various soil fractions containing PAHs (e.g. Easily exchangeable and or residuals fractions) using analytical solvents and blanks. Anyway I appreciate you for your help.
Dear Mohammad Javad Navid Nematollahi
I am adding some ideas to achieving your complicated target.
If you add some persistence organic compound compound to the environment, fraction is move to the water table by leaching. this potential and can be estimated using Kd (Soil:water) and you can proved by the laboratory and field experiments. you can incorporation impact of organic matter for the partition using Koc values. Also, you can predicted fraction transported to offsite by erosion and runoff by a calibrated model and can be proved by field experiments.
I have attached one resorption study, and model study to understand my idea.
Piyal
Use pattern of pesticides and their predicted mobility into shallow groundwater and surface water bodies of paddy lands in Mahaweli river basin in Sri Lanka
Sorption of Carbofuran and Diuron Pesticides in 43 Tropical Soils of Sri Lanka
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