Characteristics of organic pollutants in the sediments from a typical electronics industrial zone

In order to investigate the contamination status of organic pollutants in a river of a typical electrical equipment industrial area,Ronggui,Foshan,the sediments were sampled for the composition,concentration and occurrence analysis of organic pollutants.The polar and non-polar fractionation methods were employed for the fingerprint establishment of organic pollutants.One hundred and seventy-one of organic chemicals including ten categories of alkanes,alkenes,polycyclic aromatic hydrocarbons,benzene,heterocyclic compounds,phthalate esters,aldehydes,ketones,polar compounds,silicon-containing material as well as alkyl esters were examined.The number of different categories of the detected organic pollutants in a descending order was: alkanespolar compoundspolycyclic aromatic hydrocarbonsaldehydes and ketonesheterocyclic compoundsbenzene homologues,phthalate esteralkyl esterssilicon materialolefins.The abundance of detected organic pollutants in a descending order was: alkanespolar compoundsalkyl estersolefinspolycyclic aromatic hydrocarbonsphthalatessilicon materialaldehydes and ketonesheterocyclic compoundsbenzene homologues.Among the 51 kinds of alkanes detected,nonadecane accounted for 14.83%,and the persistent organic pollutants accounted for 2.33% of the total organic matter.Compared to similar studies,there were 51 kinds of alkanes and they accounted for 55.5% of the total organic chemicals,showing high diversity and abundance.In addition,some electronics industry-related organic pollutants such as silicone materials were also detected in high frequency.