Characteristics of Organic Pollutants in the Sediments from a Typical Electronics Industrial Zone
典型电器工业区河涌沉积物中有机污染物特征分析

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: alkanes>polar compounds>polycyclic aromatic hydrocarbons>aldehydes and ketones>heterocyclic compounds>benzene homologues, phthalate ester>alkyl esters>silicon material>olefins. The abundance of detected organic pollutants in a descending order was: alkanes>polar compounds>alkyl esters>olefins>polycyclic aromatic hydrocarbons>phthalates>silicon material>aldehydes and ketones>heterocyclic compounds>benzene 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.