珠江虎门潮汐水道多环芳烃的分布、组成及来源分析

采用GF／F玻璃滤膜对珠江虎门潮汐水道水样进行过滤，分离出颗粒相和溶解相多环芳烃：定量分析结果显示，2001年洪、枯季水体中多环芳烃总最分别是786～2098ng／L和11360～34338ng／L，16种优控多环芳烃含量分别为223～614ng／L和6559～20031ng／L。广州前航道多环芳烃的含量高于狮子洋水样的含量：珠江虎门潮汐水道水体中多环芳烃的含量、分布具有明显的季节变化特征，枯季多环芳烃总量高于洪季1个数量级。多环芳烃的组成及其特祉参数分析表明，珠江虎门潮汐水道水体中多环芳烃主要来源于矿物燃料燃烧和汽车排放。

Distribution, Composition and Sources of Polycyclic Aromatic Hydrocarbons in the Surface Water of the Pearl River Artery Estuary

Surface water samples from Humen tidal channel were collected in 2001 and filtered by GF/F filter. Polycyclic aromatic hydrocarbons (PAHs) in particulate and dissolved phase, including parent, alkylated and sulfur/oxygenated PAHs were identified and measured in surface water from Humen tidal channel in the Pearl River estuary, the main branch of the Pearl River from Guangzhou channel via Lingdingyang Estuary to the South China Sea during both low flow and high flow seasons in 2001. Total PAHs concentrations variy from 11 360 to 34 338 ng/L and 786 to 2 098 ng/L in low flow season and high flow season respectively, and the 16 PAHs are from 6 559 to 20 031 ng/L and 223 to 614 ng/L in low flow season and high flow season respectively. The PAH concentrations in Guangzhou channel are greater than those in the Shiziyang channel. PAH concentrations and distributions change seasonally, and PAH Concentrations in the low flow season are one order of magnitude higher than those in the high flow season. PAH composition and isomer ratios of PAH components indicate that vehicular emissions and fossil fuel combustion are the major sources of PAHs.