长江口沉积物中SVOCs的空间分布趋势

采用GC-MS法对2005年9月8-15目采集于长江口区域的沉积物中的半挥发性有机物(SVOCs)进行测定,并对其组成和空间分布趋势进行了分析.结果表明,该区域沉积物中共检出半挥发性有机物44种,包括多环芳烃类化合物14种,酯类化合物6种,酚类化合物10种,取代苯类化合物5种,醚类化合物4种,其他类化合物5种.长江13南支沉积物中 w(SVOcs)普遍高于北支人口和徐六泾,南支附近城市排放的工业废水和生活污水可能是该区域半挥发性有机物的主要来源.沉积物中多环芳烃类化合物(PAHs)的风险评估显示,除C采样点苊存在一定的生态风险外,长江口其他区域PAHs的潜在生态风险很小.

Spatial Distribution of Semivolatile Organic Compounds in the Sediments of Yangtze River Estuary

Some semivolatile organic compounds (SVOCs) in the sediments of the Yangtze River Estuary were sampled from September 8-15, 2005, determined by GC-MS, andthe component and spatial distribution of these pollutants were analyzed. The results indicated that 44 kinds of SVOCs were detected, including 14 kinds of PAHs,6 kinds of esters, 10 kinds of phenols, 5 kinds of substituted benzenes, 4 kinds of ethers and 5 other kinds. The concentrations of SVOCs in the South Branch of the Yangtze River Estuary were higher than those in the North Branch and Xuliujing. The discharge of industrial and domestic wastewater from the South Branch might be the main source of SVOCs in the sediments of the Yangtze River Estuary. The risk evaluation of PAHs in the sediments showed that acenaphthene of sampling station Cposed a potential ecological risk, while the risk of PAHs in other regions was very low.