福建牙城湾海水、沉积物的环境特征及其质量评价

Characteristics and assessment of environmental quality in seawater and sediment of Yacheng Bay,Fujian

于2005年10月首次调查了福建牙城湾海域水体及沉积物的环境质量。结果表明，海水中主要超标污染物为P04-P和DIN，其含量范围分别为0．029～0．037mg／L和0．270～0．510mg／L，其它指标均符合二类海水水质标准。沉积物中各项指标基本达到《海洋沉积物质量》的一类标准，其中Hg、Ph、Cu和Cd等四种重金属的平均含量分别为0．091×10^-6、39．7×10^-6、29．3×10^-6和0．118×10^-6，有机物和硫化物的平均含量分别为0．941×10^-6和207×10^-6。湾水水体已达到富营养状态，且N为限制因子。此外，对沉积物中重金属及其他环境因子间的相关性进行了分析。

The concentrations of the major environmental items in surface seawater and sediment are reported for the first time in Yaeheng Bay in Fujian Province in Oct. 2005. The major pollutants in seawater are DRP and DIN, and their concentrations are 0. 029-0. 037 mg/L and 0. 270 -0. 510 mg/L, respectively. The contents of other environmental items in seawater are within the Second Class Standard of Seawater Quality. Most of the items in surface sediments are below the values of First-class Standard for Marine Sediments Quality. The average concentrations of Hg, Pb, Cu, Cd in surface sediments are 0. 091×10^-6 ,39.7×10^-6 ,29.3 × 10^-6 and 0.118 × 10^-6, respectively. The organic matter and sulfide are 0. 941 × 10^-6 and 207 × 10^-6, respectively. It is found that the quality in seawater in Yacheng Gulf was in eutrophication condition using the way of index E, while the limit factor is N. What＇s more, the correlations among some heavy metals and other environmental items were also analyzed.