海南岛沿岸牡蛎体内DDTs的时空分布特征及评价  

Characteristics and evaluation of temporal and spatial distribution of DDTs in oysters along coastal waters of Hainan Island,China

作　　者：王清云[1,2] 甘居利[1] 陈海刚[1,2] 马胜伟[1] 张喆[1] 蔡文贵[1] 贾晓平[1] 

机构地区：[1]中国水产科学研究院南海水产研究所,广东省渔业生态环境重点实验室,农业部南海渔业资源开发利用重点实验室,农业部南海渔业资源环境科学观测实验站,广东广州510300 [2]上海海洋大学海洋科学学院,上海201306

出　　处：《南方水产科学》2012年第5期1-8,共8页South China Fisheries Science

基　　金：广东省科技计划项目(2009B030600001,2011A050902006);中央级公益性科研院所基本科研业务费专项资金(中国水产科学研究院南海水产研究所)资助项目(2009YD01,2010YD04,2010TS12);广东省渔业生态环境重点实验室重点开放课题(GD-KL2010-001)

摘　　要：于2006年～2012年在海南岛东寨港、马袅港、八所港和榆林港4个典型港湾采集近江牡蛎(Crassostrea riv-ularis)样品,用气相色谱法测定其滴滴涕(DDTs)的质量分数。结果显示,DDTs残留范围为未检出～4.51 ng.g-1(湿质量),平均为1.45 ng.g-1,4个采样点w(DDTs)的区域差异不显著(P>0.05)。与国内外其他海域相比,海南岛沿岸贝类体内DDTs残留水平较低。在2006年～2012年间,DDTs于2007年出现了一个相对高值,之后5年呈先下降后趋于平稳的趋势。此研究结果与1985年海南岛近海贝类体内的DDTs残留量均处于100ng.g-1水平级范围。通过对牡蛎样品DDTs的组分特征分析,认为目前检测到的DDTs主要来源于历史使用残留,但推断2006年～2007年可能有三氯杀螨醇来源的DDTs输入。结果表明,海南岛沿岸牡蛎体内DDTs符合中国《海洋生物质量》一类质量标准,也未超出中国相关残留限量标准,其食品安全风险在可接受范围内。During 2006~2012, we collected oysters （Crassostrea rivularis） from Dongzhai Harbor, Maniao Harbor, Basuo Harbor and Yulin Harbor which are along the coastal waters of Hainan Island, China, to determine the DDTs contents by gas chromatography with electron capture detector. The results show that the DDTs contents vary from undetectable to 4.51 ng·g-1 （wet weight） with an average of 1.45 ng·g-1. No significant difference is found in DDTs contents among the 4 sampling sites （P〉0.05）. The level of DDTs residues in oyster from the coastal waters of Hainan Island is relatively lower than the other coastal areas home and abroad. The DDTs content reached the maximum in 2007 then decreased slightly and maintained steady from 2007 to 2012. The DDTs contents in shellfish from Hainan Island in both 1985 and 2006~2012 are within 100 ng·g-1. The composition analysis of DDTs in oyster reveals that DDTs residues mainly come from historical usage, but there is probably an input of new DDTs coming from dicofol during 2006~2007. DDTs residues in oyster along the coastal waters of Hainan Island meet with the requirement of the first grade of the National Marine Biological Quality Standard of China, not exceeding the state residual limited standards, and the food safety risk is acceptable.

关 键 词：牡蛎 DDTS 时空变化 风险评价 海南岛沿岸 

分 类 号：X826[环境科学与工程—环境工程]