文章摘要
王清云,甘居利,陈海刚,马胜伟,张喆,蔡文贵,贾晓平.广东沿岸牡蛎体内DDTs的时空变化趋势研究[J].水产学报,2013,37(3):436~443
广东沿岸牡蛎体内DDTs的时空变化趋势研究
Spatial-temporal Distribution Characteristics of DDTs in Oysters along Guangdong Coast,China
投稿时间:2012-08-30  修订日期:2012-12-03
DOI:DOI:10.3724/SP.J.1231.2013.38318
中文关键词: 牡蛎  DDTs  时空变化  组分特征  广东沿岸
英文关键词: Oysters  DDTs  Spatial-temporal Characteristics  Guangdong coast
基金项目:科技部科研院所社会公益研究专项(2005DIB3J021),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(GDKL2010-001).第一
作者单位E-mail
王清云 中国水产科学研究院南海水产研究所
上海海洋大学海洋科学学院 
qingyunw1@163.com 
甘居利 中国水产科学研究院南海水产研究所  
陈海刚 中国水产科学研究院南海水产研究所 上海海洋大学海洋科学学院  
马胜伟 中国水产科学研究院南海水产研究所  
张喆 中国水产科学研究院南海水产研究所  
蔡文贵 中国水产科学研究院南海水产研究所  
贾晓平 中国水产科学研究院南海水产研究所 jxp60@tom.com 
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中文摘要:
      为了解广东沿岸牡蛎体内滴滴涕(DDTs)的残留水平和时空分布情况,于1989-1993和2003-2012年间每年3月份采集广东沿岸海域的近江牡蛎,用气相色谱法测定其DDTs的含量,同时结合1980-1985年广东省海岸带污染调查的相关数据,分析了广东沿岸牡蛎体内DDTs的残留量、时空分布和组成特征,并评价了其食用安全性与生物质量。结果表明:广东沿岸牡蛎体内DDTs检出率为96.9%,检出的样品中含量范围为0.11~76.3 ng/g,平均值是(3.87±7.40) ng/g。在时间上,广东沿岸牡蛎体内DDTs含量呈现明显的阶段性变化特点, 1980s-1990s初期为显著下降阶段,2003-2007年先小幅反弹后略微下降,2008-2012年总体呈归于平稳的趋势,且该时段各年份间无显著差异(P > 0.05)。空间上,1980s初期珠江口岸段牡蛎体DDTs含量远高于粤东、粤西岸段,随着时间推移,3个岸段之间含量差距逐渐缩小,1989年之后各年间3个区域DDTs平均含量在统计学上没有显著差异(P > 0.05)。DDTs的组分特征分析显示,广东沿岸海域牡蛎体内DDTs主要来源于历史使用残留,但在1989-1993年和2003-2007年时段内可能有三氯杀螨醇来源的DDTs输入。评价结果表明,就DDTs而言,广东沿岸海域所有样品均未超我国相关残留限量标准,近年来大部分站点牡蛎食用安全,生物质量状况良好。
英文摘要:
      In each spring during 1989-1993 and 2003-2012, oyster samples(Crassotrea rivularis Gould)were collected from 16 sites along Guangdong coast, China. The contents of DDTs (including o,p’-DDT,p,p’-DDT,p,p’-DDD,p,p’-DDE) were detected by Gas chromatography with electron capture detector. Based upon the detected data of DDTs in oyster along Guangdong coast and the data taken from the Pollution Investigations of Guangdong coastal zone, China during 1980-1985, the residues levels, spatial and temporal trends and compositions of DDTs in oysters were analyzed and discussed. Also, food safety and biological quality of DDTs in oysters were assessed. The results indicated that DDTs was detected in 95.9% of the samples, and in the detectable samples, DDTs contents ranged from 0.11 to 76.3 ng/g with an average of 3.87 ng/g on wet weight basis. DDTs contents decreased obviously during the early period after DDTs was banned from 1980s to early 1990s, but presented a gentle increase owing to possible inputs of new DDTs from 2003 to 2007, with the national implementation measures for the Stockholm Convention, DDTs contents maintained steady finally from 2008 to 2012. In early 1980s, DDTs contents in Pearl River Estuary were much higher than East Guangdong coast and West Guangdong coast, but the difference of DDTs contents from these three coasts narrowed gradually with time and became not significant statistically since 1989(P >0.05). The composition analysis of DDTs in the oyster samples showed that DDTs residues were sourced mainly from the historical usage, but the higher ratios of DDT/ (DDD DDE) and o,p’-DDT /p,p’-DDT(>1)indicated that there was probably input of new DDTs which might come from dicofol in periods of 1989-1993 and 2003-2007. The DDTs residues levels of all oyster samples were below the state residual limited standards, thought during the period of 1980s-1990s and 2003-2007, there was 4.6% of oyster samples exceeded US EPA reference limits(14.4 ng/g), and 6.7% of samples exceeded the requirement of the first grade of the National Marine Biological Quality Standard of China(10 ng/g), the biological quality of DDTs in oysters was good and the food safety was acceptable in recent years.
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