深圳蛇口港及深圳湾潮间带动物的有机锡污染

Organotin Pollution in Marine Animals along Intertidal Zone at Shekou Harbor and Shenzhen Bay

以异辛烷为萃取剂、四乙基硼化钠为衍生剂对样品进行同步化液-液萃取衍生反应,采用气象色谱-火焰光度检测法,研究了深圳蛇口港及深圳湾海域潮间带动物的有机锡污染状况。结果显示,所有站位采集的双壳类体内普遍检测出三苯基锡、三丁基锡及其降解产物二丁基锡,含量分别为127.1～349.1、6.3～380.8及2.7～99.9ng/g(湿重)。采自赤湾和东角头的渔舟蜒螺体内存在较高含量的三苯基锡567.3～651.6ng/g(湿重)。所有软体动物均未检测出单丁基锡。采自红树林的纹藤壶含127.1ng/g(湿重)的三苯基锡,但未检测出丁基锡。文章结果与国内外已有的相关数据比较表明,蛇口港潮间带动物已经受到较严重的有基锡污染,深圳湾的海洋生物也受到一定程度的污染。深圳湾红树林国家自然保护区对于生物多样性的维持及侯鸟的保护都极其重要,该海区的有机锡污染问题需要引起高度重视。

Organotin contamination was studied in marine animals along intertidal zone at Shekou Harbor and Shenzhen Bay. Organotin compounds were quantified by gas chromatography-flame photometric detector （GC-FPD）, after sample pretreatment with simultaneous liquid-liquid extraction with iso-octane and derivatization with tetraethyl borate, Result showed that the concentrations of triphenyltin （TPT）, trihutyltin （TBT） and its metabolite dibutyltin （DBT） in bivalves were 127.1-349.1, 6.3-380.8 and 2.7-99.9ng/g （wet weight） respectively. The concentrations of TPT were 567.3-651.6ng/g（wet weight） in Nerita albicilla Linnaeus collected from Chiwan and Dongjiaotou. Monobutyltin （MBT） was not detected in all mollusks. The concentration of TPT was 127.1ng/g （wet weight） in Balanus amphitrite collected from Hongshulin, while butyltins were not detected in Balanus amphitrite. Comparing the present results with reported data worldwide, it is shown that marine animals along intertidal zone at Shekou Harbor were severely contaminated by organotins, and marine animals in Shenzhen Bay were also contaminated by organotins. Since national mangrove and bird nature reserve at Shenzhen Bay is very important for keeping biodiversity and protecting migrating birds, more attentions should be paid to the problem of organotin contamination in Shenzhen Bay.