论文部分内容阅读
在舟山青浜岛采集了14个生物样品及对应点位的3个海水样品,利用气相色谱(GC-ECD)测定六六六(HCHs)和滴滴涕(DDTs)的浓度,分析不同点位水体及水产品中有机氯农药的分布与富集特征.结果表明,舟山青浜岛HCHs和DDTs检出率高达100%.海产品中HCHs含量范围0.09~11.51 ng·g-1,平均值为2.02 ng·g-1,DDTs含量范围0.02~56.15 ng·g-1,平均值为12.36 ng·g-1;海水样品中HCHs含量范围0.07~0.20 ng·L-1,平均值为0.13 ng·L-1,DDTs含量范围0.23~0.41ng·L-1,平均值为0.34 ng·L-1.整体而言,研究区样品中DDTs残留高于HCHs残留.与国内外其他研究区域相比,青浜岛水生物中有机氯农药残留处于较低水平.对照相应标准可以看出,所有样品均未超过国家相应标准(食品安全国家标准GB2763-2012、海水水质标准GB 3097-1997).通过比值法来源分析得知,青浜岛海域HCHs和DDTs主要为外源输入.OCPs的空间分布特征分析显示,海洋上升流及其锋面的变化是影响OCPs分布的主要因素.水体中OCPs分布与青浜岛的特殊地形有关,且人类活动对当地环境的影响是水体OCPs的贡献方式之一.健康风险评价表明,该区域居民通过食用海产品OCPs平均日摄入量远低于FAO/WHO限定的每日可摄入量(ADI),说明该地区居民食用海产品对人体健康影响较小.
14 biological samples and 3 seawater samples were collected from Qingdao Island, Zhoushan. The concentrations of HCHs and DDTs were determined by gas chromatography (GC-ECD) The distribution and enrichment characteristics of organochlorine pesticides in aquatic products showed that the detection rates of HCHs and DDTs in Qingbabao Island in Zhoushan were as high as 100% .The content of HCHs in seafood ranged from 0.09 to 11.51 ng · g-1 with an average value of 2.02 ng · The content of DDTs ranged from 0.02 to 56.15 ng · g-1 and the average value was 12.36 ng · g-1. The content of HCHs in seawater ranged from 0.07 to 0.20 ng · L-1 with an average of 0.13 ng · L- 1, DDTs ranged from 0.23 to 0.41 ng · L-1, with an average value of 0.34 ng · L-1.On the whole, DDTs residues were higher than HCHs residues in the study area.Compared with other research areas at home and abroad, Island aquatic organochlorine pesticide residues at a low level.Control the corresponding standards can be seen that all samples did not exceed the corresponding national standards (national food safety standards GB2763-2012, seawater quality standards GB 3097-1997) by ratio method source It was found that HCHs and DDTs in Qinghai Island were mainly exogenous inputs.Analysis of the spatial distribution of OCPs showed that the upwelling of the ocean and its The change of surface area is the main factor affecting the distribution of OCPs.OCP distribution in water body is related to the special topography of Qingbang Island and the contribution of human activities to the local environment is one of the contribution ways of OCPs.Health risk assessment shows that residents in this area The average daily intakes of OCPs for edible seafood are much lower than the FAO / WHO-defined daily adulterable intake (ADI), indicating that human consumption of seafood in the region has less impact on human health.