电子废物拆解区羟基多氯联苯的分布及传递特征研究

Study on Distribution and Transmitting Characteristics of Hydroxyl Polychlorinated Biphenyls in E-waste Dismantling Area

[目的]初步探索多氯联苯(PCBs)在水生环境和水生生物中的转化、迁移和传递特征。[方法]通过对典型PCBs污染区域(浙江省台州市路桥区及周边地区的主要电子废物拆解区)中水体、底泥、鱼、虾和蟹等水生环境和水生生物样品中的10种羟基多氯联苯(OH-PCBs)的含量进行测定。[结果]低氯化OH-PCBs可能易于在水生环境和水生生物之间分布和传递,而高氯化OH-PCBs可能倾向于在水生生物体内代谢和生物积累,并通过食物链在水生环境分布和传递。[结论]该研究不仅可为OH-PCBs对水生生物产生的安全隐患提出预警以及为风险评估提供基础数据,也有助于研究PCBs在水生环境的最终归向及存在形态、揭示水生环境中其真实污染水平,对预防OH-PCBs对食物链及各层级生物引起的安全隐患问题有重要的意义和应用前景。

[Objective] The research aimed to initially explore the transformation, migration and transmitting characteristics of polychlorinated biphenyls (PCBs) in aquatic environments and aquatic organisms.[Method]The content of 10 hydroxylated polychlorinated biphenyls (OH-PCBs) in aquatic environments and aquatic organisms such as water bodies, sediments, fish, shrimps and crabs in the contaminated area of typical PCBs (main electronic waste dismantling area in Luqiao District and surrounding areas of Taizhou City, Zhejiang Province) were determined.[Result]Low chlorinated OH-PCBs may be easily distributed and transferred between aquatic environmental and fishery products. Hyper chlorinated OH-PCBs may be tended to be metabolized and bio-accumulated in aquatic organisms, and then they distribute and transmit through the food chain in the aquatic environment.[Conclusion]It is beneficial to pre-warn the problem of aquatic organisms safety originated from OH-PCBs and to provide basic data for risk assessment. And it is of great significance for the exploration of the final existing form of PCBs and to reveal the real polluted level of PCBs in aquatic environment and organisms.