荆江航道疏浚土优先控制污染物筛选研究

Screening the precedence-controlled pollutants in dredged soil of the Jingjiang river waterway

以美国EPA优先控制污染物和中国优先控制污染物为基础,以文献报道长江水质污染物检测数据为依据,利用综合评分法结合德尔菲法筛选荆江航道疏浚土优先控制污染物。结果表明,荆江航道疏浚土优先控制污染物为农药、金属、多环芳烃、多氯联苯、酚类、苯类、挥发性卤代烃、酞酸酯类、全氟类等9大类污染物,主要集中在DDT、镉、铅和汞等10种污染物。鉴于以上优先控制污染物具有较强的环境持久性,在航道疏浚过程中应加强污染物的监测和评估。

Based on the precedence-controlled pollutants of EPA in America and the precedence-controlled pollutants in China, and according to the test data reported in the literatures about the water quality pollutants in the Yangtze River, this paper utilized the comprehensive scoring method combining with Delphi method to screen the precedence-controlled pollutants in dredged soil of the Jingjiang river waterway. Results show that the typical pollutants in dredged soil of the Jingjiang river waterway are nine kinds of main pollutants including pesticide, metal, PHA, PCB, phenols, benzenes, volatile halogenated hydrocarbon, phthalic esters; perfluorinated compounds, and mainly center on 10 kinds of pollutants such as DDT, cadmium, lead, mercury, etc. Considering that the precedence-controlled pollutants above own strong environmental persistence, the monitoring and evaluation shall be strengthened for the pollutants in the channel dredging process