董明潭,罗泽娇,叶志航,孙越.废塑料再生企业排污河道沉积物酞酸酯污染特征与生态风险评价[J].环境科学学报,2019,39(5):1607-1616
废塑料再生企业排污河道沉积物酞酸酯污染特征与生态风险评价
- Contamination and ecological risk of phthalate acid esters in sediments around wasted plastic processing and recycling industries
- 基金项目：国家科技攻关计划（No.2017YFD0801005）；国家自然科学基金（No.41672246）；湖北省技术创新专项（No.2017ACA092，2016ACA171）；国家级大学生创新创业训练计划项目（No.201810491087）
- 董明潭
- 中国地质大学(武汉)李四光学院, 武汉 430074
- 罗泽娇
- 中国地质大学(武汉)环境学院, 武汉 430074
- 叶志航
- 中国地质大学(武汉)李四光学院, 武汉 430074
- 孙越
- 中国地质大学(武汉)李四光学院, 武汉 430074
- 摘要：为研究酞酸酯（PAEs）的环境行为及其生态风险，特选择有近30年废塑料处理历史的莱州市沙河镇珍珠河流域为研究对象，采集了26个0~10 cm表层沉积物样品与8个10~30 cm底层沉积物样品，采用GC-MS测试了被USEPA列为优先控制污染物的6种PAEs含量，分析其污染水平、空间分布、表层与底层沉积物中PAEs含量差异并进行生态风险评价.结果表明，表层沉积物中酞酸酯总含量（∑6PAEs）范围为nd~39.36 mg·kg-1，平均含量为10.42 mg·kg-1；DEHP含量范围为nd~35.90 mg·kg-1，平均含量为9.46 mg·kg-1，占∑6PAEs的90.8%.底层沉积物中酞酸酯总含量（∑6PAEs）范围为nd~97.11 mg·kg-1，平均含量为21.64 mg·kg-1；DEHP含量范围为nd~93.9 mg·kg-1，平均含量为20.4 mg·kg-1，占∑6PAEs的94.1%.底层沉积物中DEHP与DnOP的贡献率较表层高，但表层沉积物中各类PAEs及∑6PAEs含量高于底层沉积物.在空间特征上，PAEs与废塑料处理产业集中区域密切相关，同时显示出与河道动力学相关的不均衡性.生态风险评价显示，该地PAEs污染具有较大的不可接受的生态风险.
- Abstract：In order to study the environmental behavior and ecological risk of phthalate esters (PAEs), the Zhenzhu River Basin of Shahe Town, Laizhou City, which has nearly 30 years history of the wasted plastic processing and recycling, was chosen as research area. A total of 26 samples were collected from surface sediment at a depth of 0~10 cm and 8 samples were collected from bottom sediment at a depth of 10~30 cm. All were analyzed by GC-MS to determine the content of 6 phthalate esters (PAEs) classified by USEPA as the priority pollutants. The pollution level, the spatial distribution, difference of content in surface sediment and bottom sediment were studied to evaluate the ecological risk. Results show that the total concentration of phthalate esters (∑6PAEs) in the surface layer ranged from nd to 39.36 mg·kg-1, with an average content of 10.42 mg·kg-1; the DEHP ranged from nd to 35.90 mg·kg-1, with an average content of 9.46 mg·kg-1, accounting for 90.8% of ∑6PAEs. The ∑6PAEs in the bottom layer ranged from nd to 97.11 mg·kg-1, with an average content of 21.64 mg·kg-1; DEHP ranged from nd to 93.9 mg·kg-1, with an average content of 20.4 mg·kg-1, accounting for 94.1% of ∑6PAEs. The contribution of DEHP and DnOP in the bottom sediment is higher than that in the surface layer. In general, the concentration of 6 individual PAEs and ∑6PAEs in the surface sediment is higher than bottom sediment. In terms of spatial characteristics, PAEs are closely related to the centralized area of the wasted plastic processing and recycling industry, indicating that PAEs pollution has space limitation which was impacted by river dynamics. The ecological risk assessment shows that this area has a large unacceptable ecological risk.
