岱海冰封期微塑料与环境因子的关系及风险评价

为探究内陆湖冰封期冰盖中微塑料的污染情况及其潜在风险,在岱海冰封期进行取样,采用显微镜观察、冗余性分析和污染物风险指数评价等方法,分析冰封期冰盖中微塑料的赋存特征以及与环境因子的关系,并进行风险评价.结果表明,岱海冰盖中微塑料丰度为283～1055n/L,主要检出形态与颜色分别为纤维状与黑色,粒径以＜0.5mm为主;垂...

Relationship between microplastics occurrence and environmental factors and risk assessment during ice-covered period of the Daihai Lake

In order to investigate the contamination and potential risks of microplastics in the ice cap of inland lakes, microplastics were sampled during the ice-covered period of the Daihai Lake, Inner Mongolia, northwest. The relationship between microplastics and environmental factors was analyzed by microscopic observation, redundancy analysis and pollutant risk index evaluation. The results showed that the abundance of microplastics in the Daihai ice cap ranged from 283 to 1055n/L, and the main detectable forms and colors were fibrous and black, and the particle size was mainly <0.5mm. Vertically, the abundance of microplastics in the upper and lower ice layers was higher than that in the middle ice layer. The abundance of microplastics was significantly correlated with the concentration of total nitrogen, ammonia nitrogen and salinity, but not with other environmental factors. The risk assessment results showed that the microplastics pollution in the Daihai Lake during the ice-covered period has reached a moderate level, and the potential risk should be taken seriously.