家用净水器对饮用水中微塑料净化效率的研究

Research on the Purification Efficiency of Microplastics in Drinking Water UsingHousehold Water Purifiers

通过搭建微塑料净化效率试验装置,采用微塑料显色、红外光谱表征的定性方法以及颗粒计数的定量方法,探究了不同家用净水器对饮用水中不同粒径微塑料的去除效能。结果表明,微滤净水器(PP棉芯)、超滤净水器以及反渗透净水器对13μm以上的塑料微粒都具有良好的去除效能,去除率> 99.9%;前置过滤器的去除效能取决于其过滤精度,当微塑料粒径小于前置过滤器的滤网孔径时,过滤效果较差,去除率只有3.7%。微塑料颗粒对水的pH值和电导率值基本没有影响,但对水的浑浊度有较大影响。

By constructing a microplastic purification efficiency testing device and using qualitative methods such as microplastic color development and infrared spectroscopy characterization,as well as quantitative methods such as particle counting,the removal efficiency of different household water purifiers on microplastics with different particle sizes in drinking water was investigated.The results show that microfiltration water purifiers(PP cotton core),ultrafiltration water purifiers,and reverse osmosis water purifiers have good removal efficiency on 13μm microplastic,with a removal rate exceeds 99.9%;the removal efficiency of the pre filter depends on its filtration accuracy.When the particle size of microplastics is smaller than the pore size of the pre filter,the filtration effect is poor,with a removal rate of only 3.7%.Microplastic particles have no effect on the pH value and conductivity value of the water,but have a greater effect on the turbidity of the water.