混凝沉淀-超滤对微塑料去除特征及协同净水效能  

Characteristics of Microplastics Removal and Synergistic Water Purification Effect in Coagulation Sedimentation-Ultrafiltration Process

作　　者：赵志健 方皓 刘乾龙 李勇 蔡玉明 ZHAO Zhi-jian;FANG Hao;LIU Qian-long;LI Yong;CAI Yu-ming(PowerChina Eco-Environmental Group Co.Ltd.,Shenzhen 518102,China)

机构地区：[1]中电建生态环境集团有限公司,广东深圳518102

出　　处：《中国给水排水》2024年第17期36-41,共6页China Water & Wastewater

摘　　要：微塑料作为一种新污染物,在水环境中广泛存在且具有生物毒性。给水处理工艺对微塑料的去除效能影响用水安全,尤为重要。以实际水体中的微塑料为研究对象,进行了混凝沉淀-超滤去除微塑料小试。当混凝剂投量为60 mg/L时,混凝沉淀对微塑料的去除率为59.5%,且不同尺寸和形状的微塑料表现出不同的去除率。在超滤处理出水中未检测到微塑料。显微红外光谱分析表明,原水中存在4种类型的微塑料,即聚丙烯(PP)、聚对苯二甲酸乙二醇酯(PET)、聚酯纤维(PES)和聚乙烯(PE),其中混凝沉淀对PES微塑料的去除效果最好。相关性分析表明,在处理过程中,微塑料丰度与铬、铁、锰和钙等4种金属离子浓度显著相关,最大相关系数为0.91。Microplastics,as a type of emerging pollutants,are widely distributed in the aquatic environment and have biological toxicity.The removal efficiency of microplastics by drinking water treatment processes affects the safety of drinking water for residents,which is particularly important.This study took microplastics in actual water as the research object and investigated the removal efficiency of coagulation sedimentation-ultrafiltration processes on microplastics.When the coagulant dosage was 60 mg/L,the removal rate of microplastics reached 59.5%.Microplastics of different sizes and shapes showed different removal efficiencies.No microplastics was detected in the ultrafiltration effluent.Micro-Fourier transformation infrared spectroscopy showed that there were four types of microplastics in the raw water,namely polypropylene(PP),polyethylene terephthalate(PET),polyester fiber(PES),and polyethylene(PE),among which coagulation sedimentation had the best removal efficiency on PES microplastics.There was a significant correlation between the abundance of microplastics and the metal ions concentrations of chromium,iron,manganese and calcium in the whole treatment process,with the highest correlation coefficient of 0.91.

关 键 词：微塑料 混凝沉淀 超滤 共存污染物 相关性分析 

分 类 号：TU991[建筑科学—市政工程]