酸碱度对纳米塑料与纳米活性炭异型凝聚影响  

Effect of pH on Heteroaggregation of Polystyrene Nanoplastics and Nanosized Activated Carbon

作　　者：梁萃华 梁宝月 李丽华 张锦瑾 王军华 刘嘉蕊 李致欣 陈澄宇 LIANG Cui-hua;LIANG Bao-yue;LI Li-hua;ZHANG Jin-jin;WANG Jun-hua;LIU Jia-rui;LI Zhi-xin;CHEN Cheng-yu(College of Natural Resources and Environment,South China Agricultural University,Guangdong Guangzhou 510642,China)

机构地区：[1]华南农业大学资源环境学院,广东广州510642

出　　处：《广州化工》2024年第3期46-49,共4页GuangZhou Chemical Industry

基　　金：广东省基础与应用基础研究基金项目(No:2021A1515011503);广州市基础与应用基础研究项目(No:202201010505)。

摘　　要：纳米塑料(NPs)与纳米活性炭(NAC)在环境中的共迁移会影响其环境行为。本研究探究了在模拟水溶液中,电解质和pH对不同表面改性的聚苯乙烯纳米颗粒(PSNPs)与NAC异型凝聚的影响。研究发现,由于静电斥力不同,在300 mM NaCl中,随着pH升高,APS(带氨基的PSNPs)与BPS(无表面修饰的PSNPs)的凝聚速率都呈大体下降趋势;在10 mM CaCl_(2)中,APS与NAC在高pH时发生凝聚,BPS与NAC在所有pH下均稳定分散。本研究有助于理解NPs与NAC在水环境中的异型凝聚行为。The co-transport of nanoplastics(NPs)and nanosized activated carbon(NAC)in the environment may affect their environmental behavior.The effects of electrolytes and pH on the heteroaggregation of different surface modified polystyrene nanoparticles(PSNPs)and NAC in model aqueous solutions were investigated.It was found that due to the different electrostatic repulsion,the aggregation rates of APS(PSNPs with amino group)and BPS(PSNPs without surface modification)in 300 mM NaCl solution generally declined with the increase of pH.In 10 mM CaCl_(2)solution,APS and NAC aggregated at high pH,while the BPS and NAC remained stably dispersed at all pH.This study may assist the understanding on heteroaggregation kinetics of NPs and NAC in aqueous environment.

关 键 词：聚苯乙烯纳米颗粒 纳米活性炭 模拟水环境 电解质 异型凝聚 凝聚动力学 PH 

分 类 号：X522[环境科学与工程—环境工程]