海洋科学2025，Vol.49Issue(5)：47-55,9.DOI:10.11759/hykx20250124001
聚多巴胺修饰的磁性纳米颗粒(PDA@Fe3O4-MNP)对亚历山大藻吸附的影响因素
Factors influencing the adsorption of Alexandrium spp.by polydopamine-modified magnetic nanoparticles(PDA@Fe3O4-MNP)
摘要
Abstract
The adsorption efficiency of polydopamine@Fe3O4-magnetic nanoparticles(PDA@Fe3O4-MNPs)on three species of Alexandrium algae(Alexandrium minutum,Alexandrium catenella,and Alexandrium tamarense)was investigated under different pH,salinity,algal cell density,magnetic nanoparticle(MNP)concentration,and contact time conditions.The results revealed that the optimal pH for the adsorption of A.minutum and A.tamarense by PDA@Fe3O4-MNP was 8.0,with adsorption rates of 0.991 and 0.884,respectively.The optimal pH for the ad-sorption of A.catenella was 7.4,with an adsorption rate of 0.949.The adsorption rates for all Alexandrium algae increased with the concentration of PDA@Fe3O4-MNP,with maximum adsorption rates of 0.989,0.967,and 0.898 for A.minutum,A.catenella,and A.tamarense,respectively.Salinity had little effect on the adsorption rate of A.minutum;however,for the other two Alexandrium algae,the adsorption rate decreased significantly with increasing salinity(P<0.05),with values of 0.878 and 0.818 for A.catenella and A.tamarense,respectively.The adsorption rates of all three Alexandrium algae decreased as the algal cell density increased,but even at a density of 1×10⁶cells/L,the adsorption rates remained high,at 0.987,0.942,and 0.871,for A.minutum,A.catenella,and A.tama-rense,respectively.Extending the contact time increased the adsorption rates,with values of 0.989,0.978,and 0.913,for A.minutum,A.catenella,and A.tamarense,respectively.This study provides data for constructing a method system for the treatment of Alexandrium algae in ballast water with MNPs.关键词
聚多巴胺/磁性纳米颗粒/吸附/亚历山大藻(Alexandrium)Key words
polydopamine/magnetic nanoparticles/adsorption/Alexandrium algae分类
资源环境引用本文复制引用
马欣云,陈渊戈,李圣法,姜亚洲,吴立冬,王云龙,全为民,欧阳珑玲..聚多巴胺修饰的磁性纳米颗粒(PDA@Fe3O4-MNP)对亚历山大藻吸附的影响因素[J].海洋科学,2025,49(5):47-55,9.基金项目
国家重点研发计划项目子课题(2022YFC2601305)[The National Key Research and Development Program of China,No.2022YFC2601305)] （2022YFC2601305）
