| 引用本文: | 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. |
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| 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 |
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马欣云1,2, 陈渊戈2, 李圣法2, 姜亚洲2, 吴立冬3, 王云龙2, 全为民2, 欧阳珑玲2
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1.上海海洋大学水产与生命学院, 上海 201306;2.中国水产科学研究院东海水产研究所 农业农村部东海渔业资源开发利用重点实验室, 上海 200090;3.中国水产科学研究院农村部水产品质量安全控制重点实验室, 北京 100141
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| 摘要: |
| 本文在不同pH、盐度、藻细胞密度、磁性纳米颗粒浓度和接触时间条件下, 开展了聚多巴胺修饰的Fe3O4磁性纳米颗粒(Polydopamine@Fe3O4-magnetic nanoparticles, PDA@Fe3O4-MNP)对微小亚历山大藻(Alexandrium minutum)、链状亚历山大藻(Alexandrium catenella)和塔玛亚历山大藻(Alexandrium tamarense)的吸附率研究。结果表明, PDA@Fe3O4-MNP对微小亚历山大藻和塔玛亚历山大藻吸附率在pH为8.0时最高, 分别为0.991和0.884; 对链状亚历山大藻吸附的最适pH为7.4, 吸附率为0.949。PDA@Fe3O4-MNP对3种亚历山大藻的吸附率均随MNP浓度增加而增大, 最高值依次为0.989、0.967和0.898。盐度变化对微小亚历山大藻的吸附率影响不明显, 随着盐度从5增加到35, PDA@Fe3O4-MNP对其余两种亚历山大藻的吸附率显著下降(P<0.05),最低值依次为0.878和0.818。PDA@Fe3O4-MNP对3种亚历山大藻的吸附率随着藻细胞密度增加有所下降, 但当藻细胞密度为1×106 个/L时, 吸附率仍保持较高水平, 依次为0.987、0.942和0.871。增加PDA@Fe3O4-MNP与藻细胞的接触时间可提高吸附率, 吸附率最高值依次为0.989、0.978和0.913。本研究为构建磁性纳米颗粒处理压载水中亚历山大藻的方法体系提供了基础数据支撑。 |
| 关键词: 聚多巴胺 磁性纳米颗粒 吸附 亚历山大藻(Alexandrium) |
| DOI：10.11759/hykx20250124001 |
| 分类号:X55 |
| 基金项目:国家重点研发计划项目子课题(2022YFC2601305) |
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| Factors influencing the adsorption of Alexandrium spp. by polydopamine-modified magnetic nanoparticles (PDA@Fe₃O₄-MNP) |
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MA Xinyun1,2, CHEN Yuange2, LI Shengfa2, JIANG Yazhou2, WU Lidong3, WANG Yunlong2, QUAN Weimin2, OUYANG Longling2
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1.College of Fisheries and Life Science, Shanghai Ocean University, Shanghai 201306, China;2.Key Laboratory of East China Sea Fishery Resources Exploitation, Ministry of Agriculture, East China Sea Fisheries Research Institute Chinese Academy of Fishery Sciences, Shanghai 200090, China;3.Key Laboratory of Control of Quality and Safety for Aquatic Products, Ministry of Agriculture and Rural Affairs, China Academy of Fishery Science, Beijing 100141, China
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| 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 adsorption 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 × 10⁶ cells/L, the adsorption rates remained high, at 0.987, 0.942, and 0.871, for A. minutum, A. catenella, and A. tamarense, 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. |
| Key words: polydopamine magnetic nanoparticles adsorption Alexandrium algae |
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