多源农业有机投入品释放有机质对纳米塑料聚集的影响

张潇雨; 马杰; 霍莉莉; 孙艺璇; 刘勇; 冯冰聪

文章摘要

张潇雨,马杰,霍莉莉,孙艺璇,刘勇,冯冰聪.多源农业有机投入品释放有机质对纳米塑料聚集的影响[J].农业环境科学学报,2026,45(3):579-591.

多源农业有机投入品释放有机质对纳米塑料聚集的影响

Effects of organic matter released from multi-source agricultural organic inputs on nanoplastic aggregation

投稿时间：2025-04-14

DOI：10.11654/jaes.2025-0352

中文关键词: 农业有机投入品纳米塑料异质聚集溶解性有机质 Zeta电位

英文关键词: agricultural organic inputs nanoplastics heteroaggregation dissolved organic matter（DOM） Zeta potential

基金项目:国家自然科学基金面上项目（42377409）；天津自然科学基金面上项目（23JCYBJC00310）；中国农业科学院科技创新工程项目

作者	单位	E-mail
张潇雨	农业农村部环境保护科研监测所, 天津 300191
马杰	农业农村部环境保护科研监测所, 天津 300191	majie@caas.cn
霍莉莉	农业农村部环境保护科研监测所, 天津 300191
孙艺璇	农业农村部环境保护科研监测所, 天津 300191 天津理工大学环境科学与安全工程学院, 天津 300384
刘勇	农业农村部环境保护科研监测所, 天津 300191
冯冰聪	农业农村部环境保护科研监测所, 天津 300191

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中文摘要:

为阐明农业有机投入品来源溶解性有机质（DOM）、纳米塑料（NPs）表面官能团异质性与阳离子价态（Na⁺/Ca²⁺）协同调控NPs聚集的机制，本研究选取3种DOM（BC_DOM、WS_DOM、CM_DOM）及无官能团NPs（NPs-Bare）、羧基NPs（NPs-COOH）和醛基聚苯乙烯NPs（NPs-CHO），通过聚集动力学实验，结合动态光散射和Zeta电位分析，系统探究DOM类型、NPs官能团及电解质浓度（Na⁺100~800 mmol·L^-1，Ca²⁺10~60 mmol·L^-1）对NPs聚集的耦合效应。结果表明：DOM对NPs的影响具显著来源依赖性，富蛋白质的CM_DOM在Na⁺体系中对3种NPs聚集的抑制作用最强（近完全稳定），高芳香性的BC_DOM抑制作用最弱，WS_DOM（含木质素/糖类）居中；Na⁺体系中DOM显著提升临界聚集浓度（如NPs-Bare的临界聚集浓度自600 mmol·L^-1升至800 mmol·L^-1）；高浓度Ca²⁺通过桥联作用介导CM_DOM/WS_DOM促进NPs-COOH/NPs-CHO聚集（临界聚集浓度降低）；NPs官能团对DOM的稳定作用有较大影响，CM_DOM对NPs-COOH稳定作用最强，CM_DOM对NPs-Bare抑制作用的强度低于NPs-COOH但高于NPs-CHO，NPs-CHO呈现出复杂的电荷响应。研究阐明了农业多源DOM、NPs官能团异质性与阳离子价态协同调控异质聚集的机制，DOM的来源特性决定其抑制效率，阳离子价态可以调控聚集作用方向，NPs官能团特性影响聚集作用的响应程度。

英文摘要:

To elucidate the mechanism by which dissolved organic matter（DOM） derived from agricultural organic inputs, surface functional group heterogeneity of nanoplastics（NPs）, and cation valence（Na⁺/Ca²⁺）synergistically regulate NPs aggregation, this study selected three types of DOM（BC_DOM, WS_DOM, CM_DOM）along with non-functionalized NPs（NPs-Bare）, carboxyl-modified NPs（NPsCOOH）, and aldehyde-modified polystyrene NPs（NPs-CHO）. Aggregation kinetics experiments were conducted, combined with dynamic light scattering and Zeta potential analysis, to systematically investigate the coupling effects of DOM type, NPs functional groups, and electrolyte concentration（Na⁺ 100-800 mmol·L^-1, Ca²⁺ 10-60 mmol·L^-1）on NPs aggregation. The results demonstrated that：DOM effects exhibited significant source dependency. Protein-rich CM_DOM showed the strongest inhibitory effect（near-complete stabilization）on all three NPs in Na⁺ systems, while highly aromatic BC_DOM exhibited the weakest inhibition. WS_DOM（containing lignin/carbohydrates）displayed an intermediate effect; In Na⁺ systems, DOM significantly increased the critical coagulation concentration（CCC）（e.g., CCC_Na for NPs-Bare rose from 600 mmol·L^-1 to 800 mmol·L^-1）; High concentrations of Ca²⁺ mediated bridging effects, enabling CM_DOM / WS_DOM to promote aggregation of NPs-COOH/NPs-CHO（reducing CCC）. NPs functional groups significantly influenced DOM stabilization：CM_DOM provided the strongest stabilization for NPs-COOH. While weaker for NPs-Bare than NPs-COOH, CM_DOM′ s inhibitory effect on NPs-Bare was stronger than on NPs-CHO. NPs-CHO exhibited complex charge-dependent behavior. This study elucidates the mechanism of heterogeneous aggregation synergistically regulated by multi-source agricultural DOM, NPs functional group heterogeneity, and cation valence. Specifically, DOM source characteristics determine its inhibition efficiency, cation valence governs the direction of aggregation effects, and NPs functional group properties dictate the sensitivity of the aggregation response.

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