Effects of polystyrene microplastics on the breakthrough behavior of dissolved organic matter in carbon filtration column

IF 7.1 2区环境科学与生态学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Environmental Technology & Innovation Pub Date : 2025-07-20 DOI:10.1016/j.eti.2025.104380

Jingkun Xu, Haicheng Liu, Runxuan Li, Fei Jiang

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引用次数: 0

Abstract

The breakthrough of dissolved organic matter such as humic acid (HA) during water filtration processes is a critical factor contributing to the formation of disinfection by-products. The presence of emerging pollutants, such as microplastics, may influence this process. This study investigates the impact of polystyrene microplastics (PS-MPs) on the breakthrough of HA in granular activated carbon (GAC) columns. The presence of PS-MPs, along with their abundance and UV aging, significantly affects HA's breakthrough. Higher abundance of PS-MPs enhances HA's breakthrough by occupying adsorption sites on GAC, while UV-aged PS-MPs, due to increased hydrophilicity and surface roughness, reduces the promoting effect of PS-MPs on HA breakthrough. Orthogonal experiment revealed that flow rate, HA concentration, ionic strength, and abundance of PS-MPs influence HA's breakthrough, with flow rate being the most significant factor. Zeta potential and hydrodynamic diameter analyses showed that UV-aged PS-MPs, with more negative charges and smaller sizes, had a higher tendency to penetrate GAC, freeing up adsorption sites for HA. A backpropagation (BP) neural network model was trained to predict HA removal and optimization using a genetic algorithm (GA) further improved prediction accuracy. This study provides insights into PS-MPs & HA interactions and presents a reliable tool for predicting GAC filter performance in the presence of PS-MPs.

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聚苯乙烯微塑料对碳过滤柱中溶解有机物突破行为的影响

腐植酸（HA）等溶解性有机物在水过滤过程中的突破是消毒副产物形成的关键因素。新出现的污染物，如微塑料，可能会影响这一过程。本文研究了聚苯乙烯微塑料（PS-MPs）对HA在颗粒活性炭（GAC）柱中突破的影响。PS-MPs的存在，以及它们的丰度和紫外线老化，显著影响了HA的突破。高丰度的PS-MPs通过占据GAC上的吸附位点增强了HA的突破，而uv老化的PS-MPs由于亲水性和表面粗糙度的增加，降低了PS-MPs对HA突破的促进作用。正交试验结果表明，流速、HA浓度、离子强度、PS-MPs丰度均影响HA的突破，其中流速是影响HA突破的最显著因素。Zeta电位和水动力直径分析表明，紫外光老化的PS-MPs具有更多的负电荷和更小的尺寸，更倾向于穿透GAC，为HA释放吸附位点。利用反向传播（BP）神经网络模型进行预测，并利用遗传算法（GA）进行优化，进一步提高了预测精度。本研究为PS-MPs &；HA相互作用，并提出了一个可靠的工具，预测GAC滤波器性能在PS-MPs的存在。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Environmental Technology & Innovation Environmental Science-General Environmental Science

CiteScore

14.00

自引率

4.20%

发文量

435

审稿时长

74 days

期刊介绍： Environmental Technology & Innovation adopts a challenge-oriented approach to solutions by integrating natural sciences to promote a sustainable future. The journal aims to foster the creation and development of innovative products, technologies, and ideas that enhance the environment, with impacts across soil, air, water, and food in rural and urban areas. As a platform for disseminating scientific evidence for environmental protection and sustainable development, the journal emphasizes fundamental science, methodologies, tools, techniques, and policy considerations. It emphasizes the importance of science and technology in environmental benefits, including smarter, cleaner technologies for environmental protection, more efficient resource processing methods, and the evidence supporting their effectiveness.