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Interactions between polypropylene microplastics (PP-MPs) and humic acid influenced by aging of MPs
Water Research2022
145 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 50
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Xiangliang Pan
Dongqin He,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Dongqin He,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Xiangliang Pan
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Chenyang Liu,
Chenyang Liu,
Chenyang Liu,
Jianqiang Sun,
Jun Li,
Xiangliang Pan
Xiangliang Pan
Chenyang Liu,
Xiangliang Pan
Xiangliang Pan
Dongqin He,
Dongqin He,
Dongqin He,
Xiangliang Pan
Xiangliang Pan
Dongqin He,
Dongqin He,
Dongqin He,
Dongqin He,
Dongqin He,
Dongqin He,
Chenyang Liu,
Dongqin He,
Dongqin He,
Xiangliang Pan
Xiangliang Pan
Jianqiang Sun,
Dongqin He,
Hongwei Luo,
Anping Zhang,
Hongwei Luo,
Xiangliang Pan
Dongqin He,
Xiangliang Pan
Dongqin He,
Dongqin He,
Dongqin He,
Dongqin He,
Xiangliang Pan
Jianqiang Sun,
Jianqiang Sun,
Dongqin He,
Dongqin He,
Dongqin He,
Dongqin He,
Dongqin He,
Xiangliang Pan
Dongqin He,
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Jianqiang Sun,
Chenyang Liu,
Xiangliang Pan
Anping Zhang,
Jianqiang Sun,
Jun Li,
Jianqiang Sun,
Jianqiang Sun,
Jianqiang Sun,
Jun Li,
Anping Zhang,
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Hongwei Luo,
Xiangliang Pan
Hongwei Luo,
Dongqin He,
Xiangliang Pan
Hongwei Luo,
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Jianqiang Sun,
Jun Li,
Jun Li,
Jun Li,
Jun Li,
Jun Li,
Anping Zhang,
Anping Zhang,
Hongwei Luo,
Anping Zhang,
Xiangliang Pan
Jun Li,
Hongwei Luo,
Xiangliang Pan
Hongwei Luo,
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Hongwei Luo,
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Hongwei Luo,
Hongwei Luo,
Hongwei Luo,
Xiangliang Pan
Xiangliang Pan
Jun Li,
Xiangliang Pan
Jun Li,
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Xiangliang Pan
Jun Li,
Jun Li,
Xiangliang Pan
Xiangliang Pan
Jun Li,
Xiangliang Pan
Jun Li,
Xiangliang Pan
Jun Li,
Jun Li,
Xiangliang Pan
Summary
Researchers examined how aging affects polypropylene microplastic interactions with humic acid, finding that aged microplastics with increased surface oxygen groups showed stronger adsorption of humic acid compared to pristine particles, altering their environmental behavior.
As an emerging pollutant, microplastics (MPs) may interact with dissolved organic matter (DOM) which is prevalent in the aqueous environment. Meanwhile, the aging of MPs in the actual environment increases the uncertainty of their environmental fate. Here, the interaction mechanisms between pristine and aged polypropylene microplastics (PP-MPs) and humic acid (HA) at pH 7.0 were explored. Microstructural changes of HA were examined by fluorescence and Fourier transformation infrared (FT-IR) spectroscopy. Atomic force microscopy coupled with infrared (AFM-IR) and micro-Raman techniques were used to characterize and analyze the interacted PP-MPs. The addition of HA increased the surface roughness of both pristine and aged PP-MPs. Results of AFM-IR and Raman spectra showed that the interaction of PP-MPs with HA accelerated their surface oxidation and enhanced the characteristic signals. XPS spectra showed that the oxygen content ratio of pristine and aged PP-MPs increased by 0.95% and 1.48% after the addition of HA, respectively. PP-MPs after aging interacted more strongly with HA and there was a higher affinity between them. Two-dimensional correlation spectroscopy (2D-COS) combined with FT-IR spectra further elucidated the interaction mechanism at the molecular level. This work will help to evaluate the environmental impact of MPs in ecosystems and understand their interactions with DOM.