Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Environmental Sources Remediation Sign in to save

Humic Acid and Fulvic Acid Hinder Long-Term Weathering of Microplastics in Lake Water

Environmental Science & Technology 2021 182 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 50 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.

Xiaoli Zhao Xiaoli Zhao Hanyu Wang, Xiaoli Zhao Yanqi Shi, Xiaowei Wu, Peng Liu, Xiaowei Wu, Yanqi Shi, Xiaowei Wu, Peng Liu, Zhimin Gong, Peng Liu, Peng Liu, Peng Liu, Yanqi Shi, Xiaoli Zhao Yanqi Shi, Xiaowei Wu, Xiaoli Zhao Yanqi Shi, Xiaowei Wu, Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Hanyu Wang, Yanqi Shi, Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Xiaowei Wu, Yanqi Shi, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaoli Zhao Xiaoli Zhao Xiaowei Wu, Yanqi Shi, Yanqi Shi, Zhimin Gong, Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Hexinyue Huang, Xiaoli Zhao Xiaoli Zhao Yanqi Shi, Xiaoli Zhao Xiaowei Wu, Xiaoli Zhao Hexinyue Huang, Hexinyue Huang, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Peng Liu, Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaowei Wu, Xiaoli Zhao Xiaowei Wu, Xiaoli Zhao Xiaowei Wu, Xiaoli Zhao Xiaowei Wu, Zhimin Gong, Xiaowei Wu, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Zhimin Gong, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaowei Wu, Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Peng Liu, Peng Liu, Peng Liu, Peng Liu, Hanyu Wang, Hanyu Wang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Zhimin Gong, Yanqi Shi, Hanyu Wang, Hanyu Wang, Hexinyue Huang, Peng Liu, Xiaowei Wu, Xiaowei Wu, Yanqi Shi, Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Xiaowei Wu, Xiaowei Wu, Hanyu Wang, Hexinyue Huang, Xiaoli Zhao Hanyu Wang, Hanyu Wang, Xiaowei Wu, Hanyu Wang, Hanyu Wang, Yanqi Shi, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Hanyu Wang, Peng Liu, Peng Liu, Peng Liu, Zhimin Gong, Shixiang Gao, Peng Liu, Yanqi Shi, Yanqi Shi, Xiaowei Wu, Hexinyue Huang, Hexinyue Huang, Yanqi Shi, Hexinyue Huang, Hanyu Wang, Hexinyue Huang, Hanyu Wang, Hanyu Wang, Hexinyue Huang, Zhimin Gong, Hanyu Wang, Hexinyue Huang, Hexinyue Huang, Hexinyue Huang, Zhimin Gong, Hexinyue Huang, Hexinyue Huang, Zhimin Gong, Zhimin Gong, Yanqi Shi, Yanqi Shi, Zhimin Gong, Yanqi Shi, Zhimin Gong, Yanqi Shi, Zhimin Gong, Yanqi Shi, Yanqi Shi, Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Yanqi Shi, Xiaowei Wu, Hexinyue Huang, Shixiang Gao, Peng Liu, Yanqi Shi, Hanyu Wang, Peng Liu, Hexinyue Huang, Xiaowei Wu, Yanqi Shi, Xiaoli Zhao Peng Liu, Hanyu Wang, Shixiang Gao, Yanqi Shi, Xiaoli Zhao Hexinyue Huang, Yanqi Shi, Xiaowei Wu, Hexinyue Huang, Shixiang Gao, Xiaoli Zhao Hexinyue Huang, Hexinyue Huang, Shixiang Gao, Peng Liu, Zhimin Gong, Yanqi Shi, Xiaoli Zhao Zhimin Gong, Yanqi Shi, Xiaoli Zhao Shixiang Gao, Xiaoli Zhao Xiaoli Zhao Xiaoli Zhao Shixiang Gao, Peng Liu, Shixiang Gao, Xiaowei Wu, Peng Liu, Shixiang Gao, Shixiang Gao, Zhimin Gong, Zhimin Gong, Xiaoli Zhao Peng Liu, Peng Liu, Xiaowei Wu, Shixiang Gao, Shixiang Gao, Shixiang Gao, Shixiang Gao, Peng Liu, Shixiang Gao, Shixiang Gao, Yanqi Shi, Shixiang Gao, Yanqi Shi, Xiaoli Zhao Shixiang Gao, Yanqi Shi, Yanqi Shi, Shixiang Gao, Shixiang Gao, Shixiang Gao, Shixiang Gao, Xiaoli Zhao Xiaoli Zhao

Summary

Researchers found that humic acid and fulvic acid in lake water significantly inhibit the photoaging of polypropylene microplastics under UV irradiation, suggesting that natural organic matter may slow microplastic weathering and prolong their persistence in freshwater environments.

Polymers

Study Type Environmental

We investigated the photoaging of polypropylene (PP) microplastics (MPs) in lake water. The results showed that photoaging of PP MPs was significantly inhibited in lake water compared with ultrapure water after 12 d of ultraviolet (UV) irradiation, and humic acid and fulvic acid, rather than carbonate (CO32-), nitrate (NO3-), or chloride (Cl-) ions, were identified as the primary contributors to the observed inhibition. Mechanisms for the roles of humic acid (Suwannee River humic acid) and fulvic acid (Pony Lake fulvic acid) in reducing the rates of photodegradation showed that humic acid and fulvic acid acted as both reactive oxygen species (ROS) scavengers (e.g., of •OH) (dominant contribution) and optical light filters. As ROS scavengers, humic acid and fulvic acid significantly decreased the capacity for the formation of •OH and O2•- by PP MPs under irradiation. In addition, the chromophores in humic acid and fulvic acid competed for photons with MPs through the light-shielding effect, thereby causing less fragmentation of PP particles and changes in other properties (melting temperature, contact angle, and surface zeta potential). The proposed mechanisms for inhibition by humic acid and fulvic acid will aid our efforts to assess the duration of aging and alterations of MP properties during long-term weathering in natural waters.

Read via DOI PubMed

Share this paper

Post Share Share Pin Email