Carbon-based nanomaterials mediated adsorption and photodegradation of typical organic contaminants in aqueous fulvic acid solution

Zhiming Yin, Siyu Liu, Zhen Tian, Xinyue Zhao, Jun He, Chengjun Wang

Research output: Journal PublicationArticlepeer-review

1 Citation (Scopus)

Abstract

In this work, the formation of carbon-based nanomaterials–fulvic acid (CNMs-FA) composites and their capacities for the adsorption and photodegradation of typical organic contaminants in aqueous solutions were investigated. The results suggested that the formation of CNMs-FA composites was dominated by adsorbing FA on CNMs via the physisorption process, which fit the pseudo-first-order kinetic model and the Langmuir isotherm model. The formed CNMs-FA composites were characterized by using the Brunauer–Emmett–Teller, scanning electron microscopy, and infrared spectroscopy techniques and further applied for examining their effects on the adsorption and photodegradation of selected organic contaminants in aqueous solutions. The adsorption of organic contaminants on CNMs-FA composites is mainly involved in hydrogen bonding and electrostatic interactions between organic contaminants and FA species adhering to CNMs. In addition, the CNMs-FA composites are able to promote the photosensitive degradation of organic contaminants due to the photogenerated reactive species including ROS and CNMs-3FA* under sunlight irradiation. This study provided a deeper and more comprehensive understanding of the environmental behavior of CNMs in real natural surface water and clarified the underlying mechanisms.

Original languageEnglish
Pages (from-to)1863-1874
Number of pages12
JournalWater Science and Technology
Volume88
Issue number7
DOIs
Publication statusPublished - 1 Oct 2023

Keywords

  • adsorption
  • carbon-based nanomaterials
  • fulvic acid
  • organic contaminants
  • photodegradation

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

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