Synthesis of Iron Nanoparticles from Spartina alterniflora for Cadmium Immobilization in Coastal Wetland Sediments

Authors:
Open Access
Publisher website
Google Scholar
Abstract
A green synthesis method for iron nanoparticles was developed using the leaf extract of the invasive plant Spartina alterniflora (Sa-FeNPs), targeting the remediation of cadmium (Cd) in coastal sediments. The obtained Sa-FeNPs, characterized as amorphous Fe-O-C composites, significantly reduced the amount of bioavailable Cd. Specifically, Sa-FeNPs achieved a 34.63–38.39% decrease in the weak-acid-extractable fraction at a 7% application rate. The primary mechanisms underlying the adsorption and complexation of Cd are the large specific surface area of the Sa-FeNPs, their rich functional groups (-OH, -COOH, C=C, C-O), iron redox reactions, and total organic carbon (TOC) conversion. This study offers an environmentally friendly and low-cost remediation strategy for the utilization of excessive S. alterniflora biomass resources and controlling Cd pollution in coastal wetlands.
Funding Information
  • National Natural Science Foundation of China (32571892)
  • Open Research Fund of State Key Laboratory of Estuarine and Coastal Research (SKLECKF202306)
  • Yellow Sea Wetland Project (HHSDKT202417)
  • Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, China

This publication has 43 references indexed in Scilit: