Impact of bare and CMC-coated Fe oxide nanoparticles on microbial activity and immobilising zinc, lead, and cadmium in a contaminated soil. Issue 11 (19th September 2023)

• Record Type: Journal Article
• Authors: Bidast, Solmaz; Golchin, Ahmad; Baybordi, Ahmad; Mohseni, Amir; Naidu, Ravi
• Is Part Of: Archives of agronomy and soil science. Volume 69:Issue 11(2023)
• Page Start: 2104
• Page End: 2120
• Publication Date: 2023-09-19
• Subjects: Carboxymethyl cellulose -- Fe oxide nanoparticles -- microbial biomass carbon -- potentially toxic elements -- soil respiration; Horticulture -- Periodicals; Soils -- Periodicals; 630.5
• DOI: 10.1080/03650340.2022.2137875
• Languages: English
• ISSNs: 0365-0340

Abstract

ABSTRACT: The potential of bare and carboxymethyl cellulose (CMC)-coated iron oxide nanoparticles (FeONPs), including goethite, hematite, and magnetite, for stabilisation of lead (Pb), zinc (Zn), and cadmium (Cd) in contaminated soil was investigated in a greenhouse experiment. The results showed that FeONPs application decreased the availability of potentially toxic elements in soil, and CMC-coated NPs were more effective than bare NPs. CMC-coated goethite proved to be the most effective treatment in reducing the Zn and Cd availability. Its application decreased the diethylenetriaminepentaacetic acid (DTPA) extractable Zn and Cd concentrations by 49% and 56%, respectively. CMC-coated magnetite was the most effective treatment for the stabilisation of Pb. Its application decreased the DTPA-extractable Pb by 56%. Carbon dioxide (CO2 ) emission and microbial biomass carbon (MBC) were higher in samples treated with CMC-coated FeONPs than bare FeONPs-treated samples, indicating that CMC coating NPs enhanced microbial activity. CO2 emission and MBC were approximately three and five times higher, respectively, in samples treated with CMC-coated goethite than the control. This study suggests that coating of bare FeONPs with CMC improves the adsorption capacity of NPs, making them more chemically reactive, and is a possible technique to reduce the likely antibacterial effects of bare FeONPs.