Title: Differences in the spectroscopic characteristics of wetland dissolved organic matter binding with Fe3+,Cu2+, Cd2+, Cr3+ and Zn2+
Time: 8th July, 2021
11:50-12:00, Sign up
12:00-12:20, Presentation
12:20-12:45, Free discussion
Venue: Lecture Hall 221, No.16 Building
Speaker: Doctoral student LIU Mingxuan
Abstract: Enhancing the understanding of the binding properties of natural dissolved organic matter (DOM) and different metals is very important for the correct assessment of the ecological impact of metals. This study used spectroscopy to study the binding characteristics of Fe3+, Cu2+, Cr3+, Cd2+ and Zn2+ with dissolved organic matter in wetland water. Differential absorption spectroscopy identified the binding sites of these five metals in the wetland DOM in the 210 nm, 280 nm, 335 nm and >400 nm regions. The calculated △EEM contains natural water bodies with different fluorescent substances, which is beneficial to the migration of different metals in the environment. In addition, 2D-FTIR-COS determines the binding site and the dynamic process of binding at the functional group level. This study shows that the different components in DOM will promote the migration of different metals in the environment and provide new clues for a better understanding of the migration and transformation of metals in the aquatic environment.
