Project Summary:
This research investigates the environmental degradation mechanisms (e.g., biodegradation and photodegradation) of plasticizers and brominated flame retardants (BFRs) in coastal sediments and surface soils by analyzing the relationship between degradation processes and carbon/hydrogen stable isotope fractionation. Combining gas/liquid chromatography-mass spectrometry (GC/LC-MS) with stable isotope analysis, the study quantifies pollutant concentration dynamics, establishes degradation kinetic models, and correlates isotopic fractionation patterns (kinetic isotope effects, apparent kinetic isotope effects, and enrichment factor ratios) with molecular structures to elucidate degradation pathways. By minimizing environmental interference through multi-isotope correlation analysis, the project aims to develop a novel multi-dimensional stable isotope profiling framework for deciphering organic pollutant degradation mechanisms. This methodology will enhance the accuracy of degradation pathway identification and support risk assessment strategies for persistent contaminants.

Schematic diagram of the project's technical research pathway

Principal Investigator:

Dr. Honggang Ni
Duration: January 2019 – December 2022