[IIGB_All] IIGB Seminar: Sunghwan Kim [Today!]

[Mauricio Macias-Serrano]

Institute of Integrative Genome Biology Seminar

You are cordially invited to attend:
Sunghwan Kim
Department of Chemistry, Kyungpook National University, Republic of Korea
[cid:00a9d8bd-88e1-496c-84a8-f48b97320858]

Environmental Metabolomic Study on Chemicals generated from Plastic and Dye Contamination
Date: Friday, August 2, 2024
Time: 12:00 – 1:00 pm
Location: Genomics Auditorium 1102A

Abstract: This study investigates the environmental impact of chemicals released from plastic and dye
contaminants, with a focus on the degradation products of expanded polystyrene (EPS) buoys and
their effects on aquatic environments. Utilizing advanced techniques such as Ultrahigh Resolution
Mass Spectrometry (UHMS) and Liquid Chromatography-Mass Spectrometry (LC-MS), we
systematically identified and quantified the chemical compounds released from these contaminants.
EPS buoys, commonly used in aquaculture, degrade under prolonged UV exposure, releasing a
variety of chemicals. The study identified 68 compounds, including toxic substances like brominated
flame retardants and benzene derivatives. Significant levels of chemicals such as 4-
Hydroxybenzaldehyde, 4-Hydroxyacetophenone, 4-Hydroxybenzoic Acid, and Salicylic Acid were
found, indicating substantial ecological risks. The research also highlighted the presence of
hydrocarbons and oxidized degradation products in water samples, emphasizing the increased
toxicity of EPS after photodegradation. The toxicity tests, including MTT assays, confirmed the
cytotoxic effects of the degradation products, further underscoring the environmental hazards.
Additionally, the study extended to the analysis of environmental samples from rivers, highlighting the
widespread presence of these contaminants. The non-target screening revealed significant levels of
compounds like Reactive Black 5 dye degradation products and various per- and polyfluoroalkyl
substances (PFAS), indicating extensive industrial pollution. This research provides a molecular-level
understanding of how pollutants from plastics and dyes disperse and persist in the environment. The
findings stress the need for effective mitigation strategies and informed policies to address the
environmental challenges posed by plastic and dye pollutants. The insights gained here are crucial for
developing comprehensive environmental protection measures.



Best,

Mauricio Macias-Serrano

Financial Analyst 1

1206 Genomics Bldg | IIGB | University of California, Riverside

P: 951-827-2601 | mmaci023 at ucr.edu

[cid:2834eba4-b253-4869-89ec-65be34193bce]<https://iigb.ucr.edu/>[cid:1b8441eb-fda6-4f19-84c8-caee7c2e5f22]<https://cepceb.ucr.edu/>


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