Isotopic characteristics of antifouling paints and fractionation of Cu and Zn isotopes during dissolution by seawater and their adsorption to marine sediments

Seokyoon Jang; Mansik Choi; Youn-Joong Jeong; Dongjin Joe; Dasom Yang; Minjae Lee; Jinwoo Kim

doi:10.1016/j.marpolbul.2024.117423

Isotopic characteristics of antifouling paints and fractionation of Cu and Zn isotopes during dissolution by seawater and their adsorption to marine sediments

Mar Pollut Bull. 2024 Dec 18:211:117423. doi: 10.1016/j.marpolbul.2024.117423. Online ahead of print.

Authors

Seokyoon Jang¹, Mansik Choi², Youn-Joong Jeong³, Dongjin Joe⁴, Dasom Yang⁵, Minjae Lee⁵, Jinwoo Kim⁶

Affiliations

¹ Institute of Coastal Management and Technology, Jeonnam 58552, Republic of Korea.
² Department of Marine Environmental Sciences, Chungnam National University, Daejeon 34134, Republic of Korea; Department of Earth, Environmental & Space Sciences, Chungnam National University, Daejeon 34134, Republic of Korea. Electronic address: mschoi@cnu.ac.kr.
³ Research Center for Geochronology & Isotope Analysis, Korea Basic Science Institute, Chungbuk 28119, Republic of Korea.
⁴ Department of Marine Environmental Sciences, Chungnam National University, Daejeon 34134, Republic of Korea.
⁵ Department of Earth, Environmental & Space Sciences, Chungnam National University, Daejeon 34134, Republic of Korea.
⁶ Marine Research Institute, Chungnam National University, Daejeon 34134, Republic of Korea.

PMID: 39700702
DOI: 10.1016/j.marpolbul.2024.117423

Abstract

The elemental and isotopic (δ⁶⁵Cu and δ⁶⁶Zn) characteristics of 34 AFP samples from 5 paint manufacturers, the isotopic fractionation during the dissolution of AFPs by seawater, and the subsequent adsorption of isotopes onto coastal fine-grained sediments were investigated to identify potential indicators (metal ratios and isotopes). The δ⁶⁵Cu and δ⁶⁶Zn values for 34 AFPs could be divided into 2 groups regardless of the type of paint or manufacturer. Dissolution by seawater induced substantial fractionation but δ⁶⁵Cu and δ⁶⁶Zn approached the bulk AFP values when the leached fraction increased. The adsorption of metals onto marine sediments resulted in substantial fractionation (Δ⁶⁵Cu_soln-solid = 0.91 ± 0.30 ‰ and Δ⁶⁶Zn = -0.14 ± 0.07 ‰), but the δ⁶⁵Cu values in sediments were similar to those in bulk AFP because almost all of the Cu adsorbed to marine sediments within 12 h.

Keywords: AFPs; Coastal sediment; Cu isotope; Fractionation; Metal ratios; Zn isotope.