Impact of aquaculture on distribution of dissolved organic matter in coastal Jeju Island, Korea, based on absorption and fluorescence spectroscopy SCIE SCOPUS

Cited 2 time in WEB OF SCIENCE Cited 3 time in Scopus
Title
Impact of aquaculture on distribution of dissolved organic matter in coastal Jeju Island, Korea, based on absorption and fluorescence spectroscopy
Author(s)
Kim, Jeonghyun; Kim, Yeseul; Park, Sung Eun; Kim, Tae-Hoon; Kim, Bong-Guk; Kang, Dong-Jin; Rho, TaeKeun
KIOST Author(s)
Kim, Yeseul(김예슬)Kang, Dong Jin(강동진)Rho, Tae Keun(노태근)
Alternative Author(s)
김예슬; 강동진; 노태근
Publication Year
2022-01
Abstract
In Jeju Island, multiple land-based aquafarms were fully operational along most coastal region. However, the effect of effluent on distribution and behaviours of dissolved organic matter (DOM) in the coastal water are still unknown. To decipher characteristics of organic pollution, we compared physicochemical parameters with spectral optical properties near the coastal aquafarms in Jeju Island. Absorption spectra were measured to calculate the absorption coefficient, spectral slope coefficient, and specific UV absorbance. Fluorescent DOM was analysed using fluorescence spectroscopy coupled with parallel factor analysis. Dissolved organic carbon (DOC) and total dissolved nitrogen (TDN) were measured using high-temperature catalytic oxidation. The DOC concentration near the discharge outlet was twice higher than that in natural groundwater, and the TDN concentration exponentially increased close to the outlet. These distribution patterns indicate that aquafarms are a significant source of DOM. Herein, principal component analysis was applied to categorise the DOM origins. There were two distinct groups, namely, aquaculture activity for TDN with humic-like and high molecular weights DOM (PC1: 48.1%) and natural biological activity in the coastal water for DOC enrichment and protein-like DOM (PC2: 18.8%). We conclude that the aquafarms significantly discharge organic nitrogen pollutants and provoke in situ production of organic carbon. Furthermore, these findings indicate the potential of optical techniques for the efficient monitoring of anthropogenic organic pollutants from aquafarms worldwide.
ISSN
0944-1344
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/42071
DOI
10.1007/s11356-021-15553-3
Bibliographic Citation
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, v.29, no.1, pp.553 - 563, 2022
Publisher
SPRINGER HEIDELBERG
Keywords
Aquaculture; Anthropogenic organic pollution; Chromophoric dissolved organic matter; Fluorescence excitation-emission matrix (EEM) spectroscopy; PARAFAC; Dissolved organic matter
Type
Article
Language
English
Document Type
Article; Early Access
Publisher
SPRINGER HEIDELBERG
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