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http://dx.doi.org/10.7837/kosomes.2022.28.1.001

Biological Toxicity Assessment of Sediment at an Ocean Dumping Site in Korea  

Seok, Hyeong Ju (Marine Eco-Technology Institute)
Kim, Young Ryun (Marine Eco-Technology Institute)
Kim, Tae Won (Marine Eco-Technology Institute)
Hwang, Choul-Hee (Marine Eco-Technology Institute)
Son, Min Ho (Marine Eco-Technology Institute)
Choi, Ki-young (Korea Institute of Ocean Science and Technology)
Kim, Chang-joon (Korea Institute of Ocean Science and Technology)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.28, no.1, 2022 , pp. 1-9 More about this Journal
Abstract
The effect of sediments in a waste dumping area on marine organisms was evaluated using sediment toxicity tests with a benthic amphipod (Monocorophium acherusicum) and bioluminescent bacterium (Vibrio fischeri) in accordance with the Korean Standard Method for Marine Wastes (KSMMW). Nine sites in the East Sea-Byeong, East Sea-Jeong, and Yellow Sea-Byeong areas were sampled from 2016 to 2019. The test results showed that the relative average survival rate (benthic amphipods) and relative luminescence inhibition rate (luminescent bacteria) were below 30%, which were judged to be "non-toxic." However, in the t-test, a total of 12 benthic amphipod samples (6, 1, 1, and 4 in 2016, 2017, 2018, and 2019, respectively) were significantly different (p<0.05) from the control samples. To identify the source of toxicity on benthic amphipods, a simple linear regression analysis was performed between the levels of eight heavy metals (Cr, As, Ni, Cd, Cu, Pb, Zn, and Hg) in sediments and the relative average survival rate. The results indicated that Cr had the highest contribution to the toxicity of benthic amphipods (p = 0.000, R2 = 0.355). In addition, Cr was detected at the highest concentration at the DB-85 station and exceeded the Marine Environment Standards every year. Although the sediments were determined as "not toxic" according to the ecotoxicity criteria of the KSMMW, the results of the statistical significance tests and toxicity identification evaluation indicated that the toxic effect was not acceptable. Therefore, revising the criteria for determining the toxic effect by deriving a reference value through quantitative risk assessment using species sensitivity distribution curves is necessary in the future.
Keywords
Ocean Dumping Site; Sediment Ecotoxicity; Monocorophium acherusicum; Vibrio fischeri; Toxicity Identification Evaluation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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