Environmental assessment of contaminated marine sediments treated with solidification agents: Directions for improving environmental assessment guidelines SCIE SCOPUS

Cited 5 time in WEB OF SCIENCE Cited 5 time in Scopus
Title
Environmental assessment of contaminated marine sediments treated with solidification agents: Directions for improving environmental assessment guidelines
Author(s)
Gang, Yehui; Won, Eun-Ji; Ra, Kongtae; Choi, Jin Young; Lee, Kyun-Woo; Kim, Kyoungrean
KIOST Author(s)
Gang, Ye Hui(강예희)Ra, Kong Tae(나공태)Choi, Jin Young(최진영)Lee, Kyun Woo(이균우)Kim, Kyoung Rean(김경련)
Publication Year
2018-08
Abstract
Treatment of dredged materials is a critical issue, since management and disposal of these products requires considerable investment of monetary resources, time, and space. The high concentration of pollutants in dredged materials, along with high water content and many fine particles make recycling these materials particularly difficult. In order to solve this problem, solidification/stabilization has been considered as a potentially viable solution for recycling dredged marine sediments. However, there are currently no guidelines that address potential biological and environmental impacts. To evaluate the stability of treated materials and their biological impacts, dredged marine sediments, which were polluted with heavy metals, were treated by solidification/stabilization using two different solidifying agents. To assess potential impacts, toxicity characteristic leaching procedures (TCLP, USEPA) and a bioassay (with the rotifer, Brachionus sp.) were performed with treated materials. In a TCLP test, we found that treatment with a solidification agent decreased the leaching concentration of heavy metals from sediment compared to the control. The rotifer bioassay showed no change in the survival rate during 24 h of exposure to both agents. However, survival differed between the two agents after 48 h of exposure. Screening physiological status using gene expression, showed that oxidative stress genes were significantly altered. These results suggest that more studies are needed to provide guidelines for deciding the usability of treated materials created by the solidification or stabilization of dredged materials.
ISSN
0141-1136
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2101
DOI
10.1016/j.marenvres.2018.05.011
Bibliographic Citation
MARINE ENVIRONMENTAL RESEARCH, v.139, pp.193 - 200, 2018
Publisher
ELSEVIER SCI LTD
Subject
DREDGED SEDIMENTS; FLY-ASH; MECHANICAL-BEHAVIOR; MONOGONONT ROTIFER; BENEFICIAL REUSE; PORTLAND-CEMENT; HEAVY-METALS; EXPRESSION; STABILIZATION; TOXICITY
Keywords
Marine sediments; Beneficial use; Solidification agents; Rotifer; Environmental assessment
Type
Article
Language
English
Document Type
Article
Publisher
ELSEVIER SCI LTD
Related Researcher
Research Interests

Remediation of marine sediments,Development of remediation technologies,Coastal marine environment,해양퇴적물 정화,정화 기술 개발,연안 환경

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