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ISSN : 1598-5725(Print)
ISSN : 2093-8470(Online)
Journal of Navigation and Port Research Vol.41 No.4 pp.195-206
DOI : http://dx.doi.org/10.5394/KINPR.2017.41.4.195

Comparison of Pipeline and Clamshell Capping Technologies for the Remediation of Contaminated Marine Sediments

Ku Kang․Seong-Gu Hong․Young-Kee Kim․Seong-Jik Park

Abstract

In situ capping technology for marine sediment pollution control has never been applied in South Korea. In this study a pilot project for the capping was carried out in Busan N Harbor. Pipeline and clamshell capping technologies were implemented for the pollution control. Changes of capping shapes, sediment contamination, and the time and costs required for the two constructions were compared. Both the pipeline and clamshell technologies were found to satisfy the target thickness of 50 cm on average. However, the pipeline method did not operate sensitively in terms of change of the sea floor topography, resulting in an uneven shape and a thickness. Organic carbon and ignition loss quite decreased after the pipeline or the clamshell capping while pH showed no significant change. Organic and residual fraction of Cd, Ni, and Zn in the sediments appeared to decrease after all cappings. The pipeline method took a construction time four times as much as the clamshell method. The clamshell method was demonstrated to reduce the construction cost by about 40% compared with the pipeline method. However, a monitoring for all the parameters needs to be conducted at least two years in order to better evaluate an efficiency of the pollution control by these capping constructions.

해양 오염퇴적물 정화를 위한 원통관과 클램쉘을 이용한 피복 기술의

강구․홍성구․김영기․박성직

초록

 

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