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ISSN : 1229-3431(Print)
ISSN : 2287-3341(Online)
Journal of the Korean Society of Marine Environment and Safety Vol.25 No.7 pp.914-919
DOI : https://doi.org/10.7837/kosomes.2019.25.7.914

Variation in the Properties of Contaminated Coastal Sediment with the Mixing of Alkaline Industrial By-product

Seongsik Park*,Hee-Eun Woo**,In-Cheol Lee***,Do-Hyung Kim****,Jeonghwan Park*****,Jinsoo Kim******,Kyunghoi Kim***†
*, ** Graduate Student, Department of Ocean Engineering Pukyong National University Busan 608-737, Korea
*** Professor, Department of Ocean Engineering Pukyong National University Busan 608-737, Korea
**** Professor, Department of Aquatic Life Medicine Pukyong National University Busan 608-737, Korea
***** Professor, Department of Marine Bio-materials and Aquaculture Pukyong National University Busan 608-737, Korea
****** Legislative Researcher, Department of Land, Transport and Maritime Affairs Team National Assembly Research Service Seoul, Korea
* First Author : tjdtlr2565@hanmail.net, 051-629-6583
Corresponding Author : hoikim@pknu.ac.kr, 051-629-6583

Abstract

A mesocosm experiment considering water exchange was conducted to evaluate the change in the properties of contaminated coastal sediment. The contaminated coastal sediment sample was prepared by mixing with granulated coal ash(GCA), which is an alkaline industrial by-product. During one month of observation time, the phosphate concentration of the GCA sample case was measured to be 19.0 and 0.4 mg/L lower than that of the control sample at the pore water and overlying water, respectively. The hydrogen sulfide concentration of the GCA sample case was 5.0 mg/L, which is significantly lower than that of the control sample(112.5 mg/L). Further addition of GCA in the sediment reduced the concentrations of phosphate and hydrogen sulfide, and could enhance the adsorption reaction, when compared to the sediment without GCA. The dissolved oxygen concentration in the overlying water of the GCA sample was measured to be 3.47 mg/L higher than the control sample. From the above results, we confirmed that GCA is an effective material for reducing pollutants in coastal sediment.

알칼리성 산업부산물의 혼합에 따른 연안 오염퇴적물의 성상 변화

박성식*,우희은**,이인철***,김도형****,박정환*****, 김진수******,김경회***†
*, ** 부경대학교 해양공학과 대학원생, *** 부경대학교 해양공학과 교수, **** 부경대학교 수산생명의학과 교수,***** 부경대학교 해양바이오신소재학과 교수, ****** 국회입법조사처 국토해양팀 입법조사관

초록

알칼리성 산업부산물의 혼합에 따른 연안 오염퇴적물의 성상 변화를 평가하기 위해 해수 교환을 고려한 mesocosm 실험을 수행 하였다. 실험시작 1개월 후 실험구의 인산인 농도는 대조구 대비 간극수와 직상수에서 각각 19.0, 0.4 mg/L 낮게 검출되었다. 이는 GCA에서 용출된 칼슘이온과 인산인의 흡착반응을 통한 간극수 내의 인 고정 및 직상수로의 용출 억제에 따른 결과로 판단된다. 실험구의 간극수 내 황화수소 농도는 5.0 mg/L로 112.5 mg/L인 대조구에 비해 매우 낮게 나타났으며, 실험구 직상수의 DO 농도는 대조구에 비해 3.47 mg/L 높게 나타났다. 이상의 결과로부터 알칼리성 산업부산물인 GCA는 연안 오염퇴적물의 개선에 효과적인 재료임을 확인하였다.

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