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저수지 퇴적물에서 질소, 인 및 유기물질 용출차단을 위한 활성탄과 폐콘크리트의 피복재로서적용

Application of Activated Carbon and Crushed Concrete as Capping Material for Interrupting the Release of Nitrogen, Phosphorus and Organic Substance from Reservoir Sediments

김원재|강구|박성직
한국농공학회 (The Korean Society Of Agricultural Engineers)|2016.03|한국농공학회논문집 (Journal of the Korean Society of Agricultural Engineers)|제58권 제2호|pp. 1-9

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참고문헌

키워드

phosphorusnitrogenreservoir contaminated sedimentin-situ cappingchemical oxygen demand
주제분류농학

초록

This study aims to assess the effectiveness of activated carbon (AC) and crushed concrete (CC) as capping material to block the release of nitrogen,phosphorus, and organic substance from reservoir sediments. The efficiency of AC and CC as capping material was evaluated in a reactor in which a 1or 3 cm thick layer of capping materials was placed on the sediments collected from Mansu reservoir in Anseong-city. Dissolved oxygen (DO)concentration , total nitrogen (T-N), total phosphorus (T-P), and chemical oxygen demand (COD) concentration in reservoir water above the uncappedsediments and capping material were monitored for 45 days. The release rate of T-N was in the following increasing order: AC 3 cm (1.18 mg/m2·d) <CC 1 cm (2.66 mg/m2·d) < AC 1 cm (2.94 mg/m2·d) < CC 3 cm (3.42 mg/m2·d) < uncapped (4.59 mg/m2·d). The release rate of T-P was in the followingincreasing order: AC 3 cm (0 mg/m2·d) ≊ CC 3 cm (0 mg/m2·d) < CC 1 cm (0.03 mg/m2·d) < AC 1 cm capped (0.07 mg/m2·d) < uncapped (0.24mg/m2·d). The release of nitrogen and phosphorus were effectively blocked by AC capping of 3 cm thickness, and CC capping of 3 cm thicknesseffectively controlled the release of phosphorus. The order of increasing COD release rate was as follows: AC 3 cm (0 mg/m2·d) ≊ CC 3 cm (0 mg/m2·d)< CC 1 cm (5.03 mg/m2·d) < AC 1 cm (7.28 mg/m2·d) < uncapped (10.05 mg/m2·d), indicating that AC and CC capping effectively interrupted the releaseof organic contaminants from the sediments. It was concluded that AC and CC could effectively block the release of T-N, T-P and COD release fromcontaminated reservoir sediments.

Abstract

This study aims to assess the effectiveness of activated carbon (AC) and crushed concrete (CC) as capping material to block the release of nitrogen,phosphorus, and organic substance from reservoir sediments. The efficiency of AC and CC as capping material was evaluated in a reactor in which a 1or 3 cm thick layer of capping materials was placed on the sediments collected from Mansu reservoir in Anseong-city. Dissolved oxygen (DO)concentration , total nitrogen (T-N), total phosphorus (T-P), and chemical oxygen demand (COD) concentration in reservoir water above the uncappedsediments and capping material were monitored for 45 days. The release rate of T-N was in the following increasing order: AC 3 cm (1.18 mg/m2·d) <CC 1 cm (2.66 mg/m2·d) < AC 1 cm (2.94 mg/m2·d) < CC 3 cm (3.42 mg/m2·d) < uncapped (4.59 mg/m2·d). The release rate of T-P was in the followingincreasing order: AC 3 cm (0 mg/m2·d) ≊ CC 3 cm (0 mg/m2·d) < CC 1 cm (0.03 mg/m2·d) < AC 1 cm capped (0.07 mg/m2·d) < uncapped (0.24mg/m2·d). The release of nitrogen and phosphorus were effectively blocked by AC capping of 3 cm thickness, and CC capping of 3 cm thicknesseffectively controlled the release of phosphorus. The order of increasing COD release rate was as follows: AC 3 cm (0 mg/m2·d) ≊ CC 3 cm (0 mg/m2·d)< CC 1 cm (5.03 mg/m2·d) < AC 1 cm (7.28 mg/m2·d) < uncapped (10.05 mg/m2·d), indicating that AC and CC capping effectively interrupted the releaseof organic contaminants from the sediments. It was concluded that AC and CC could effectively block the release of T-N, T-P and COD release fromcontaminated reservoir sediments.

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