신보활석광산 주변에 형성된 우라늄 이상치가 지표수계 환경에 미치는 영향

• 발행기관: 대한자원환경지질학회
• 저자명: 나춘기 정재일
• 간행물 정보: 『자원환경지질』33권 4호, 261~271쪽, 전체 11쪽
• 주제분류: 자연과학 > 지질학
• 파일형태: PDF
• 발행일자: 2000.08.30

영문 초록

In order to evaluate the environmental impact of U anormaly in the drainage system around the Shinbo talc mine area, U contents, their distribution patterns, bioaccumulation and α-radioactivity in stream water, stream sediments and aquatic organisms were investigated. The U contents of stream water attenuated with increasing distance from the mine area. The same attenuation pattern is shown in stream sediments from mine to 0.75 ㎞ downstream, although these contain highly enriched U contents (24∼83 ㎎/㎏) comparing with the international average concentration of surface soils (0.79∼11 ㎎/㎏). However, U content increases aburptly in sediment at 1.5 ㎞ downstream, probably dut to detrital migration and rediposition of U enriched sediments. Futhermore, enriched U in downstream sediments occur in high proportions of carbonate and Fe-Mn oxide bounded forms, which show high potential of a secondary pollution source. for aquatic organiosms, bio accumulation degree of U are in the order: aquatic larvae>black snail>mountain frog>crawfish. Cultured trout by the U enrich groundwater (387 μg/ℓ) shows U accumulation in the part of branchia (CRs 5.25) and bones (CRs 11.2) but not in flesh (CRs 0.03). Total α-radioactivity have been measured in the level as 0.47 nCi/l for groundwater, 2.94∼18 nCi/㎏ㆍDW for organisms and 93∼328 nCi/㎏ㆍDW for sediments.

키워드

신보활석광산 우라늄 지표수계 환경 하천수 방사성 원소 농축