생태와 환경 Vol. 52 No. 3 (p.179-191)

|Original article|
산업단지 유역 하천수와 퇴적물 내 중금속 오염도 평가 및 기원 추적 연구

Assessment of Contamination and Sources Identification of Heavy Metals in Stream Water and Sediments around Industrial Complex.
키워드 :
dissolved metal,particulate metal,stream sediment,heavy metal,pollution

목차

Abstract
서 론
재료 및 방 법
   1. 시료채취
   2. 중금속 분석
   3. 중금속 오염도 및 위해성 평가
결과 및 고찰
   1. 하천수 용존성/입자성 중금속 농도 및 공간분포 특성
   2. 하천 퇴적물 중금속 농도 및 분포특성
   3. 금속 오염도 및 위해성 평가
적 요
REFERENCES

초록

Heavy metals in stream water and sediments around industrial complex were studied in order to assess the contamination and to identify the potential source of metals. High variability has been observed for both dissolved and particulate phases in stream water with coefficient of variation (CV) ranging from 1.3 to 2.8. The highest metal concentrations in both phases were observed in Gunja for Ni and Cu, in Jungwang for Zn and Pb and in Shiheung for Cd, respectively. These results indicate that the different metal sources could be existing. The concentrations of the heavy metals in sediments decreased in the order of Cu>Zn>Pb>Cr>Ni>As>Cd>Hg, with mean of 2,549, 1,742, 808, 539, 163, 17.1, 5.8, 0.07 mg kg-1, respectively. Mean of metal concentrations (except for As) in sediments showed the highest values at Shiheung stream comparing with other streams. In sediments, the percent exceedance of class II grade that metal may potentially harmful impact on benthic organism for Cr, Ni, Cu, Zn, Cd, Pb was about 57%, 62%, 84%, 60%, 68%, 81% for all stream sediments, respectively. Sediments were classified as heavily to extremely polluted for Cu and Cd, heavily polluted for Zn and Pb, based on the calculation of Igeo value. About 59% and 35% of sediments were in the categories of “poor” and “very poor” pollution status for heavy metals. Given the high metal concentrations, industrial wastes and effluents, having high concentrations of most metals originated from the manufacture and use of metal products in this region, might be discharged into the stream through sewer outlet. The streams receive significant amounts of industrial waste from the industrial facilities which is characterized by light industrial complexes of approximately 17,000 facilities. Thus, the transport of metal loads through streams is an important pathway for metal pollution in Shihwa Lake.