오염퇴적물 관리방향 및 처리공법

김건하,정우혁,Kim, Geon-Ha,Jeong, Woo-Hyeok 한국지하수토양환경학회 2007 지하수토양환경 Vol.12 No.3

수질오염 총량제가 시행됨에 따라 깨끗한 수자원을 확보하기 위한 오염퇴적물의 관리 및 처리 필요성이 더욱 높아지고 있다. 본 논문에서는 오염퇴적물의 발생원과 오염퇴적물이 수질에 미치는 영향을 살펴보고, 오염퇴적물의 관리방향을 제시하였다. 오염퇴적물을 처리하기 위한 공법으로 준설공법과 자연정화법, 현장고정화/안정화, 생물학적 현장처리, 화학적 현장처리 공법에 대하여 요약 제시하였다. 또한 새롭게 대두되고 있는 캡핑공법을 소개하고, 오염퇴적물 처리를 위한 복합공법의 적용에 대한 개념을 제시하였다. As Total Maximum Daily Load program is being implemented, needs for the management and treatment of contaminated sediment are rising to attain cleaner water resources. In this paper, impacts and management methods of contaminated sediment were reviewed. Remediation technologies for contaminated sediment including dredging, natural attenuation, in situ solidification/stabilization, in situ biological remediation, in situ chemical remediation and capping were reviewed. Integrated remediation scheme was presented as well.

영가철($Fe^0$)을 이용한 퇴적물내 Atrazine의 탈염소화

김건하,정우혁,최승희,Kim, Geon-Ha,Jeong, Woo-Hyeok,Choe, Seung-Hee 한국지하수토양환경학회 2006 지하수토양환경 Vol.11 No.4

농경지에서 부유물질과 결합하여 비점원형태로 발생하는 잔류농약은 하류에 퇴적물로 침전되어 지표수를 오염시킬 수 있다. 이 연구는 트리아진계 제초제인 아트라진이 퇴적물에 포함되어 있는 경우 0가철(Zero-valent Iron, ZVI)을 이용한 탈염소화 반응 속도를 측정하였다. 실험결과 퇴적물의 완충능이 pH를 중성으로 유지시킴으로서 탈염소 반응이 지속됨을 알 수 있었다. 퇴적물에 아트라진을 10, 30, 50 mg Atrazine/L of total sediment로 오염시키고 0가철을 투여하여 아트라진의 농도변화를 측정함으로서 탈염소화 속도를 추정하였다. 탈염소화 속도는 아트라진 초기농도 10 mg/L인 경우 $1.38x10^{-1}/d$, 30 mg/L인 경우 $1.29x10^{-l}/d$, 50 mg/L인 경우 $7.43x10^{-2}/d$이었으며, 초기농도가 50 mg/L이고 영가철을 투입하지 않은 경우 속도상수는 $3.05x10^{-2}/d이었다. 영가철에 의한 아트라진 농도 반감기는 초기 농도 10 mg/L일때 5.03 d, 30 mg/L일때 5.38 d, 50 mg/L일때 9.33 d이었으며, 초기농도가 50 mg/L이고 영가철을 투입하지 않을 경우 22.73 d로 나타났다. Residual pesticides discharged from diffuse sources at agricultural area in association with suspended solid will be settled at downstream, and may degrade surface water quality. This research studied dechlorination kinetic of atrazine, one of triazine-category herbicide, using zero-valent iron (ZVI) in sediment. It can be observed from the experiments that buffer capacity of sediment helped pH maintained beutral, resulted in continuous dechlorination. Sediments were spiked with atrazine at 10, 30, and 50 mg atrazine/L of total sediment for batch experiments. Dechlorination constants were $1.38x10^{-1}/d$ for the initial concentration of 10 mg/L, $1.29x10^{-l}/d$ for 30 mg/L, and $7.43x10^{-2}/d$ for 50 mg/L while dechlorination constants of initial concentration of 50 mg/L without ZVI adding were estimated as $3.05x10^{-2}/d. Half lifes atrazine by ZVI were estimated as 5.03 d fur 10 mg/L, 5.38 d for 30 mg/L, and 9.33 d for 50 mg/L, respectively.

금강유역 비점원에서 발생하는 미생물 오염 및 수질에 대한 영향

김건하 ( Geon Ha Kim ) 한국물환경학회 ( 구 한국수질보전학회 ) 2006 한국물환경학회지 Vol.22 No.3

In order to estimate microbial contaminant discharge from diffuse sources, rainfall runoff was monitored at forestry, agriculture and urban watersheds. Total coliform and E. coli were monitored at the study watersheds as they are regulated by the environmental laws. Concentration and EMC (Event Mean Concentration) of coliform of rainfall runoff at the urban watershed were the highest followed by those from agricultural and forestry watersheds. By monitoring coliform concentrations of overlying water and sediment at five monitoring points in the downstream of the Geum River, average concentration from spring to summer was higher than those values from fall to spring. Coliform concentrations in the pore water were higher compared to those of overlying water and closely related with flow rate of the river.

모바일서비스 진화프레임워크 개발에 관한 연구 -스마트폰 날씨 애플리케이션 개발사례를 중심으로-

김건하 ( Geon Ha Kim ),주상호 ( Sang Ho Joo ),강영식 ( Young Sik Kang ) 한국생산성학회 2012 生産性論集 Vol.26 No.1

We propose a mobile service evolution framework which is composed of 2 factors-the degree of smartization and the outer-dependency of profit. It is a framework that presents 2 x 2 matrix : 4 cells. We decided to apply this framework to weather application on smartphone. And so we made typical profiles for weather application on smartpone, and executed an experiment to test the degree of adoption of mobile service subscribers for the typical profiles of weather application. First, we found that the advertisements tailored by LBS/weather condition would be more effective and efficient than those of the usual banner advertisements in the aspect of CTR. Second, mobile service subscribers were reluctant to buy the goods or services tailored by LBS/weather condition on smartphone, because they did not feel confident to the security system and mobile pay system provide by smartphone. Third, the advertisements both tailored by LBS/weather condition and combined by SNS had lower barrier than the advertisements tailored only by LBS/weather condition to lead to the recommendation and group shopping. We thought that mobile service subscribers would want to share goods or services information with their friends for risk reduction against shopping failure. Fourth, mobile service subscribers had the most adoption rate for the gift-coupon-typed e-commerce service tailored by LBS/weather condition. We thought that they had the tendency to deliver their missing minds to their acquaintances through the gift coupons on smartphone. We thought that they had the tendency to deliver the gift coupons on smartphone their acquaintances in the place of their missing minds toward them.

중성 pH조건에서 철(Fe⁰)을 이용한 Atrazine의 탈염소화

김건하(Geon Ha Kim),정우혁(Woo Hyeok Jeong),최승희(Seung Hee Choe) 大韓環境工學會 2006 대한환경공학회지 Vol.28 No.2

호수의 물 순환이 저니의 인 용출율에 미치는 영향

김건하 ( Geon Ha Kim ),정우혁 ( Woo Hyeok Jeong ),최승희 ( Seung Hee Choi ) 한국물환경학회 2005 한국물환경학회지 Vol.21 No.6

매몰지 생물반응조 개조를 통한 사체의 안정화 촉진

김건하(Geon Ha Kim),전해성(Hae Seong Jeon) 大韓環境工學會 2014 대한환경공학회지 Vol.36 No.10

가축전염병 확산을 방지하기 위하여 조성된 긴급매몰지의 경우 침출수 누출이 확인되면 원형저장조로 이설된 경우가 있는데, 저장조 내 낮은 함수율과 혼합문제로 인해 분해가 거의 이루어지지 않고 있는 실정이다. 본 연구에서는 사체의 안정화를 촉진할 수 있도록 원형저장조를 생물반응조(Bioreactor)로 구조를 변경하였다. 침출수를 재순환하고 미생물을 공급하여 안정화에 필요한 미생물활동을 증가시켰다. 원형저장조 내부 유기물의 변형을 고려한 침하량 모형을 사용하여 예측한 침하량 최종치는 생물저장조 구조 변경 후 5년간 약 30%이었다. Many burial sites were constructed to suppress the spread of foot and mouth disease during outbreak. Defected burial sites were removed when leachate leak is presumed and carcasses were moved to the circular storage tanks. However, carcasses were not decomposed possibly due to low water content, low microbial activities, and poor mixing. In this research, storage tank containing carcasses in it was modified to bioreactor to accelerate stabilization. Liquids with nutrients were added and circulated to maintain the optimum water content while extraneous microorganisms were augmented. Settlement was used as the primary index for assessing stabilization rate, and the consolidation theory was utilized to estimate the expected final settlement. 30% of carcasses is expected to be decomposed and removed from the storage tank for five years of bioreactor operation.

논문 : 합류식 하수관거 월류수의 지표미생물 배출 특성

김건하 ( Geon Ha Kim ) 대한상하수도학회 2006 상하수도학회지 Vol.20 No.4

Combined sewer overflow (CSOs) is a primary diffuse source degrading water quality of urban streams. In this study, CSOs caused by 5 different rainfall events at an urban watershed located in Daejeon city were monitored for the indicator microorganism concentrations. Event mean concentration (EMC) of the indicator microorganisms were: total coliform = 2.46×10(6) CFU/100mL; fecal coliform = 1.01×10(6) CFU/100mL; E. coli = 5.20×10(5) CFU/100mL; and Fecal Streptococci = 6.08×10(5) CFU/100mL. In addition, coliform concentrations were well correlated with suspended solid concentrations and the first flush effects were identified. Settling tests were carried out to estimate removal rate of indicator organisms by sedimentation from CSOs. As microorganisms are discharged in association with suspended solid, ten minutes of settlement can lower 44% of indicator microorganism leading.

금강에 대한 대장균 부하 지속곡선의 개발 및 적용

김건하 ( Geon Ha Kim ),윤재영 ( Jae Young Yoon ) 한국물환경학회 2005 한국물환경학회지 Vol.21 No.5

농지-임야 유역의 비점원 발생 BOD 부하의 추정

김건하 ( Geon Ha Kim ),권세혁 ( Se Hyug Kwon ) 한국물환경학회 2005 한국물환경학회지 Vol.21 No.6