제련소 주변 납 오염 현장토양의 위해성 저감을 위한 토양 안정화 평가

여인홍 ( In-hong Yeo ),장윤영 ( Yoon-young Chang ) 한국환경영향평가학회 2021 환경영향평가 Vol.30 No.4

본 연구에서는 제련소 주변 납 오염 현장 토양의 위해성 저감을 위한 안정화 적용 효과를 알아보고자 대표적인 상업용 안정화제를 적용 후 안정화 전후의 토양 중 납의 용출 안정성을 TCLP (Toxic Characteristic Leaching Procedure)와 SPLP (Synthetic Precipitation Leaching Procedure) 용출시험을 통해 평가하였으며, 안정화 후 토양내 납의 존재형태 변화를 연속추출(sequential extraction procedure)분석을 통하여 파악하였다. 중금속 오염 토양 안정화 성능을 보유하고 있으며 대량으로 공급이 용이한 안정화제인 석회석, AC-2 (Amron), Metafix (Peroxychem)을 후보로 선정하였다. XRD 분석 결과 AC-2는 CaCO₃, MgO의 결정성을 가지고 있었으며, Metafix는 Fe₇S₈의 결정성을 보유하는 것으로 확인되었다. 안정화 후 토양의 SPLP 용출 시험에서는 대부분의 모든 안정화제 적용 조건에서 국내 환경부 먹는물 기준을 만족하였으며 TCLP 용출시험결과에서는 77.0%의 높은 안정화 효율을 보여주었다. AC-2 4%와 Metafix 4% 적용에서 SPLP 용출액 중 납의 농도를 검출 한계치 이하로 저감되었으며 TCLP 기준 안정화 효율이 90% 이상인 것으로 확인되었다. 연속추출 결과 Metafix 적용 토양은 이동성이 높은 1, 2단계의 분획 비율이 감소하고 가장 안정한 5단계의 분획 비율이 증가되는 것으로 나타났다. 본 연구의 결과를 종합하였을 때 안정화 효과가 높은 순서는 Metafix>AC-2>석회석인 것으로 판단된다. In this study, to investigate the effect of stabilization of Pb-contaminated soil near a smelter site for the reduction of environmental risk of Pb leaching, commercial stabilizers were amended with the Pb-contaminated soil and evaluated leaching characteristics of Pb in soil by TCLP and SPLP leaching test. Also, performing sequential extraction procedure speciation of Pb in the amended soil was investigated. Limestone, AC-2 (Amron), Metafix (Peroxychem) that possess stabilization performance towards heavy metal in soil and mass production is available were selected as candidates. AC-2 contained a CaCO₃ and MgO crystalline phase, while Metafix had a Fe₇S₈ crystalline phase, according to XRD studies. Pb content in SPLP extract was lower than the South Korean drinking water standard for Pb in groundwater at 4% AC-2 and Metafix treatment soil, and TCLP-based stabilization effectiveness was more than 90%. The findings of the sequential extraction method of soil treated with Metafix revealed that fractions 1 and 2 of Pb, which correspond to relatively high mobility and bioavailable fractions, were lowered, while the residual fraction (fraction 5) was raised. As a consequence, the order of performance for Pb stabilization in polluted soil was Metafix>AC-2>limestone.

콘텐츠 광고의 트랜스 커뮤니케이션 연구

김종민(Kim, Jong Min),여인홍(Yeo, In Hong) 한국디지털디자인협의회 2015 디지털디자인학연구 Vol.15 No.1

하루가 다르게 패러다임이 바뀌고 있는 광고시장의 중심엔 늘 콘텐츠라는 용어가 빈번하게 사용되어지고 있다. ‘콘텐츠 광고’라는 용어 또한 귀에는 익숙하지만 명확하게 정의 내리기에는 모호함이 남아있다. 본 논문은 융합과 소통이 화두인 최근 광고 시장 속에서 새롭게 스며들고 있는 콘텐츠 광고를 정의하고 그 구조를 알아보는 탐색적 논문이다. 연구 방법은 우선 콘텐츠 광고를 정의 내리고, 콘텐츠 광고의 커뮤니케이션 방식을 살펴보았으며, 2014년 Canne Creative Award 우수작품을 중심으로 콘텐츠 광고 안에서의 콘텐츠 유형과 특징을 연구하였다. 연구 결과, 콘텐츠 광고의 커뮤니케이션 방식은 Awareness-Play-Transfer 의 과정을 거치게 된다. 특히, Awareness 와 Play 과정에서 소비자와의 협업(Co-creation)과 재생산(Reproduction)을 반복하며 브랜드를 전이(Transfer)한다 (Branded). 또한, 콘텐츠 광고에서 활용되는 콘텐츠의 유형은 크게 기술, 정보, 바이럴, 공익으로 나눌 수 있었고, 하나의 콘텐츠 광고 안에서 다른 유형들이 서로 Transfer 되면서 시너지 효과를 보이고 있었다. 즉, 콘텐츠 광고에서의 전이는 콘텐츠간에도 일어나고 소비자와의 관계에서도 일어나며, 결과적으로 소비자와 브랜드 사이에서 일어나는 Trans Communication 과정임을 확인할 수 있었다. In the center of advertising market in where the paradigm changes everyday, the term called content is frequently being used. ‘Contents Advertisement’ is also a familiar term, however, it is vague to give a clear definition. This study is an exploratory research to examine the structure of and define the Contents Advertisement, a new kind of advertisement in the recent advertising market where the convergence and communication are hot issue. First of all, we defined the Contents Advertisement and examine its communication methods. Then we studied the types and characteristics of contents in the Contents Advertisement targeting the prestigious works received 2014 Canne Creative Award. The result showed that the communication of Contents Advertisement went through the process of Awareness, Play and Transfer in order. Especially, a brand was transferred through the repetitive co-creation with the consumers and reproduction in the awareness and play process. In addition, the types of contents used in the Contents Advertisement were roughly categorized into four: technology, information, viral and public interest. These different types of contents were having synergy effect by transferring in one contents advertisement. In other words, we could verify that the transference in the Contents Advertisement is a general trans communication process between the contents and contents, contents and consumers and finally consumers and brand.

시공간적 수질변동 분석을 통한 유역관리방안

김지연 ( Ji-yeon Kim ),여인홍 ( In-hong Yeo ),김용성 ( Yong-sung Kim ),이정현 ( Jung-hyun Lee ) 한국수처리학회(구 한국수처리기술연구회) 2021 한국수처리학회지 Vol.29 No.2

The objective of this study was to analyze long term temporal trends of water chemistry and spatial heterogeneity for 8 sampling sites of Geum-River watershed using water quality dataset during 2005~2009. The water quality, based on multi-parameters of biochemical oxygen demand (BOD), total nitrogen (TN), and total phosphorus (TP), largely varied depending on the landuse patterns, years and seasons. The characteristics of water quality in the upper regions showed good grade(BOD<3 mg/L) in the Geum river kongju. The resulted in the inflow of domestic, industrial, and livestock wastewaters not adequately treated by wastewater treatment systems. The characteristics of water quality in the upper regions showed <0.9 mg/L BOD) in the yongdam dam and daecheong dam. The high level of COD resulted in the inflow of untreated sewage and the effluent from Wastewater treatment plant into the water body in the river basin. For TN and TP concentrations ranging from 4.21 mg/L to 9.12 mg/L and 0.03 mg/L to 0.15 mg/L, respectively, and the nutrients showed large longitudinal gradients between the upper and lower reach. This resulted in the inflow of domestic, industrial and livestock wastewater not adequately treated by wastewater treatment systems.

생물입상활성탄과 분리막 시스템에 의한 호소수중의 미량오염물질 제거

김지연 ( Ji-yeon Kim ),여인홍 ( In-hong Yeo ),현길수 ( Kil-soo Hyun ) 한국수처리학회(구 한국수처리기술연구회) 2020 한국수처리학회지 Vol.28 No.6

Biological granular activated carbon (BAC) bed has been applied to remove a micropollutant in the surface water being used as water supply source. Membrane filtration (MF) has also been introduced water treatment plant to provide better quality drinking water by removing bacteria, viruses, microorganisms as well as particulate and organic matter. This study aims to investigate the effect of BAC biofiltration as a pretreatment before MF processes and evaluate the performance of BAC/MF systems for the treatment of lake water. Applied filtration rates during this experiment were <100 m/d for BAC and 0.5 ㎥/㎡.d for MF. Influent concentration were on humic acid <10 mg/L, turbidity <100 NTU, UV₂₅₄ < 0.250 cm^-1, dissolved organic carbon (DOC) < 9.7 mg/L, d respectively. As a result, both BAC bed and BAC/MF system achieved more than 90% efficiency in removing turbid and organic matters corresponding to UV₂₅₄ and DOC. This indicates that the biofiltration of BAC bed was considerably effective for reducing foulants. The transmembrane pressure (TMP) at increased MF rates was in proportion to the increased humic acid rates in the range of 2 to 10 mg/.L These results indicate that the addition of a BAC bed prior to the membrane filtration process is necessary for cost-effective lake water treatment due to both efficient reductions of geosmin and 2-MIB as well as micropollutants and membrane fouling mitigation due to reduction of the TMP. Silt density index(SDI) were found to be one of the most effective and convenient variables of sludge to evaluate sludge properties and membrane fouling, and an empirical relationship between SDI and membrane permeability was proposed for effectively predicting membrane fouling in an MF and combined MF with conventional treatment processes at high and different turbidity and DOC concentrations.

OECD 농약관리정책

여인홍 한국환경독성학회 1997 환경독성보건학회지 Vol.12 No.1