본 연구는 세라믹 압출법을 이용하여 납석기반 세라믹 반응매질을 제조하였다. 납석의 광물학적 특성은 XRD, XRF, DSC-TGA 및 제타전위분석을 실시하였으며, 납석기반의 세라믹 반응매질은 다양한 소성온도범위(500~1,300 ℃)에서 수행하였다. 소성온도가 증가할수록 반응매질의 강도는 증가 하였으나, 비표면적은 감소된다. 온도변화에 따른 납석의 무게손실과 구조변화를 XRD, DSC-TGA 및 SEM 분석을 통해 확인하였으며, 엽납석은 소성온도 1,000 ℃에서 pyrophyllite dehydroxylate로 전이되며, 1,300 ℃에서 뮬라이트와 크리스토발라이트로 상변화가 발생된다. 본 연구를 통해 납석은 투수성반응벽체 적용을 위한 반응매질로서 세라믹 지지체 역할을 수행할 수 있을 것으로 판단된다.

Contaminated water from abandoned mines, non-sanitary landfills, and tunnel excavation flows into rivers via groundwater. These sources of contamination contain significant heavy metals and are discharged without treatment. As contaminated water flows into the river, water quality decreases. Furthermore, water that flows into rivers also contaminates the soil. This causes problems for both the environment and society. However, it is difficult to place water treatment plants at each source of contamination because of problems related to economics, site security, etc. The author has selected permeable reactive barriers (PRBs) to solve these problems. The aim of this study is to develop eco-friendly technology for reuse of waste. In this study, three reacting media were used. The first reacting medium was zero-valent iron (ZVI). ZVI can be used as a PRB and is effective at removing heavy metals. The second medium was steel-making slag. It is suitable for removal of heavy metals because its components include lime and iron oxide. The final reacting medium was bark. The bark is the outer layer of a tree, and consists of dead tree trunk tissue. The chemical structure of bark includes carboxyl and hydroxyl moieties that combine well with heavy metals. In this study, the materials to be removed were heavy metals including arsenic, cadmium, copper, lead, zinc, and nickel. The experiment was carried out for two months using two pilot scale PRBs. ZVI and steel-making slag were placed on the front of the two pilot scale PRBs under the same conditions. Activated carbon and bark were placed on the end of each device. After two months, the experiment showed efficient removal of arsenic and lead. It is possible to reduce the generation of waste by removing heavy metals with waste materials like bark.