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Articles in press
유기 염료의 제거를 위한 기능성 콘크리트의 제조
Fabrication of Functional Concrete for Removal of Organic Dye from Waste Water
Yea-Young Lee1
Jea-Hun Chung1
Minjun Lee1
Sohyeon Park1
Young-Sang Cho1†
1Tech University of Korea Chemical Engineering and Biotechnology, 1Tech University of Korea Chemical Engineering and Biotechnology, 1Tech University of Korea Chemical Engineering And Biotechnology
In Press, Journal Pre-proof, Available online 1 February 2025
Abstract
양이온 염료인 메틸렌블루의 흡착 능력을 향상시키기 위해 콘크리트에 활성탄 분말을 첨가하거나 실리카 나노입자를 코팅하여 기능성 콘크리트를 제조하였다. 원활한 흡착을 위해 콘크리트에 혼합되는 폴리스티렌의 양을 조절하여 시료의 밀도를 변화시켰고, 오염물 내의 시료 부유 거동을 제어할 수 있었다. 오염수에 가라앉지 않고 콘크리트 시편이 적절히 부유할 수 있는 폴리스티렌의 적정 투입량을 조절할 수 있었다. 기능성 콘크리트의 활성탄 분말 함량이 증가함에 비례하여 메틸렌블루의 흡착 능력이 증가되었으며, 활성탄을 산 처리하여 기능성 콘크리트를 제작할 경우, 산 처리하지 않은 기존의 활성탄 첨가 콘크리트보다 우수한 흡착 능력이 얻어짐을 확인하였다. 활성탄 분말을 첨가하는 것 외에, 실리카 나노입자를 침전법으로 합성하여 콘크리트에 코팅함으로써 메틸렌블루의 흡착 능력을 향상시킬 수 있었고, 실리카의 코팅 횟수에 비례하여 유기 염료의 흡착 능력이 증가함을 확인하였다. 실리카 나노입자와 활성탄 분말이 모두 코팅된 콘크리트는 실리카 나노입자만 코팅된 콘크리트보다 우수한 흡착 능력을 나타내었다.
In this article, functional concrete samples were fabricated by incorporating activated carbon powder or by coating with silica nanoparticles to study the adsorption capacity of the cationic dye, methylene blue. To avoid the concrete samples from being settled down, the floating behavior of the samples in waste water could be controlled by adjusting the amount of polystyrene mixed in the concrete to change density of the samples. In addition to activated carbon powder, silica nanoparticles were synthesized by precipitation method for coating of concrete to improve the adsorption capacity of the samples. Conventional concrete samples without any additive materials showed very low adsorption capacity of methylene blue. However, functional concrete samples containing activated carbon or silica particles demonstrated significantly superior adsorption capacity of the organic dye. The adsorption of methylene blue could be increased by increasing the amount of activated carbon powder in the concrete samples. Acid-treated activated carbon, with developed pore structure, enhanced higher adsorption capacity compared to untreated activated carbon after incorporating in concrete samples. Additionally, silica-coated concrete showed improved adsorption capacity after repeated coatings and enhanced mechanical strength. Concrete samples coated with both silica sol and activated carbon powder showed enhanced adsorption capacity compared to concrete specimen coated with only silica nanoparticles.
