양이온 염료인 메틸렌블루의 흡착 능력을 향상시키기 위해 콘크리트에 활성탄 분말을 첨가하거나 실리카 나노입

자를 코팅하여 기능성 콘크리트를 제조하였다. 원활한 흡착을 위해 콘크리트에 혼합되는 폴리스티렌의 양을 조절

하여 시료의 밀도를 변화시켰고, 오염물 내의 시료 부유 거동을 제어할 수 있었다. 오염 수에 가라앉지 않고 콘크

리트 시편이 적절히 부유할 수 있는 폴리스티렌의 적정 투입량을 조절할 수 있었다. 기능성 콘크리트의 활성탄 분

말 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. 활성

탄 분말을 첨가하는 것 외에, 실리카 나노입자를 침전법으로 합성하여 콘크리트에 코팅함으로써 메틸렌블루의 흡

착 능력을 향상시킬 수 있었고, 실리카의 코팅 횟수에 비례하여 유기 염료의 흡착 능력이 증가함을 확인하였다. 실

리카 나노입자와 활성탄 분말이 모두 코팅된 콘크리트는 실리카 나노입자만 코팅된 콘크리트보다 우수한 흡착 능

력을 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.

Functional concrete, Activated carbon powder, Adsorption, Silica sol

1. Kim, B. I., Oh, S. K., and Seo, S. H., “A Study on the Development
of Light Emotion Friendly Concrete Block for Efficient
Application of Titan-oxide photocatalyst,” J. Korea Inst. Struct.
Maint. Insp., 23(6), 120-131(2019).
2. Kim, H. R., “A Study on the Efficiency of Concrete to Absorb
Hazardous Substances and to Emit Fragrance,” M.S Dissertation,
Chungju National University(2010).
3. Jung, Y. W., Chang, C. H., and Kim, J. K., “Manufacture and Characteristics
of Concrete Sidewalk Blocks Using Photocatalyst
Agent,” J. Rec. Const. Resources., 7(4), 423-430(2019).
4. Yang, I. H., Park, J. H., Park, H. W. and Jung, H. W., “Self-Cleaning
of Mortar Mixed with Photocatalyst by Using Methylene Blue
Solution,” J. Rec. Const. Resources., 8(3), 356-364(2020).
5. Kim, H. J., Kim, Y. K. and Kwon, S. J., “Evaluation of Durability
and Self-clearing in Concrete Impregnated with Photocatalystcolloidal
Silica,” J. Korea Inst. Struct. Maint. Insp., 22(5), 47-54
(2018).
6. Park, G. J., Park, J. J., Kwak, J. W. and Kim, S. W., “Research
on the Efficient Manufacturing Method of Photocatalyst Concrete
according to the Type and Mixing Ratio of Photocatalyst,”
J. Korea Inst. Struct. Maint. Insp., 23(4), 69-77(2019).
7. Faraldos, M., Kropp, R., Anderson, M. A. and Sobolev, K.,
“Photocatalytic Hydrophobic Concrete Coatings to Combat Air
Pollution,” Catal. Today, 259(1), 228-236(2016).
8. Boonen, E. and Beeldens, A., “Photocatalytic Roads: from Lab
Tests to Real Scale Applications,” Eur. Transp. Res. Rev., 5, 79-
89(2013).
9. Kim, S. S., Lee, J. B., Ko, J. S. and Kim, I. K., “A Study on the
Nano Silica-Sol Coating for Improving Performance of Recycled
Aggregate,” J. Korea Inst. Struct. Maint. Insp., 17(4), 84-90(2013).
10. Woo, J. K., Hong, S. H., Jun, K. B. and Ryu, H. G., “A Study on
the Development of Friendly Environment Mortar by Using Activated
Carbon as Fine Aggregate,” J. Korea Inst. Build. Constr.,
6(2), 105-109(2006).
11. Park, C. B., Kim, Y. H., Jun, Y. B., Kim, J. H. and Ryu, D. H.,
“Durabilities of Lightweight Aggregate Concrete and Natural
Aggregate Concrete,” J. Korea Concr. Inst., 33(3), 227-234(2021).
12. Sim, J. I. and Yang, K. H., “Influence of Specimen Geometries
on the Compressive Strength of Lightweight Aggregate Concrete,”
J. Korea Concr. Inst., 24(3), 333-340(2012).
13. Lee, J. M., Kim, H. H. and Chung, M. K., “Adsorption of Methylene
Blue and Phenol from an Aqueous Solution on to Activated
Carbon,” Applied Chemistry, 6(2), 951-954(2002).
14. Kam, S. K., You, H. N. and Lee, M. G., “Adsorption Characteristics
of Methylene Blue from Aqueous Solution According to
Physical and Surface Properties of Activated Carbons,” J. Environ.
Sci. Int., 23(11), 1821-1826(2014).
15. Kang, S. G., “A study on Characteristics of the Methylene Blue
dye Adsorption in Wastewater Using Waste Coffee,” M.S Dissertation,
Ewha Womans University(2020).
16. Li, H., Liu, L., Cui, J., Cui, J., Wang, F. and Zhang, F., “Highefficiency
Adsorption and Regeneration of Methylene Blue and
Aniline Onto Activated Carbon from Waste Edible Fungus Residue
and Its Possible Mechanism,” RSC Adv., 10, 14262-14273
(2020).
17. Yun, M. R., “A Study on the Adsorption of Heavy Metals by
Impregnated Active Carbons,” M.S Dissertation, Chosun University(
2006).
18. Ju, H. S., Lee, S. I., Lee, Y. S. and Ahn, H. G., “Surface Midification
of Activated Carbon by Acid Treatment and Adsorption
Property of Heavy Metals,” Applied Chemistry, 4(1), 173-176(2000).
19. Parida, S. K., Dash, S., Patel, S. and Mishra, B. K., “Adsorption
of Organic Molecules on Silica Surface,” Adv. Colloid Interface
Sci., 121(1-3), 77-110(2006).
20. Heo, G. H., Song, K. C., Park, J. G., Park, J. H. and Jun, H. M.,
“Effect of Mechanical Properties of SiO2 Coated Carbon Fiber
Reinforced Mortar Composites,” J. Korea Concr. Inst., 32(1), 65-
76(2020).
21. Kim, Y. H., Jeaong, C. S., Song, M. S. and Lee, W. G., “The
Effects of Silica Sol and Modified Latex on the Concrete SurfaceProtection Cement Mortar for Improvement of Durability of
Concrete,” J. Korea Acad.-Ind. Coop. Soc., 20(12), 715-722(2019).
22. Faiz Shaikh, Vimal Chavda, Naji Minhaj, and Hasan S. Arel,
“Effect of Mixing Methods of Nano Silica on Properties of Recycled
Aggregate Concrete,” Struct. Concr., 19(2), 387-399(2017).
23. Ruth Ellerbrock, Mathias Stein, and Jorg Schaller, “Comparing
Amorphous Silica, Short-range-ordered Silicates and Silicic Acid
Species by FTIR,” Sci. Rep., 12(1), 11708(2022).
24. Cho, J.-S., Waetzig, G. R., Udayakantha, M., Hong, C. Y. and
Banerjee, S., “Incorporation of Hydroxyethylcellulose-Functionalized
Halloysite as a Means of Decreasing the Thermal Conductivity
of Oilwell Cement,” Sci. Rep., 8(1), 16149(2018).
25. Innocenzi, P., “Infrared Spectroscopy of Sol–gel Derived Silica-based
Films: a Spectra-microstructure Overview,” J. Non-Cryst. Solids,
316(2-3), 309-319(2003).