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DOI : 10.17640/KSWST.2020.28.4.3 ,    Vol.28, No.4, 3 ~ 15, 2020
Efficiency Evaluation of Organic Dyeing Material Removal in Water by Specimens Mixed with Cement and TiO2 From Sludge
여우석 Wooseok Yeo , 김종규 Jong Kyu Kim
This study investigates the photocatalytic decomposition of Methylene Blue (MB) under sunlight (ultraviolet light) by titanium dioxide produced from sludge called (TFS) compared to the widely used titanium dioxide (P-25). For the experiment, three types of specimen were prepared: 1) cement, 2) cement mixed with TiO2 (P-25) and 3) cement mixed with TFS; and two types of cement were tested for the cement materials: Type 1 normal Portland cement and Ultra rapid hardening cement. The removal rate of MB was identical as 99.2% for TFS and P-25 when Type 1 normal Portland cement was used. However, the removal rates differed as 92% for TFS and 98% for P-25 when Ultra rapid hardening cement was applied. This result shows that TFS possess the photocatalytic efficiency similar to that of P-25. When TFS was mixed as a catalyst, the MB removal rate was increased when Type 1 normal Portland cement was used as a binder compared to when Ultra raid hardening cement was applied. The optimal condition for the synthesis of TFS with Type1 normal Portland cement was determined as mixing ratio of 27.079% with the reaction time of 118.186 minutes. Therefore, it can be concluded that TFS could potentially be applied as a photocatalyst in the field as it shows similar photocatalytic activities of P-25 under ambient sunlight (ultraviolet).
Key Words
Cement, Photocatalysis, Sludge, TiO2, 시멘트, 광촉매반응, 슬러지, 이산화티타늄
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