탁도에 의한 구리ㆍ알킬암모늄화합물계 목재방부제(ACQ)의 농도 예측 = Prediction of Alkaline Copper Quat (ACQ) Wood Preservative Concentration by Turbidity

다국어 초록 (Multilingual Abstract)

The concentration control of wood preservatives is necessary to produce a preservative treated wood having a uniform quality. Concentration measurement method of wood preservatives to be easily used in the field has not been developed yet. This study examined the way to estimate the concentration from turbidity of ACQ wood preservative that can be relatively easily measured by using a portable turbidity meter. The addition of phosphoric acid solution in an alkaline ACQ solution having a very low turbidity is created a suspension of the white substance and the turbidity suddenly increased. The optimum amount of addition of the phosphoric acid solution is until the pH of ACQ solution reaches 7, the turbidity of the ACQ solution reaches maximum value. Excessive addition of the phosphoric acid solution results in a turbidity decrease with acidification of the ACQ solution. Also ACQ solution becomes transparent. The high significance was recognized with positive correlation between the concentration and the turbidity of the ACQ solution. From the t-test, The significant difference between the actually measured concentrations and the concentrations predicted by the regression equation for industrial ACQ solutions was not recognized. Thus, it was possible to know that concentration prediction and control of industrial ACQ solution using the turbidity and a regression equation. Therefore, using the regression equation and turbidity is expected to be able to management the concentration of ACQ solution in the industrial field.

참고문헌 (Reference)

1 Korean industrial standard, "Wood preservatives"

2 American wood protection association, "Standard methods for analysis of waterborne preservatives and fire-retardant formulations"

3 American wood protection association, "Standard for determination of didecyldimethylammonium chloride in ACQ solutions"

4 Notification of national institute of forest science, "Specifications and quality standards of wood products (2015-8). preservative treated wood (annex 2)"

5 Hannouche, A., "Relationship between turbidity and total suspended solids concentration within a combined sewer system" 64 (64): 2445-2452, 2011

6 Michinori, O., "Kagakujiten" Kabushikikaisya Tokyokagakudoujin 1014-, 1994

7 Pavanelli, D., "Indirect methods ot estimate suspended sediment concentration: Reliability and relationship of turbidity and settleable solids" 90 (90): 75-83, 2005

8 Minella, J.P.G., "Estimation suspended sediment concentrations from turbidity measurenents and the calibration problem" 22 : 1819-1830, 2008

9 Holliday, C.P., "Establishing the relationship between turbidity and total suspended sediment concentration" 2003