EQCN을 이용한 금속표면의 바이오화울링 형성에 대한 정량적 고찰

다국어 초록 (Multilingual Abstract)

It is known that biofouling behavior is related to the physicochemical variables such as fluid velocity, solid surface condition, temperature, PH value, oxygen and nutrient concentration. The surface characteristic of reservoir materials is one of the major factors determining the deposition rate of living organisms. The initial biofouling behavior was investigated by measuring the mass of bacterial deposition on the various metal surfaces immersed in the stationary solution and the antibiofouling effect of ultra-violet light was also examined on titanium surface. We used three types of bacteria which can be encountered easily in the water treatment systems such as water tank or heat exchanger. These bacteria were cultured up to maximum contents(over 10 bacteria/ml) and the deposition degrees of the bacteria on the Au, Cu, Ni, Cr, and Ti surfaces were measured using an electrochemical quartz crystal nanobalance(EQCN). Resolution limit obtained for the EQCN was about 0.1 ng. The amounts of Klebsiella aerogenes and Escherichia coli deposited on Au surface used as control group, were remarkably higher than those adhered on the other metal surfaces. However, the mass of the Pseudomonas fluorescens adhered on Ti surface was about 1.1, 1.4, 1.8 and 2.5 times greater than those deposited on Au, Cu, Cr and Ni surfaces respectively. In general, Au and Ti which are known as bioinert materials, showed high bacteria deposition behavior which is closely associated with the initial biofouling formation. The bacteria deposited on the Ti surface were removed gradually by irradiation of ultra-violet light. The antibiofouling effect of Cr, Ni, Cu may be due to the toxic reaction occurring at the interfaces between the solution and the metal surfaces.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 실험장치 및 방법
• 3. 실험결과 및 고찰
• 4. 결론
• 후기
• 참고문헌