CAJ | 학술논문

采用改进的平面传感膜制备方法,建立应用于淡水/沉积物模拟体系的溶解氧(DO)二维分布监测系统。结果表明：采用物理包埋法将荧光指示剂三(4,7-联苯-1,10-邻菲啰啉)二氯化钌固定于乙基纤维素膜上,制备的DO 平面传感膜荧光强度随DO 质量浓度的增加而减小,符合荧光淬灭的 Stern-Volmer 方程,具有 DO 响应范围宽(0~20 mg/L)、响应速度快(<60 s)、准确性高、可逆性和稳定性好等优点；在生物扰动存在下,沉积物 DO 变化较小,对上覆水DO 影响较大,这是由于物理混合和氧化还原等多种机制综合作用所致,生物扰动将直接或间接影响这些作用。
채용개진적평면전감막제비방법,건립응용우담수/침적물모의체계적용해양(DO)이유분포감측계통。결과표명：채용물리포매법장형광지시제삼(4,7-련분-1,10-린비라람)이록화조고정우을기섬유소막상,제비적DO 평면전감막형광강도수DO 질량농도적증가이감소,부합형광쉬멸적 Stern-Volmer 방정,구유 DO 향응범위관(0~20 mg/L)、향응속도쾌(<60 s)、준학성고、가역성화은정성호등우점；재생물우동존재하,침적물 DO 변화교소,대상복수DO 영향교대,저시유우물리혼합화양화환원등다충궤제종합작용소치,생물우동장직접혹간접영향저사작용。
A new plane sensing membrane was developed in the study,and then a system was established to monitor the spatial and temporal distribution of dissolved oxygen (DO)in a simulated freshwater/sediment microcosm.Sensing foils were fabricated by physical entrapping fluorescent indicator tris(4,7-diphenyl-1,10-phenanthroline)ruthenium dichloride in ethyl cellulose film,and the emission fluorescence intensity was decreased with the increase of the concentration of dissolved oxygen,which conforms to the Stern-Volmer equation of the fluorescence quenching mechanism.The sensor is precise,stable,with fast response time (<60 s)and good reversibility,and has a wide DO-sensitive range (0-20 mg/L).According to the monitoring results by the system,although the temporal and spatial variation in the sediment was minor under bioturbation,the sediment has significant effects on the DO of overlying water.Complex changes of DO in the system were the result of combined effects of a variety of mechanisms such as physical mixing and redox.And these effects were all affected by bioturbation.