Application of Photoreactive Functional Polymer Gels to Water Quality Control Systems

1. 通过光致变色来控制和预防浮游植物的过度生长：本研究旨在研究通过降低光水平到光合作用所需光水平以下来控制和预防浮游植物的过度生长。制备了屏蔽日光的光致变色薄膜（PC），该薄膜在紫外线照射下表现出无色到彩色等光致变色现象。含螺萘恶嗪的PC薄膜在阳光照射下表现出优异的光显色性，并能长时间保持光显色性。然而，用PC薄膜进行藻类生长势测试的结果与我们预期的相反。在日光照射下，PC膜可以控制混合藻的生长，但PC膜对纯培养的铜绿假单胞菌生长的抑制效果不明显。这可能是由于PC膜的最大吸光度波长（600nm）与光合作用的有效波长（680nm）之间存在差异。PC膜在680nm处的吸光度为20%。光反应性功能凝胶在硝化固定基质中的应用：功能凝胶在光照、温度和pH等环境条件下可逆膨胀和收缩；过度的光线是一种干净且容易控制的环境刺激。光刺激引起的体积变化可以诱导底物在溶剂相和凝胶相之间的电流，并且聚合物链中的叶绿素（CH）可能对底物具有亲和力，因此这些光反应凝胶固定化微生物可能具有加速硝化的可能性。本研究的目的是通过实验来阐明加速度的这些影响。用n -异丙酰胺（NiPAAm）与CH共混制备了固定化微生物的NiPAAm-CH凝胶，清晰地观察了凝胶在光照下的体积变化。批量实验表明，该凝胶具有加速硝化的可能性。少

1. Control and Prevention of Excessive Phytoplankton Growth by Photochromism :This study intends to investigate control and prevention of excessive phytoplankton growth by reducing light levels below those necessary for photosynthesis. The shield sunlight, photochromic (PC) films, which show photochromism such as colorless forms turn to colored forms by ultraviolet irradiation, were prepared. The PC films containing Spironaphthoxazine showed excellent photocoloration under sunlight irradiation, and they maintained the photocoloration for a long period. However the results of algal growth potential tests with the PC films were the opposite to what we had expected. While the growth of mixed algal cultures was controlled with the PC films under sunlight irradiation, the application of the PC films was not successful for the prevention of pure cultures M. aeruginosa growth. It was probably attributable to the difference between the wavelength for the PC films' maximum absorbance (600nm) an … More d the available wavelength for photosynthesis (680nm). The absorbance at 680nm by the PC films was 20%.2. Application of Photoreactive Functional Gels to Immobilization Matrices for Nitrification :Functional gels reversibly swell and shrink in response to environmental conditions such as light, temperature, and pH ; excessively light is a clean and easy environmental stimulus to control. The volume changes induced by light stimuli may induce the current of substrate between solvent phase and gel phase, and furthermore chlorophylin (CH) incorporated into polymer chains may have an affinity to substrate, thereby theses photoreactive gels immobilized microorganisms may have a possibility for acceleration of nitrification. The purpose of this study is to clarify these effects of acceleration experimentally. NiPAAm-CH gels immobilized microorganisms were prepared by blending of N-isopropylamide (NiPAAm) with CH. The volume changes of the gels in response to light irradiation were observed clearly. Batch experiments showed that the gels had a possibility for acceleration of nitrification. Less