Study on water quality control with intelligent material.

(1)杂化pH响应型凝胶控制溶解氧浓度研究了N-异丙基丙烯酰胺、N-正丙基丙烯酰胺分别与丙烯酸、甲基丙烯酸、4-乙烯基吡啶合成的智能凝胶对pH和温度的溶胀特性。(2)用功能性高分子薄膜去除水中细菌的研究发现，无纺布和涂有少量吡啶类聚合物的硝酸纤维素膜分别是简单过滤和常规超滤有效去除水中细菌和病毒的优良过滤材料。(3)刺激响应性聚合物凝胶的研究：合成了刺激响应性凝胶，其通过光照射或通过添加碱金属离子显示可逆的形状变化。发现响应时间与凝胶尺寸的平方成比例地减小。(4)CO_2浓度对厌氧消化的影响控制CO_2浓度在10 ~ 80%V/V-%范围内，与恒化器型反应器相比，甲烷产气量增加约20%。(5)粒状钙晶种材料除磷研究了粒状钙晶种材料作为磷酸钙成核剂的除磷效果。ALC（蒸压轻质混凝土）和另一种钙化合物可以是生长羟基磷灰石晶体的良好材料。

(1) Dissolved Oxygen Concentration Control with Hybridized pH Responsive Gel.Intelligent Gels synthesized by N-Isopropylacrylamide or N-n-Propylacrylamide with Acrylic Acid, Methacrylic Acid or 4-Vinylpyridine were examined on swelling characteristics with respect to pH and temperature.(2) Removal of Bacteria from Water Using a Thin Film of Functional Polymer.Non-woven cloth and cellulose nitrate membrane coated with a small amount of pyridinium-type polymer were found to be excellent filter materials for effective removel of bacteria and virus from water by simple filtration and conventional ultrafiltration, respectively.(3) Studies on Stimuli-Responsive Polymer Gels.Stimuli-responsive gels, which show reversible shape changes by photo-irradiation or by addition of alkali metal ions, were synthesized. The response time was found to decrease in proportion to the square of the gel size.(4) Effect of CO_2 Concentration on Anaerobic Digestion.The methane gas production increased at a rate of approximately 20% in comparison with that of the chemostat-type reactor by controlling CO_2 concentration from 10 to 80%V/V-%.(5) Phosphorus Removal by Granular Calcium Seed Materiais.Granular calcium materials for phosphorus removal are examined as calcium phosphate nucleation. ALC (Autoclaved Lightweight concrete) and another calcium compound can be good materials for growth of hydroxyapatite crystals.