A series of macroporous silicates with zeolitic microporous frameworks have been successfully prepared by self assembly of discrete colloidal crystals of silicalite 1, titanium silicalite 1(TS 1) and ZSM 5 , using pol...A series of macroporous silicates with zeolitic microporous frameworks have been successfully prepared by self assembly of discrete colloidal crystals of silicalite 1, titanium silicalite 1(TS 1) and ZSM 5 , using polystyrene(PS) spheres as templates. The properties of these novel materials were characterized by means of XRD, IR, SEM, 29 Si MAS NMR and N 2 adsorption/desorption measurements. These materials show ordered spheroidal voids, which are interconnected in three dimensions through windows. The ordering of the macropores are mainly affected by the particle size of the colloidal zeolites. [WT5HZ]展开更多
为解决矿物凝聚除藻技术不能同步除氮除磷、材料易散失、底泥量大、去除效果持续性短等弊端,对11种矿物材料进行吸附去除NH_(4)^(+)-N、TP、Chl-a和TUB的性能测定筛选,以吸附NH_(4)^(+)-N效果最好的绿沸石为基础材料,制备5种免烧类绿沸...为解决矿物凝聚除藻技术不能同步除氮除磷、材料易散失、底泥量大、去除效果持续性短等弊端,对11种矿物材料进行吸附去除NH_(4)^(+)-N、TP、Chl-a和TUB的性能测定筛选,以吸附NH_(4)^(+)-N效果最好的绿沸石为基础材料,制备5种免烧类绿沸石基复合材料(NGZC),分析NGZC的表面形貌结构,探讨了发泡剂和水泥用量、绿沸石与其余矿物的物料比等因素对NGZC净水性能的影响,以及NGZC投加量、水处理反应温度和时间等因素对去除河道污水中多种污染物效果的影响。结果表明,在设定的养护条件下,NGZC最佳制备条件为:水泥掺量为10%~15%,发泡剂掺量为0.25%~0.5%,绿沸石与牡蛎壳、凹凸棒石黏土、活性白土、水滑石、赤玉土的物料比分别为8∶2、4∶6、6∶4、4∶6、4∶6。最佳水处理条件为:25℃下,200 mL污染河水中加4 g NGZC,处理3 d。本研究为藻型富营养化水体的污染修复、非金属矿物和废弃物的资源化利用和水土保持等提供低成本的复合净水材料和新技术。展开更多
文摘A series of macroporous silicates with zeolitic microporous frameworks have been successfully prepared by self assembly of discrete colloidal crystals of silicalite 1, titanium silicalite 1(TS 1) and ZSM 5 , using polystyrene(PS) spheres as templates. The properties of these novel materials were characterized by means of XRD, IR, SEM, 29 Si MAS NMR and N 2 adsorption/desorption measurements. These materials show ordered spheroidal voids, which are interconnected in three dimensions through windows. The ordering of the macropores are mainly affected by the particle size of the colloidal zeolites. [WT5HZ]
文摘为解决矿物凝聚除藻技术不能同步除氮除磷、材料易散失、底泥量大、去除效果持续性短等弊端,对11种矿物材料进行吸附去除NH_(4)^(+)-N、TP、Chl-a和TUB的性能测定筛选,以吸附NH_(4)^(+)-N效果最好的绿沸石为基础材料,制备5种免烧类绿沸石基复合材料(NGZC),分析NGZC的表面形貌结构,探讨了发泡剂和水泥用量、绿沸石与其余矿物的物料比等因素对NGZC净水性能的影响,以及NGZC投加量、水处理反应温度和时间等因素对去除河道污水中多种污染物效果的影响。结果表明,在设定的养护条件下,NGZC最佳制备条件为:水泥掺量为10%~15%,发泡剂掺量为0.25%~0.5%,绿沸石与牡蛎壳、凹凸棒石黏土、活性白土、水滑石、赤玉土的物料比分别为8∶2、4∶6、6∶4、4∶6、4∶6。最佳水处理条件为:25℃下,200 mL污染河水中加4 g NGZC,处理3 d。本研究为藻型富营养化水体的污染修复、非金属矿物和废弃物的资源化利用和水土保持等提供低成本的复合净水材料和新技术。
