纳米二氧化钛控制透水砖堵塞试验研究

Control of Permeable Brick Clogging by Nanometer Titanium Dioxide

为了研究纳米二氧化钛对陶瓷透水砖堵塞的控制效果,采用不同方式在透水砖表面负载纳米二氧化钛,并开展了一系列透水砖堵塞控制试验,测定了透水砖的透水系数随过水时间的变化。结果表明,引入适量纳米二氧化钛可以提高陶瓷透水砖的透水性能。在1 g和4 g纳米二氧化钛负载量下,采用喷涂法和浸提法负载1 g纳米二氧化钛的透水砖均表现出良好的透水性能。喷涂法负载纳米二氧化钛透水砖的透水性能优于浸提法,初期和末期透水系数比未负载纳米二氧化钛的透水砖分别高146.15%和100%。用喷涂法负载粒径为5~10、25、40、100 nm的纳米二氧化钛时,5~10 nm的透水砖表现出最佳的透水性能,且成本最低。因此,推荐采用喷涂法负载纳米二氧化钛,且最适粒径范围为5~10 nm。

To explore the control effect of nanometer titanium dioxide (Nano-TiO_(2)) on ceramic permeable brick clogging,Nano-TiO_(2) was loaded on the surface of permeable brick in different ways,and a series of clogging control tests were carried out to measure the change of permeability coefficient with penetration time.The permeability of ceramic permeable brick was improved by introducing proper amounts of Nano-TiO_(2).Under loading amounts of 1 g and 4 g Nano-TiO_(2),the permeable bricks loaded with1 g Nano-TiO_(2) by spraying and extraction methods both had good permeability.The permeability of permeable bricks loaded with titanium dioxide by spraying method was better than that by extraction method,and the initial and final permeability coefficients of permeable bricks loaded with Nano-TiO_(2) were146.15% and 100% higher than those of the unloaded permeable brick,respectively.When titanium dioxide with particle sizes of 5-10 nm,25 nm,40 nm and 100 nm was loaded by spraying method,permeable bricks with particle sizes of 5-10 nm showed the best permeable performance and the lowest cost.Therefore,it is recommended that the optimal particle size range of Nano-TiO_(2) loaded by spraying method is 5-10 nm.