无机纳米材料强化絮凝处理水溶性污染物的机理与应用

Distribution/Stabilization of inorganic nanomaterials in water was studied..Through pH adjusting and sonic disturbing, SiO2 nanoparticles can be well dispersed in water with a distribution of almost 100% particle diameter less than 25 nm, while Al2O3.nanoparticles were dispersed unsatisfied. Initial experiment of using the SiO2 dispersion as a.flocculation-aid showed that flocculation removal of artificial turbidity prepared by Kaolin particles were enhanced: after 3 minutes settling, the turbidity of the flocculated solution decreased from 40 NTU to 1 NTU, while the residual turbidity of control solution (without.adding SiO2 dispersion) was 8 NTU. In addition, the SiO2 dispersion could also improve removal of dissolved big organic molecules such as surfactants during flocculation, but not small organic molecules such as chlorophenols, or metal ions. These results suggested that nomaterial-based water treatment processes might be promise new technology for removal of dissolved organics with big molecule weight.Based on our knowledge, the similar results as above have not been reported in the literature so far.

研究无机氧化物纳米材料对典型水溶性污染物的吸附特性；寻求利用该吸附特性，通过絮凝去除水中溶解性污染物的条件和方法。无机纳米材料对水中溶解性污染物吸附特性研究目前国内外尚未见报道。通过该项目的研究，可望开发利用纳米材料的高效低耗新型水处理工艺，以便解决常规给水处理工艺中溶解性杂质及污水处理中难降解有机物去除率低的难题。