中南大学学报（自然科学版）2011，Vol.42Issue(7)：2156-2161,6.
改性粉煤灰对空气中甲醛的吸附研究
Adsorption of formaldehyde in air by modified fly ash
摘要
Abstract
Using fly ash as a carrier, three kinds of methods were used to modify the nature of fly ash in order to study adsorption characteristics and the removal of formaldehyde in air under different experimental conditions. The mechanism of fly ash to adsorption and desorption of formaldehyde was also discussed. The results show that the adsorptive capacities of formaldehyde by modified fly ash from strong to weak are as follows: ZnCl2-modified fly ash, heat-treatment fly ash, water-treatment fly ash. When dosage of ZnCl2-modified fly ash is 1.0 g, the original concentration of formaldehyde is 0.41 mg/m3 and the temperature is 25℃, the maximum removal rate can reach 70.48%, which is much higher than that of non-modified fly ash (30.71%), and as much as that of coal-based activated carbon (68.96%). ZnCl2-modtfied fly ash can be effectually reused after reactivated, and the removal rate of formaldehyde remains up to 60.02% after five regenerations.关键词
甲醛/吸附/粉煤灰/最大去除率/改性Key words
formaldehyde/adsorption/fly ash/maximum removal rate/modification分类
资源环境引用本文复制引用
蔡志红,李彩亭,文青波,路培,李珊红,曾光明..改性粉煤灰对空气中甲醛的吸附研究[J].中南大学学报（自然科学版）,2011,42(7):2156-2161,6.基金项目
国家自然科学基金资助项目(50878080) （50878080）
长沙市科技重大专项(K0902006-31) （K0902006-31）
