【作者】 胡博娴；

【导师】 修光利；

【作者基本信息】 华东理工大学 ， 环境科学与工程， 2012， 硕士

【摘要】 虽然室内环境中二氧化硫浓度很低但依然会对文物产生极大损伤,而且还可能增强其他污染物对文物的损伤。因此,研究适用于馆臧文物保存环境空气净化的技术需予以特别关注本文围绕竹炭对文物保存环境中微量二氧化硫的净化展开研究,比较了竹炭粒径、竹炭量、入口浓度、停留时间等不同操作条件下对SO2净化效果的影响；通过对吸附曲线的拟合分析获得竹炭对SO2的吸附容量并建立了竹炭使用寿命的数学模型；为进一步强化吸附作用,比较了竹炭超声改性和微波改性的效果,提高了其SO2的净化效果；通过SEM和EDS分析了改性前后竹炭表面的孔隙特征及C、O元素含量之比,分别考察了在水、有机酸或NOx存在的情况下竹炭对SO2吸附净化效果；通过XPS、FTIR和Boehm滴定分析了官能团吸附机理的关系；基于实际应用,将空气净化和湿度调节两者结合,研究了净化过程和调湿过程之间的相互影响。结果表明；当竹炭量为11 g,入口流速为1 L/min时,竹炭的净化效果最高,接近100%；经过超声改性法和微波改性法处理的1g竹炭对52 ppbSO2的净化效果也能达98%以上,且微波改性法略优于超声改性；竹炭对SO2的净化在相对湿度为40%到60%的情况下表现最佳,低浓度的NOx和有机酸对竹炭净化SO2没有明显影响；竹炭表面的C-O-和C=O基团的含量与其净化作用有很大关联。更多还原

【Abstract】 SO2 not only damages the cultural relics greatly by itself,but also enhances the corrosion of cultural relics together with other aerosol pollutants even though the SO2 concentration is very low in the indoor environment.Therefore it must be paid special attention to air purification technology for preserving the heritage.This thesis focused on the sulfur dioxide purification in the micro-environment to preserve cultural relics by bamboo charcoal.SO2 purification efficiency was studied under different operation conditions,such as charcoal size,charcoal amount,inlet concentration or residence time.Through the fitting analysis of SO2 adsorption curve,adsorption capacity of bamboo charcoal was obtained and the mathematical model was established to calculate the life span of bamboo charcoal.Original bamboo charcoals were modified by means of ultrasound and microwave in order to further increase the adsorption efficiency.The charcoal surface characteristics,including pore nature.the ratio of carbon and oxygen content,were measured by SEM and EDS analysis and compared before and after modification.The SO2 adsorption efficiency on charcoal were investigated in the presence of water,organic acids or NOx respectively.The correlation between functional groups and adsorption mechanism were discussed by XPS,FTIR and Boehm titration.The air purifer and humidity controller were combined to study their interaction.Results indicated that:the highest purification efficiency,nearly 100% was achieved in the case of 11 grams charcoal,the inlet flow rate of 1L/min.The modification by ultrasonic and microwave treatment can increase the purification efficiency to be 98% for 52 ppb SO2 when 1 gram bamboo charcoal was used.Furthermore,the microwave method acts slightly better than ultrasonic modification.The best SO2 removal rate was found when relative humidity ranged between 40% and 60%,SO2 purification efficiency was not significantly impacted by low concentrations NOx or organic acids.The functional groups of C-O- and C=O in the charcoal surface had great relevance with SO2 purification.更多还原