摘要
采用分光光度法测定竹炭对甲醛蒸气的吸附量,研究了吸附量与温度及时间的关系,并探讨了竹炭对甲醛的吸附和脱附机理,提出一种竹炭对甲醛吸附的测定方法。结合竹炭的SEM照片,考察了竹炭粉的粒度对甲醛吸附量的影响。结果表明:在 55℃、3h的吸附条件下,竹炭对甲醛蒸气的吸附量最大,达 68. 5mg/g;竹炭粉的粒径对甲醛的吸附量的影响不太显著,这主要由竹炭本身的微观结构决定的;竹炭对甲醛的吸附主要是物理吸附,在脱附过程中,其甲醛余量与时间的关系符合y=109.19x-1.108 4,相关系数r=0.979 4。
Amount of formaldehyde vapor adsorbed by bamboo charcoal was determined by spectrophotometry and the relations among adsorption amount,time and temperature were studied.Furthermore,the mechanism of formaldehyde adsorption and desorption on bamboo charcoal was discussed and the measuring method of formaldehyde adsorption was established.From SEM pictures of bamboo charcoal,the influence of particle size on amount of formaldehyde (adsorption) was investigated.The results showed that,under the adsorption condition of 55 ℃ and 3 h,the adsorption (amount) of formaldehyde on bamboo charcoal was maximal,up to 68.5 mg/g.Bamboo charcoal particle size has some effects on amount of formaldehyde adsorption but not obvious,which is mainly caused by its microstructure.The (adsorption) is mainly physisorption,so the desorption happens quite easily.In the process of desorption,the relation (between) the residual of formaldehyde and time follows the equation y=109.19x^(-1.108 4),at correlative coefficient r=(0.979 4).
出处
《林产化学与工业》
EI
CAS
CSCD
2005年第1期77-80,共4页
Chemistry and Industry of Forest Products
基金
福建省教育厅资助项目(JA03045)
福建省产学研联合开发基金资助项目(无编号)
关键词
竹炭
甲醛
bamboo charcoal
formaldehyde
