改性块状杉木树皮对刚果红的吸附性能研究

Adsorption Properties of Modified Bulk Fir Bark to Congo Red

通过不同的改性方法对杉木树皮进行改性,经比较可知,采用甲醛与盐酸混合液浸泡杉木树皮的方法较优。甲醛与盐酸体积比为5:1,在室温下反应两小时即可得到改性块状杉木树皮。且改性后的杉木树皮与未改性的杉木树皮相比,杉木树皮对刚果红的吸附容量提高了6.9倍,还探究了各个因素初始浓度,时间,pH,温度、离子强度对改性后的杉木树皮吸附性能的影响。且改性块状杉木树皮进行3次循环利用后对刚果红的去除率还能达到70%左右。

The fir bark was modified by different modification methods.It was known that the method of soaking fir bark with formaldehyde and hydrochloric acid mixture was better.The volume ratio of formaldehyde to hydrochloric acid was 5:1,and the modified block-shaped fir bark can be obtained by reacting at room temperature for 2 h.Compared with the unmodified fir bark,the adsorption capacity of the Chinese fir bark to Congo red was increased by 6.9 times.The initial concentration,time,pH,temperature and ionic strength of each factor were also investigated.The removal rate of Congo red can reach about 70%after the three-time recycling of the modified block fir bark.