摘要
实验以纤维素为原料,采用水热碳化法制备生物炭,并用氨水对其进行表面改性用以吸附亚甲基蓝。结果表明,260℃水热碳化纤维素所得生物炭对亚甲基蓝的吸附效果最佳,用10%氨水改性后,生物炭对亚甲基蓝的吸附性能进一步提升。在吸附温度为55℃时,改性生物炭对亚甲基蓝的吸附率为93.5%,比未改性时提高了75.1%。反应动力学可用准二级反应模型描述。
Cellulose derived biochar was prepared by hydrothermal carbonization in this study.Biochar prepared at 260℃ had the best methylene blue adsorption rate among all the biochars and its adsorption rate could be further improved by ammonium hydroxide modification.The methylene blue adsorption rate of modified biochar reached to 93.5% at 55℃,higher than that without modification.The adsorption kinetics of biochar could be expressed by pseudo-second order kinetics.
出处
《山东化工》
CAS
2017年第22期163-165,共3页
Shandong Chemical Industry
关键词
纤维素
水热碳化
氨水
亚甲基蓝
生物炭
cellulose
hydrothermal carbonization
ammonium hydroxide
methylene blue
biochar
