摘要
最优条件下制备了高强度生物质活性炭纤维(HP-ACF),通过扫描电镜(SEM)、傅里叶变换红外光谱(FT-IR)及热重分析(TGA)进行了结构表征与分析,并作为吸附材料进行DCB模拟废水处理试验研究,考察了投加量、pH、温度以及DCB初始浓度对吸附效果的影响,建立了吸附过程的吸附动力学模型。试验结果表明:(1)制备产品HP-ACF抗压强度为0.246 MPa;(2)对于浓度为20 mg/L的DCB废水,当投加量≥1g/L时,HP-ACF对DCB的去除率达到最大值98.29%;(3)当pH≤5时,有利于HP-ACF对DCB的吸附;(4)拟二级动力学方程为t/q_t=0.800+0.044 t,R^2=0.997 7,拟二级吸附模型能更好地描述HP-ACF对DCB废水的吸附过程。
Under the optimum conditions, the high-performance activated carbon fiber （HP-ACF） was prepared, characterized and analyzed by scanning electron microcscopy （SEM）, Fourier transform infrared spectroscopy （FT-IR） and thermogravimetric analysis （TGA）. HP-ACF was used for DCB removal in the simulated wastewater treatment experiment. The effects of dosage, pH, temperature and initial concentration on its adsorption efficiency were investigated. Also, the adsorption kinetics model was established. Results showed that the compressive strength of HP-ACF prepared from loofah sponge fiber in this experiment reached 0.246 MPa. The removing rate of DCB （20 mg/L） tended to reach the maximum value （98,29%） when the dosage was higher than I g/L in the wastewater. It was beneficial to the adsorption of DCB by HP- ACF when pH was below 5. The pseudo second order rate equation was t/q, =0.800＋0.044 t,R2=0.997 7 and the pseudo second order model can well describe the DCB adsorption process by HP-ACF.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2017年第3期102-106,共5页
Environmental Science & Technology
基金
国家科技重大专项(2016ZX0506005)
关键词
高强度
活性炭纤维
化学改性
吸附
DCB
high-performance luffa fiber
activated carbon fiber
chemical modification
adsorption
DCB
作者简介
焦淑倩（1991-），女，硕士研究生，研究方向为污水处理，（电子信箱）jiaoshuqian2014@163．com；
通讯作者，博士生导师，（电子信箱）xiashibin@126．com。
