摘要
采用磁性树脂和活性炭混合吸附剂对腐殖酸(HA)进行吸附,研究不同质量比混合吸附剂对HA的吸附,利用吸附动力学、吸附等温线和动态吸附脱附实验对树脂吸附、脱附过程进行分析。结果表明,当磁性树脂和活性炭的质量比为9:1时,混合吸附剂对HA的吸附容量最高,吸附过程符合准2级动力学模型。混合吸附剂对HA的吸附等温线更适合Langmuir模型,25℃时拟合饱和吸附量可达135.1 mg/g。动态吸附过程中,混合填柱固定床对HA的吸附要优于分层填柱,体积比1:1质量分数10%的NaOH、质量分数10%的NaCl对2种吸附固定床能快速脱附。
The adsorption of humic acid by mixed adsorbent consisted of magnetic resin and activated carbon was studied.The HA adsorption by mixed adsorbent with different mass ratio was studied,and resin adsorption and desorption process was analyzed by adsorption kinetics,adsorption isotherm and dynamic adsorption-desorption experiment.The results showed that the adsorption capacity of HA was the highest when the mass ratio of magnetic resin and activated carbon was 9:1.The adsorption process was suitable for pseudo-second-order kinetic model.The adsorption isotherm of HA by mixed adsorbents was more suitable for Langmuir model.The fitting saturated adsorption capacity could reach 135.1 mg/g at 25℃.In dynamic adsorption,the adsorption of HA by mixed packed column in the fixed bed was superior to that by stratified packed column.The NaOH with mass fraction of 10%and NaCl with mass fraction of 10%with a volume ratio of 1:1 could quickly desorb the two kinds of adsorption fixed bed.
作者
彭志群
黄思勉
李强
曹刚
潘飞
夏东升
PENG Zhiqun;HUANG Simian;LI Qiang;CAO Gang;PAN Fei;XIA Dongsheng(School of Environmental Engineering,Wuhan Textile University,Engineering Research Center for Clean Production of Textile Dyeing and Printing,Ministry of Education,Wuhan 430073,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2020年第9期37-41,共5页
Technology of Water Treatment
基金
国家自然科学基金(51908432)
湖北省中央引导地方科技发展专项(2018ZYYD024,2019ZYYD068)
湖北省自然科学基金(2018CFB397)
湖北省自然科学基金(2017CFA026)
武汉市国际科技合作项目(2017030209020255)。
关键词
磁性树脂
活性炭
混合吸附剂
腐殖酸
吸附
magnetic resin
activated carbon
mixed adsorbent
humic acid
adsorption
