摘要
[目的]研究玉米秸秆生物炭对五氯苯酚的静态吸附特性。[方法]探讨吸附剂量、溶液p H、吸附时间等参数对吸附的影响,用Langmuir和Freundlich等温式研究吸附平衡过程。[结果]酸性条件有利于玉米秸秆生物炭吸附剂对五氯苯酚的吸附,吸附过程在30 min即可达到平衡,玉米秸秆生物炭对五氯苯酚的吸附更符合Freundlich等温式。吸附动力学研究表明,吸附过程更符合准二级动力学模型,吸附速率常数为0.015 9 g/(mg·min)。吸附过程是吸热的,升高温度有利于吸附。[结论]玉米秸秆生物炭可用于吸附五氯苯酚。
[Objective]To study the adsorption removal of pentachlorophenol from aqueous solution by com stalk biochar.[Method]Experiments were carried out as function of adsorbent dosage,p H and contact time.The adsorption isotherms were modeled with Langmuir and Freundlich.[Result]The results showed that it was favorable for the adsorption of pentachlorophenol from aqueous solution by com stalk biochar under acid conditions.The adsorption process was fast,and it reached equilibrium in30min contact time.The date fitted well with the Freundlich isotherms.The kinetic data were analyzed using pseudo-first-order and pseudo-second-order models.The pseudo-second-order model was the best for the adsorption pentachlorophenol by com stalk biochar and the adsorption rate constant is0.0159g/(m g?m in).The sorption process was endothermic and raising temperature is favourable for it.[Conclusion]Biochar com straw can be used for the adsorption of pentachlorophenol.
作者
贾丹
卓孔友
谷东岩
JIA Dan;ZHUO Kongyou;GU Dongyan(College of Resource and Environmental Engineering,Jilin Institute of Chemical Technology Jilin, Jilin 132022;Petrochina Jilin Petrochemical Company Wastewater Treatment Plant,Jilin,Jilin 132021;Environmental Protection A-gency of Yongji County,Jilin,Jilin 132200)
出处
《安徽农业科学》
CAS
2018年第1期71-73,共3页
Journal of Anhui Agricultural Sciences
关键词
米秸秆生物炭
五氯苯酚
吸附动力学
吸附平衡
Com stalk biochar
Pentachlorophenol
Adsorption kinetic
Adsorption equilibrium
作者简介
贾丹(1971—) ,女,吉林吉林人,副教授,硕士,从事水污染控制技术研究。
