改性松针对水中壬基酚的吸附  

Adsorption of nonyl phenol in water by modified pine needle

作　　者：范荣桂[1] 姜清凤 张世强[1] 李美[1] 陈瑶[1] 

机构地区：[1]辽宁工程技术大学环境科学与工程学院,阜新123000

出　　处：《环境工程学报》2016年第12期7046-7050,共5页Chinese Journal of Environmental Engineering

基　　金：辽宁工程技术大学2014年研究生科研立项资助项目(5A2014028)

摘　　要：研究了由乙醇改性后的松针对水中壬基酚的吸附去除效果;探讨了其吸附过程的热力学和动力学行为;考察了pH、温度对吸附效果的影响。实验结果表明,改性松针对水中壬基酚具有很好的吸附能力,当壬基酚浓度为10 mg·L^(-1),溶液30 m L、吸附剂投加量为1 g、温度为25℃、pH值为7时,35 min达到吸附饱和,实验饱和吸附量为0.279 mg·g^(-1),吸附去除率为93.3%;吸附过程符合准一级动力学方程,并能够同时满足Langmuir和Freundlich吸附等温吸附模型。The efficiency of adsorption-based removal of nonylphenol in water by alcohol-modified pine needles was studied in this work. The thermodynamics and kinetics of the adsorption process are thoroughly discussed. The pH and temperature,which affected the adsorption efficiency,were investigated. The experimental results showed that the modified pine needles had high adsorption capacity for nonylphenol in water. The adsorption capacity of the modified pine needles for nonylphenol could reach saturation in 35 min. When the initial concentration,adsorbent dosage,temperature,and pH value were 10 mg·L^-1（ 30 m L）,1 g,25 ℃,and 7,respectively,the saturated adsorption capacity was 0. 279 mg·g^-1. Under the above conditions,the removal efficiency of nonylphenol in water was approximately 93. 3%. The adsorption process could be described by pseudofirst-order reaction kinetics. The adsorption isotherm could also simultaneously satisfy both the Langmuir and Freundlich isotherm models.

关 键 词：松针 改性 吸附 壬基酚 

分 类 号：X703[环境科学与工程—环境工程]