β-cyclodextrin modified pine sawdust for efficient adsorption and photo-degradation of bisphenol A in aquatic system
The occurrence of bisphenol A(BPA)raised significant concerns about potential adverse impacts on environmental health,and its removal has become a hot research topic.We conducted batch adsorption and photo-degradation experiments to determine the removal performance of BPA by β-cyclodextrin (β-CD) modified pine sawdust (CD-PS) in an aquatic environment for the first time. Pine sawdust (B-PS) was treated by NaOH firstly and then modified by β-CD. The adsorption behavior of BPA on the B-PS and CD-PS were observed to follow Langmuir and pseudo-second-order kinetic models, and that CD-PS had a 1.2 times higher adsorption capacity than B-PS. At 25 °C and pH=7.0, the maximum adsorption capacity of CD-PS reached 0.0319 mmol/g. Moreover, the effects of β-CD, CD-PS and B-PS on the photo-degradation of BPA were compared under UV irradiation, indicating that CD-PS significantly enhanced the removal efficiency. Results of this work demonstrate that β-CD immobilized on the surface of CD-PS could be acted as an excellent catalyst for BPA removal, and a possible reactive mechanism was further proposed in this regards. These observations indicate that the CD-PS system can remediate BPA-polluted aquatic environment very well.
β-CD sawdust photo-degradation adsorption BPA
Yanbo Zhoua Weiwei Huanga Ke Chena Yonghua Hua Xiaochen Gua Jun Lua
Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education,East China University of Science and Technology,No.130 Meilong Road,Shanghai 200237,China
国内会议
浙江绍兴
英文
99-111
2017-04-15（万方平台首次上网日期，不代表论文的发表时间）