title: Effect of Cu(II) ions on the enhancement of tetracycline adsorption by Fe3O4@SiO2-Chitosan/graphene oxide nanocomposite.
abstract: Fe3O4@SiO2-Chitosan/GO (MSCG) nanocomposite was investigated by various techniques (SEM, TEM, XRD, VSM, FT-IR, XPS) for the removal of tetracycline (TC). Effects of pH, zeta potential and initial contaminant concentration were studied in detail. Four background cations (Na+, K+, Ca2+and Mg2+) with a concentration of 0.01M showed little influence on the TC adsorption at the studied pH range while the divalent heavy metal cation Cu(II) could significantly enhance the adsorption. The results indicated that the highest adsorption capacity of TC were 183.47mmol/kg and 67.57mmol/kg on MSCG with and without Cu(II), respectively. According to mechanism investigation for the adsorption of TC by pH impact study and XPS analysis, besides electrostatic interaction and π-π interactions, the Cu(II) also acts as a bridge between TC and MSCG, which significantly improve the adsorption of TC. This study provided valuable guidance and effective method for the removal of TC from aquatic environments.
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
authors.forename: Binyan
authors.initials: B
authors.lastname: Huang
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China. Electronic address: liuyunguohnu@163.com.
authors.forename: Yunguo
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Changsha Economic and Technical Development Zone Water Purification Engineering Co.Ltd, Changsha 410100, PR China.
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.affiliation: School of Metallurgy and Environment Central South University, Changsha 410083, PR China; School of Architecture and Art Central South University, Changsha 410083, PR China.
authors.forename: Shaobo
authors.initials: S
authors.lastname: Liu
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
authors.forename: Guangming
authors.initials: G
authors.lastname: Zeng
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
authors.forename: Zhiwei
authors.initials: Z
authors.lastname: Zeng
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Wang
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
authors.forename: Qimeng
authors.initials: Q
authors.lastname: Ning
authors.affiliation: School of Architecture and Art Central South University, Changsha 410083, PR China.
authors.forename: Bohong
authors.initials: B
authors.lastname: Zheng
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
authors.forename: Chunping
authors.initials: C
authors.lastname: Yang
mesh_terms: D000327:Adsorption; D048271:Chitosan; D003300:Copper / Q000737:chemistry*; D006108:Graphite; D007477:Ions; D053761:Nanocomposites; D010087:Oxides; D012822:Silicon Dioxide; D017550:Spectroscopy, Fourier Transform Infrared; D013752:Tetracycline / Q000302:isolation & purification*
chemical_list: D007477:Ions; D010087:Oxides; D012822:Silicon Dioxide; D006108:Graphite; D003300:Copper; D048271:Chitosan; D013752:Tetracycline
keywords: Adsorption; Chitosan; Cu(II); Graphene oxide; Tetracycline (TC)