title: Highly efficient co-removal of copper (II) and phthalic acid with self-synthesized polyamine resin.
abstract: A novel method was proposed for efficient co-removal of Cu (II) and phthalic acid (PA) using self-synthesized polyamine resin (R-NH(2)). The adsorption properties of R-NH(2) were thoroughly investigated by equilibrium, kinetic and dynamic tests in sole and binary systems at pH 5.0. The Freundlich model was a good fit for all the isotherm data, showing higher Kf values in the binary system than the sole system. The pseudo-second-order kinetic equation showed a better correlation to the experimental data in all cases and PA uptake was much faster than that of Cu (II). R-NH(2) showed highest adsorption capacities to both Cu (II) and PA among the five tested resins. Moreover, the presence of PA markedly enhanced the adsorption of Cu (II), being around 3.5 times of that of the sole system. The adsorption of PA was also slightly increased when Cu (II) was coexistent. Furthermore, using Fourier transform infrared spectrometry (FTIR) and species calculations, possible mechanisms were proposed that Cu (II) coordinated with -NH(2) and negative PA species interacted with -NH(3)(+) by electrostatic attraction. [Cu-PA] complex in the binary system possessed a much higher affinity than free Cu (II) to chelating with -NH(2), resulting in mutual enhancement.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, No.163 Xianlin Avenue, Nanjing 210023, China E-mail: jogia@163.com.
authors.forename: Chen
authors.initials: C
authors.lastname: Ling
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, No.163 Xianlin Avenue, Nanjing 210023, China E-mail: jogia@163.com.
authors.forename: Fu-Qiang
authors.initials: FQ
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, No.163 Xianlin Avenue, Nanjing 210023, China E-mail: jogia@163.com.
authors.forename: Chao
authors.initials: C
authors.lastname: Long
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, No.163 Xianlin Avenue, Nanjing 210023, China E-mail: jogia@163.com.
authors.forename: Meng-Meng
authors.initials: MM
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, No.163 Xianlin Avenue, Nanjing 210023, China E-mail: jogia@163.com.
authors.forename: Aimin
authors.initials: A
authors.lastname: Li
mesh_terms: D003300:Copper / Q000737:chemistry*; D010795:Phthalic Acids / Q000737:chemistry*; D011073:Polyamines / Q000737:chemistry*; D012117:Resins, Synthetic / Q000737:chemistry*; D013237:Stereoisomerism; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D010795:Phthalic Acids; D011073:Polyamines; D012117:Resins, Synthetic; D014874:Water Pollutants, Chemical; C032279:phthalic acid; D003300:Copper