title: Adsorption of Pb(II) and Cu(II) from aqueous solution on magnetic porous ferrospinel MnFe2O4.
abstract: The adsorption of Pb(II) and Cu(II) from aqueous solution on magnetic porous ferrospinel MnFe(2)O(4) prepared by a sol-gel process was investigated. Single batch experiment was employed to test pH effect, sorption kinetics, and isotherm. The interaction mechanism and the regeneration were also explored. The results showed that Pb(II) and Cu(II) removal was strongly pH-dependent with an optimum pH value of 6.0, and the equilibrium time was 3.0 h. The adsorption process could be described by a pseudo-second-order model, and the initial sorption rates were 526.3 and 2631.5 μmol g(-1)min(-1) for Pb(II) and Cu(II) ions, respectively. The equilibrium data were corresponded well with Langmuir isotherm, and the maximum adsorption capacities were 333.3 and 952.4 μmol g(-1) for Pb(II) and Cu(II) ions, respectively. The adsorbed Pb(II) and Cu(II) ions were in the form of the complex with oxygen in carboxyl and hydroxyl groups binding on the surface of magnetic porous MnFe(2)O(4). The sorbent could be reused for five times with high removal efficiency.
authors.affiliation: Key Laboratory of Superlight Materials & Surface Technology, Ministry of Education, College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China.
authors.forename: Yueming
authors.initials: Y
authors.lastname: Ren
authors.forename: Nan
authors.initials: N
authors.lastname: Li
authors.forename: Jing
authors.initials: J
authors.lastname: Feng
authors.forename: Tianzhu
authors.initials: T
authors.lastname: Luan
authors.forename: Qing
authors.initials: Q
authors.lastname: Wen
authors.forename: Zhanshuang
authors.initials: Z
authors.lastname: Li
authors.forename: Milin
authors.initials: M
authors.lastname: Zhang
mesh_terms: D000327:Adsorption; D003300:Copper / Q000302:isolation & purification*; D005290:Ferric Compounds / Q000737:chemistry*; D007854:Lead / Q000302:isolation & purification*; D059346:Magnets / Q000737:chemistry*; D016062:Porosity; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods
chemical_list: D005290:Ferric Compounds; D014874:Water Pollutants, Chemical; C001215:ferrite; D007854:Lead; D003300:Copper