天津工业大学学报2016，Vol.35Issue(2)：7-12,6.DOI:10.3969/j.issn.1671-024x.2016.02.002
磁性功能吸附剂的制备及吸附Cr（Ⅵ）的行为
Preparation of magnetic functional adsorbent and its adsorption behavior for Cr(Ⅵ)
摘要
Abstract
Magnetic functional adsorbents (FMS) were synthesized by solvothermal method with 1,6-hexanediamine, sodium citrate and ferric trichloride as the precursors and three kinds of magnetic functional adsorbents were obtained via changing contents of the 1,6-hexanediamine, respectively. Magnetic functional adsorbents were used to adsorb Cr (Ⅵ) from aqueous solution. The effects of contact time, initial concentration and pH on removing amount of Cr (Ⅵ) were investigated, and the best adsorbent was found to be FMS3, which was characterized by field emission scanning electron microscope (FESEM), Fourier transform infrared spectrometer (FT-IR), and Zeta potential. The experimental results indicated that the highest adsorption capacity of Cr(Ⅵ) was around pH=2 at 25℃with the adsorbent amount of 1.0 g/L, and the adsorption of Cr (Ⅵ) on FMS3 reached equilibrium within 120 min and the saturated adsorption capacity for Cr(Ⅵ) was approximately 63.78 mg/g. The adsorption isotherm can be well described by the adsorption kinetics fitted to the pseudo-second-order model and the Langmuir equation. The thermodynamic parametersΔG°、ΔH° andΔS° indicated that the adsorption was spontaneous and endothermic process with increased entropy, and higher temperature would improve the adsorption. The adsorbent can be repeatedly utilized with no significant loss of adsorption capacity. In addition, the magnetic functional adsorbent FMS3 is spherical particles with the average particle size of 45 - 65 nm, and its surface possesses positive electricity in acidic solution.关键词
磁性功能吸附剂/吸附行为/Cr(Ⅵ)去除/溶剂热法Key words
magnetic functional adsorbents/adsorption behavior/Cr(Ⅵ) removel/solvothermal method分类
化学化工引用本文复制引用
文晨,郭静,朱文清..磁性功能吸附剂的制备及吸附Cr（Ⅵ）的行为[J].天津工业大学学报,2016,35(2):7-12,6.基金项目
国家自然科学基金资助项目 （）
