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以红土和人造沸石为原料,戊二醛为交联剂,成功制备出磁性沸石RAG。X射线衍射光谱(XRD)和傅立叶变换红外光谱(FTIR)表征结果表明,合成的RAG保持了红土和人造沸石的结构和特性。将该磁性吸附剂应用于对水溶液中镍的吸附,研究了pH、温度、时间、镍溶液含量、吸附剂投加量对吸附性能的影响,结果表明,RAG对水溶液中镍的吸附量随p H的升高而增大,吸附过程满足拟2级动力学模型和Freundlich等温吸附模型,3 h时达到吸附平衡,303 K时最大吸附量为23.27 mg/g,吸附剂投加量为8.0 g/L时镍的平衡质量浓度低于1.0 mg/L,满足GB 8978-1996排放标准。
With red clay and artificial zeolite as raw materials, glutaraldehyde as cross-linking agent, magnetic zeolite RAG was successfully prepared. X-ray diffraction (XRD) and Fourier transform infrared (FTIR) characterization results show that the synthesized RAG maintains the structure and properties of laterite and artificial zeolite. The magnetic adsorbent was applied to the adsorption of nickel in aqueous solution. The effects of pH, temperature, time, nickel solution concentration and adsorbent dosage on the adsorption performance were studied. The results show that the adsorption capacity of nickel on aqueous solution increases with the increase of p H increased, the adsorption process to meet the pseudo-second-order kinetic model and Freundlich isothermal adsorption model, 3 h to reach equilibrium adsorption, 303 K, the maximum adsorption capacity of 23.27 mg / g, adsorbent dosage of 8.0 g / L nickel equilibrium mass concentration of less than 1.0 mg / L, to meet the emission standards GB 8978-1996.