Adsorption properties of Friedel's salt for the nitrate in the landfill

作者：Yao, Jun; Kong, Qingna; Zhu, Huayue; Shen, Dongsheng^*; Zhang, Zhen

来源：Korean Journal of Chemical Engineering, 2016, 33(2): 553-558.

DOI：10.1007/s11814-015-0174-z

• Adsorption
• Friedel's Salt
• Landfill
• Migration
• Nitrate

Adsorption characteristics of nitrate on Friedel's salt under the landfill circumstance were investigated to explore the effect of Friedel's salt on the migration of nitrate in the landfill. Friedel's salt was synthesized by a coprecipitation method and characterized by XRD and FTIR spectroscopy. The kinetics and isotherm of the adsorption were studied. The effect of the variation of landfill circumstance on the adsorption was also discussed. The result showed that the adsorption capacity of Friedel's salt for nitrate was 2.494mg g(-1). The adsorption process was exothermic and could be well described by pseudo-second-order kinetics and Langmuir-Freundlich equation. Cl- could enhance the adsorption, while SO (4) (2-) , PO (4) (3-) and organic matter could restrict the adsorption. The results suggested that the migration of nitrate in the landfill could be altered by Friedel's salt, which was related to the variation of the landfill circumstance.

• 出版日期2016-2
• 单位浙江工商大学; 台州学院; 浙江大学