Study on Influencing Factors and Kinetics of Removal of Ammonia Nitrogen from High Salinity Wastewater by Sodium Hypochlorite Oxidation

• 作者: Fang Xiaoqin Hu Junjie Xia Junfang
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: Sodium HYPOCHLORITE OXIDATION High SALINITY WASTEWATER KINETICS AMMONIA nitrogen
• 年，卷（期）: qxyhjyjywb_2017,（6）
• 页码范围: 72-77
• 页数: 6页
• 分类号: P

摘要

The influencing factors and kinetics of oxidative degradation of ammonia nitrogen in high salinity wastewater by sodium hypochlorite oxidation (NaCIO) were studied. The results showed that the degradation process of ammonia nitrogen by sodium hypochlorite accorded with a pseudo first-order kinetics model, and the influencing factors included NaCIO dosage, initial concentration of ammonia nitrogen, salinity, temperature, and so on. When NaCIO dosage was 0.6% (M a：MN =13.76), the reaction rate constant was up to 0.015 75 m in'1. The higher the initial concentration of ammonia nitrogen was, the worse the effect of oxidation reaction was. When the initial concentration did not exceed 45 mg/L, the effect on oxidation reaction rate constant increased with the increase of the initial concentration. Low salinity had no effect on ammonia nitrogen oxidation.When salinity was higher than 2.0% , the inhibition effect on ammonia nitrogen oxidation would increase, and the reaction rate constant decreased obviously with the increase of salinity. The improvement of reaction temperature was beneficial to ammonia oxidation degradation. As temperature increased from 10 to 35℃, the reaction rate constant rose from 0.001 88 to 0.010 43 min-1.