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Activation of peroxymonosulfate by cobalt doped graphitic carbon nitride for ammonia removal in chloride-containing wastewater
Separation and Purification Technology ( IF 8.1 ) Pub Date : 2021-04-30 , DOI: 10.1016/j.seppur.2021.118858
Jingwei Hao , Shen Zhao , Ran Mao , Xu Zhao

Ammonia is one of the main nitrogen pollutants in water, and a low concentration of ammonia in water is relatively difficult to remove. The catalytic system activating peroxymonosulfate (PMS) by the cobalt doped graphitic carbon nitride (Co-g-C3N4) was established for the oxidation of ammonia. The high removal efficiency of 98.3% for ammonia can be achieved, and total nitrogen removal efficiency was approximately 76.1% in the Co-g-C3N4/PMS/Cl process. Sulfate radical (SO4•−) was generated during the Co-g-C3N4/PMS process, reacting with chloride ions to produce chloride radical (Cl), which was identified as the main radical species for the transformation of ammonia to nitrogen gas. Moreover, Co-g-C3N4 had a good stability and can be recycled and reused owing to the Co-N bond. The results demonstrated the Co-g-C3N4/PMS/Cl process was an efficient and promising method for the removal of ammonia in chloride-containing wastewater under ambient conditions.



中文翻译:

钴掺杂石墨氮化碳活化过氧一硫酸盐用于去除含氯废水中的氨

氨是水中主要的氮污染物之一,水中的氨浓度较低相对较难去除。建立了通过掺杂钴的石墨碳氮化物(Co-gC 3 N 4)活化过氧单硫酸盐(PMS)的催化体系,用于氨的氧化。可以实现98.3%的高去除率,在Co-gC 3 N 4 / PMS / Cl工艺中,总氮去除率约为76.1%。在Co-gC 3 N 4 / PMS过程中产生了硫酸根(SO 4 •-),它与氯离子反应生成氯根(Cl ),这被认为是将氨转化为氮气的主要自由基种类。而且,Co-gC 3 N 4具有良好的稳定性,并且由于Co-N键而可以再循环和再利用。结果表明,Co-gC 3 N 4 / PMS / Cl工艺是一种在环境条件下去除含氯废水中氨的有效方法。

更新日期:2021-05-06
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