Oxidation of ammonia by ferrate(vi)
Oxidation of ammonia by ferrate(vi)
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DOI：
10.1080/10934529809376752
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发表时间：
1998-05
期刊：
影响因子：
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通讯作者：
V. Sharma;J. Bloom;V. Joshi
中科院分区：
文献类型：
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作者：
V. Sharma;J. Bloom;V. Joshi
本文研究了高铁酸盐（VI）氧化氨的反应动力学，测定了pH（7.5-11.0）和温度（10-35 °C）对反应的影响。速率随pH值的增加而降低。pH值的依赖性可能与高铁酸盐（VI）和氨的质子化有关。通过数据的理论曲线给出速率常数; k7（HFeO 4-+ NH 4+）= 8.46±0.50x10 - 1 M-1 s-1; kg（FeO 4 2-+ NH 4+）= 1.26±0.11x10 - 1 M-1 s-1; k10（FeO 4 2-+ NH3）= 1.19±0.10x10 - 1 M-1 s-1。启动参数，？H？H？然后呢？S？分别为67.3 ± 3.5kJ/mol和33.1 ± 0.2J/mol·K。当在氧化反应中使用相对于氨过量的高铁酸盐（VI）时，实现22%的氨去除。讨论了高铁酸盐去除废水中氨氮的有效性。
Abstract The kinetics of ammonia oxidation by ferrate(VI) was determined as a function of pH (7.5–11.0) and temperature (10–35 °C). The rates decrease with increase in pH. The pH dependence is probably related to protonation of ferrate(VI) and ammonia. The theoretical curve through data gave the rate constants; k7(HFeO4 ‐ + NH4 +) = 8.46±0.50x10‐1 M‐1s‐1; kg(FeO4 2‐ + NH4 +) = 1.26±0.11x10‐1 M‐1s‐1; k10(FeO4 2‐ + NH3) = 1.19±0.10x10‐1 M‐1s‐1. The activation parameters, ?H? and ?S? were found to be 67.3 ± 3.5 kJ/mol and 33.1 ± 0.2 J/mol.K, respectively. When ferrate(VI) was used in excess relative to ammonia in the oxidation reaction, 22 % of ammonia removal was achieved. The usefulness of ferrate(VI) to remove ammonia from wastewater is discussed.