...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of water reuse and desalination >Influence of nitrite on the removal of Mn(II) using pilot-scale biofilters
【24h】

Influence of nitrite on the removal of Mn(II) using pilot-scale biofilters

机译：亚硝酸盐对中试规模生物滤池去除Mn（II）的影响

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Two pilot-scale biofilters were used to systematically investigate the influence of nitrite on biological Mn(II) removal. Gibbs free energy change (ΔG) of the redox reaction between MnO2 and NO2– was 122.28 kJ mol–1 in 298 K, suggesting that MnO2 could not react with NO2–. When nitrite in the influent was increased from 0.05 to 0.5 mg L–1, manganese oxides did not react with nitrite in anaerobic conditions; nitrite was quickly oxidized and biological Mn(II) removal was slightly affected in 2 h in aerobic conditions. When nitrite was accumulated in the biofilter by increasing ammonia concentration, nitrite existed for more than 3 d and biological Mn(II) removal was affected in 3 d. When Mn(II) and ammonia in the influent were about 2 and 1.5 mg L–1, respectively, both of them were completely removed and the oxidation-reduction potential was increased with the depth of the filter from 16 to 122 mV. Biological Mn(II) removal followed the first-order reaction, and the k-value was 0.687 min–1.
机译：两个中试规模的生物滤池用于系统地研究亚硝酸盐对生物Mn（II）去除的影响。在298 K中，MnO2与NO2–之间的氧化还原反应的吉布斯自由能变化（ΔG）为122.28 kJ mol–1，表明MnO2无法与NO2–反应。当进水中的亚硝酸盐从0.05 mg L-1增加到0.5 mg L-1时，锰氧化物在厌氧条件下不会与亚硝酸盐反应。亚硝酸盐被快速氧化，在有氧条件下2小时内对生物Mn（II）的去除影响很小。当通过增加氨浓度使亚硝酸盐积累在生物滤池中时，亚硝酸盐存在时间超过3 d，并且在3 d内影响了生物Mn（II）的去除。当进水中的Mn（II）和氨分别约为2和1.5 mg L-1时，它们都被完全除去，并且随着过滤器深度的增加，氧化还原电位从16 mV增加到122 mV。生物Mn（II）的去除遵循一级反应，k值为0.687 min-1。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号