...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemosphere >p-Cresol biotransformation by a nitrifying consortium
【24h】

p-Cresol biotransformation by a nitrifying consortium

机译：硝化财团对甲酚的生物转化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The oxidizing ability of a nitrifying consortium exposed to p-cresol (25mg C L~(-1)) was evaluated in batch cultures. Biotransformation of the phenolic compound was investigated by identifying the different intermediates formed. p-Cresol inhibited the ammonia-oxidizing process with a decrease of 83% in the specific rate of ammonium consumption. After 48 h, ammonium consumption efficiency was 96 ±9% while nitrate yield reached 0.95 ± 0.06 g NO_3~--N g~(-1) NH_4~1 -N consumed. High value for nitrate production yield showed that the nitrifying metabolic pathway was only affected at the specific rate level being nitrate the main end product. The consortium was able to totally oxidize p-cresol at a specific rate of 0.17 ± 0.06 mg p-cresol-C mg~(-1) microbial protein h~(-1). p-Cresol was first transformed to p-hydroxybenzaldehyde and p-hydroxybenzoate, which were later completely mineralized. In the presence of allylthiourea, a specific inhibitor of ammonia monooxygenase (AMO), p-cresol was oxidized to the same intermediates and in a similar pattern as obtained without the AMO inhibitor. AMO seemed not to be involved in the p-cresol oxidation process. When p-hydroxybenzaldehyde was added (25 mg C L~(-1)), the nitrifying process was inhibited in the same way as observed with p-cresol, indicating that p-hydroxybenzaldehyde could be the main compound responsible for nitrification inhibition. p-Hydroxybenzaldehyde was accumulated during 15 h before complete consumption at a specific rate value eight times lower than the p-cresol consumption rate. Results showed that p-hydroxybenzaldehyde oxidation was the limiting step in p-cresol mineralization by the nitrifying consortium.
机译：在分批培养中评估了暴露于对甲酚（25mg C L〜（-1））的硝化财团的氧化能力。通过鉴定形成的不同中间体来研究酚类化合物的生物转化。对甲酚可抑制氨氧化过程，使氨消耗的比速率降低83％。 48小时后，铵消耗效率为96±9％，硝酸盐产率达到0.95±0.06g，消耗的NO_3〜--N g〜（-1）NH_4〜1-N。硝酸盐产量的高值表明硝化代谢途径仅在特定速率水平上受到影响，而硝酸盐是主要的最终产物。该财团能够以0.17±0.06 mg对甲酚-C mg〜（-1）微生物蛋白h〜（-1）的特定比率完全氧化对甲酚。对甲酚首先被转化为对羟基苯甲醛和对羟基苯甲酸酯，随后被完全矿化。在烯丙基硫脲（一种氨单加氧酶（AMO）的特异性抑制剂）的存在下，对甲酚被氧化为相同的中间体，并且以与没有AMO抑制剂时相似的方式被氧化。 AMO似乎不参与对甲酚的氧化过程。当加入对羟基苯甲醛（25 mg C L〜（-1））时，硝化过程的抑制作用与对甲酚相同，表明对羟基苯甲醛可能是抑制硝化作用的主要化合物。对羟基苯甲醛在完全消耗前的15小时内以比对甲酚消耗速率低八倍的特定速率值积累。结果表明，对硝基苯甲醛的氧化是硝化联合体对对甲酚矿化的限制步骤。

著录项

  • 来源
    《Chemosphere》 |2009年第10期|1387-1391|共5页
  • 作者

    C.D. Silva; J. Gomez; E. Houbron; F.M. Cuervo-Lopez; A.-C. Texier;

  • 作者单位

    Department of Biotechnology-CBS, Universidad Autonoma Metropolitana-lztapalapa, Av. San Rafael Atlixco, No. 186-Col, Vicentina D.F., Mexico;

    Department of Biotechnology-CBS, Universidad Autonoma Metropolitana-lztapalapa, Av. San Rafael Atlixco, No. 186-Col, Vicentina D.F., Mexico;

    Facultad de Ciencias Quimicas, Universidad Veracruzana, Prol. OTE 6, No. 1009 Orizaba, Veracruz. Mexico;

    Department of Biotechnology-CBS, Universidad Autonoma Metropolitana-lztapalapa, Av. San Rafael Atlixco, No. 186-Col, Vicentina D.F., Mexico;

    Department of Biotechnology-CBS, Universidad Autonoma Metropolitana-lztapalapa, Av. San Rafael Atlixco, No. 186-Col, Vicentina D.F., Mexico;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    allylthiourea; p-Cresol; p-Hydroxybenzaldehyde; inhibition; nitrification;

    机译：烯丙基硫脲对甲酚对羟基苯甲醛;抑制;硝化作用;

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