• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>3 Biotech >Co-metabolism of thiocyanate and free cyanide by Exiguobacterium acetylicum and Bacillus marisflavi under alkaline conditions
【2h】

Co-metabolism of thiocyanate and free cyanide by Exiguobacterium acetylicum and Bacillus marisflavi under alkaline conditions

机译：碱性条件下乙酰肠杆菌和Marisflavi芽孢杆菌共代谢硫氰酸盐和游离氰化物

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The continuous discharge of cyanide-containing effluents to the environment has necessitated for the development of environmentally benign treatment processes that would result in complete detoxification of the cyanide-containing wastewaters, without producing additional environmental toxicants. Since biological detoxification of hazardous chemical compounds has been renowned for its robustness and environmental-friendliness, the ability of the Exiguobacterium acetylicum (GenBank accession number ) and Bacillus marisflavi (GenBank accession number ) to co-metabolise thiocyanate (SCN−) and free cyanide (CN−) under alkaline conditions was evaluated. E. acetylicum had an SCN− degradation efficiency of 99.9 % from an initial SCN− concentration of 150 mg SCN−/L, but the organism was unable to degrade CN−. Consequently, B. marisflavi had a CN− degradation efficiency of 99 % from an initial concentration of 200 mg CN−/L. Similarly, the organism was unable to degrade SCN−; hence, this resulted in the evaluation of co-metabolism of SCN− and CN− by the two microbial species. Optimisation of operational conditions was evaluated using response surface methodology (RSM). A numeric optimisation technique was used to evaluate the optimisation of the input variables i.e. pH, temperature, SCN− and CN− concentrations. The optimum conditions were found to be as follows: pH 9.0, temperature 34 °C, 140 mg SCN−/L and 205 mg CN−/L under which complete SCN− and CN− degradation would be achieved over a 168-h period. Using the optimised data, co-metabolism of SCN− and CN− by both E. acetylicum and B. marisflavi was evaluated, achieving a combined degradation efficiency of ≥99.9 %. The high degradative capacity of these organisms has resulted in their supplementation on an active continuous biological degradation system that is treating both SCN− and CN−.Electronic supplementary materialThe online version of this article (doi:10.1007/s13205-016-0491-x) contains supplementary material, which is available to authorized users.
机译：将含氰化物的废水连续排放到环境中已经成为开发环境友好的处理工艺的必要条件，该工艺将导致含氰化物的废水完全排毒，而不会产生其他环境毒物。由于危险化学物质的生物排毒以其坚固性和环保性而闻名，因此，乙酰Exiguobacterium aceticumum（GenBank登录号）和Bacillus marisflavi（GenBank登录号）共同代谢硫氰酸盐的能力（SCN -）和游离氰化物（CN -）在碱性条件下进行了评估。从150 mg SCN - / L的初始SCN -浓度开始，乙酰肠杆菌的SCN -降解效率为99.9％无法降解CN -。因此，从200 mg的CN - / L初始浓度开始，Marisflavi芽孢杆菌的CN -降解效率为99％。同样，该生物体无法降解SCN -。因此，这导致了两种微生物对SCN -和CN -的共同代谢的评估。使用响应面方法（RSM）评估了运行条件的优化。使用数值优化技术来评估输入变量的优化，即pH，温度，SCN -和CN -浓度。发现最佳条件如下：pH 9.0，温度34°C，140 mg SCN - / L和205 mg CN - / L，在此条件下完全SCN < sup>-和CN -的降解将在168小时内完成。使用优化的数据，评估了乙酰肠杆菌和marisflavi对SCN -和CN -的共代谢，组合降解效率≥99.9％。这些生物具有很高的降解能力，因此可以在活跃的连续生物降解系统中进行补充，该系统可同时处理SCN -和CN -。电子补充材料文章（doi：10.1007 / s13205-016-0491-x）包含补充材料，授权用户可以使用。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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