...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of industrial and engineering chemistry >Cadmium biosorption by a glyphosate-degrading bacterium, a novel biosorbent isolated from pesticide-contaminated agricultural soils
【24h】

Cadmium biosorption by a glyphosate-degrading bacterium, a novel biosorbent isolated from pesticide-contaminated agricultural soils

机译：草甘膦降解细菌对镉的生物吸附，这是一种从农药污染的农业土壤中分离出来的新型生物吸附剂

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

In this study, biosorption of cadmium (II) ions from aqueous solutions by a glyphosate degrading bacterium, Ochrobactrum sp. GDOS, was investigated in batch conditions. The isolate was able to utilize 3 mM GP as the sole phosphorous source, favorable to bacterium growth and survival. The effect of different basic parameters such as initial pH, contact time, initial concentrations of cadmium ion and temperature on cadmium uptake was evaluated. The adsorption process for Cd (II) is well fitted with Langmuir adsorption isotherm. Experimental data were also tested in terms of biosorption kinetics using pseudo-first-order and pseudo-second-order kinetic models. Maximum metal uptake q_(max) was obtained as 83.33 mg g~(-1). The sorption process of cadmium onto the Ochrobactrum sp. GDOS biomass followed second-order rate kinetic (R~2 = 0.9986). A high desorption efficiency was obtained in pH 2. Reusability of the biomass was examined under successive biosorption-desorption cycle repeated thrice. The characteristics of the possible interactions between biosorbent and metal ions were also evaluated by scanning electron microscope (SEM), Fourier transform infrared (FT-IR) and X-ray diffraction analysis.
机译：在这项研究中，草甘膦降解细菌Ochrobactrum sp。从水溶液中吸收镉（II）离子。在批处理条件下对GDOS进行了研究。该分离物能够利用3 mM GP作为唯一的磷源，有利于细菌的生长和存活。评估了不同的基本参数，例如初始pH，接触时间，镉离子的初始浓度和温度对镉吸收的影响。 Cd（II）的吸附过程非常适合Langmuir吸附等温线。还使用伪一级和伪二级动力学模型就生物吸附动力学测试了实验数据。获得的最大金属摄入量q_（max）为83.33 mg g〜（-1）。镉对the菜属菌种的吸附过程。 GDOS生物量遵循二级速率动力学（R〜2 = 0.9986）。在pH 2下获得高解吸效率。在连续三次的连续生物吸附-解吸循环下检查了生物质的可重复使用性。还通过扫描电子显微镜（SEM），傅立叶变换红外（FT-IR）和X射线衍射分析来评估生物吸附剂与金属离子之间可能相互作用的特征。

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