...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Environmental Management >Antibacterial behavior of silver-modified clinoptilolite-heulandite rich tuff on coliform microorganisms from wastewater in a column system
【24h】

Antibacterial behavior of silver-modified clinoptilolite-heulandite rich tuff on coliform microorganisms from wastewater in a column system

机译：含银修饰斜发沸石-辉石的凝灰岩对柱系统废水中大肠菌群的抗菌行为

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 water disinfecting behavior of silver-modified clinoptilolite-heulandite rich tuff (ZSAg) as an antibacterial agent against coliform microorganisms from water in a continuous mode was investigated. Silver recovery from the disinfected effluents by the sodium-modified clinoptilolite-heulandite rich tuff (ZSNa) was also considered. Escherichia coli (ATCC 8739) and total coliform microorganisms, as indicators of microbiological contamination of water, were chosen to achieve the disinfection of synthetic wastewater or municipal wastewater. Ammonium (NH_4~+) and chloride (Cl~-) ions were added to the synthetic wastewater as an interfering chemical species on the disinfection processes. The antibacterial activity of the ZSAg as a bactericide was measured by the coliform concentration as evaluated by the APHA method. The amount of silver in the disinfected effluents was determined using atomic absorption spectroscopy. The inactivation of the ZSAg was calculated from the breakthrough curves based on the model reported by Gupta et al. It was found that when the silver concentration in the effluent is less than 0.6 μg/mL, the bacterial survival percentage increased and the volume of disinfected water diminished. The total silver amounts found in the effluent at the end of the disinfection processes varied depending on the water treated (synthetic or municipal wastewater). The presence of NH4_4~+ ions in synthetic wastewater influent notably improved the disinfected water volume (zero NVC/100mL), in comparison to the disinfection of the same influent without NH4_4~+ ions. A contrary water disinfection behavior was observed in the presence of C1~- ions. The silver recovery does not depend on the mass of the sodium zeolitic bed according with the wastewater to be treated (synthetic or municipal wastewater) and the presence of NH_4~+ or C1~- ions in the influent also influenced the silver recovery from wastewater. The ZSNa did not have antibacterial activity. Therefore the amount of bactericide agent (silver-modified natural zeolite), coliform microorganisms from water (E. coli or consort of coliform microorganisms) as well as the water quality (synthetic wastewater or municipal wastewater) influenced both the disinfection process and the silver recovery in a column system.
机译：以连续模式研究了银修饰的斜发沸石-堇青石的丰富凝灰岩（ZSAg）作为对水中大肠菌群的抗菌剂的水消毒行为。还考虑了通过钠修饰的斜发沸石-赤铁矿富含凝灰岩（ZSNa）从消毒废水中回收银。选择大肠杆菌（ATCC 8739）和总大肠菌群微生物作为水的微生物污染的指标，以实现对合成废水或市政废水的消毒。将铵离子（NH_4〜+）和氯离子（Cl〜-）添加到合成废水中，作为消毒过程中的干扰化学物质。 ZSAg作为杀菌剂的抗菌活性通过APHA法评价的大肠菌浓度来测定。使用原子吸收光谱法测定消毒后的废水中的银含量。 ZSAg的失活是根据Gupta等人报道的模型由穿透曲线计算的。结果发现，当废水中的银浓度低于0.6μg/ mL时，细菌存活率增加，消毒水量减少。在消毒过程结束时，废水中发现的总银量根据所处理的水（合成或市政废水）而变化。与相同的不含NH4_4〜+离子的进水消毒相比，合成废水进水中存在NH4_4〜+离子显着提高了消毒水量（零NVC / 100mL）。在存在C1-离子的情况下，观察到相反的水消毒行为。银的回收率不取决于要处理的废水（合成废水或市政废水）的钠沸石床质量，并且进水中NH_4〜+或C1〜-离子的存在也影响了废水中的银回收率。 ZSNa不具有抗菌活性。因此，杀菌剂（银改性的天然沸石）的量，水（大肠杆菌或大肠菌群）中的大肠菌群以及水质（合成废水或市政废水）均影响消毒过程和银的回收率在列系统中。

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