从工业废水中分离出的粪产碱杆菌、阴沟肠杆菌和粘质沙雷氏菌对阴离子表面活性剂的生物降解。
Biodegradation of anionic surfactants by Alcaligenes faecalis, Enterobacter cloacae and Serratia marcescens strains isolated from industrial wastewater.
机构信息
Laboratory of Applied Organic Chemistry, Faculty of Chemistry, University of Sciences and Technology of Houari Boumediene (USTHB), PO Box 32, El Alia, Bab Ezzouar 16111, Algiers, Algeria.
Laboratory of Applied Organic Chemistry, Faculty of Chemistry, University of Sciences and Technology of Houari Boumediene (USTHB), PO Box 32, El Alia, Bab Ezzouar 16111, Algiers, Algeria.
出版信息
Ecotoxicol Environ Saf. 2018 Nov 15;163:629-635. doi: 10.1016/j.ecoenv.2018.07.123. Epub 2018 Aug 7.
Pseudo-persistent organic pollutants, such as anionic surfactants (AS), are nowadays among the more complex problems that threaten the aquatic environments and other environmental compartments. The present work describes the identification and efficiency of a consortium, isolated from Algerian industrial wastewater, to remove three anionic surfactants (i.e., sodium dodecylbenzenesulfonate (SDBS), sodium dodecyl sulfate (SDS) and sodium lauryl ether sulfate (SLES)). The genetic analysis of 16S rRNA indicated that these strains are Alcaligenes faecalis, Enterobacter cloacae and Serratia marcescens. Under aerobic conditions, pH 7.0 and optimum temperature of 30 °C, the mixed consortium allowed to degrade 85.1% of initial SDBS amount after 144 h of incubation with half-life of 20.8 h. While E. cloacae and S. marcescens pure strains eliminated 46% and 41% less SDBS respectively. Evenly, SDS was degraded at only 23.71% by A. faecalis strain. However, the degradation capacity of SDS by the consortium was very high (94.2%) with a half-life of 9.8 h. The SLES anionic surfactant showed a lower biodegradation by the consortium (47.53%) due to the presence of ether oxide units in the chemical structure of SLES which induced toxicity to the medium. The investigation of the biodegradation of this type of organic pollutants by microorganisms has recently become a key issue for the environmental protection area.
假持久性有机污染物，如阴离子表面活性剂（AS），是当今威胁水生环境和其他环境成分的更复杂问题之一。本工作描述了从阿尔及利亚工业废水中分离出的一种混合物去除三种阴离子表面活性剂（即十二烷基苯磺酸钠（SDBS）、十二烷基硫酸钠（SDS）和月桂基醚硫酸钠（SLES））的能力和效率。16S rRNA 的基因分析表明，这些菌株是粪产碱杆菌、阴沟肠杆菌和粘质沙雷氏菌。在好氧条件下，pH 值为 7.0，最佳温度为 30°C，混合培养物在 144 h 的孵育后允许初始 SDBS 量的 85.1%被降解，半衰期为 20.8 h。而 E. cloacae 和 S. marcescens 纯菌株分别减少了 46%和 41%的 SDBS。同样，A. faecalis 菌株只能将 SDS 降解 23.71%。然而，SDS 的降解能力非常高（94.2%），半衰期为 9.8 h。SLES 阴离子表面活性剂由于其化学结构中存在醚氧化物单元，对培养基产生毒性，因此混合物对其的生物降解能力较低（47.53%）。微生物对这种类型有机污染物的生物降解的研究最近已成为环境保护领域的一个关键问题。
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