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天然多糖体聚合物网络用于持续释放营养物质,以刺激地下水中存在的芳香碳化合物降解土著微生物的活性
Jili Wang1, Yuling Zhang1, Xi Wang1
1Key Lab of Groundwater Resources and Environment, Ministry of Education, Jilin University, Changchun 130021, People's Republic of China; College of New Energy and Environment, Jilin University, Changchun 130021, People's Republic of China; Institute of Water Resources and Environment, Jilin University, Changchun 130021, People's Republic of China.
The Science of the total environment
|June 10, 2023
概括
一种新的封装生物营养素 (SA-H-CS) 有效地刺激土著地下水微生物降解芳香 (AHs). 这种生物刺激增强了微生物的生长,多样性和代谢功能,以有效地修复污染物.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生物技术是生物技术.
背景情况:
- 芳香碳化合物 (AHs) 污染地下水,导致由于微生物种群和营养素有限而导致自然修复不良.
- 地下水中的土著微生物具有降解能力,但需要刺激才能有效地去除AH.
研究的目的:
- 开发和评估一种新的封装生物营养素,以刺激土著微生物群降解地下水中的芳香化合物.
- 为了优化营养物质的输送和寿命,以提高AH污染场所的生物修复.
主要方法:
- 使用控制释放技术开发一种基于天然多糖的封装向生物营养素 (SA-H-CS).
- 微观实验和对AH受污染的地点的调查,以评估营养素的有效性和微生物的反应.
- 在治疗后分析微生物群体结构,多样性和代谢功能.
主要成果:
- 合成的SA-H-CS表现出一个紧的结构,营养成分易于扩散,有效持续时间延长至20天.
- SA-H-CS显著提高了AH降解效率,即使在高污染物度下,也保持了高的降解率 (>80%).
- 微生物分析显示,在SA-H-CS刺激下,快速生长,多样性增加,AH降解细菌 (Actinobacteria,Arthrobacter,Rhodococcus,Microbacterium) 的比例更高.
结论:
- SA-H-CS是一种有效的生物刺激剂,可增强地下水中芳香碳化合物的降解.
- 封装的生物营养素改善了营养物质的输送,微生物活动和代谢功能,从而导致有效的现场生物修复.
- 这项技术提供了一种有希望的方法,通过利用土著微生物群落来修复受AH污染的地下水生态系统.
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