污染的地下水在现场微生物修复的潜在风险:释放和回迁的
Wang Liu1, Junwen Lv2, Jinxi Peng1
1School of Resources Environment and Safety Engineering, University of South China, Hengyang, 421001, China.
概括
微生物衰变可以从地下水修复工作中释放固定. 这项研究研究了像pH值,时间和金属离子这样的回迁移因素,发现Ca2+的释放显著增加.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 微生物学 微生物学
背景情况:
- 污染地下水的现场微生物修复可能会导致回迁的问题.
- 吸收的细菌的微生物衰变,如莱夫索尼亚种类,产生含有的腐蚀物.
- 了解这种破坏产生的释放对于管理长期环境影响至关重要.
研究的目的:
- 调查影响莱夫索尼亚 sp. 释放的因素. 腐烂. 腐烂. 这是一种腐败.
- 在沙柱中模拟和分析固定的回迁.
- 为优化微生物现场整治策略提供理论基础.
主要方法:
- 进行了批量实验,以评估在不同pH值,接触时间和金属离子度 (K+,Ca2+,Na+,Mg2+,Zn2+) 下释放的.
- 一个沙柱实验模拟了来自Leifsonia sp.的转移. 腐烂. 腐烂. 这是一种腐败.
- 分析涉及释放的物种化 (U(IV) 到U(VI) 氧化) 和功能群 (基,碳基,氨基,胺基) 的分析.
主要成果:
- 释放率在pH 3和120小时达到峰值,最初随pH值下降,随接触时间增加.
- 金属离子,特别是Ca2+ (高达18.4%),与它们的不存在相比,大幅增加了的释放.
- 的释放与U (IV) 氧化到U (VI) 和烂中存在的特定功能组有关.
- 释放动力学遵循埃洛维奇和双常数模型,表明复杂的化学溶解过程.
- 再迁移的主要以乌兰离子的形式存在,较小的部分随着破坏而迁移.
结论:
- 从微生物修复破坏的回归受pH,时间和Ca2+等二价子的影响.
- 氧化U(IV) 到U(VI) 和与腐蚀功能组的相互作用驱动的释放.
- 这些发现支持在现场出水作为管理回迁风险的潜在策略.
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