用修改的生物炭用于沉积物修复:影响,微生物社区的反应和机制
Xudong Deng1, Guomin Chen2, Chao Zhang1
1State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
Environmental pollution (Barking, Essex : 1987)
|October 23, 2024
概括
用修改的生物炭有效地使污染沉积物中的和等重金属固定不动. 这种生物炭还增强了微生物的生物多样性,为沉积物修复提供了一个有希望的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 微生物学 微生物学
背景情况:
- 重金属沉积物污染是与工业活动相关的日益严重的环境问题.
- 生物炭显示了污染沉积物的现场整治的潜力.
- 通过金属氧化物修饰来提高生物炭的吸附能力是关键的研究领域.
研究的目的:
- 为在沉积物中固定 (Pb) 和 (Cd) 制备和评估修饰生物炭 (MBC).
- 为了研究MBC应用对沉积物微生物群体的影响.
主要方法:
- 废物活化污泥生物炭被修改为高酸 (KMnO4),以产生MBC.
- MBC应用于重金属污染的沉积物.
- 分析了重金属吸附能力和物种变化.
- 评估了对沉积物微生物社区结构和生物多样性的影响.
主要成果:
- 改造增强了生物炭的表面积,石墨化,活性点和含氧组,其中Mn2O3存在.
- 对于Pb2+和Cd2+的最大吸附能力分别为176.9 mg/g和44.0 mg/g.
- MBC的应用将Pb从可交换的形式转移到沉积物中的残留形式,显著降低F1含量并增加F4含量.
- MBC的应用增加了微生物的生物多样性,改变了微生物群落的结构,特别是丰富了未培养的f Symbiobacteraceae和Fonticella.
结论:
- 修改了的生物炭有效地固定了污染沉积物中的Pb和Cd.
- 通过增强生物多样性,MBC应用对沉积物微生物群落产生积极影响.
- 金属氧化物和生物炭的组合是重金属沉积物修复的可行策略.
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