高密度生物质作为基质刺激生物硫化物发生在分层酸性坑湖的深层层
Yutong Liu1, Rachel A Brennan1,2, Javier Sánchez-España3
1Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, Pennsylvania, USA.
Applied and environmental microbiology
|January 12, 2026
概括
这项研究引入了一种新的方法,通过直接添加高密度生物质来修复酸性坑湖,以刺激硫酸盐的减少和沉有害金属.这种方法有效地去除了和等污染物,为受采矿影响的环境提供了切实可行的解决方案.
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:
- 来自采矿活动的酸性坑湖 (APL) 积累了有害的金属化物,造成了严重的环境风险.
- 刺激APL中的异样硫酸盐减少可以导致金属化物沉,有助于修复.
- APL的深层,分层层往往是寡质的,限制了污染物封存的自然生物活动.
研究的目的:
- 评估一种使用高密度生物质的新型直接输送方法,以刺激APL中的生物硫化物生产 (生物硫化物生成).
- 评估该方法在促进金属化物沉通过硫酸盐还原在APL的深层的有效性.
- 为了确定关键的微生物参与者和基质偏好参与APL环境中的生物硫生成.
主要方法:
- 基于实验室的研究模拟了酸性坑湖 (Cueva de la Mora) 的深层.
- 添加高密度生物质 (微藻,藻) 和模型生物成分 (氨基酸,单糖,脂质) 作为电子捐赠体.
- 监测硫化物和挥发性脂肪酸的产生,金属的去除和微生物群体组成 (特别是硫酸盐减少细菌 - - SRB).
主要成果:
- 高密度生物质需要比单个生物组件更短的利用延迟时间.
- 生物硫化物生成有效地通过形成稀溶性金属硫化物矿物质来去除溶解的金属化物 (Zn,As).
- 耐酸的SRB, *Desulfosporosinus*,被显著丰富,表明其在刺激生物硫生成中的作用.
结论:
- 直接输送高密度生物质是一种可行且有效的策略,可以刺激APL中的生物硫生成.
- 这种方法促进了金属化物污染物作为沉物在深层,分层的湖泊层中被封存.
- 该方法为在具有挑战性的酸性坑湖环境中对持久的金属 (化物) 污染的生物修复提供了实际指导.
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