基于ZVI/FeS纳米颗粒技术的原生土壤与生物反应器组成的综合系统处理酸性岩石排水的性能

IF 5.8 3区 环境科学与生态学 0 ENVIRONMENTAL SCIENCES
Aracely Zambrano-Romero, Erika Llumiquinga, Natalia Carpintero-Salvador, Gabriel Trueba, Dario Xavier Ramirez-Villacis, Antonio Leon-Reyes, Darío Bolaños, Margarita Mayacela, Rodny Peñafiel, Luis Cumbal, Valeria Ochoa-Herrera
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引用次数: 0

摘要

采用低成本的物理-化学和生物联合处理系统对酸性岩石排水进行了综合治理。由零价铁和硫化铁(ZVI/FeS)纳米颗粒改性的天然土壤组成的两柱连接到硫酸盐还原(SR)生物反应器;这个综合处理系统使用了从厄瓜多尔埃尔奥罗矿区获得的ARD。平行运行了一个直接加入ARD的硫酸盐还原生物反应器。生物反应器动态运行4个周期,每21 d,进水中ARD的比例从25%逐步增加到100%。综合处理系统对Fe(99%)、As(99.9%)、Cd(99%)、Cu(98%)、Mn(91%)和Zn(99.9%)的去除率均较好,同时两种生物反应器的硫酸盐还原效果相似(50-52%),并将ARD pH从2.75提高到~ 8。然而,与对照生物反应器相比,基于ZVI/FeS纳米颗粒的Technosols显著提高了As (99.9% vs. 68%)和Mn (91% vs. 71%)的去除率。利用16S rRNA测序对生物反应器生物量进行分子生态学分析,发现较高的ARD浓度增强了硫酸盐生成,促进了硫酸盐还原生态位中群落间的有益相互作用。这项研究强调了基于ZVI/FeS纳米颗粒的技术在优化ARD生物修复方面的价值,为中低收入国家(LMIC)的采矿废水管理提供了一个有希望的解决方案。由ZVI/FeS纳米颗粒改性土与生物反应器组成的综合系统处理酸性岩石排水的性能研究。创建于BioRender.com 2/10/2024
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Performance of an integrated system composed of native soil amended with ZVI/FeS nanoparticles-based technosols and a bioreactor for the treatment of acid rock drainage

We assessed combined, low-cost physical–chemical and biological treatment system for the remediation of acid rock drainage (ARD). Two columns composed of native soil amended with zero valent iron and iron sulfide (ZVI/FeS) nanoparticles-based Technosols were connected to a sulfate-reducing (SR) bioreactor; this integrated treatment system was fed with ARD obtained from mines in El Oro, Ecuador. A control sulfate-reducing bioreactor fed directly with ARD was run in parallel. The bioreactors were operated dynamically for four periods, and every 21 days, the fraction of ARD in the influent was increased stepwise from 25 to 100%. The integrated treatment system demonstrated superior removal efficiencies for Fe (99%), As (99.9%), Cd (99%), Cu (98%), Mn (91%), and Zn (99.9%), while both bioreactors achieved similar sulfate reduction (50–52%) and raised ARD pH from 2.75 to ~ 8. However, the ZVI/FeS nanoparticles-based Technosols significantly improved the removal of As (99.9% vs. 68%) and Mn (91% vs. 71%), compared to the control bioreactor. Molecular ecology analysis of the biomass in the bioreactors using 16S rRNA sequencing revealed that higher ARD concentrations enhanced sulfidogenesis, promoting beneficial interactions within communities in the sulfate-reducing niche. This study highlights the value of the ZVI/FeS nanoparticles-based Technosols in optimizing ARD bioremediation, offering a promising solution for mining effluent management in low-middle-income countries (LMIC). 

Graphical Abstract

Performance of an integrated system composed of native soil amended with ZVI/FeS nanoparticles-based Technosols and a bioreactor for the treatment of acid rock drainage. Created in BioRender.com 02/10/2024

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来源期刊
CiteScore
8.70
自引率
17.20%
发文量
6549
审稿时长
3.8 months
期刊介绍: Environmental Science and Pollution Research (ESPR) serves the international community in all areas of Environmental Science and related subjects with emphasis on chemical compounds. This includes: - Terrestrial Biology and Ecology - Aquatic Biology and Ecology - Atmospheric Chemistry - Environmental Microbiology/Biobased Energy Sources - Phytoremediation and Ecosystem Restoration - Environmental Analyses and Monitoring - Assessment of Risks and Interactions of Pollutants in the Environment - Conservation Biology and Sustainable Agriculture - Impact of Chemicals/Pollutants on Human and Animal Health It reports from a broad interdisciplinary outlook.
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