Probing the reactivity of bio-engineered magnetic magnetite nanoparticles with metals and metalloids
探讨生物工程磁性磁铁矿纳米粒子与金属和类金属的反应性
基本信息
- 批准号:397843392
- 负责人:
- 金额:--
- 依托单位:
- 依托单位国家:德国
- 项目类别:Research Grants
- 财政年份:2018
- 资助国家:德国
- 起止时间:2017-12-31 至 2021-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Global challenges associated with heavy metal and metalloid pollution in drinking water are widespread due to uses in electronics, industrial activities or release during waste disposal. These challenges include threats to human health and food supplies, which have the potential to increase in severity in decades to come. To address these issues, alternative strategies need to be developed to either remove pollutants from water supplies after they have entered, or prevent them from getting into the ecosystem. Amongst some of the potential options available, adsorption remains one of the most effective, particularly when using magnetite as an adsorbent. Magnetite is a mixed-valent, magnetic mineral which contains both Fe(II) and Fe(III). Microbial strategies to producing magnetite nanoparticles have the potential to produce highly magnetic particles with narrow size distributions corresponding to high surface to volume ratios in addition to high Fe(II) content. Furthermore, those magnetite particles are associated with reactive organic compounds and offer a cost effective, and environmentally benign solution which could offer a sustainable approach to toxic metal or metalloid remediation. This proposal aims to use naturally occurring, microbial processes to synthesize bio-engineered magnetic nanoparticles, which can efficiently and effectively induce metal redox changes (i.e. reduction) as well as sorb and sequester a range of toxic metals and metalloids. We want to understand the underlying processes which take place when these pollutants are associated with the mineral surface and the stability of the complexes that form. We will also explore the potential impact of natural organic matter compounds to interfere with and potentially block reactive surface sites on the mineral. Finally, we will investigate how transport processes such as continuous flow conditions affect the efficacy of bio-engineered magnetite nanoparticles to treat toxic metals and metalloids in larger scale systems, analogous to an environmental setting such as an aquifer. For this work we will employ a range of techniques including standard chemical analysis, mineralogical, magnetic, electron microscopy and synchrotron-based analytical methods. The main goal of this proposed PhD project will be to enhance our understanding of how toxic metals and metalloids can become associated with naturally occurring and bioengineered minerals in order to promote future remediation strategies using environmentally benign, sustainable and biologically inspired (bio-engineered) approaches.
由于电子产品、工业活动的使用或废物处理过程中的释放,与饮用水中重金属和类金属污染相关的全球挑战普遍存在。这些挑战包括对人类健康和粮食供应的威胁,其严重程度在未来几十年可能会加剧。为了解决这些问题,需要制定替代战略,以便在污染物进入供水系统后将其清除,或防止它们进入生态系统。在一些可用的潜在选择中,吸附仍然是最有效的选择之一,特别是当使用磁铁矿作为吸附剂时。磁铁矿是一种含铁(II)和铁(III)的混合价磁性矿物。微生物生产磁铁矿纳米颗粒的策略有可能产生具有窄尺寸分布的高磁性颗粒,对应于高表面体积比以及高铁(II)含量。此外,这些磁铁矿颗粒与活性有机化合物有关,提供了一种成本效益高、对环境无害的解决方案,可以为有毒金属或类金属修复提供可持续的方法。该提案旨在利用自然发生的微生物过程合成生物工程磁性纳米颗粒,该纳米颗粒可以有效地诱导金属氧化还原变化(即还原)以及吸收和隔离一系列有毒金属和类金属。我们想了解当这些污染物与矿物表面相关联时发生的潜在过程,以及形成的复合物的稳定性。我们还将探索天然有机物质化合物对矿物表面活性位点的干扰和潜在阻断的潜在影响。最后,我们将研究诸如连续流动条件等运输过程如何影响生物工程磁铁矿纳米颗粒在更大规模系统(类似于含水层等环境设置)中处理有毒金属和类金属的效果。对于这项工作,我们将采用一系列技术,包括标准化学分析,矿物学,磁性,电子显微镜和基于同步加速器的分析方法。这个博士项目的主要目标是提高我们对有毒金属和类金属如何与自然发生和生物工程矿物联系在一起的理解,以促进未来使用环境友好、可持续和生物启发(生物工程)方法的修复策略。
项目成果
期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Chromium (VI) removal kinetics by magnetite-coated sand: Small-scale flow-through column experiments.
磁铁矿包覆砂去除铬 (VI) 的动力学:小规模流通柱实验
- DOI:10.1016/j.jhazmat.2021.125648
- 发表时间:2021
- 期刊:
- 影响因子:13.6
- 作者:Sorwat J;Mellage A;Maisch M;Kappler A;Cirpka O. A;Byrne J. M.
- 通讯作者:Byrne J. M.
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Professor Dr. Andreas Kappler, since 4/2020其他文献
Professor Dr. Andreas Kappler, since 4/2020的其他文献
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{{ truncateString('Professor Dr. Andreas Kappler, since 4/2020', 18)}}的其他基金
Fe(II) oxidation by metabolically flexible phototrophs under complex geochemical conditions
复杂地球化学条件下代谢灵活的光养生物对 Fe(II) 的氧化
- 批准号:
425707332 - 财政年份:2019
- 资助金额:
-- - 项目类别:
Research Grants
DeepEarthshape: Geomicrobiology"Iron-metabolizing bacteria as a driving force in weathering of silicate minerals"
DeepEarthshape:地球微生物学“铁代谢细菌作为硅酸盐矿物风化的驱动力”
- 批准号:
408245216 - 财政年份:2018
- 资助金额:
-- - 项目类别:
Priority Programmes
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