A review of the environmental implications of in situ remediation by nanoscale zero valent iron (nZVI): Behavior, transport and impacts on microbial communities.
A review of the environmental implications of in situ remediation by nanoscale zero valent iron (nZVI): Behavior, transport and impacts on microbial communities.
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DOI：
10.1016/j.scitotenv.2016.02.003
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发表时间：
2016-09-15
影响因子：
9.8
通讯作者：
Gunsch, Claudia K.
中科院分区：
文献类型：
--
作者：
Lefevre, Emilie;Bossa, Nathan;Wiesner, Mark R.;Gunsch, Claudia K.
关键词：
纳米级零价铁（nZVI）用于土壤和地下水原位修复的策略越来越多，这引起了人们对nZVI可能对本地微生物群落和生态系统功能产生潜在不利影响的担忧。本文综述了目前有关nZVI应用对微生物群落影响的文献。毒性研究表明，nZVI通过生成Fe2+和活性氧导致的细胞膜破坏和氧化应激是nZVI细胞毒性的主要机制。此外，nZVI已被证明在很大程度上改变了土著群落的分类和功能组成。然而，由于在现场遇到的物理化学条件会高度调节nZVI的毒性，因此更好地了解影响nZVI毒性和在环境中转运的环境因素对于评估更广泛使用nZVI可能造成的生态后果至关重要。
The increasing use of strategies incorporating nanoscale zero valent iron (nZVI) for soil and groundwater in situ remediation is raising some concerns regarding the potential adverse effects nZVI could have on indigenous microbial communities and ecosystem functioning. This review provides an overview of the current literature pertaining to the impacts of nZVI applications on microbial communities. Toxicity studies suggest that cell membrane disruption and oxidative stress through the generation of Fe2+ and reactive oxygen species by nZVI are the main mechanisms contributing to nZVI cytotoxicity. In addition, nZVI has been shown to substantially alter the taxonomic and functional composition of indigenous communities. However, because the physico-chemical conditions encountered in situ highly modulate nZVI toxicity, a better understanding of the environmental factors affecting nZVI toxicity and transport in the environment is of primary importance in evaluating the ecological consequences that could result from a more extensive use of nZVI.
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