Effect of emplaced nZVI mass and groundwater velocity on PCE dechlorination and hydrogen evolution in water-saturated sand
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- 作者：Hye-Jin Kima ; b ; Megan Leitcha ; e ; Bhanuphong Naknakorna ; Robert D. Tiltonc ; d ; e ; Gregory V. Lowrya ; c ; e ; glowry@cmu.edu" class="auth_mail" title="E-mail the corresponding author
- 关键词：Nanoiron ; Environmental nanotechnology ; In situ remediation ; DNAPL ; Groundwater treatment
- 刊名：Journal of Hazardous Materials
- 出版年：2017
- 出版时间：15 January 2017
- 年：2017
- 卷：322
- 期：part_PA
- 页码：136-144
- 全文大小：1408 K
文摘
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Reactivity of nZVI increased linearly with nZVI concentration above 10 g/L, but was non-linear below 10 g/L.
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nZVI reactivity with PCE is more sensitive to solution redox potential than solution pH.
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Mass transfer limits the reactivity of emplaced nZVI under typical groundwater flow velocity.
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Lowering pH increases H2 evolution from nZVI more than reactivity with PCE.
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Design of nZVI remediation strategies should consider mass loading and flow velocity on performance and lifetime.