Journal ArticleDOI
Reductive immobilization of pertechnetate in soil and groundwater using synthetic pyrite nanoparticles.
TLDR
The results demonstrated that the pyrite particles may serve as a long-lasting reactive material to remediate Tc-contaminated soil, groundwater and solid wastes.About:
This article is published in Chemosphere.The article was published on 2017-05-01. It has received 34 citations till now. The article focuses on the topics: Permeable reactive barrier & Groundwater remediation.read more
Citations
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Modification, application and reaction mechanisms of nano-sized iron sulfide particles for pollutant removal from soil and water: A review
Yaoning Chen,Weiyu Liang,Yuanping Li,Yanxin Wu,Yanrong Chen,Wei Xiao,Li Zhao,Jiachao Zhang,Hui Li +8 more
TL;DR: A comprehensive review on the evolution of nano-sized iron sulfide (FeS) nanoparticles for environmental decontamination can be found in this article, where the synthesis of bare nano-size FeS particles via physicochemical and biological methods, the modification for nano-s particles by coating stabilizers and loading supporting materials are described in this review.
Journal ArticleDOI
Iron sulphides mediated autotrophic denitrification: An emerging bioprocess for nitrate pollution mitigation and sustainable wastewater treatment.
TL;DR: An iron sulphides-based biotechnology towards next-generation wastewater treatment (NEO-GREEN) is proposed, which can potentially harness bioenergy in wastewater, incorporate resources (P and Fe) recovery, achieve simultaneous nutrient and emerging contaminants removal, and minimize waste sludge production.
Products of pertechnetate radiolysis in highly alkaline solution: structure of TcO2(dot)xH2O
TL;DR: In this article, radiolytic reduction of TcO4- in alkaline solutions containing selected organic compounds, approximating the conditions in HLW, was investigated to determine the classes of compounds that can be formed under these conditions.
Journal ArticleDOI
In situ remediation of subsurface contamination: opportunities and challenges for nanotechnology and advanced materials
Tong Zhang,Gregory V. Lowry,Natalie L. Cápiro,Jianmin Chen,Wei Chen,Yongsheng Chen,Dionysios D. Dionysiou,Daniel W. Elliott,Subhasis Ghoshal,Thilo Hofmann,Heileen Hsu-Kim,Joseph B. Hughes,Chuanjia Jiang,Guibin Jiang,Chuanyong Jing,Michael C. Kavanaugh,Qilin Li,Sijin Liu,Jie Ma,Bingcai Pan,Tanapon Phenrat,Xiaolei Qu,Xie Quan,Navid B. Saleh,Peter J. Vikesland,Qiuquan Wang,Paul Westerhoff,Michael S. Wong,Tian Xia,Baoshan Xing,Bing Yan,Lunliang Zhang,Dongmei Zhou,Pedro J. J. Alvarez +33 more
TL;DR: In this paper, the authors discuss opportunities for nanotechnology-enabled in situ remediation technologies to address soil and groundwater contamination, as well as the potential barriers for implementation and strategies and research needs to overcome these barriers.
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Enhanced immobilization of U(VI) using a new type of FeS-modified Fe0 core-shell particles
TL;DR: In this article, a new type of FeS-modified zero valent iron (S-ZVI) core-shell particles (FeS@Fe0) was synthesized through a facile two-step reaction approach, and then tested for reductive sequestration of U(VI) in water.
References
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Journal ArticleDOI
Pyrite oxidation and reduction: Molecular orbital theory considerations
TL;DR: In this article, molecular orbital theory is used to explain a heterogeneous reaction mechanism for both pyrite oxidation and reduction, and the mechanism demonstrates that the oxidation of FeS2 by Fe(3+) may occur as a result of three important criteria: (1) the presence of a suitable oxidant having a vacant orbital (in case of liquid phase) or site (solid phase) to bind to the FS2 via sulfur; (2) the initial formation of a persulfido (disulfide) bridge between FeS 2 and the oxidant, and (
Journal ArticleDOI
Abiotic reductive dechlorination of chlorinated ethylenes by iron-bearing soil minerals. 1. Pyrite and magnetite.
Woojin Lee,Bill Batchelor +1 more
TL;DR: Basic knowledge is provided to better predict the fate of chlorinated ethylenes and to understand the potential of abiotic processes in natural attenuation.
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Abiotic Reductive Dechlorination of Chlorinated Ethylenes by Iron-Bearing Soil Minerals. 2. Green Rust
Woojin Lee,Bill Batchelor +1 more
TL;DR: The findings are relevant to the understanding of the role of abiotic reductive dechlorination during natural attenuation in environments that contain GR(SO4).
Journal ArticleDOI
Reduction of pertechnetate (Tc(VII)) by aqueous Fe(II) and the nature of solid phase redox products
John M. Zachara,Steve M. Heald,Steve M. Heald,Byong-Hun Jeon,Ravi K. Kukkadapu,Chongxuan Liu,James P. McKinley,Alice Dohnalkova,Dean A. Moore +8 more
TL;DR: The subsurface behavior of 99Tc, a contaminant resulting from nuclear fuels reprocessing, is dependent on its valence (eg, IV or VII) Abiotic reduction of soluble Tc(VII) by Fe(II)(aq) in pH 6-8 solutions was investigated under strictly anoxic conditions using an oxygen trap.