Re-recognizing micro locations of nanoscale zero-valent iron
2021年3月3日 · In this study, cross-sectional TEM (C-TEM) technique was employed firstly to explore location of NZVI in NZVI/BC. It was observed that NZVI is isolated from BC particles, but not located on...
Enhancing the characteristics and reactivity of nZVI
2020年10月1日 · Polyvinylpyrrolidone/nZVI is highly recommended for the reducible contaminants. Nanoscale zero-valent iron (nZVI) is regarded as one of the most effective materials for environmental remediation. However, nZVI particles tend to aggregate rapidly due to their magnetic properties which leads to decrease their effectiveness in water treatment.
Chemical pathways of Nanoscale Zero-Valent Iron (NZVI) during …
2018年10月1日 · NZVI was synthesized through the reduction of a ferric ion by sodium borohydride in anoxic medium and the resulting particles were characterized by the Transmission Electron Microscope with Energy-dispersive X-ray (TEM-EDX). The NZVI evolution and dissolution in water were examined through a series of batch experiments conducted in varying ...
纳米零价铁 (nZVI) 选择性吸附全氟辛酸 (PFOA) 和全氟辛烷磺酸 …
全氟烷基物质和多氟烷基物质 (pfas) 由于其持久性和对人类和环境的危害而引起了人们的严重关注。本文研究了纳米零价铁（nzvi）对全氟辛酸（pfoa）和全氟辛烷磺酸（pfos）两种代表性pfas的吸附行为。 tem 与元素图谱显示吸附后 nzvi 界面处存在氟，从而提供了 pfoa/pfos 吸附的可视化确 …
Hydrophilic sulfurized nanoscale zero-valent iron for enhancing in …
2023年6月15日 · Column experiments demonstrated S-nZVI achieved TN removal up to 2004 mg L −1 for 127 d. The aim of this study was to investigate the effects of hydrophilic sulfur-modified nanoscale zero-valent iron (S-nZVI) as a biocatalyst for denitrification.
纳米零价铁的表征及改性研究进展 - RCEES
摘要: 纳米零价铁（nanoscale zero-valent iron，nZVI）因其在地下水处理和土壤修复中具有应用前景一直广受关注.但在实际应用中，纳米零价铁nZVI依旧存在颗粒易团聚、传输能力弱和污染物难以选择性去除等方面的问题.为突破这些应用瓶颈，目前已开展了大量nZVI改性 ...
使用 C-TEM 技术重新识别生物炭中纳米级零价铁的微观位 …
生物炭支持的纳米级零价铁 (nzvi/bc)，通常通过使用硼氢化钠 (nabh 4)，对污染物表现出比裸 nzvi 更好的还原性能。 更好的还原能力归因于纳米级零价铁 (NZVI) 附着在生物炭 (BC) 表面或由于扫描电子显微镜 (SEM) 和平面透射电子显微镜 (P-TEM) 观察而进入 BC 颗粒的内部 ...
The TEM analysis of nZVI. Three kinds of nZVI particles were …
Three kinds of nZVI particles were analyzed by TEM: (a) the fresh nZVI particles, (b) the stock nZVI after the reaction with Zn2+, and (c) the stock nZVI as a blank control sample....
TEM image of nZVI particles | Download Scientific Diagram
In this study, nano-scale zero valent iron (nZVI) was synthesized in the ethanol medium by reduction of ferric iron using sodium borohydride as a reducing agent under atmospheric conditions. The...
Green low-cost synthesis of zero-valent iron nanoparticles from
2024年6月28日 · Transmission electron microscopy (TEM), scanning electron microscopy (SEM), and atomic force microscopy (AFM) were conducted to elucidate the particle size, shape, and topology of the synthesized P-NZVI. The TEM images (Fig. 4A, D) reveal that P-NZVI tends to form chain-like aggregates with an average particle size of 70–75 nm. Besides its ...