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High selective reduction of nitrate into nitrogen by novel Fe-Cu/D407 composite with excellent stability and activity. | LitMetric

High selective reduction of nitrate into nitrogen by novel Fe-Cu/D407 composite with excellent stability and activity.

Environ Pollut

Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, PR China. Electronic address:

Published: September 2019

AI Article Synopsis

  • A new composite material called Fe-Cu/D407 was developed using nanoscale zero-valent iron and copper on chelating resin to effectively remove nitrates from water.
  • The study achieved impressive results, with nitrate removal rates reaching up to 99.9% and 85% under various conditions, demonstrating strong efficiency across a pH range of 3 to 11.
  • The research also explored the synergetic effects of the components in the composite and proposed mechanisms for the denitrification process based on comprehensive analyses.

Article Abstract

In this study, we develop a new composite material of Fe-Cu/D407 composite via using nanoscale zero-valent iron (nZVI) with copper deposited on chelating resin (D407) to remove nitrate from the water. The experimental results show that a remarkable nitrate removal and the selectivity of N are 99.9% and 89.7%, respectively, under the anaerobic conditions of Cu/Fe molar ratio of 1:2, pH = 3.0. Even without of inert gas and adjusting the initial pH of the solution, the removal rate of nitrate by Fe-Cu/D407 reached to 85% and the selectivity of nitrogen reached to 55%. Meanwhile, the Fe-Cu/D407 maintained preferable removal efficiency of nitrate (100% - 92%) over a wide pH range of 3-11. In addition, the removal rate of the drinking water, lake water and wastewater from the Fe-Cu/D407 is still very high and the reactivity of Fe-Cu/D407 was relatively unaffected by the presence of dissolved ions in the waters tested. Moreover, the synergetic effect of Fe, Cu and D407 in the composite Fe-Cu/D407 were well investigated for the first time according to the analyses of TPR, XPS and EIS. The catalytic mechanism and denitrification routes were also proposed.

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Source
http://dx.doi.org/10.1016/j.envpol.2019.05.071DOI Listing

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