Treatment characteristics and effects of nanoparticle zero-valent iron (nZVI) powder on nitrogen removal efficiency for sewage treatment

IF 2 Q3 Environmental Science

Water Quality Research Journal of Canada Pub Date : 2014-08-01 DOI:10.2166/WQRJC.2014.102

Mi-Sug Kim, D. Kwak

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引用次数: 1

Abstract

This study aims at estimating nanoparticle typed zero-valent iron (nZVI) process as an advanced nitrogen removal technique. To focus on investigating characteristics and effects of nZVI on nitrogen removal for sewage treatment, batch reactor experiments were conducted to reduce excessive nitrate nitrogen (NO3-N). To improve NO3-N removal efficiency and to find a supporter or alternative of nZVI, silica sand, synthetic zeolite, and a mixture of silica sand, synthetic zeolite, and nZVI were used in the experiments. As a result of this study, the chemical denitrification by nZVI attracted on the magnet surface may be useful for total nitrogen removal in conventional sewage and wastewater treatment plants under the optimal conditions, and application of silica sand also is an excellent adsorbent or media for N-component removal and a supporter as well. This study concludes the end product in this study may be nitrogen gas (N2) through Fe reaction with O2 and NO3− in aerobic nZVI (Fe)–H2O system. Future study is required to examine the competition of nZVI between nitrate and many other compounds depending upon various experimental conditions for improving the nitrate removal efficiency and impeding the ammonium generation.

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纳米颗粒零价铁(nZVI)粉在污水处理中的处理特性及对脱氮效率的影响

本研究旨在评价纳米颗粒型零价铁(nZVI)工艺作为一种先进的脱氮技术。为研究nZVI在污水处理中脱氮特性及对脱氮效果的影响，采用间歇式反应器进行了去除过量硝态氮(NO3-N)的实验。为了提高NO3-N的去除效率，寻找nZVI的载体或替代品，实验采用了硅砂、合成沸石以及硅砂、合成沸石和nZVI的混合物。研究结果表明，在最佳条件下，磁铁表面吸附nZVI进行化学反硝化可用于常规污水处理厂的总氮去除，硅砂的应用也是去除n组分的优良吸附剂或介质和载体。本研究认为，在好氧nZVI (Fe) -H2O体系中，Fe与O2和NO3−反应生成的最终产物可能是氮气(N2)。为了提高硝态氮的去除效率，抑制铵的生成，需要在不同的实验条件下，进一步研究硝酸盐与其他化合物之间的竞争关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Water Quality Research Journal of Canada WATER RESOURCES-

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Water Quality Research Journal publishes peer-reviewed, scholarly articles on the following general subject areas: Impact of current and emerging contaminants on aquatic ecosystems Aquatic ecology (ecohydrology and ecohydraulics, invasive species, biodiversity, and aquatic species at risk) Conservation and protection of aquatic environments Responsible resource development and water quality (mining, forestry, hydropower, oil and gas) Drinking water, wastewater and stormwater treatment technologies and strategies Impacts and solutions of diffuse pollution (urban and agricultural run-off) on water quality Industrial water quality Used water: Reuse and resource recovery Groundwater quality (management, remediation, fracking, legacy contaminants) Assessment of surface and subsurface water quality Regulations, economics, strategies and policies related to water quality Social science issues in relation to water quality Water quality in remote areas Water quality in cold climates The Water Quality Research Journal is a quarterly publication. It is a forum for original research dealing with the aquatic environment, and should report new and significant findings that advance the understanding of the field. Critical review articles are especially encouraged.