Application of Fenton's Reaction for Removal of Organic Matter from Groundwater.

IF 4.2 2区化学 Q2 BIOCHEMISTRY & MOLECULAR BIOLOGY

Molecules Pub Date : 2024-10-31 DOI:10.3390/molecules29215150

Izabela Krupińska

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引用次数: 0

Abstract

In this study, the effectiveness of the Fenton process in removing natural organic matter (NOM) from groundwater was investigated. The subject of this study is groundwater characterised by increased content of NOM and iron (II) compounds. In laboratory-scale studies, the influence of the ratio of concentrations of Fe(II) ions, which are naturally occurring in groundwater, to hydrogen peroxide (H₂O₂) as well as oxidation time and pH on the removal efficiency of organic matter was determined. Indicators such as total organic carbon (TOC), dissolved organic carbon (DOC), UV absorbance at 254 nm (UV₂₅₄), UV absorbance at 272 nm (UV₂₇₂), and specific UV absorbance (SUVA₂₅₄) were used to quantitatively and qualitatively assess the organic substances present in the raw water and after oxidation with Fenton's reagent. Analysis of the results obtained showed that the highest removal efficiency of organic substances in the deep oxidation process using the Fenton reaction was obtained for a concentration ratio of Fe(II) to H₂O₂ = 1:5. Acidification of the water samples to a pH of about 4 and extending the oxidation time to 30 min significantly increased the removal efficiency of organic substances including mainly dissolved organic substances containing aromatic rings. The organic substances containing aromatic rings, determined at a wavelength of 254 nm, were degraded to other organic intermediates.

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应用芬顿反应去除地下水中的有机物。

本研究调查了芬顿法去除地下水中天然有机物（NOM）的有效性。本研究的对象是 NOM 和铁（II）化合物含量增加的地下水。在实验室规模的研究中，确定了地下水中天然存在的铁（II）离子与过氧化氢（H2O2）的浓度比以及氧化时间和 pH 值对有机物去除效率的影响。使用总有机碳（TOC）、溶解有机碳（DOC）、254 纳米紫外吸光度（UV254）、272 纳米紫外吸光度（UV272）和比紫外吸光度（SUVA254）等指标来定量和定性评估原水中和使用芬顿试剂氧化后的有机物质。对所得结果的分析表明，在使用芬顿反应的深度氧化过程中，当 Fe(II) 与 H2O2 的浓度比为 1:5 时，有机物质的去除效率最高。将水样酸化至 pH 值约为 4，并将氧化时间延长至 30 分钟，可显著提高有机物的去除率，其中主要包括含有芳香环的溶解性有机物。在波长为 254 纳米的波长下测定，含有芳香环的有机物质被降解为其他有机中间体。

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

Molecules 化学-有机化学

CiteScore

7.40

自引率

8.70%

发文量

7524

审稿时长

1.4 months

期刊介绍： Molecules (ISSN 1420-3049, CODEN: MOLEFW) is an open access journal of synthetic organic chemistry and natural product chemistry. All articles are peer-reviewed and published continously upon acceptance. Molecules is published by MDPI, Basel, Switzerland. Our aim is to encourage chemists to publish as much as possible their experimental detail, particularly synthetic procedures and characterization information. There is no restriction on the length of the experimental section. In addition, availability of compound samples is published and considered as important information. Authors are encouraged to register or deposit their chemical samples through the non-profit international organization Molecular Diversity Preservation International (MDPI). Molecules has been launched in 1996 to preserve and exploit molecular diversity of both, chemical information and chemical substances.