Use of Electrooxidation as a Polishing Step for the Residual Water Obtained in a Solar Wastewater Treatment

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-09-19 DOI:10.29356/jmcs.v67i4.1976

Eva Carina Tarango-Brito, Anabel Ramos-García, Liliana Ivette Ávila-Córdoba, Carlos Barrera-Díaz

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引用次数: 0

Abstract

Abstract. Dyes are widely used in many industrial operations for a variety of products; however, when wastewater is discharged without a treatment in rivers and lakes, severe environmental impacts are observed. In this work, the results of a solar wastewater treatment are presented. The solar treatment consists in parabolic heater coupled with a solar distiller which contains a ZnO plate that works as photocatalyst. Distilled water presents good characteristics; nevertheless, a residue that contains dye and intermediate products is also obtained. An electrooxidation treatment using boron-doped diamond electrodes (BDD), is applied at the residue as a polishing step. It was observed that wastewater quality improves when using an aqueous solution of pH 2.7 and a current density of 22.2 mA cm-2. Physicochemical test such as COD, and UV-Vis were used to evaluate the wastewater quality. It was found that 40 minutes are required to attain the improvement. This technology is environmental friendly since low energy is required (5 kW h L-1). Resumen. Los colorantes son ampliamente utilizados en la industria para una gran variedad de productos; cuando se descargan aguas residuales con dichos compuestos en ríos o lagos, ocasionan severas afectaciones al medio ambiente. Este trabajo presenta los resultados obtenidos al someter agua sintética a un proceso consistente en un calentador acoplado a un destilador solar que contiene un fotocatalizador. En dicho procedimiento se obtiene agua destilada de buena calidad, sin embargo, también se genera un agua residual concentrada con presencia de colorante y productos intermediarios. A manera de pulimento se aplica la electrooxidación empleando electrodos de diamante dopados con boro. Con las mejores condiciones: pH 2.7 y densidad de corriente de 22.2 mA cm-2, se encuentra que el agua residual presenta una notable mejoría en características fisicoquímicas de DQO y espectroscopia UV-Vis. Se encontró que es necesario un periodo de tiempo de 40 minutos para mejorar las características del agua concentrada, lo cual hace que este proceso sea ambientalmente amigable, ya que requiere la aplicación de poca energía (5kW h L-1).

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利用电氧化作为抛光步骤处理太阳能废水中获得的残余水

摘要染料广泛用于许多工业操作的各种产品;然而，当废水未经处理排放到河流和湖泊中时，会产生严重的环境影响。本文介绍了太阳能废水处理的结果。太阳能处理包括抛物面加热器和太阳能蒸馏器，蒸馏器含有作为光催化剂的ZnO板。蒸馏水具有良好的特性;然而，也会得到含有染料和中间产物的残留物。采用掺硼金刚石电极(BDD)对残渣进行电氧化处理，作为抛光步骤。结果表明，在pH为2.7、电流密度为22.2 mA cm-2的条件下，废水水质得到改善。采用COD、UV-Vis等理化指标对废水水质进行评价。结果发现，达到这种改善需要40分钟。该技术是环保的，因为它需要低能量(5kw h L-1)。Resumen。Los colorantes son amamente utilization en la industria para a gran varieties of product;广东的设计人员将废水残留在计算机上，甚至在ríos或lagos中，偶尔或多次影响所有介质环境。Este trabajo提出了许多结果，这些结果表明，在不同的条件下，在不同的条件下，在不同的条件下，在不同的条件下，在不同的条件下，在不同的条件下，在不同的条件下，在不同的条件下，在不同的条件下，在不同的条件下，在不同的条件下，在不同的条件下进行。在这一过程中，我们发现了一种新的方法，即在生产中间商的产品中，我们发现了一种新的产品残留浓度。一种新的方法可以应用在electrooxidación上。实验条件:pH值为2.7 y，浓度为22.2 mA cm-2, pH值为2.7 y, pH值为22.2 mA cm-2, pH值为2.7 y。例如，encontró需要在40分钟的时间内完成一个周期的时间，例如características del agua concentrada，如果需要在40分钟内完成一个周期的时间，则需要在40分钟内完成一个周期的时间，例如características de poca energía (5kW h L-1)。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.