Advanced oxidation processes based on zero-valent aluminium for treating textile wastewater

Khatri, Jayraj; Nidheesh, P.V.; Singh, Tejbal; Kumar, M Suresh

doi:10.1016/j.cej.2018.04.074

Cited by 226 publications

(72 citation statements)

References 66 publications

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“…This is evidenced by the growing number of researches devoted to this topic in the world. The mechanisms of photocatalysis involving metal oxides are presented in many studies [264][265][266][267][268][269][270][271][272][273]. At the same time, the prospects of using 1D nanostructures for photocatalytic processes, which have better transport characteristics than traditional nanoparticles, have recently been noted [274,275].…”

Section: Features Of the Use Of Metal Oxides Andmentioning

confidence: 99%

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Dontsova

Nahirniak

Астрелін

2019

Journal of Nanomaterials

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The features of the properties and creation of nanocomposite metal oxide materials, especially TiO2, ZnO, SnO2, ZrO2, and Fe3O4, and their applications for ecology are considered in the article. It is shown that nanomaterials based on them are very promising for use in the ecological direction, especially as sorbents, photocatalysts, and sensitive layers of gas sensors. The crystallochemical characteristics, surface structure, and surface phenomena that occur when they enter the water and air environment are given for these metal oxides, and it is shown that they play a significant role in obtaining the sorption and catalytic characteristics of these nanomaterials. Particular attention is paid to the dispersion and morphology of metal oxide particles by which their physical and chemical properties can be controlled. Synthesis methods of metal oxide nanomaterials and ways for creating of nanocomposites based on them are characterized, and it is noted that there are many methods for obtaining individual nanoparticles of metal oxides with certain properties. The main task is the correct selection and testing of parameters. The prospects for the production of metal oxide nanocomposites and their application for environmental applications are noted, which will lead to a fundamentally new class of materials and new environmental technologies with their participation.

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Section: Features Of the Use Of Metal Oxides Andmentioning

confidence: 99%

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Dontsova

Nahirniak

Астрелін

2019

Journal of Nanomaterials

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“…The task of providing proper treatment facility for the removal of ammoniacal nitrogen (NH 4 -N) from the wastewaters from the dye intermediate industry is not only difficult but also expensive too; hence, there is a strong need of a new or modified technology which overcomes the limitations of the conventional methods (Hasanoglu et al 2010;Karri et al 2018). Advanced oxidation processes (AOPs) drew the attention of researchers for its advantages as it works in ambient temperature and pressure, it has less reaction time and is more economical and feasible than conventional methods (Guedes et al 2003;Khatri et al 2018;Zhang and Zhou 2019). Fenton oxidative process is used for the oxidation of organic pollutants by using nascent hydroxyl ion resulted from the reaction of hydrogen peroxide by ferrous ion (Quan et al 2010;Gonzalez-Merchan et al 2016;Nidheesh 2015).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous removal of COD and Ammoniacal Nitrogen from dye intermediate manufacturing Industrial Wastewater using Fenton oxidation method

et al. 2020

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The untreated wastewater from the dye industry having high ammoniacal nitrogen and chemical oxygen demand (COD) significantly pollutes the receiving water, such as a river, having major ill implications on the aquatic environment. The present study is undertaken to address this problem. It investigates the effectiveness of Fenton reagent in simultaneous treatment (removal) of ammoniacal nitrogen and COD present in the wastewater by varying the parameters like pH, concentration of Fe 2+ and H 2 O 2 and their molar ratio. The reaction time for all the experiments was kept 60 min. The experimental analysis in terms of calculating the residual % of ammoniacal nitrogen and COD revealed that the maximum reduction occurred at pH 3. At this pH, further set of experiments were performed by varying the molar doses of Fe 2+ /H 2 O 2 as 1:1, 3:3 and 5:5, and the results reveal that the maximum reduction in both ammoniacal nitrogen and COD happens at molar dose of 3:3. To understand the effect of the concentration of Fe 2+ and H 2 O 2 on the respective removal efficiency, set of experiments were performed by taking the molar ratio of Fe 2+ /H 2 O 2 as 2:1, 3:1, 5:1, 1:2, 1:3 and 1:5. The experimental analysis reveals that the maximum reduction happened at molar ratio 1:3. Fenton process can mineralize the pollutants up to 75.8% and 78.6% for ammoniacal nitrogen and COD removal. The findings of the study would be of great use for planning and optimizing the wastewater treatment facility for the dye intermediate industry.

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“…The main sources of pollution are the washing and bleaching of natural fibers and the dyeing and finishing steps; these steps add impurities to water (which are added to make the threading and weaving processes easier) as well as auxiliaries and unattached dyes [2]. As the demand for diversified textile products increases, the amount and variety of polluted effluents does as well; these effluents are characterized by their high chemical oxygen demand (COD) and biochemical oxygen demand (BOD), as well as for their persistence in water -this characteristic is attributed to their complex aromatic structure and synthetic origin [3] that makes conventional wastewater treatment plants unable to deal with them effectively [4]. In water, dyes can become toxic and carcinogenic as some of them display chemical structures (azo type) that generate aromatic amines; these are associated with genetic mutations after they are metabolized by the liver and some microorganisms in the intestines of superior animals [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…In this group, the most representative dyes are those that possess a chemical structure that is either indigoid or anthraquinone. Indigoes are used for dyeing cellulosic fibers, mainly denim, and display a non-fixed percentage in water that varies between 5% and 15% [4]; their degradation is limited by the precipitation of the dye when reoxidized by the air or the stream [9].…”

Section: Introductionmentioning

confidence: 99%

“…The process by which sulfur dyes are applied onto fibers is the same as for Vat dyes, as they have to be solubilized using sodium sulfur or a similar compound, which reduces the polysulfide bonds to mercaptan groups [6,10,11]. The degradation of sulfur dyes is a very complicated process as their sulfide group content, along with their high molecular weight, makes them very toxic for most studied microorganisms [4].…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the scale-up of a reactor for the treatment of textile effluents using Bjerkandera sp

Gaviria

Osorio-Echavarría

Gómez-Vanegas

2018

Rev. Fac. Ing. Univ. Antioquia

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Effluents from the textile industry have a negative environmental impact due to their high load of dyes and hard-to-remove compounds: additives, detergents, and surfactants; these must be treated before effluents can be discharged into water. White-rot fungi show great potential for the bioremediation of water and soil matrices contaminated with recalcitrant pollutants (these are generally toxic). In this work, we designed a 5 L fixed bed reactor and evaluated its performance on the degradation of pollutants in effluents from the textile industry in continuous-operation mode under non-sterile conditions, using ligninolytic fungus Bjerkandera sp. (anamorphic state R1). This setup was based on a previous design of a 0.25 L fixed-bed model bioreactor. The system was designed by taking into account the geometric and hydrodynamic similarities of both setups. In continuous-mode color-removal assays, the bioreactor was operated at a 36 h Hydraulic retention time (HRT), a 1 L/min air flux at 33°C, and a dye concentration of 75 g/L (sulfur black 1) and 6.5 g/L (indigo Vat blue 1). 69% of the dye was removed, and changes in the chemical structures of the dyes confirmed the ligninolytic activity of the microorganism as the main dye removal mechanism.. RESUMEN: Los efluentes provenientes de industrias textiles generan impactos ambientales negativos, debido a altas cargas de colorantes y compuestos de difícil remoción como aditivos, detergentes y surfactantes, los cuales deben ser tratados antes de ser descargados a cuerpos de agua. Los hongos ligninolíticos han mostrado gran potencial para procesos de biorremediación de aguas y suelos contaminados con compuestos recalcitrantes y generalmente tóxicos. Este trabajo, se enfoca en el diseño y evaluación del desempeño de un reactor de 5L de lecho fijo para la degradación de efluentes de la industria textil en condiciones no estériles y operación continua, usando el hongo ligninolítico Bjerkandera sp. en su estado anamorfo R1. Dicha tecnología se desarrolló tomando como base para realizar el diseño un biorreactor modelo de lecho de fijo de 0,25 L. El sistema de 5L se diseñó teniendo en cuenta la similitud geométrica e hidrodinámica. En los ensayos de decoloración en continuo el reactor se operó a un tiempo de retención hidráulica (TRH) de 36 h, aireación de 1 L/min y 33°C, además de una carga de colorante de 75g/L para el Negro sulfuroso y 6,5g/L para índigo Vatblue; se alcanzó una decoloración del 69% y se identificaron cambios en las estructuras químicas de los colorantes presentes en el agua residual después del tratamiento, mostrando la actividad ligninolítica del microorganismo como el principal mecanismo de remoción de color.

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Advanced oxidation processes based on zero-valent aluminium for treating textile wastewater

Cited by 226 publications

References 66 publications

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Metaloxide Nanomaterials and Nanocomposites of Ecological Purpose

Simultaneous removal of COD and Ammoniacal Nitrogen from dye intermediate manufacturing Industrial Wastewater using Fenton oxidation method

Evaluating the scale-up of a reactor for the treatment of textile effluents using Bjerkandera sp

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