Textile Wastewater Treatment Using Iron-Modified Clay and Copper-Modified Carbon in Batch and Column Systems

Almazán-Sánchez, Perla Tatiana; Linares-Hernández, Ivonne; Solache‐Ríos, M.; Martínez-Miranda, Verónica

doi:10.1007/s11270-016-2801-7

Cited by 29 publications

(13 citation statements)

References 28 publications

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“…Therefore, coagulation appears necessary as suspended solids containing such a high proportion of TDS could not be removed by plain settling alone. BOD and COD ratio of 0.44, which was within the usual range of BOD/COD ratio of 0.25–0.5, [ 56,57 ] represented that a major portion of organic matter was non‐biodegradable. The color of textile wastewater was dark grey with a concentration of 1876 CU.…”

Section: Methodsmentioning

confidence: 94%

Textile Effluent Treatment Using Natural Coagulant Opuntia stricta in Comparison with Alum

Hussain

Haydar

2021

CLEAN Soil Air Water

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Natural plant‐based coagulants have gained popularity as sustainable and cost‐effective alternatives to chemical coagulants. In this study, a novel plant‐based coagulant, Opuntia stricta (O. stricta), is evaluated in comparison to alum for the treatment of textile wastewater. Response surface methodology is employed to optimize the treatment variables pH and coagulant dose. Efficacy of coagulants are compared based on removal of total suspended solids (TSS), chemical oxygen demand (COD), and color. Coagulants are characterized using Fourier transform infrared (FTIR) spectroscopy and flocs produced are analyzed using scanning electron microscopy (SEM). Alum shows a maximum removal of 87%, 75.9%, and 79.6% for TSS, COD, and color, respectively (optimum pH 9; dose: 103 mg L−1). O. stricta gives a maximum removal of 80.2%, 58.4%, and 77.3% for TSS, COD, and color, respectively (optimum pH 10.3; dose: 162.2 mg L−1). The optimum pH of O. stricta aligns well with actual pH of textile effluent (i.e. 10.6). Among the target pollutants, removal of COD is more dependent on pH as compared to the dose of coagulants. Coagulation agent in cladodes of O. stricta is postulated to be polysaccharides, which acts through adsorption and interparticle bridging mechanism of coagulation.

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Section: Methodsmentioning

confidence: 94%

Textile Effluent Treatment Using Natural Coagulant Opuntia stricta in Comparison with Alum

Hussain

Haydar

2021

CLEAN Soil Air Water

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“…Dyes are often transformed into toxic aromatic amines that absorb and reflect sunlight, affecting the photosynthesis of aquatic plants (Almazán-Sánchez et al 2016 ). In water bodies, dyes can generate problems with the absorption of light necessary for biomass, and their accumulation in lakes can cause ecological imbalances (Shinde, Patil, G.-D. Kim, et al 2020 ).…”

Section: Dye Characteristicsmentioning

confidence: 99%

A critical review of textile industry wastewater: green technologies for the removal of indigo dyes

Castillo-Suárez

Sierra-Sánchez²,

Linares-Hernández³

et al. 2023

Int. J. Environ. Sci. Technol.

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The denim textile industry represents an important productive sector. It generates wastewater with low biodegradability due to the presence of persistent pollutants, which can produce toxic and carcinogenic compounds; therefore, wastewater treatment reduces risks to aquatic life and public health. This paper presents a review of 172 papers regarding textile industry wastewater treatment for the removal of contaminants, especially indigo dyes used in the denim industry, in the context of green technologies. The physicochemical characteristics of textile wastewater, its environmental and health impacts, and the permissible limit regulations in different countries were reviewed. Biological, physicochemical and advanced oxidation processes for the removal of indigo dyes were reviewed. The goal of this study was to analyze the characteristics of green technologies; however, the research does not clearly demonstrate an effect on energy consumption savings, carbon footprint decreases, and/or waste generation. Advanced oxidation processes showed the highest color removal efficiency (95 and 97% in synthetic or real wastewater, respectively). Photocatalysis and Fenton reactions were the most efficient processes. None of the revised works presented results regarding upscaling for industrial application, and the results should be discussed in terms of the guidelines and maximum permissible limits established by international legislation. New technologies need to be developed and evaluated in a sustainable context with real wastewater.

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“…for the degradation of dyes in wastewater, such as biological treatments, coagulation/ flocculation; electrochemical reactions such as Fenton, ozonation, adsorption and heterogeneous photocatalysis (Almazán-Sánchez et al, 2016). The latter shows greater advantages than the former because degradation occurs in relatively short times (180 min on average), the formation of byproducts of greater toxicity is avoided and, when appropriate photocatalysts are used.…”

Section: Different Technologies Have Been Studiedmentioning

confidence: 99%

Fe3O4/TiO2-βCD magnetic particles: synthesis and application in solar photocatalysis for the degradation of orange dye II

Espinoza-Castañeda¹,

Medina²,

Larios³

et al. 2022

JER

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Water pollution is one of the most important problems in our days, the wastewater discharged by the textile industry exemplifies this problem because high concentrations of colorants and other organic compounds (additives, surfactants, etc.) have been reported from of this sector in aquatic ecosystems. The colorants in water bodies are slowly degraded, generating byproducts of greater toxicity that are easily bioaccumulative, consequently dissolved oxygen is reduced, and biogeochemical cycles are altered, affecting organisms at different trophic levels. The results obtained from the photocatalytic evaluation of Fe 3 O 4 and the Fe 3 O 4 /TiO 2 and Fe 3 O 4 /TiO 2 -βCD complexes indicated that Fe 3 O 4 is the material that degrades in the highest percentage to the orange II azo dye, under a process of exposure to natural sunlight, in addition to showing adequate recoverability and reuse efficiency. Fe 3 O 4 was synthesized by a simple precipitation technique, shows a particle size of 100.617 ± 42.043 nm, a surface charge of -12.133 ± 0.32 mV, a reflectance of 48.218 ± 0.258% at 900 nm wavelength and bandgap energy of 2.95 eV. The experiments related to the reuse of Fe 3 O 4 for 5 cycles indicated that it maintained adequate efficiency, since the degradation percentages remained above 90% for up to three consecutive cycles. However, for the fourth and fifth cycles, the percentages of degradation obtained were lower, these being 86.925 ± 0.407% and 78.119 ± 1.770%, respectively. Thanks to its paramagnetic properties, the easy recovery through the use of a magnet and the degradation percentages obtained, the synthesized Fe 3 O 4 proves to be an alternative for the environmental restoration of contaminated water, this textile dye in areas with optimal solar radiation conditions.

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Textile Wastewater Treatment Using Iron-Modified Clay and Copper-Modified Carbon in Batch and Column Systems

Cited by 29 publications

References 28 publications

Textile Effluent Treatment Using Natural Coagulant Opuntia stricta in Comparison with Alum

Textile Effluent Treatment Using Natural Coagulant Opuntia stricta in Comparison with Alum

A critical review of textile industry wastewater: green technologies for the removal of indigo dyes

Fe3O4/TiO2-βCD magnetic particles: synthesis and application in solar photocatalysis for the degradation of orange dye II

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