Textile Dyeing Wastewater Research Articles

Preparation and Characterization of Recycled PP/Organo-Clay Filter for Dyeing Ability

Organo-modified clay was used to prepare waste polypropylene/clay composite by melt mixing method. Composites were then melt spun into linear filaments. Attention is given to how the organoclay influence the morphology and the dyeability of resultant waste PP filaments. Scanning electron microscopy was used to investigate the surface morphology and cross section of the filaments. Dyeing studies underlined the improvement of dye affinity of elaborated filaments to acid, basic, and disperse dyes. Moreover, we observed that waste PP and its composite monofilaments have the highest dyeability when using disperse dye. The prepared filaments were then used to fulfill a filter for the treatment of textile dye waste water. Thus, 3D geometrical design of the filter structure was realized by the SolidWorks mechanical design software.

Hydrothermal route for the synthesis of manganese ferrite nanoparticles and photocatalytic activity evaluation for the degradation of methylene blue dye

Abstract Manganese ferrite (MnFe2O4) was prepared via hydrothermal route and characterized by advanced techniques. The photocatalytic activity (PCA) was evaluated by degrading methylene blue (MB) dye under UV irradiation. The effect of process variables such as catalyst dose, UV exposure time and pH was studied for maximum degradation of dye at optimum conditions. The MnFe2O4 showed face centered cubic structure and average particle size of 23.98 nm. The lattice constant, lattice strain, ionic radii (rA & rB), bonding angles and hoping lengths of MnFe2O4 were recorded to be 0.8467 nm, 0.08, 1.66, 0.766, 1.833 and 2.116 Å, respectively. The MnFe2O4 showed promising PCA and at optimum conditions of process variable, up to 99% MB dye degradation was achieved. The PCA was found dependent to catalyst dose, UV exposure time and pH. Results revealed that the hydrothermal rout is feasible route for the preparation of MnFe2O4 ferrite in nano size and the PCA revealed the potential application of MnFe2O4 ferrite to degrade dye in textile wastewater.

Photocatalytic degradation of textile dyeing wastewater under visible light irradiation using green synthesized mesoporous non-metal-doped TiO2

Photocatalytic degradation of textile dyeing wastewater under visible light irradiation using green synthesized mesoporous non-metal-doped TiO2

Treatment of Biorefractory Organic Compounds in Dyeing and Printing Process Textile Wastewater with Electron Beam Radiation

Abstract The biodegradability improvement of simulated textile dyeing (reactive), printing, and overall wastewater was carried out by electron beam (e-beam) radiation for an activated sludge proces...

Kinetic studies of Congo red dye adsorption by immobilized Aspergillus niger on alginate

Releasing of dye-containing wastewater by the textile industry into general water bodies can adversely affect aquatic ecosystems and human health. The objective of this study is to assess the Congo red dye biodegradation and detoxification by immobilized Aspergillus niger obtained from textile dye wastewater. The effects of process parameters like pH, temperature, reaction time and initial concentration on Congo red degradation were studied. Equilibrium adsorption isotherms, kinetics and thermodynamics were also investigated. The experimental data were analyzed by the Langmuir, Freundlich and Temkin models of adsorption. The adsorption isotherm data fitted well to Langmuir isotherm and the kinetic data fitted well to the pseudo-second-order model. The degraded metabolites of Congo red were characterized by using UV–Vis spectrophotometer, Fourier transform infrared spectroscopy and high-performance liquid chromatography, further confirmed that biodegradation of Congo red was due to reduction of the azo bond. Phytotoxicity test confirmed that degradation metabolites were a less toxic than original dye. The reusability of the immobilized Aspergillus niger was repeated with six cycles and removal efficiency ranged from 98 to 72%. The results in this study substantiate that immobilized Aspergillus niger could be employed as a good adsorbent for the removal of Congo red dye from wastewater.

Dopamine-decorated lotus leaf-like PVDF/TiO2 membrane with underwater superoleophobic for highly efficient oil-water separation

Oil and organic pollutants removal becomes an efficient solution to dispose of industrial oily and textile dye wastewater. This study proposes a lotus leaf-like bionic nanofibrous membrane with underwater superoleophobic for highly efficient oil-water separation. Papillary structure of the bionic membrane is formed by electrospraying of PVDF and TiO2 solutions on the surface of beaded-structure PVDF/TiO2 membrane. Dopamine is then decorated on the resultant PVDF/TiO2 membrane by in situ polymerization to be with hydrophilic-underwater oleophobic property for highly efficient oil-water separation. This bionic membrane has > 99 % oil-water separation efficiency, and high flux of 1389 ± 67 L m−2 h−1. Its contact angle of underwater petroleum ether and dichlomethane reaches 155° and 152°, respectively. Moreover, it has excellent water transport capacity, photocatalytic property, as well as high separation efficiency and flux even after 5-cycle filtration. This bionic nanofibrous membrane will become a promising candidate in clean production, industrial oil/water separation, water purification and efficient liquid transmission.

Synthesis and application of molecular imprinted polymers for online monitoring of textile dyes in wastewater

Synthesis and application of molecular imprinted polymers for online monitoring of textile dyes in wastewater

Sunlight-assisted degradation of textile pollutants and phytotoxicity evaluation using mesoporous ZnO/g-C3N4 catalyst.

Accessibility of adequate safe and fresh water for human consumption is one of the most significant issues throughout the world and extensive research is being undertaken to resolve it. Nanotechnology is now an outstanding medium for water treatment and remediation from microorganisms and organic dyes, as compared to conventional treatment methods. For this task graphitic carbon nitride (g-C3N4) is a potential nanomaterial for environmental remediation, but its photogenerated charge carrier recombination rate restricts its use in practical applications. Hence, in the current study, we used a simple one-step calcination method to synthesize various ratios of ZnO/g-C3N4 binary nanocomposites. The band gap of g-C3N4 is 2.70 eV, but it is shifted to 2.60 eV by the 0.75 : 1 ZnO/g-C3N4 binary nanocomposite. Moreover, phase structure, morphology, thermal stability, oxidation state, elemental analysis, and surface area were evaluated using XRD, SEM, TEM, TGA, XPS, and BET analysis. The optimal ZnO loading content was determined and the mechanism of enhanced photocatalytic activity was studied in detail. The photocatalytic efficiency of the best catalyst was employed for the degradation of textile effluent followed by phytotoxicity evaluation using methylene blue (MB), and rhodamine B (RhB) as a model substrate was tested. Furthermore, the textile effluent treatment analysis discovered that the 75 mg concentration of 0.75 : 1 ZnO/g-C3N4 catalyst degraded up to 80% within 120 min and significantly reduced the concentrations of different physico-chemical parameters of textile effluents. These treated effluents have no phytotoxic effects on fenugreek plants, according to a pot study. It was found that the mesoporous 0.75 : 1 ZnO/g-C3N4 catalyst can be used as an effective and low-cost technique for the degradation of azo dyes in textile wastewaters.

Treatment of textile dyeing wastewater using advanced photo-oxidation processes for decolorization and COD reduction

Treatment of textile dyeing wastewater using advanced photo-oxidation processes for decolorization and COD reduction

Allochthonous and Autochthonous Halothermotolerant Bioanodes From Hypersaline Sediment and Textile Wastewater: A Promising Microbial Electrochemical Process for Energy Recovery Coupled With Real Textile Wastewater Treatment.

The textile and clothing industry is the first manufacture sector in Tunisia in terms of employment and number of enterprises. It generates large volumes of textile dyeing wastewater (TDWW) containing high concentrations of saline, alkaline, and recalcitrant pollutants that could fuel tenacious and resilient electrochemically active microorganisms in bioanodes of bioelectrochemical systems. In this study, a designed hybrid bacterial halothermotolerant bioanode incorporating indigenous and exogenous bacteria from both hypersaline sediment of Chott El Djerid (HSCE) and TDWW is proposed for simultaneous treatment of real TDWW and anodic current generation under high salinity. For the proposed halothermotolerant bioanodes, electrical current production, chemical oxygen demand (COD) removal efficiency, and bacterial community dynamics were monitored. All the experiments of halothermotolerant bioanode formation have been conducted on 6 cm2 carbon felt electrodes polarized at −0.1 V/SCE and inoculated with 80% of TDWW and 20% of HSCE for 17 days at 45°C. A reproducible current production of about 12.5 ± 0.2 A/m2 and a total of 91 ± 3% of COD removal efficiency were experimentally validated. Metagenomic analysis demonstrated significant differences in bacterial diversity mainly at species level between anodic biofilms incorporating allochthonous and autochthonous bacteria and anodic biofilm containing only autochthonous bacteria as a control. Therefore, we concluded that these results provide for the first time a new noteworthy alternative for achieving treatment and recover energy, in the form of a high electric current, from real saline TDWW.

Catalytic oxidation over nanostructured heterogeneous process as an effective tool for environmental remediation

Industrialization has led to a severe deterioration in water quality. Textile industry is considered a huge consumer of water in Egypt; the result is generating large amounts of dye-containing wastewater that is essential to be treated before the final disposal. However, searching for efficient treatment is an important aspect for a sustainable environment. Advanced oxidation processes (AOPs) have been emerged as efficient techniques for industrial wastewater remediation. Among the AOPs, Fenton based reactions is considered a promising process for its simplicity in application and cost-efficient with high process efficiency. In this study, heterogeneous Fenton reaction using magnetite nanoparticles induced by ultraviolet radiation (UV) was applied as a green technology pathway for textile dyeing wastewater oxidation. Nanostructured magnetite was successfully obtained by co-precipitation technique that is used as the precursor of the Fenton’s reaction process. The heterogeneous iron (Fe2+/Fe3+) supported catalyst with hydrogen peroxide (H2O2) was used as a coupled Fenton and Fenton-like oxidation system for methylene blue dye removal in aqueous media. The obtained results investigated that the dye oxidation rate increases with decreasing pH to 3.0. However, increasing H2O2 and magnetite (Fe3O4) nanoparticles catalyst results in an increase in the dye oxidation rate and the optimum operating values were 80 and 1600 mg/L for Fe3O4 and H2O2, respectively. By optimizing the amount of reagents, process conditions as well, the results revealed that magnetite was considered an efficient Fenton-based catalyst for dye oxidation that is reached to 94% within 3 hr of oxidation time. Finally, magnetite catalyst could be easily recovered by magnetic separation to confirm the process sustainability.

Anaerobic-aerobic processes for the treatment of textile dyeing wastewater containing three commercial reactive azo dyes: Effect of number of stages and bioreactor type

In this study, the effect of number of stages and bioreactor type on the removal performance of a sequential anaerobic–aerobic process employing activated sludge for the treatment of a simulated textile dyeing wastewater containing three commercial reactive azo dyes was considered. Two stage processes performed better than one stage ones, both in terms of overall organic and color removal, as well as the higher contribution of anaerobic stage to the overall removal performance, thereby making them a more energy efficient option. The employment of a moving bed sequencing batch biofilm reactor, which uses both suspended and attached biomass, for the implementation of the anaerobic stage of the process, was compared with a sequencing batch reactor that only employs suspended biomass. The results showed that, although there was no meaningful difference in biomass concentration between the two bioreactors, the latter reactor had better performance in terms of chemical oxygen demand (COD) removal efficiency and rate and color removal rate. Further exploratory tests revealed a difference between the roles of suspended and attached bacterial populations, with the former yielding better color removal whilst the latter had better COD removal performance. The sequential anaerobic–aerobic process, employing an aerobic membrane bioreactor in the aerobic stage resulted in COD and color removal of 77.1 ± 7.9% and 79.9 ± 1.5%, respectively. The incomplete COD and color removal was attributed to the presence of soluble microbial products in the effluent and the autoxidation of dye reduction metabolites, respectively. Also, aerobic partial mineralization of the dye reduction metabolites, was experimentally observed.

Application of electrospun Polyamide-6/Modified zeolite nanofibrous composite to remove Acid Blue 74 dye from textile dyeing wastewater

Textile industry produces huge amounts of wastewater containing synthetic dyes and impurities. Contaminants include toxic dyes, which can be found in dyeing wastewater. In textile industry, various dyes such as acid, basic, reactive, disperse are used for dyeing. The aim of this study was to evaluate adsorption of Acid Blue 74 by electrospun PA-6/Modified zeolite nanofibrous composite. Design of the Response Surface Method (RSM) of Box-Behnken model (BBD) was used to determine the optimal conditions for the removal of Acid Blue 74. The effect pH, temperature, stirring speed, dye concentration, and adsorbent dose were investigated. The investigation of kinetic and isotherm model showed that the reaction kinetics follows the pseudo-second-order model and the PA-6/Modified zeolite nanofibrous composite adsorption process follows the Freundlich model. As a result, the PA-6/Modified zeolite nanofibrous composites can be considered as an effective material in removing Acid Blue 74 from wastewater.

Properties of recycled PP/clay filaments used for simulation of wastewater treatment filter

This article deals with the design of a filter, for the treatment of textiles dyeing effluents, from recycled polypropylene (rPP) polymer reinforced with clay particles. First, rPP/clay composites were melt spun into linear filaments. Then these filaments were used to fulfill a new designed filter for the treatment of textile dyeing wastewater. Thermogravimetric analysis showed that the addition of organo-modified clay to rPP filaments allows better thermal stability. We deduced from the differential scanning calorimetry analysis that the addition of nanoclay increases the crystallization temperature of the filament. Mechanical properties of the rPP melt spun filaments were investigated. The stress–strain and bending tests showed that the mechanical properties of the rPP filament were improved by the addition of clay particles. A filter prototype filled with these filaments was then elaborated. Numerical simulations were made to study the mechanical response of the filter as a function of the pressure exerted by the dyeing effluent.

Enhanced Decolorization and Treatment of Textile Dye Wastewater Through Adsorption on Acid Modified Corncob Derived Biochar

AbstractEco‐friendly biochar derived from the cost‐effective and easily accessible agricultural waste corncob has been utilized as an adsorbent for decolorization of real textile dye wastewater (RTDW). Slow pyrolysis of the corncob was done in a temperature range of 450–550 °C with a consistent heating rate to produce biochar. The biochar yield reduced with increasing temperature of pyrolysis. Chemical treatment of biochar (BC) with sulfuric acid was done to improve the adsorption efficiency. Batch studies were carried out for decolorization of RTDW by varying key reaction parameters in order to further optimize these ones. Significantly high decolorization efficiency of up to 98 % was obtained using acid modified biochar (MBC). The maximum adsorption of dyes with MBC was found to be 6.02 mg g−1 in 45 minutes at ambient temperature. Advance analytics including Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and Zeta Potential etc. were carried out to characterize the adsorbents and to see the changes during the pyrolysis and adsorption processes. The kinetic studies demonstrated that Lagergren's pseudo‐II order model was the best fit for both BC and MBC. Also, MBC showed good recyclability as adsorbent when used two more times after degeneration. The germination % of Vigna radiata L. was studied to evaluate the toxicity of the effluents which depicted that dye wastewater after the adsorption by MBC was safe for agricultural use.

Modification of high content nanocluster-based coagulation for rapid removal of dye from water and the mechanism

Simultaneous removal of poorly biodegradable synthetic dyes and associated suspended particles, like a textile effluent, is a common challenge in the water treatment sector. Herein, a method based on sodium dodecyl sulfate (SDS) as a sorbet to modify fresh aggregate of polycationic nanocluster (Al30) was developed for the simultaneous removal of dyes and suspension from the water by one-step treatment. The FT-IR, TEM and Zeta potential analysis revealed that dodecyl sulfate (DS) was favorably adsorbed onto the fresh aggregates of Al30, which was found to follow Langmuir isotherm (R2 = 0.988) rather than Freundlich model (R2 = 0.726). The negative ΔG0ads (−29.3) and RL value (0.1535), between 0 and 1, further corroborated the spontaneous SDS condensation on the Al30 aggregates. In the treatment of dye wastewater, the target dyes and turbidity were removed more than 95% at pH 8, concomitant with DS adsorption. The linear relation between Xadm and Xbul (R2 = 0.99) described the classical partitioning of dyes into the modified surface, which was further confirmed by TEM-EDX investigation and online fluorescence image. The simultaneous removal of concentrated dye and suspension suggests the applicability of this method for a textile and other dye wastewater treatment alternative.

Construction of a novel cold-adapted oleaginous yeast consortium valued for textile azo dye wastewater processing and biorefinery

A new lipid-accumulating and cold-adapted oleaginous yeast consortium MG-Y-SH which stands for molecularly identified species Meyerozyma guilliermondii, Yarrowia sp. and Sterigmatomyces halophilus was successfully constructed in this study. Its total saturated fatty acid content (34.64 ± 0.95%) was higher than that of jatropha oil (21.52%). The oil obtained from oleaginous yeast consortium MG-Y-SH is advantageous for biodiesel production, since it contains low amount (21.48 ± 1.1%) of polyunsaturated fatty acids (C18:2 and C18:3). Lipase, which is a biocatalyst for the production of biodiesel by oleaginous yeasts, reached its highest specific activity of 8.35 ± 0.14 U/mg (extracellular) and 7.901 ± 0.12 U/mg (intracellular) after 36 h of incubation compared to the individual strains. Seven dye mixtures, six dyes in each group, were constructed and the maximum decolorization efficiency ranged between 55.81% (mixture III) and 80.56% (mixture VI) within 24 h of treatment with MG-Y-SH at 18 °C and under static conditions. The maximum decolorization efficiency by MG-Y-SH reached 100% at 100 mg/L Reactive Red 120 (RR120) within 3 h. Based on our investigation and analysis on those metabolites drawn from the mass spectrum as well as various induced enzymes, a possible dye biodegradation pathway linked to fatty acid synthesis was proposed. The results of phytotoxicity indicate a capability of MG-Y-SH in converting the toxic azo dye RR120 into some non-toxic metabolites, suggesting MG-Y-SH as a promising multipurpose oleaginous yeast consortium suitable for biodiesel production in the future, while degrading recalcitrant dyes and lignin valorization in cold environments.

Decolourization of azo, anthraquinone and triphenylmethane dyes using aerobic granules: Acclimatization and long-term stability

The long-term stability of aerobic granules is critical for decolourization of different dyes in textile wastewater. Here, we investigated dye decolourization and the stability of acetate-cultivated granules after exposure to dyes. Results show that granules can maintain excellent structure stability with the presence of azo and triphenylmethane dyes during a 200-day operation period, achieving biomass concentrations as high as 8–12 g L−1 and 90% and 100% decolourization efficiency, respectively. Aerobic granules, however, partially disintegrated after exposure to anthraquinone, resulting in dye decolourization efficiency ranging from 50 to 80% and a biomass concentration as low as around 0.5 g L−1 due to biomass wash-out. The study indicates that long-term granule stability is much dependent on the dye classes. The enrichment of specific species in granules for dye decolourization has not been affected by the granule structure. The specific dye decolourization rate and dye to microorganism ratio for anthraquinone were 5–6.5 and 13.5–16.4 times, respectively, higher than those for azo and triphenylmethane dyes, but the total reactor performance for anthraquinone decolourization is much poorer than azo and triphenylmethane dyes due to low biomass retention in the reactor. The results suggest the importance of stability of aerobic granules for biomass retention to achieve better treatment performance of dye-containing wastewater. For the first time, the long-term stability and decolourization performance of aerobic granules for treating anthraquinone and triphenylmethane dyes are reported here and compared with azo dye, which can be used to guide the treatment of real textile wastewater containing azo, anthraquinone and triphenylmethane dyes by aerobic granules.

Textiles wastewater treatment technology: A review.

The following is a review of published literature on textile wastewater in 2019. Presented are the sections described for the review: concise introduction on the textiles wastewater, followed by a review of present textile treatment technologies organized by physicochemical, biological, and combined processes. Lastly, a discussion of the future topics is presented. PRACTITIONER POINTS: The discharge of textile dye wastewater represents a serious environmental problem and public health concern. Effluents from textile manufacturing, dyeing, and finishing processes contain high-concentration recalcitrant chemicals that are resistant to biodegradation. The textile wastewater needs environmental-friendly and cost-effective combined treatment process.

Bio-waste chicken eggshell-derived calcium oxide for photocatalytic application in methylene blue dye degradation under natural sunlight irradiation

The development of nontoxic bio-waste based catalyst for efficient recycling of textile dye wastewater to potable water is paramount to support a sustainable environment. This research work investigated a crystallographic evolution of CaO from the chicken eggshell wastes via a simple calcination process for the photocatalytic degradation of the methylene blue dye. The physicochemical properties of the activated CaO catalyst were studied using characterization techniques such as X-ray diffraction (XRD), Raman spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, ultraviolet-visible (UV-Vis) spectroscopy, and scanning electron microscope (SEM). The crystallite size was estimated as ∼55 nm for the prepared CaO. The sharp bands at 358 cm−1 and the broad band at 675 cm−1 in the Raman spectroscopic analysis have revealed a function attributed to the Ca–O bonds. The energy band gap of prepared CaO was calculated by the Tauc equation using the UV-visible reflectance spectrum. The estimated energy band gap has a maximum value of 5.54 eV. However, a lower bandgap 2.27 eV was also estimated. SEM micrograph revealed the multi-arm/angular and rod-shaped microstructure with a width of 1–2 µm of the arm. The ring-shaped appearance encouraged the porous behavior of the prepared CaO. The photocatalytic activity of the prepared CaO was performed for the degradation of the methylene blue dye in distilled water under natural sunlight in the ambient environment. The maximum photocatalytic degradation efficiency was observed as ∼ 98% in 180 min. The research work incites the possible realistic application of bio-waste based inexpensive photocatalysts for textile/industrial wastewater remediation.