Feasibility of nanoscale zero-valent iron (nZVI) for enhanced biological treatment of organic dyes

Liu, Jing; Liu, Airong; Wang, Wei; Li, Ruofan; Zhang, Wei‐xian

doi:10.1016/j.chemosphere.2019.124470

Cited by 48 publications

(7 citation statements)

References 34 publications

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“…Currently, there are wide ranges of treatments used in the industry for removing dye in wastewater, such as biological treatment [ 8 , 9 , 10 ], fenton oxidation [ 11 , 12 ], membrane separation [ 13 , 14 ] and physiochemical treatment [ 15 , 16 ]. However, these methods pose a few major drawbacks, such as their high operation cost, larger formation of sludge, time consuming (long retention time) and the production of toxic by-products [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

Integrated Membrane–Electrocoagulation System for Removal of Celestine Blue Dyes in Wastewater

et al. 2020

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The textile industry provides for the needs of people especially in apparel and household items. The industry also discharges dye-containing wastewater that is typically challenging to treat. Despite the application of the biological and chemical treatments for the treatment of textile wastewater, these methods have their own drawbacks such as non-environment friendly, high cost and energy intensive. This research investigates the efficiency of the celestine blue dye removal from simulated textile wastewater by electrocoagulation (EC) method using iron (Fe) electrodes through an electrolytic cell, integrated with nylon 6,6 nanofiber (NF) membrane filtration for the separation of the flocculants from aqueous water. Based on the results, the integrated system achieves a high dye removal efficiency of 79.4%, by using 1000 ppm of sodium chloride as the electrolyte and 2 V of voltage at a constant pH of 7 and 10 ppm celestine blue dye solution, compared to the standalone EC method in which only 43.2% removal was achieved. Atomic absorption spectroscopy analysis was used to identify the traces of iron in the residual EC solution confirming the absence of iron. The EC-integrated membrane system thus shows superior performance compared to the conventional method whereby an additional 10–30% of dye was removed at 1 V and 2 V using similar energy consumptions.

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Section: Introductionmentioning

confidence: 99%

Integrated Membrane–Electrocoagulation System for Removal of Celestine Blue Dyes in Wastewater

et al. 2020

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“…Over the past years, nano zero-valent iron (NZVI) has been reported to be a promising nanomaterial for the treatment of chlorinated phenols in wastewater, drinking water, and groundwater because of its large specific surface area, excellent adsorption, low redox potentials, small particle size, and high reaction activity [8][9][10][11]. In fact, the NZVI is applied for the removal of various pollutants in water, such as dye, antibiotics, chlorophenols, organic pollutants, and heavy metals [12][13][14]. However, there are still some technical challenges that hinder their large-scale practical applications.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Pluronic F-127 Modification on Nano Zero-Valent Iron (NZVI): Sedimentation and Reactivity with 2,4-Dichlorophenol in Water Using Response Surface Methodology

Zhang

Jing

et al. 2020

Catalysts

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Nano zero-valent iron (NZVI) is widely used for reducing chlorinated organic pollutants in water. However, the stability of the particles will affect the removal rate of the contaminant. In order to enhance the stability of nano zero-valent iron (NZVI), the particles were modified with F-127 as an environmentally friendly organic stabilizer. The study investigated the effect of the F-127 mass ratio on the colloidal stability of NZVI. Results show that the sedimentation behavior of F-NZVI varied at different mass ratios. A biphasic model was used to describe the two time-dependent settling processes (rapid sedimentation followed by slower settling), and the settling rates were calculated. The surface morphology of the synthesized F-NZVI was observed with a scanning electron microscope (SEM), and the functional groups of the samples were analyzed with Fourier Transform Infrared Spectroscopy (FTIR). Results show that the F-127 was successfully coated on the surface of the NZVI, and that significantly improved the stability of NZVI. Finally, in order to optimize the removal rate of 2,4-dichlorophenol (2,4-DCP) by F-NZVI, three variables were tested: the initial concentration 2,4-DCP, the pH, and the F-NZVI dosage. These were evaluated with a Box-Behnken Design (BBD) of response surface methodology (RSM). The experiments were designed by Design Expert software, and the regression model of fitting quadratic model was established. The following optimum removal conditions were determined: pH = 5, 3.5 g·L−1 F-NZVI for 22.5 mg·L−1 of 2,4-DCP.

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“…A very interesting potential application for nZVIs was described by Zhang et al [47] who examined the efficacy of such nanoparticles for the pretreatment of wastewater before their processing in bioreactors. It was reported that zero-valent iron nanoparticles (average size,~40 nm), generated through a sodium borohydride reduction, could reduce the water-soluble dye molecule Congo red into waste products which could then be readily consumed by bacteria in membrane bioreactors.…”

Section: Zerovalent Iron Nanoparticlesmentioning

confidence: 99%

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

Govan

2020

Magnetochemistry

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Water resources are of extreme importance for both human society and the environment. However, human activity has increasingly resulted in the contamination of these resources with a wide range of materials that can prevent their use. Nanomaterials provide a possible means to reduce this contamination, but their removal from water after use may be difficult. The addition of a magnetic character to nanomaterials makes their retrieval after use much easier. The following review comprises a short survey of the most recent reports in this field. It comprises five sections, an introduction into the theme, reports on single magnetic nanoparticles, magnetic nanocomposites containing two of more nanomaterials, magnetic nanocomposites containing material of a biologic origin and finally, observations about the reported research with a view to future developments. This review should provide a snapshot of developments in what is a vibrant and fast-moving area of research.

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Feasibility of nanoscale zero-valent iron (nZVI) for enhanced biological treatment of organic dyes

Cited by 48 publications

References 34 publications

Integrated Membrane–Electrocoagulation System for Removal of Celestine Blue Dyes in Wastewater

Integrated Membrane–Electrocoagulation System for Removal of Celestine Blue Dyes in Wastewater

The Influence of Pluronic F-127 Modification on Nano Zero-Valent Iron (NZVI): Sedimentation and Reactivity with 2,4-Dichlorophenol in Water Using Response Surface Methodology

Recent Advances in Magnetic Nanoparticles and Nanocomposites for the Remediation of Water Resources

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