Heavy metals and color retention by a synthesized inorganic membrane

Chougui, A.; Zaiter, K.; Belouatek, Aissa; Asli, Boubekeur

doi:10.1016/j.arabjc.2012.11.017

Cited by 24 publications

(6 citation statements)

References 27 publications

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“…Separation of heavy metal ions from aqueous solution is one of the popular issues in environmental and industrial fields because of its increasing discharge and toxicity. Wastewater containing heavy metal ions is produced mainly by traditional industry such as battery manufacturing, electroplating, mining, and automotive and chemical processes . Traditional methods such as adsorption‐ion exchange and electrochemical processes have been widely used .…”

Section: Introductionmentioning

confidence: 99%

Preparation of a novel modified ceramic membrane for removal of nickel ions from aqueous phase

Zeng

Qian

Zhang

et al. 2015

Asia-Pacific J Chem Eng

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A novel modified ceramic membrane (CM-SiO 2 -A) has been prepared with the depositing and grafting technologies for removal of Ni 2+ from aqueous solutions. Firstly, the silica was deposited onto the surface of initial ceramic membrane (CM) by using the in situ hydrolysis deposition method and activated to obtain the silanol groups. Then, 3-[2-(2aminoethylamino)ethylamino]propyl-trimethoxysilane was grafted onto the silica layer to obtain the CM-SiO 2 -A. The CM-SiO 2 -A was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, Fourier transform-infrared spectroscopy, and thermogravimetric analysis. Further, the change of water flux and separation of Ni 2+ were studied by using the modified membrane. Results showed that the water flux of CM-SiO 2 -A was decreased by 84.79% compared with the CM. The CM-SiO 2 -A had a much higher total rejection rate of Ni 2+ (77.24%) than that of the un-grafted membrane (1.02%) at initial Ni 2+ concentration of 10 mg/L and exhibits the potential for separation of low concentration of Ni 2+ from aqueous solutions. Figure 1. Schematic diagram of ceramic membrane modification.Figure 3. SEM images of the surface of ceramic membranes: (a) initial ceramic membrane (CM); (b) ceramic membrane modified by grafting of AAAPTS (CM-SiO 2 -A).

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Section: Introductionmentioning

confidence: 99%

Preparation of a novel modified ceramic membrane for removal of nickel ions from aqueous phase

Zeng

Qian

Zhang

et al. 2015

Asia-Pacific J Chem Eng

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“…Comparable values of adsorption efficiency are achieved with the application of membrane separation processes, i.e., micro-, nano-or ultra-filration or reverse osmosis [118][119][120] in the removal of both classes of contaminants. However, although quite effective, these methods are characterized by elevated maintenance and operation costs and high energy requirements [118,121] which make them unsuitable, especially for small and medium industries.…”

Section: Langmuirmentioning

confidence: 99%

Simultaneous Removal and Recovery of Metal Ions and Dyes from Wastewater through Montmorillonite Clay Mineral

et al. 2019

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The main objective of this work was to evaluate the potential of Montmorillonite nanoclay (Mt), readily and inexpensively available, for the simultaneous adsorption (and removal) of two classes of pollutants: metal ions and dyes. The attention was focused on two “model” pollutants: Ce(III) and crystal violet (CV). The choice is due to the fact that they are widespread in wastewaters of various origins. These characteristics, together with their effect on human health, make them ideal for studies on water remediation. Moreover, when separated from wastewater, they can be recycled individually in industrial production with no or simple treatment. Clay/pollutant hybrids were prepared under different pH conditions and characterized through the construction of the adsorption isotherms and powder X-ray diffraction. The adsorption behavior of the two contaminants was revealed to be significantly different: the Langmuir model reproduces the adsorption isotherm of Ce(III) better, thus indicating that the clay offers a unique adsorption site to the metal ions, while the Freundlich model proved to be the most reliable for the uptake of CV which implies heterogeneity of adsorption sites. Moreover, metal ions do not adsorb at all under acidic conditions, whereas the dye is able to adsorb under all the investigated conditions. The possibility to modulate the adsorption features by simply changing the pH conditions was successfully employed to develop an efficient protocol for the removal and separation of the different components from aqueous solutions mimicking wastewaters.

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“…Freshwater is an increasingly scarce resource that is extensively used in textile wet-processing. The textile industry consumes a large amount of fresh-water in dyeing, rinsing, and the follow-up treatment of textiles. , In textile wet-processing, pad dyeing is a conventional and most commonly used technique for continuous processing, which consumes considerable amounts of water and results in substantial wastewater and high energy consumption . The textile processes of heating, drying, and disposal of excessive water cause 10–99% chemical consumption and more than 50% of the total energy consumption .…”

Section: Introductionmentioning

confidence: 99%

Environment-Friendly High-Efficiency Continuous Pad Dyeing of Non-Shrinkable Wool Fabric by the Silicon Fixation Method without Auxiliary Chemicals

Luo

Zhai

Pei

et al. 2022

ACS Sustainable Chem. Eng.

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Conventional pad dyeing methods rely on auxiliary chemicals and consume high energy and a large amount of water to achieve continuous or semicontinuous pad dyeing. Here, a new continuous pad dyeing method was developed by using decamethylcyclopentasiloxane (D5) as the fixation medium; nonshrinkable wool fabric obtained an incredible fixation rate of up to 99% without auxiliary chemicals in the dyeing process. In this work, the optimal temperature and time of the D5-fixation process was 100 °C for 1 min. Compared with conventional dyed samples, nonshrinkable wool fabric with D5-fixation exhibited a better dye penetrability and higher color-fastness, color strength, and area shrink. Furthermore, the results of XRD, FT-IR spectroscopy, and SEM analyses indicated that D5 has no influence on the surface structure, micro-structures, and color properties of wool fabrics. Also, the wool fabrics exhibited good color properties with reused D5. This new continuous rapid pad dyeing method shows a lower commercial level with reduced consumption and nearly half of the wastewater compared with conventional pad dyeing methods, which has a considerable potential to promote the development of a sustainable continuous pad dyeing technology. D5-fixation has the potential to replace the cold pad-batch and steam fixation and would substantially reduce the environmental footprint and achieve real continuous pad dyeing in the conventional dyeing process.

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Heavy metals and color retention by a synthesized inorganic membrane

Cited by 24 publications

References 27 publications

Preparation of a novel modified ceramic membrane for removal of nickel ions from aqueous phase

Preparation of a novel modified ceramic membrane for removal of nickel ions from aqueous phase

Simultaneous Removal and Recovery of Metal Ions and Dyes from Wastewater through Montmorillonite Clay Mineral

Environment-Friendly High-Efficiency Continuous Pad Dyeing of Non-Shrinkable Wool Fabric by the Silicon Fixation Method without Auxiliary Chemicals

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