Self-regenerating photocatalytic hydrogel for the adsorption and decomposition of methylene blue and antibiotics in water

Pardo, Andrew; Garcia, Homero; Ramirez, Paulette; Carrillo‐Alvarado, Miguel Angel; Krishna, Katla Sai; Dominguez, Noemi; Islam, Tariqul; Wang, Huiyao; Noveron, Juan C.

doi:10.1016/j.eti.2018.06.005

Cited by 28 publications

(16 citation statements)

References 25 publications

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“…Organic dyes are among the main pollutants in wastewater due to their increasing use, to the point that organic dyes have become a problem of public interest. 1 It is estimated that approximately 700 000 tons of organic dyes are produced annually, and approximately 15% of these dyes are discarded in the production process, resulting in the subsequent contamination of water sources. 2 There are different types of colorants, which can be classied according to the characteristics of the chromophore.…”

Section: Introductionmentioning

confidence: 99%

Magnetic methacrylated gelatin-g-polyelectrolyte for methylene blue sorption

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Magnetic methacrylated gelatin-g-polyelectrolyte for methylene blue sorption

et al. 2020

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“…4, and Freundlich eq. 5) [24] were tested in the fitting of the degradation data of Sandocryl dye by Ca-ALG/Ag nanocomposite beads titanium [25] [26]. , , are the Langmuir, Freundlich, and Timken, adsorption equilibrium constants, respectively; and are the equilibrium concentration, and the adsorption capacity, respectively.…”

Section: Isothermal Studymentioning

confidence: 99%

Radiation Induced Silver Nanoparticles in Ionically Crosslinked Alginate Beads for Efficient Catalytic Degradation of Basic Dye

Taleb

Fadl

Albalwi

et al. 2021

Preprint

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Silver nanoparticles (Ag NPs) are widely used as engineered nanomaterials in many advanced nanotechnologies, due to their versatile, easy and cheap preparations combined with peculiar chemical-physical properties. Their increased production and integration in environmental applications including water treatment raise concerns for their impact on humans and the environment. In this study, gamma radiation dose of 20 kGy was utilized to induce the synthesis silver nanoparticles (Ag NPs) in the alginate micro beads to prepare calcium Alginate/Ag (Ca-ALG/Ag) nanocomposite beads. These beads were then used to degrade toxic basic dyes in waste water. Initially, Ca-ALG /Ag nanocomposite beads were synthesized and characterized using Ultra Violet-visible spectrum (UV-Vis), Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD) and Transmission Electron Microscope (TEM) for confirming the formation of Ag NPs and morphological study. The catalytic efficiency of the resulting Ca-ALG/Ag nanocomposite beads is evaluated for the degradation of dyes such sandocryl blue dye in the presence of NaBH4. The catalytic degradation of sandocryl blue dye was very fast in the present conditions: 0.1 g of catalyst 5 ml NaBH4 and the optimum time for complete reduction was 30 min. The pseudo-first order, pseudo second order and intra particle diffusion model used to evaluate the kinetic models and the mechanism of the degradation. Results showed that the degradation kinetics best fit the pseudo-second-order model and Langmuir isotherm model. The Biopolymer-based nanocomposite beads of calcium alginate, and Ag NPs can be applied to reduce dyestuff, where it is economically viable and environmentally friendly.

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“…[35] These isothermal models were tested for the fitting of the degradation data of basic blue 3 dye by Ca-ALG/Ag nanocomposite beads. [36,37] K α , K F , and K T are the Langmuir, Freundlich, and Timken adsorption equilibrium constants, respectively; C e and q e are the equilibrium concentration and the adsorption T A B L E 1 Kinetic and isothermal parameters of the catalytic degradation of basic blue 3 dye by Ca-ALG/Ag nanocomposite beads…”

Section: Isothermal Studymentioning

confidence: 99%

Catalytic activity of silver nanocomposite alginate beads for degradation of basic dye: Kinetic and isothermal study

Albalwi

Fadl

Ibrahim

et al. 2021

Applied Organom Chemis

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As the removal of toxic dyes by catalytic degradation is interestingly growing field, diverse types of nanomaterials are used intensively as a catalyst to enhance the catalytic degradation of toxic dyes in the last decades. The unique property of ionic crosslinking of the biopolymer sodium alginate (Na-ALG) in presence of CaCl 2 solution is exploited to prepare Ca-alginate (Ca-ALG) microbeads, which further used as precursor for in situ silver nanoparticles (Ag NPs) formation by the effect of gamma radiation to obtain Ca-ALG/Ag nanocomposite beads. The amount of silver ions adsorbed by the Ca-ALG beads before reduction was evaluated by using ultraviolet-visible spectrophotometer (UV-Vis). The physicochemical properties of prepared Ca-ALG/Ag nanocomposite beads were studied by various techniques as X-ray diffraction (XRD) and transmission electron microscopy (TEM) for approving the creation of Ag NPs and assessing its morphology and particle magnitude. The catalytic reduction ability of the resulting Ca-ALG/Ag nanocomposite beads is studied toward the degradation of basic blue 3 dye as a model anionic dye by the aid of the reducing agent NaBH 4 under various factors including time, pH, catalyst's dosage, NaBH 4 contents, and dye's initial concentration. Various kinetics and isothermal models were applied for forecasting the mechanism of the degradation process using the prepared catalyst beads. The kinetics and isothermal study revealed that the degradation process using Ca-LG/Ag nanocomposite beads as a catalyst in presence of NaBH 4 as a reducing agent was best fit the pseudo-second-order model and Langmuir isotherm model.

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Self-regenerating photocatalytic hydrogel for the adsorption and decomposition of methylene blue and antibiotics in water

Cited by 28 publications

References 25 publications

Magnetic methacrylated gelatin-g-polyelectrolyte for methylene blue sorption

Magnetic methacrylated gelatin-g-polyelectrolyte for methylene blue sorption

Radiation Induced Silver Nanoparticles in Ionically Crosslinked Alginate Beads for Efficient Catalytic Degradation of Basic Dye

Catalytic activity of silver nanocomposite alginate beads for degradation of basic dye: Kinetic and isothermal study

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