Removal of Dyes and Cd2+ in Water by Kaolin/Calcium Alginate Filtration Membrane

Zhao, Yujie; Liu, Xiaowei; Qi, Meng; Bai, Tian; Zhao, Kongyin; Zhang, Xinxin

doi:10.3390/coatings9040218

Cited by 13 publications

(5 citation statements)

References 33 publications

(41 reference statements)

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“…Similarly, Habiba et al 43 successfully employed electro spun chitosan/polyvinyl alcohol/TiO 2 nanofiber for the removal of Congo red and methyl orange from water. Zhao et al 44 proposed kaolin/calcium alginate membrane as a suitable adsorbent for the removal of toxic dye (brilliant blue G250, Congo red, and methylene blue). The membrane exhibits removal rate of 100%, 95.22%, and 62.86%, respectively for brilliant blue G250, Congo red, and methylene blue.…”

Section: Introductionmentioning

confidence: 99%

Removal of anionic dye Congo red from aqueous environment using polyvinyl alcohol/sodium alginate/ZSM-5 zeolite membrane

Radoor

Karayil²,

Parameswaranpillai

et al. 2020

Sci Rep

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In this study, a novel PVA/SA/ZSM-5 zeolite membrane with good regeneration capacity was successfully prepared by solvent casting technique. The properties of the membranes were assessed by employing different characterization techniques such as X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), optical microscopy (OP), thermogravimetric analysis (TGA), contact angle and universal testing machine (UTM). XRD, TGA and UTM results revealed that the crystallinity and thermo-mechanical performance of the membrane could be tuned with zeolite content. The successful incorporation of zeolite into the polymer matrix was confirmed by FT-IR, SEM and OP analysis. The adsorption ability of the as-prepared membrane was evaluated with a model anionic dye, Congo red. Adsorption studies show that the removal efficiency of the membrane could be tuned by varying zeolite content, initial concentration of dye, contact time, pH and temperature. Maximum dye adsorption (5.33 mg/g) was observed for 2.5 wt% zeolite loaded membrane, at an initial dye concentration of 10 ppm, pH 3 and temperature 30 °C. The antibacterial efficiency of the membrane against gram-positive (Staphylococcus aureus) and gram-negative bacteria (Escherichia coli) was also reported. The results show that membrane inhibits the growth of both gram-positive and gram-negative bacteria. The adsorption isotherm was studied using two models: Langmuir and Freundlich isotherm. The results show that the experimental data fitted well with Freundlich isotherm with a high correlation coefficient (R2 = 0.998). Meanwhile, the kinetic studies demonstrate that pseudo-second-order (R2 = 0.999) model describe the adsorption of Congo red onto PVA/SA/ZSM-5 zeolite membrane better than pseudo-first-order (R2 = 0.972) and intra particle diffusion model (R2 = 0.91). The experimental studies thus suggest that PVA/SA/ZSM-5 zeolite could be a promising candidate for the removal of Congo red from aqueous solution.

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Section: Introductionmentioning

confidence: 99%

Removal of anionic dye Congo red from aqueous environment using polyvinyl alcohol/sodium alginate/ZSM-5 zeolite membrane

Radoor

Karayil²,

Parameswaranpillai

et al. 2020

Sci Rep

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“…The Kaolin/CaAlg composite hydrogel does not show membrane function in this paper because we did not apply it to membrane filtration. In another article, we reported the filtration performance of the Kaolin/CaAlg membrane . We will further study the influence of the filtration process on dye adsorption.…”

Section: Resultsmentioning

confidence: 98%

“…In another article, we reported the filtration performance of the Kaolin/CaAlg membrane. 51 We will further study the influence of the filtration process on dye adsorption.…”

Section: Characterizations Of the Kaolin/caalg Membranementioning

confidence: 99%

Kaolin/CaAlg Hydrogel Thin Membrane with Controlled Thickness, High Mechanical Strength, and Good Repetitive Adsorption Performance for Dyes

Bai

Zhao

Gao

et al. 2020

Ind. Eng. Chem. Res.

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Kaolin/calcium alginate (Kaolin/CaAlg) composite hydrogel membranes with different thicknesses were prepared using Ca2+ cross-linking. The Kaolin/CaAlg composite hydrogel membrane was characterized by laser scanning confocal microscopy, true color confocal microscopy, three-dimensional ultradepth microscopy, scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The mechanical behaviors of Kaolin/CaAlg composite membranes with different NaAlg concentrations, different Kaolin contents, and different thicknesses were investigated. The adsorption kinetics and isotherms for Coomassie brilliant blue G250, crystal violet, and neutral red dyes on the Kaolin/CaAlg composite membrane were studied. The results showed that the surface of the thin Kaolin/CaAlg membrane contained a greater proportion of Kaolin and had a greater roughness than the thick membrane. The adsorption capacity of the composite membrane was enhanced by adding Kaolin powder. The Kaolin/CaAlg membrane exhibited a fast adsorption rate, high adsorption capacity, good reusability, and initial adsorption capacity as high as 89.2 wt % even after five times.

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“…However, the three-dimensional CGH network structure with enhanced graphene surface area and interconnected porous channels has the advantages of free separation, high capacity adsorption and photocatalytic reduction to remove MB from aqueous solutions. 45 TGA curves of GO, ZnO, ZnO-GO, CGH and ZnO-GO/CGH are shown in Fig. S3.…”

Section: Structural and Morphology Analysis Of Zno-go/cghmentioning

confidence: 99%

In situ synthesis of ZnO–GO/CGH composites for visible light photocatalytic degradation of methylene blue

Guo

Zhu

et al. 2019

RSC Adv.

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Removal of Dyes and Cd2+ in Water by Kaolin/Calcium Alginate Filtration Membrane

Cited by 13 publications

References 33 publications

Removal of anionic dye Congo red from aqueous environment using polyvinyl alcohol/sodium alginate/ZSM-5 zeolite membrane

Removal of anionic dye Congo red from aqueous environment using polyvinyl alcohol/sodium alginate/ZSM-5 zeolite membrane

Kaolin/CaAlg Hydrogel Thin Membrane with Controlled Thickness, High Mechanical Strength, and Good Repetitive Adsorption Performance for Dyes

In situ synthesis of ZnO–GO/CGH composites for visible light photocatalytic degradation of methylene blue

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