Facile preparation of magnetic sodium alginate/carboxymethyl cellulose composite hydrogel for removal of heavy metal ions from aqueous solution

Wu, Sisi; Guo, Juan; Wang, Ying; Huang, Chao; Hu, Yong

doi:10.1007/s10853-021-06044-4

Cited by 68 publications

(15 citation statements)

References 39 publications

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“…The maximum adsorption capacity at 298.15 K obtained from eq is presented in Figure together with the published values for comparison. − ,,, It is obvious that the maximum adsorption capacity of CMC-ECH/PAM hydrogels in this work is better than that of other reported CMC-based composite hydrogels. ,, …”

Section: Resultsmentioning

confidence: 68%

“…Nowadays, there exist numerous approaches used to remove heavy metal ions, for example, ion exchange, chemical precipitation, membrane filtration, electrochemical degradation, adsorption, etc. − Among them, adsorption has been proposed as an excellent treatment process, and low-cost and more efficient adsorbents are vital . Polymer hydrogels as adsorbents have been widely employed in the removal of contaminants from wastewater, such as dyes, pesticides, heavy metal ions, and so on. , Cellulose-based hydrogels exhibit excellent performance in the removal of heavy metal ions owing to the plentiful hydroxyl (-OH) group. , Sodium carboxymethyl cellulose (CMC), as a derivative of cellulose, has been extensively investigated due to its water-solubility. − …”

Section: Introductionmentioning

confidence: 99%

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Carboxymethyl Cellulose-Based Composite Polymer Hydrogels Cross-Linked with Epichlorohydrin and Application for Cu(II) Removal

Han

Cao

et al. 2023

ACS Appl. Polym. Mater.

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In this work, CMC-ECH/PAM hydrogels with perfect compressive strength were prepared by epichlorohydrin (ECH) cross-linking sodium carboxymethyl cellulose (CMC) grafted with polyacrylamide (PAM) to remove the copper ion (Cu2+) from water. The chemical and structural morphology of the product was confirmed by Fourier transform infrared spectroscopy and scanning electron microscopy, respectively. The compressive strength was measured by successive compression–decompression cycles and up to 70 kPa. Adsorption was studied at different pH values 1–5, adsorbent doses (0.2–8) g/L, and initial Cu2+ concentrations from (50 to 400) mg/L to obtain the optimum conditions for maximum removal of Cu2+. The experimental adsorption data were well fitted by the pseudo-second-order kinetics model, Langmuir isotherm model, and Freundlich isotherm model. The maximum adsorption capacity calculated by the Langmuir model was 75.930 mg/g at 338.15 K. In addition, the negative ΔG° and positive ΔH° also indicated that the adsorption of Cu2+ is a spontaneous, endothermic, and chemical process. The adsorption mechanism was further verified by X-ray photoelectron spectroscopy analysis. CMC-ECH/PAM hydrogels also exhibited excellent reusability after five adsorption–desorption cycles, maintaining about 80% Cu2+ removal efficiency.

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Section: Resultsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Carboxymethyl Cellulose-Based Composite Polymer Hydrogels Cross-Linked with Epichlorohydrin and Application for Cu(II) Removal

Han

Cao

et al. 2023

ACS Appl. Polym. Mater.

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“…Godiya et al [ 126 ] applied hydrogel composites consisting of CMC incorporating polyacrylamide to absorb Cu 2+ , Pb 2+ , and cd 2+ . Similarly, Wu et al [ 131 ] obtained magnetic composite hydrogels to absorb Mn 2+ , Pb 2+ , and Cu 2+ . Composite hydrogels comprised of CMC and alginate incorporating Fe 3 O 4 nanoparticles showed a great absorption capacity for Mn 2+ , Pb 2+ , and Cu 2+ by 71.83, 89.49, and 105.93 mg.g −1 .…”

Section: Cmc Applications In Agriculturementioning

confidence: 99%

Micro-/Nano-Carboxymethyl Cellulose as a Promising Biopolymer with Prospects in the Agriculture Sector: A Review

et al. 2023

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The increase in the population rate has increased the demand for safe and quality food products. However, the current agricultural system faces many challenges in producing vegetables and fruits. Indiscriminate use of pesticides and fertilizers, deficiency of water resources, short shelf life of products postharvest, and nontargeted delivery of agrochemicals are the main challenges. In this regard, carboxymethyl cellulose (CMC) is one of the most promising materials in the agriculture sector for minimizing these challenges due to its mechanical strength, viscosity, wide availability, and edibility properties. CMC also has high water absorbency; therefore, it can be used for water deficiency (as superabsorbent hydrogels). Due to the many hydroxyl groups on its surface, this substance has high efficacy in removing pollutants, such as pesticides and heavy metals. Enriching CMC coatings with additional substances, such as antimicrobial, antibrowning, antioxidant, and antisoftening materials, can provide further novel formulations with unique advantages. In addition, the encapsulation of bioactive materials or pesticides provides a targeted delivery system. This review presents a comprehensive overview of the use of CMC in agriculture and its applications for preserving fruit and vegetable quality, remediating agricultural pollution, preserving water sources, and encapsulating bioactive molecules for targeted delivery.

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“…Heavy metals could enter and accumulate in the human body through the food and ecological chain and cause bioaccumulation, which leads to chronic health disorders such as cancer, kidney failure, liver damage, brain damage, and bone softening [6]. In recent times, the removal of toxic heavy metal ions from water supplies and wastewater has been a core interest for many researchers and scientists throughout the world [7]. Dil et al [8] have reported 98.84% of Azure B dye adsorption removal from aqueous solution by utilizing novel hybrid nanocomposite catalysts based on carbon nanotube, zinc oxide, zinc, and nickel-phosphorus metalloid.…”

Section: Introductionmentioning

confidence: 99%

“…e adsorbents should be cheap, environmentally friendly, and efficient. Several adsorbents such as activated carbon, zeolite, chitosan, hydrogel, and clays have been studied to remediate toxic heavy metals from soil and wastewater [7,19].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Fe3O4-Bentonite Nanocomposite Adsorbent for Cr(VI) Removal from Water Solution

Adisu

Balakrishnan

Tibebe

2022

International Journal of Chemical Engineering

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Bentonite-magnetite nanocomposite adsorbent (BMNC) was made and investigated for its adsorption removal of Cr(VI) from an aqueous solution. This adsorbent was prepared by the coprecipitation method from sodium bentonite (BNa) with iron chloride solution at controlled pH and under an inert atmosphere. These adsorbents were characterized by atomic absorption spectrophotometer (AAS), Brunauer–Emmett–Teller (BET), dynamic light scattering (DLS), scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) analyses. Particle size of BMNC was in the range of 15 to 95 nm as per DLS. The intercalation of magnetite nanoparticles onto the bentonite clay increased its specific surface area from 142 to 177 m2/g as per BET analysis. Experimental design optimization results in 96.5% of Cr(VI) removal from the water solution at optimized adsorption parameters viz., adsorption time of 101 min, pH of 1.95, adsorbent dose of 1.12 g/L, and initial Cr(VI) concentration of 36.2 mg/L. The results of these studies demonstrate that the BMNC performs well. Moreover, the adsorption of Cr(VI) onto the BMNC was found to be the best fit with Langmuir isotherm (R2 = 0.9984) and a maximum adsorption capacity of 98 mg/g. The kinetics of the adsorption process was found to be a pseudo-second-order model (R2 = 0.9912). The BMNC also showed favourable reusability for adsorbate Cr(VI) ions removal from the water solution.

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Facile preparation of magnetic sodium alginate/carboxymethyl cellulose composite hydrogel for removal of heavy metal ions from aqueous solution

Cited by 68 publications

References 39 publications

Carboxymethyl Cellulose-Based Composite Polymer Hydrogels Cross-Linked with Epichlorohydrin and Application for Cu(II) Removal

Carboxymethyl Cellulose-Based Composite Polymer Hydrogels Cross-Linked with Epichlorohydrin and Application for Cu(II) Removal

Micro-/Nano-Carboxymethyl Cellulose as a Promising Biopolymer with Prospects in the Agriculture Sector: A Review

Synthesis and Characterization of Fe3O4-Bentonite Nanocomposite Adsorbent for Cr(VI) Removal from Water Solution

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