Removal of Zn(II) and Ni(II) heavy metal ions by new alginic acid-ester derivatives materials

Boughrara, Lemya; Sebba, Fatima Zohra; Sebti, Houari; Choukchou-Braham, Esma; Bounaceur, Boumediene; Kada, Seghier Ould; Zaoui, Farouk

doi:10.1016/j.carbpol.2021.118439

Cited by 29 publications

(12 citation statements)

References 89 publications

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“…The heat flow curve also indicates that this stage is dehydration. When the temperature is higher than 150 °C, the heat flow curve shows the melted state with decomposition, and the weight loss in this part is 35%, which should be the result of the fracture of 1,4-glycosidic bond [ 39 ]. In the subsequent process, the thermal weight loss rate of the material gradually flattens, which may be the result of the gradual decomposition and melting of the organic components in the material, and the final mass residual is 32%.…”

Section: Resultsmentioning

confidence: 99%

Effective Removal of Tetracycline from Water Using Copper Alginate @ Graphene Oxide with In-Situ Grown MOF-525 Composite: Synthesis, Characterization and Adsorption Mechanisms

Chen

et al. 2022

Nanomaterials

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For nanomaterials, such as GO and MOF-525, aggregation is the main reason limiting their adsorption performance. In this research, Alg-Cu@GO@MOF-525 was successfully synthesized by in-situ growth of MOF-525 on Alg-Cu@GO. By dispersing graphene oxide (GO) with copper alginate (Alg-Cu) with three-dimensional structure, MOF-525 was in-situ grown to reduce aggregation. The measured specific surface area of Alg-Cu@GO@MOF-525 was as high as 807.30 m2·g−1, which is very favorable for adsorption. The synthesized material has affinity for a variety of pollutants, and its adsorption performance is significantly enhanced. In particular, tetracycline (TC) was selected as the target pollutant to study the adsorption behavior. The strong acid environment inhibited the adsorption, and the removal percentage reached 96.6% when pH was neutral. Temperature promoted the adsorption process, and 318 K adsorption performance was the best under experimental conditions. Meanwhile, 54.6% of TC could be removed in 38 min, and the maximum adsorption capacity reached 533 mg·g−1, far higher than that of conventional adsorption materials. Kinetics and isotherms analysis show that the adsorption process accords with Sips model and pseudo-second-order model. Thermodynamic study further shows that the chemisorption is spontaneous and exothermic. In addition, pore-filling, complexation, π-π stack, hydrogen bond and chemisorption are considered to be the causes of adsorption.

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Section: Resultsmentioning

confidence: 99%

Effective Removal of Tetracycline from Water Using Copper Alginate @ Graphene Oxide with In-Situ Grown MOF-525 Composite: Synthesis, Characterization and Adsorption Mechanisms

Chen

et al. 2022

Nanomaterials

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“…Furthermore, in the range of 440–700 K, the mass decreased by 34 % and 54 %, respectively. This was mainly due to the oxidative decomposition of organic matter and the rupture of 1–4 glycosidic bond [39] . The slow loss of mass during subsequent heating may be caused by further degradation and carbonization of the material.…”

Section: Resultsmentioning

confidence: 99%

Efficient Adsorption of Methylene Blue in Aqueous Solution by Acid‐modified Sodium Alginate

Chen

et al. 2022

ChemistrySelect

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The acid-modified sodium alginate (AMSA) was synthesized utilizing a simple acidification method and its synthesis was confirmed by acid-base titration method, SEM, XRD, FTIR, TGA and BET. The sodium alginate after acidification, with a large number of carboxyl groups introduced, was favorable to the adsorption of methylene blue (MB) from water. The maximum adsorption capacity calculated by Langmuir model was up to 1593 mg/g, which was significantly higher than the adsorption capacity of other adsorbents reported. The adsorption rate of MB by AMSA was very fast. After the addition of adsorbent, the adsorption removal rate reached 79 % in 30 min, and the adsorption was balanced in 120 min (94 % of MB was removed). Furthermore, electrostatic interaction and hydrogen bonding, pore-filling and chemisorption were considered as the main adsorption mechanisms. AMSA is expected to be an optimal candidate for efficient and rapid removal of MB due to its simple synthesis, abundant sources, easy separation and no secondary pollution.

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“…At low pH, the competition between the H + ions and the adsorption sites on the LCE-MOT and nano-LCE-MOT surfaces became more intense in line with an increase in the H + concentration, thus leading to a decrease in adsorption capacity [ 47 ]. At low pH, Zn (II) exists in the form of a dissolved metal, whereas at pH values of above approximately, Zn may precipitate out as ZnOH and Zn (OH) 2 , decreasing the percentage of adsorption [ 48 ]. Comparing the adsorption behaviour of LCE-MOT and nano-LCE-MOT toward Zn (II), the adsorption capacity of nano-LCE-MOT toward Zn is much higher than that of LCE-MOT, even at lower pH, where similar behaviour is observed.…”

Section: Resultsmentioning

confidence: 99%

Lignocellulose-Based Superabsorbent Polymer Gel Crosslinked with Magnesium Aluminum Silicate for Highly Removal of Zn (II) from Aqueous Solution

Zhang

Liu

et al. 2021

Polymers

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Lignocellulose (LCE) was ultrasonically treated and intercalated into magnesium aluminum silicate (MOT) clay to prepare a nano-lignocellulose magnesium aluminum silicate polymer gel (nano-LCE-MOT) for the removal of Zn (II) from aqueous solution. The product was characterised using nitrogen adsorption/desorption isotherm measurements, Fourier-transform infrared spectroscopy, scanning electron microscopy and energy-dispersive X-ray spectroscopy. The conditions for the adsorption of Zn (II) on nano-LCE-MOT were screened, and adsorption kinetics and isotherm model analysis were carried out to explore the adsorption mechanism and achieve the optimal adsorption of Zn (II). Optimal adsorption was achieved at an initial Zn (II) concentration of 800 mg/L at 60 °C in 160 min at a pH of 4.52. The adsorption kinetics were explored using a pseudo-second-order model, with the isotherm adsorption equilibrium found to conform to the Langmuir model. The maximum adsorption capacity of the nano-LCE-MOT polymer gel toward Zn (II) is 513.48 mg/g. The materials with adsorbed Zn (II) were desorbed using different media, with HCl found to be the most ideal medium to desorb Zn (II). The optimal desorption of Zn (II) was achieved in 0.08 mol/L HCl solution at 65 °C in 60 min. Under these conditions, Zn (II) was almost completely desorbed from the adsorbents, with the adsorption effect after cycling being slightly different from that of the initial adsorption.

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Removal of Zn(II) and Ni(II) heavy metal ions by new alginic acid-ester derivatives materials

Cited by 29 publications

References 89 publications

Effective Removal of Tetracycline from Water Using Copper Alginate @ Graphene Oxide with In-Situ Grown MOF-525 Composite: Synthesis, Characterization and Adsorption Mechanisms

Effective Removal of Tetracycline from Water Using Copper Alginate @ Graphene Oxide with In-Situ Grown MOF-525 Composite: Synthesis, Characterization and Adsorption Mechanisms

Efficient Adsorption of Methylene Blue in Aqueous Solution by Acid‐modified Sodium Alginate

Lignocellulose-Based Superabsorbent Polymer Gel Crosslinked with Magnesium Aluminum Silicate for Highly Removal of Zn (II) from Aqueous Solution

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