Synthesis of hyperbranched polyamine dendrimer/chitosan/silica composite for efficient adsorption of Hg(II)

Wang, Bingxiang; Wu, Kaiyan; Liu, Tonghe; Luan, Hui; Xue, Kaiyue; Liu, Yongfeng; Niu, Yuzhong

doi:10.1016/j.ijbiomac.2023.123135

Cited by 27 publications

(3 citation statements)

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“…The fast initial adsorption is attributed to the presence of sufficient adsorption sites and Cd(II), which enable the binding of Cd(II) by the biosorbents quickly. 8 As the adsorption proceeded, both adsorption sites and Cd(II) are decreased, which reduces the interaction chances between them. 50 Hence, the adsorption slows down gradually to achieve equilibrium.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The adsorption capacities of AP-1.0-AMP and AP-2.0-AMP can reach 0.31 and 0.33 mmol·g –1 at 50 min, accounting for 91.18 and 91.67% of the total adsorbed amount. The fast initial adsorption is attributed to the presence of sufficient adsorption sites and Cd(II), which enable the binding of Cd(II) by the biosorbents quickly . As the adsorption proceeded, both adsorption sites and Cd(II) are decreased, which reduces the interaction chances between them .…”

Section: Resultsmentioning

confidence: 99%

“…Many methods, including chemical precipitation, adsorption, membrane separation, and reverse osmosis, were employed for decontaminating aqueous Cd(II). , Adsorption is recognized as an efficient method owing to the merits of simple operation, high efficiency, and easy regeneration of the adsorbents . Various adsorbents were fabricated to adsorb Cd(II) from water solutions, such as silica, carbon nanotubes, chitosan, graphene, biochar, montmorillonite, and cellulose nanofiber membranes . Biomass-based adsorbents have attracted vast attention due to their wide range of sources, environmental friendliness, and biodegradability .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Aminomethylpyridine-Decorated Polyamidoamine Dendrimer/Apple Residue for the Efficient Capture of Cd(II)

Cong,

Wu,

Wang

et al. 2024

Langmuir

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Water contamination irritated by Cd(II) brings about severe damage to the ecosystem and to human health. The decontamination of Cd(II) by the adsorption method is a promising technology. Here, we construct aminomethylpyridinefunctionalized polyamidoamine (PAMAM) dendrimer/apple residue biosorbents (AP-G1.0-AMP and AP-G2.0-AMP) for adsorbing Cd(II) from aqueous solution. The adsorption behaviors of the biosorbents for Cd(II) were comprehensively evaluated. The maximum adsorption capacities of AP-G1.0-AMP and AP-G2.0-AMP for Cd(II) are 1.40 and 1.44 mmol•g −1 at pH 6. The adsorption process for Cd(II) is swift and can reach equilibrium after 120 min. The film diffusion process dominates the adsorption kinetics, and a pseudo-second-order model is appropriate to depict this process. The uptake of Cd(II) can be promoted by increasing concentration and temperature. The adsorption isotherm follows the Langmuir model with a chemisorption mechanism. The biosorbents also display satisfied adsorption for Cd(II) in real aqueous media. The adsorption mechanism indicates that C−N, N�C, C−O, CONH, N−H, and O−H groups participate in the adsorption for Cd(II). The biosorbents display a good regeneration property and can be reused with practical value. The as-prepared biosorbents show great potential for removing Cd(II) from water solutions with remarkable significance.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%