Enhanced selective removal of lead ions using a functionalized PAMAM@UiO-66-NH2 nanocomposite: Experiment and mechanism

Ji, Zhicheng; Sun, Heyu; Zhu, Yuanfeng; Zhang, Dongdong; Wang, Lianhuan; Dai, Fengying; Zhao, Yiping; Chen, Li

doi:10.1016/j.micromeso.2021.111433

Cited by 26 publications

(6 citation statements)

References 59 publications

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“…The peaks of the N 1s spectra at 399.3 eV and 401.2 eV were caused by the -NH 2 -, -NH-, and C-N bonds of the LMM. Then, the peaks of -NH 2 -, -NH-, and C-N changed to 399.28 eV and 399.7 eV and the new peaks appeared at 406.6 eV (Pb-N); these results demonstrate that the nitrogenous functional groups participated in the adsorption process of the LMM for Pb 2+ [ 2 , 15 , 18 ]. In addition, the S 2p XPS spectra could be fitted into two peaks at 163.1 eV and 164.2 eV, which were C-S and C=S bonds.…”

Section: Resultsmentioning

confidence: 88%

“…14, x 13 of 16and 399.7 eV and the new peaks appeared at 406.6 eV (Pb-N); these results demonstrate that the nitrogenous functional groups participated in the adsorption process of the LMM for Pb 2+[2,15,18]. In addition, the S 2p XPS spectra could be fitted into two peaks at 163.1 eV and 164.2 eV, which were C-S and C=S bonds.…”

mentioning

confidence: 67%

“…The World Health Organization (WHO) stipulates that the level of lead ions in drinking water should be less than 0.01 mg/L. Moreover, when the daily intake of lead exceeds 0.3 mg, it is considered harmful to human health [ 2 , 3 ]. When the contents of lead ions in the body exceed a certain amount, it makes the human body have kidney failure, high blood pressure, and psychiatric disorders; at the same time, when excess lead ions accumulate in bones, brain, and muscles, they can cause serious developmental disorders, injury, disease, and even death [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

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Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb2+ Capture

Zhang

Chen

2022

Polymers

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With the continuous research on lignin-based sorbents, there are still limitations in the research of spherical sorbents with a high adsorption capacity for Pb2+. In order to solve the problem of low adsorption effect, alkali lignin (AL) was modified and assembled to increase the adsorption active sites. In this work, we used dual-modified lignin (DML) as a raw material to assemble a singular lignin-based multilayer microsphere (LMM) with sodium alginate (SA) and dopamine. The prepared adsorbent had various active functional groups and spherical structures; the specific surface area was 2.14 m2/g and the average pore size was 8.32 nm. The adsorption process followed the Freundlich isotherm and the second-order kinetic model. Therefore, the LMM adsorbed Pb2+ ascribed by the electrostatic attraction and surface complexation; the adsorption capacity was 250 mg/g. The LMM showed a selective adsorption performance for Pb2+ and the adsorption capacity followed the order Pb2+ (187.4 mg/g) > Cu2+(168.0 mg/g) > Mn2+(166.5 mg/g). After three cycles, the removal efficiency of Pb2+ by the LMM was 69.34%, indicating the reproducibility of LMM.

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Section: Resultsmentioning

confidence: 88%

mentioning

confidence: 67%

Section: Introductionmentioning

confidence: 99%

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Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb2+ Capture

Zhang

Chen

2022

Polymers

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“…Recently, Ji et al, proposed PAMAM@UiO-66-NH 2 nanocomposites for the selective removal of Pb 2+ [ 103 ]. In their work, XPS was used to investigate the adsorption mechanism for Pb 2+ .…”

Section: Adsorption Mechanismsmentioning

confidence: 99%

The Adsorption of Heavy Metal Ions by Poly (Amidoamine) Dendrimer-Functionalized Nanomaterials: A Review

2022

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Rapid industrialization has resulted in serious heavy metal pollution. The removal of heavy metal ions from solutions is very important for environmental safety and human health. Poly (amidoamine) (PAMAM) dendrimers are artificial macromolecular materials with unique physical and chemical properties. Abundant amide bonds and amino functional groups provide them with a high affinity for heavy metal ions. Herein, PAMAM-functionalized adsorbents are reviewed in terms of different nanomaterial substrates. Approaches in which PAMAM is grafted onto the surfaces of substrates are described in detail. The adsorption isotherms and kinetics of these adsorbents are also discussed. The effects of PAMAM generation, pH, adsorbent dosage, adsorption time, thermodynamics, and ionic strength on adsorption performance are summarized. Adsorption mechanisms and the further functionalization of PAMAM-grafted adsorbents are reviewed. In addition to the positive results, existing problems are also put forward in order to provide a reference for the optimization of PAMAM-grafted adsorbents of heavy metal ions.

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“…Due to their special structure and properties, PAMAM dendrimers have been applied in various fields [ 23 , 24 , 25 ]. It is worth mentioning that the whole generation of PAMAM dendrimers are good candidates for post-functionalization of LMOFs [ 26 ]. With a large number of terminal amino groups and flexible aliphatic bonds, PAMAM-functionalized LMOFs are expected to have higher fluorescence intensity [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Polyamidoamine Dendrimers Functionalized Water-Stable Metal–Organic Frameworks for Sensitive Fluorescent Detection of Heavy Metal Ions in Aqueous Solution

Guo,

Muhammad,

et al. 2023

Polymers

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In this work, polyamidoamine (PAMAM)-functionalized water-stable Al-based metal–organic frameworks (MIL-53(Al)-NH2) were proposed with enhanced fluorescence intensity, and used for the sensitive detection of heavy metal ions in aqueous solution. The size and morphology of MIL-53(Al)-NH2 were effectively optimized by regulating the component of the reaction solvents. PAMAM dendrimers were subsequently grafted onto the surface with glutaraldehyde as a cross-linking agent. It was found that the size and morphology of MIL-53(Al)-NH2 have great influence on their fluorescence properties, and PAMAM grafting could distinctly further improve their fluorescence intensity. With higher fluorescence intensity, the PAMAM-grafted MIL-53(Al)-NH2 showed good linearity (R2 = 0.9925–0.9990) and satisfactory sensitivity (LOD = 1.1–8.6 μmol) in heavy metal ions determination. Fluorescence enhancement and heavy metal ions detection mechanisms were discussed following the experimental results. Furthermore, analogous water-stable Materials of Institute Lavoisier (MIL) metal–organic frameworks such as MIL-53(Fe)-NH2 were also proved to have similar fluorescence enhancement performance after PAMAM modification, which demonstrates the universality of the method and the great application prospects in the design of PAMAM-functionalized high-sensitivity fluorescence sensors.

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Enhanced selective removal of lead ions using a functionalized PAMAM@UiO-66-NH2 nanocomposite: Experiment and mechanism

Cited by 26 publications

References 59 publications

Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb2+ Capture

Dual-Modified Lignin-Assembled Multilayer Microsphere with Excellent Pb2+ Capture

The Adsorption of Heavy Metal Ions by Poly (Amidoamine) Dendrimer-Functionalized Nanomaterials: A Review

Polyamidoamine Dendrimers Functionalized Water-Stable Metal–Organic Frameworks for Sensitive Fluorescent Detection of Heavy Metal Ions in Aqueous Solution

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