Confined growth of MOF in chitosan matrix for removal of trace Pb(Ⅱ) from reclaimed water

Ma, Yu; You, Dongyu; Fang, Yu; Luo, Jian; Pan, Qinhe; Liu, Yunling; Wang, Fei; Yang, Weiting

doi:10.1016/j.seppur.2022.121223

Cited by 27 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As shown in Figure 8 D1,D2, the relative contents of −OH species heavily decreased to 50.00% from 71.74% (before adsorption), while those of H 2 O and O 2− species showed an increasing trend (up to 25.00% from 17.39% and 10.87%, respectively). This result suggested that there were abundant OH− (LDHs structural constituents) or surface hydroxyls consumed during the Pb(II) adsorption process, and confirmed that the surface hydroxyls also served as adsorption sites for Pb(II) cleanup, besides the precipitation of CO 3 2− [ 31 , 32 , 33 ].…”

Section: Resultsmentioning

confidence: 89%

Layered Double Hydroxides Derived from MIL-88A(Fe) as an Efficient Adsorbent for Enhanced Removal of Lead (II) from Water

Huo

2022

IJMS

View full text Add to dashboard Cite

The efficient removal of lead (II) from aqueous solution remains a big problem and the development of novel nanomaterials as adsorbents by various technologies to solve this problem is promising. This study contributed a novel nanostructure of MIL-88A-layered double hydroxides (LDHs) as the adsorbent for Pb2+, which was synthesized by a two-step solvothermal method with MIL-88A(Fe) as the precursor. The as-prepared material featured a chestnut-like core-shell structure, and exhibited excellent removal performance towards Pb2+ from water in comparison to MIL-88A(Fe) and LDHs (directly synthesized). The adsorption of Pb2+ by the MIL-88A-LDHs conformed to the pseudo-second-order kinetic model and the Langmuir and Freundlich isotherm models. The maximal adsorption capacity was 526.32, 625.00, and 909.09 mg g−1 at 278, 298, and 318 K, respectively. The thermodynamic parameters suggested that the adsorption was an endothermic, entropy-increasing, and spontaneous reaction. X-ray photoelectron spectroscopy (XPS) analysis indicated that the surface complexation was mostly responsible for Pb2+ elimination. The MIL-88A-LDHs can be readily regenerated and showed good cyclic performance towards Pb2+. Thus, the as-prepared MIL-88A-LDHs may hold promise for the elimination of aqueous heavy metals.

show abstract

Section: Resultsmentioning

confidence: 89%

Layered Double Hydroxides Derived from MIL-88A(Fe) as an Efficient Adsorbent for Enhanced Removal of Lead (II) from Water

Huo

2022

IJMS

View full text Add to dashboard Cite

show abstract

“…In 2022, Ma and co-workers used chitosan as the TIF-A1 growth template and prepared TIF-A1/chitosan composite beads using a secondary growth method for Pb(II) adsorption in water [ 72 ]. Several small TIF-A1 crystals formed rod-shaped clusters and aggregated in the pores of chitosan ( Figure 11 a).…”

Section: Applicationmentioning

confidence: 99%

“…Furthermore, in the mixed solution of multiple metal ions, TIF-A1/chitosan hardly adsorbed other ions, and the adsorption removal efficiency of Pb(II) was 99.17%. Especially when the concentration of Pb(II) was 100 ppb, the removal efficiency of trace Pb(II) was 99.95%, and the residual amount of Pb(II) met the international drinking water standards ( Figure 11 c) [ 72 ]. After five adsorption/desorption cycles, TIF-A1/chitosan could still maintain high adsorption performance, and the removal efficiency was more than 99% ( Figure 11 d).…”

Section: Applicationmentioning

confidence: 99%

Tetrahedral Imidazolate Frameworks with Auxiliary Ligands (TIF-Ax): Synthetic Strategies and Applications

Wang

et al. 2023

Molecules

Self Cite

View full text Add to dashboard Cite

Zeolitic imidazolate frameworks (ZIFs) are an important subclass of metal–organic frameworks (MOFs). Recently, we reported a new kind of MOF, namely tetrahedral imidazolate frameworks with auxiliary ligands (TIF-Ax), by adding linear ligands (Hint) into the zinc–imidazolate system. Introducing linear ligands into the M2+-imidazolate system overcomes the limitation of imidazole derivatives. Thanks to the synergistic effect of two different types of ligands, a series of new TIF-Ax with interesting topologies and a special pore environment has been reported, and they have attracted extensive attention in gas adsorption, separation, catalysis, heavy metal ion capture, and so on. In this review, we give a comprehensive overview of TIF-Ax, including their synthesis methods, structural diversity, and multi-field applications. Finally, we also discuss the challenges and perspectives of the rational design and syntheses of new TIF-Ax from the aspects of their composition, solvent, and template. This review provides deep insight into TIF-Ax and a reference for scholars with backgrounds of porous materials, gas separation, and catalysis.

show abstract

“…Therefore, amounts of Pb(II)‐containing wastewater were inevitably generated and caused harmful effects to all species through accumulation and transmission in the food chain 4,5 . Conventional Pb(II) pollution remediation technologies include electrochemical precipitation, ultrafiltration, reverse osmosis, ion exchange, solvent extraction, and adsorption, and so forth 6–9 . There are growing efforts that have been addressed to develop eco‐friendly technologies or chemicals for effective Pb(II) pollution management 9,10 .…”

Section: Introductionmentioning

confidence: 99%

“…Conventional Pb(II) pollution remediation technologies include electrochemical precipitation, ultrafiltration, reverse osmosis, ion exchange, solvent extraction, and adsorption, and so forth 6–9 . There are growing efforts that have been addressed to develop eco‐friendly technologies or chemicals for effective Pb(II) pollution management 9,10 . In this framework, biosorption, which has significant advantages such as simple operation, recyclability, cost‐efficiency, excellent removal capacity, and low risk of secondary pollution, has received considerable attention 1,11 …”

Section: Introductionmentioning

confidence: 99%

Efficient removal of aqueous Pb(II) ions by magnetic alginate composite microcapsules containing canola straw‐derived biochar as the reinforcing fillers

Luo,

Che,

Huang

et al. 2023

Journal of Polymer Science

View full text Add to dashboard Cite

With the rapid development of industry, water pollution caused by lead has caused great harm to human health. In this study, alginate is used as a base and blended with biochar to form calcium alginate hydrogel beads with high mechanical properties through ionic cross‐linking. Besides, the material (BC/MCAC) is prepared by the material (C‐γ‐Fe2O3) as a magnetizing agent and to remove lead. Then, a series of batch experiments and material characterizations are performed to evaluate the adsorption process of the material. The results show that the maximum adsorption capacity of BC/MCAC to Pb(II) is 211.6 mg g−1 at pH = 7. The adsorption process is well described by the Langmuir adsorption isotherm and pseudo‐second‐order kinetic model. This indicates that the lead adsorbed by BC/MCAC is a monolayer chemisorption that occurs on a uniform surface. After three regeneration cycles, BC/MCAC is found to retain 82.37% of the lead adsorption capacity and has good regeneration ability. Lead is removed by BC/MCAC mainly through the complexation of oxygen‐containing functional groups, electrostatic interaction, and ion exchange. BC/MCAC allows for more sustainable use of the wastes and is expected to be a new type of lead adsorbent for industrial wastewater.

show abstract

Confined growth of MOF in chitosan matrix for removal of trace Pb(Ⅱ) from reclaimed water

Cited by 27 publications

References 32 publications

Layered Double Hydroxides Derived from MIL-88A(Fe) as an Efficient Adsorbent for Enhanced Removal of Lead (II) from Water

Layered Double Hydroxides Derived from MIL-88A(Fe) as an Efficient Adsorbent for Enhanced Removal of Lead (II) from Water

Tetrahedral Imidazolate Frameworks with Auxiliary Ligands (TIF-Ax): Synthetic Strategies and Applications

Efficient removal of aqueous Pb(II) ions by magnetic alginate composite microcapsules containing canola straw‐derived biochar as the reinforcing fillers

Contact Info

Product

Resources

About