Poly(Amidoamine) Dendrimer Modified Superparamagnetic Nanoparticles as an Efficient Adsorbent for Cr(VI) Removal: Effect of High-Generation Dendrimer on Adsorption Performance

2022 ◽  
Author(s):  
Can Cui ◽  
Ya-Dian Xie ◽  
Jiao-Jiao Niu ◽  
Hai-Liang Hu ◽  
Sen Lin
Keyword(s):  
Superparamagnetic Nanoparticles ◽  
Adsorption Performance ◽  
Efficient Adsorbent

scholarly journals Poly(amidoamine) dendrimer modified superparamagnetic nanoparticles as an efficient adsorbent for Cr(VI) removal: Effect of high-generation dendrimer on adsorption performance

2021 ◽  
Author(s):  
Can Cui ◽  
Yadian Xie ◽  
Jiaojiao Niu ◽  
Hailiang Hu ◽  
Sen Lin
Keyword(s):  
Adsorption Capacity ◽  
Pamam Dendrimer ◽  
Superparamagnetic Nanoparticles ◽  
Batch Adsorption ◽  
Adsorption Model ◽  
Langmuir Adsorption ◽  
Pseudo Second Order ◽  
Modified Adsorbents ◽  
Adsorption Desorption ◽  
Efficient Adsorbent

Abstract Heavy metal ions pollution is one of the most dangerous and critical threats to human health and environment. In this work, three different generations of PAMAM dendrimer decorated on magnetic Fe 3 O 4 composites (Fe 3 O 4 @SiO 2 –G1, Fe 3 O 4 @SiO 2 –G3, Fe 3 O 4 @SiO 2 –G5) were fabricated and characterized by FTIR, XRD, TEM, and TGA. The obtained composites were used for Cr(VI) removal. Batch adsorption studies showed that the adsorption reached equilibrium within 60 min, and the optimal pH was 3.0. The result of adsorption kinetics was simulated by the pseudo–second-order model. The adsorption equilibrium isotherm was well fitted with the Langmuir adsorption model. Furthermore, thermodynamics calculations revealed that the adsorption process was endothermic and spontaneous. Importantly, adsorption capacity of Cr(VI) obey the sequence of Fe 3 O 4 @SiO 2 –G1＜Fe 3 O 4 @SiO 2 –G5＜Fe 3 O 4 @SiO 2 –G3, 3 generation of PAMAM (3G) is the optimal for adsorption capacity of Cr(VI). The maximum theoretical Cr(VI) adsorption capacity ( q m ) of Fe 3 O 4 @SiO 2 –G3 was 334.45 mg/g, and removal ration remained above 89.5% after five cycles of adsorption–desorption. Thus, Fe 3 O 4 @SiO 2 –G3 is predicted to be an efficient adsorbent for the adsorption of Cr(VI) from aqueous solution, and the obtained results can help in the generation optimization during fabrication of dendrimer modified adsorbents.

Trititanate Nanotubes as highly efficient adsorbent for fluoride removal from water: Adsorption performance and uptake mechanism

2016 ◽  
Vol 4 (4) ◽  
pp. 4754-4768 ◽  
Author(s):  
Prathibha Chinnakoti ◽  
Ranganayakulu K. Vankayala ◽  
Avinash L.A. Chunduri ◽  
Lakshmana Reddy Nagappagari ◽  
Shankar V. Muthukonda ◽  
...  
Keyword(s):  
Water Adsorption ◽  
Fluoride Removal ◽  
Uptake Mechanism ◽  
Adsorption Performance ◽  
Highly Efficient ◽  
Efficient Adsorbent

Removal of Hg2+ by carboxyl-terminated hyperbranched poly(amidoamine) dendrimers grafted superparamagnetic nanoparticles as an efficient adsorbent

2020 ◽  
Vol 27 (9) ◽  
pp. 9547-9567 ◽  
Author(s):  
Azam Alsadat Tabatabaiee Bafrooee ◽  
Homayon Ahmad Panahi ◽  
Elham Moniri ◽  
Mahsasadat Miralinaghi ◽  
Amir Hesam Hasani
Keyword(s):  
Superparamagnetic Nanoparticles ◽  
Hyperbranched Poly ◽  
Efficient Adsorbent

Preparation of a novel hafnium-loaded Fe3O4@SiO2 superparamagnetic nanoparticles and its adsorption performance for phosphate in water

2021 ◽  
Vol 216 ◽  
pp. 188-198
Author(s):  
Gege Zhao ◽  
Qian Zhao ◽  
Xinwei Jin ◽  
Hongbo Wang ◽  
Kefeng Zhang ◽  
...  
Keyword(s):  
Superparamagnetic Nanoparticles ◽  
Adsorption Performance

scholarly journals Synthesis of sulfamic acid supported on Cr-MIL-101 as a heterogeneous acid catalyst and efficient adsorbent for methyl orange dye

RSC Advances ◽  
2018 ◽  
Vol 8 (37) ◽  
pp. 20517-20533 ◽  
Author(s):  
Sohier A. El-Hakam ◽  
Salem E. Samra ◽  
Shady M. El-Dafrawy ◽  
Amr A. Ibrahim ◽  
Reda S. Salama ◽  
...  
Keyword(s):  
Methyl Orange ◽  
Heterogeneous Catalysts ◽  
Sulfamic Acid ◽  
Acid Catalyst ◽  
Adsorption Performance ◽  
Heterogeneous Acid Catalyst ◽  
Methyl Orange Dye ◽  
Efficient Adsorbent

Sulfamic acid was incorporated into MIL-101 (Cr). The samples exhibited excellent adsorption performance for MO dye and acted as heterogeneous catalysts for coumarin and xanthene synthesis.

Preparation and Application of Supramolecular Assembled β-cyclodextrin/polyacrylonitrile Composite Nanofibers as a Highly Efficient Adsorbent for Dye Removal

2012 ◽  
Vol 622-623 ◽  
pp. 827-832 ◽  
Author(s):  
Arvind H. Jadhav ◽  
Hern Kim
Keyword(s):  
Adsorption Capacity ◽  
Composite Nanofibers ◽  
Dye Removal ◽  
Methyl Violet ◽  
Homogeneous Solution ◽  
Ftir Analysis ◽  
Experimental Conditions ◽  
Electrospinning Technique ◽  
Adsorption Performance ◽  
Efficient Adsorbent

β-cyclodextrin (β-CD) incorporated polyacrylonitrile (PAN) composite nanofibers were successfully prepared by using electrospinning technique and used as a novel adsorbent for the elimination of dyes from aqueous solution. The formations of bead-free and uniform nanofibers were obtained using various compositions of homogeneous solution of β-CD and PAN in N,N-dimethylformamide (DMF). The morphology and structure of nanofibers were determined and characterized by SEM, XRD, TGA, and FTIR analysis. The adsorption performance of prepared nanofibers was examined by using methylene blue (MB) and methyl violet (MV) as adsorbate. Results showed that β-CD/PAN nanofibers were achieved equilibrium point within 2h with 96.21 % and 94.37 % adsorption of MV and MB, respectively at ambient condition. In addition, adsorption capacity of nanofibers was studied under different experimental conditions and their effects on adsorption capacity such as temperature, pH, and contact time. The regeneration of β-CD/PAN nanofibers were carried out using methanol and re used five times as an adsorbent, Results indicates that regenerated adsorbent was adsorb 89.0% and 85.22 % of MV and MB, respectively in 5th cycle.

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