Study on Heavy Metal Ion Adsorption of PAN-Amidoxime Nanofiber Nonwoven Material

2014 ◽  
Vol 1033-1034 ◽  
pp. 1072-1076 ◽  
Author(s):  
Zong Jie Li ◽  
Yu Hao Ma ◽  
Min Hu ◽  
Wei Min Kang ◽  
Bo Wen Cheng
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Copper Ions ◽  
Nonwoven Material ◽  
Ion Adsorption ◽  
Metal Ion Adsorption ◽  
Adsorption Capacities ◽  
Adsorption Data ◽  
Ft Ir ◽  
Scanning Electron

In this study, polyacrylonitrile-amidoxime nanofibers were prepared by combining the technique of electrospinning and chemical modification with hydroxylamine chloride. Before modified the Polyacrylonitrile (PAN) nanofibers were bonded with two layers Ethylene-Propylene Side By Side (ES) thermal bonded nonwovens to improve its mechanical strength. Subsequently, they were applied to adsorb copper ions. The results of FT-IR spectra and scanning electron microscope indicated that nitrile groups in PAN were partly converted into amidoxime groups and there were no serious cracks on the surface of PAN-amidoxime nanofibers. The adsorption data of Cu (II) ions was fitted roughly with the Langmuir isotherm. The maximal adsorption capacities of Cu (II) ions reached 176 mg/g.

scholarly journals Synthesis, Characterization and Heavy Metal Ion Adsorption Behavior of Imidazole-Based Novel Polyamides and Polyimides

2017 ◽  
Vol 61 (3) ◽  
Author(s):  
Bita Soleimani ◽  
Mehdi Taghavi ◽  
Mousa Ghaemy
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Ion Adsorption ◽  
H Nmr ◽  
Good Solubility ◽  
Metal Ion Adsorption ◽  
Nmr Techniques ◽  
Ft Ir ◽  
Aromatic Heterocyclic ◽  
C Nmr

Imidazole-based polyamides (PA)s and polyimides (PI) s were prepared from condensation of a new aromatic heterocyclic diamine, 4,4›(4,4›-(2-(4-(triflouromethyl)phenyl)-1H-imidazole-4,5-dyl)bis(4,1-phenylen))bis(oxy)bis(3-(4,5-diphenyl-1H-imidazole-2-yl)aniline), with various diacids and dianhydrides, respectively. The structure of diamine, PAs and PIs were fully characterized by using elemental analysis, FT-IR, <sup>1</sup>H NMR and <sup>13</sup>C NMR techniques. Also, adsorption capability of these polymers for removal of heavy metal ions such as Co<sup>2+</sup>, Cr<sup>3+</sup>, Cd<sup>2+</sup>, Hg<sup>2+</sup> and Pb<sup>2+</sup> from aqueous solutions was also tested at pH 7-8. The PAs and PIs showed good solubility in aprotic polar organic solvents with high thermal stability exhibiting the glass transition temperatures (T<sub>g</sub>)s and 10% weight loss temperatures (T<sub>10</sub>%) in the range of 220-286 °C and 383-435 °C for PAs and 251-307 °C and 407-512 °C for PIs.

scholarly journals Preparation, characterization and application of CS@PDA@Fe3O4 nanocomposite as a new magnetic nano-adsorber for the removal of metals and dyes in wastewater

RSC Advances ◽  
2021 ◽  
Vol 11 (38) ◽  
pp. 23679-23685
Author(s):  
Xingjing Zhang ◽  
Baohe Li ◽  
Xiaoqian Han ◽  
Nong Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Ion Adsorption ◽  
Metal Ion Adsorption

Synthesis of CS@PDA@Fe3O4 nanocomposite and heavy metal ion adsorption.

Functional group effect of isoreticular metal–organic frameworks on heavy metal ion adsorption

2018 ◽  
Vol 42 (11) ◽  
pp. 8864-8873 ◽  
Author(s):  
Leili Esrafili ◽  
Vahid Safarifard ◽  
Elham Tahmasebi ◽  
M. D. Esrafili ◽  
Ali Morsali
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Functional Group ◽  
Metal Organic Frameworks ◽  
Ion Adsorption ◽  
Group Effect ◽  
Metal Ion Adsorption ◽  
Metal Organic

We examined adsorption behavior of some MOFs having different functional groups in their pillar structures for adsorption of some heavy metal ions.

scholarly journals Ecofriendly Approach for Treatment of Heavy-Metal-Contaminated Water Using Activated Carbon of Kernel Shell of Oil Palm

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2627
Author(s):  
Rabia Baby ◽  
Mohd Zobir Hussein
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Oil Palm ◽  
Metal Ion ◽  
Agricultural Waste ◽  
Palm Kernel ◽  
Significant Risk ◽  
Contaminated Water ◽  
Ion Adsorption ◽  
Metal Ion Adsorption

Heavy metal ion contamination in water poses a significant risk to human health as well as to the environment. Millions of tons of agricultural wastes are produced from oil palm plantations which are challenging to manage. In this study, we converted palm kernel shells (PKS) from a palm oil plantation into activated carbon (AC) having a surface area of 1099 m2/g using phosphoric acid as an activator. The prepared material was characterized using BET, XRD, Raman, FESEM and FTIR analyses. The AC was applied for the treatment of heavy-metal-contaminated water, and different parameters; the pH, adsorbent dosage, contact time and metal ion concentrations were varied to determine the optimal conditions for the metal ion adsorption. Different kinetic models; the zeroth, first-order and second-order, and Freundlich and Langmuir isotherm models were used to determine the mechanism of metal ion adsorption by the AC. Under the optimized conditions, Cr6+ and Pb2+ were removed completely, while Zn2+ and Cd2+ were more than 80% removed. This is a greener approach in which an agricultural waste, PKS is converted into a useful product, activated carbon and subsequently applied for the treatment of heavy metal-contaminated water.

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