Sol-modified sintering-induced mesoporous polytetrafluoroethylene/poly(acrylic acid-co-hydroxyethyl methacrylate) composite fiber as an adsorbent with high adsorption capacity for dyes

2021 ◽  
pp. 124988
Author(s):  
Naiku Xu ◽  
Mengru Ren ◽  
Hui Cheng
Keyword(s):  
Acrylic Acid ◽  
Adsorption Capacity ◽  
Composite Fiber ◽  
Hydroxyethyl Methacrylate ◽  
High Adsorption ◽  
High Adsorption Capacity ◽  
Poly Acrylic Acid

scholarly journals Preparation of a poly(acrylic acid) based hydrogel with fast adsorption rate and high adsorption capacity for the removal of cationic dyes

RSC Advances ◽  
2019 ◽  
Vol 9 (37) ◽  
pp. 21075-21085 ◽  
Author(s):  
Zhenyu Yuan ◽  
Jie Wang ◽  
Yiming Wang ◽  
Qian Liu ◽  
Yujie Zhong ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Glycidyl Methacrylate ◽  
Adsorption Rate ◽  
Cationic Dyes ◽  
High Adsorption ◽  
High Adsorption Capacity ◽  
Poly Acrylic Acid

A biocompatible Dex-MA/PAA hydrogel was prepared through copolymerization of glycidyl methacrylate substituted dextran (Dex-MA) with acrylic acid (AA), which was applied as the adsorbent to remove cationic dyes from aqueous solutions.

Poly(acrylic acid) functionalized magnetic graphene oxide nanocomposite for removal of methylene blue

RSC Advances ◽  
2015 ◽  
Vol 5 (41) ◽  
pp. 32272-32282 ◽  
Author(s):  
Jiawen Zhang ◽  
Md. Shafiul Azam ◽  
Chen Shi ◽  
Jun Huang ◽  
Bin Yan ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Graphene Oxide ◽  
Water Treatment ◽  
Acrylic Acid ◽  
Adsorption Capacity ◽  
Polyacrylic Acid ◽  
High Adsorption ◽  
Magnetic Graphene Oxide ◽  
Magnetic Graphene ◽  
High Adsorption Capacity

A polyacrylic acid functionalized magnetic Fe3O4nanoparticle-graphene oxide nanocomposite shows high adsorption capacity of dye and excellent recyclability in water treatment.

scholarly journals Iron Species-Supporting Hydrophobic and Nonswellable Polytetrafluoroethylene/Poly(acrylic acid-co-hydroxyethyl methacrylate) Composite Fiber and Its Stable Catalytic Activity for Methylene Blue Oxidative Decolorization

Polymers ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1570
Author(s):  
Naiku Xu ◽  
Mengru Ren
Keyword(s):  
Methylene Blue ◽  
Acrylic Acid ◽  
Fenton Reaction ◽  
Composite Fiber ◽  
Hydroxyethyl Methacrylate ◽  
Iron Species ◽  
Decolorization Efficiency ◽  
Water Swelling ◽  
Crosslinking Agents ◽  
Poly Acrylic Acid

Polytetrafluoroethylene emulsion was ultrasonically mixed with an extremely spinnable poly(acrylic acid-co-hydroxyethyl methacrylate) solution to get a dispersion with good spinnability, and the obtained dispersion was then wet-spun into water-swellable fiber. Crosslinking agents and iron species were simultaneously introduced into the water-swellable fiber through simple impregnation and water swelling. A composite fiber with Fenton reaction-catalyzing function was then fabricated by sequentially conducting crosslinking and sintering treatment. Due to crosslinking-induced good resistance to water swelling and PTFE component-induced hydrophobicity, the composite fiber showed a highly stable activity to catalyze H2O2 to oxidatively decolorize methylene blue (MB). Within nine cycles, the composite fiber could decolorize more than 90% of MB within one minute in the presence of H2O2 and did not show any attenuation in MB decolorization efficiency. The composite fiber still could reduce the total organic carbon of MB aqueous solution from 18.3 to 10.3 mg/L when used for the ninth time. Therefore, it is believable that the prepared fiber has good and broad application prospects in the field of dye wastewater treatment.

Mercury Removal from Wastewater by Steamed Hoof Powder

1999 ◽  
Vol 40 (7) ◽  
pp. 109-116 ◽  
Author(s):  
M. H. Ansari ◽  
A. M. Deshkar ◽  
P. S. Kelkar ◽  
D. M. Dharmadhikari ◽  
M. Z. Hasan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Adsorption Capacity ◽  
Adsorption Process ◽  
Adsorption Equilibrium ◽  
Light Metal ◽  
Mercury Removal ◽  
High Adsorption ◽  
Surface Sites ◽  
Ph Values ◽  
High Adsorption Capacity

Steamed Hoof Powder (SHP), size < 53μ, was observed to have high adsorption capacity for Hg(II) with >95% removal from a solution containing 100 mg/L of Hg(II) with only 0.1% (W/V) concentration of SHP. The SHP has good settling properties and gives clear and odour free effluent. Studies indicate that pH values between 2 and 10 have no effect on the adsorption of Hg(II) on SHP. Light metal ions like Na+, K+, Ca2+ and Mg2+ up to concentrations of 500 mg/L and heavy metals like Cu2+, Zn2+, Cd2+, Co2+, Pb2+, Ni2+, Mn2+, Cr3+, Cr6+, Fe2+ and Fe3+ up to concentrations of 100 mg/L do not interfere with the adsorption process. Anions like sulphate, acetate and phosphate up to concentrations of 200 mg/L do not interfere. Chloride interferes in the adsorption process when Hg(II) concentration is above 9.7 mg/L. The adsorption equilibrium was established within two hours. Studies indicate that adsorption occurs on the surface sites of the adsorbent.

scholarly journals Effective Poly (Cyclotriphosphazene-Co-4,4′-Sulfonyldiphenol)@rGO Sheets for Tetracycline Adsorption: Fabrication, Characterization, Adsorption Kinetics and Thermodynamics

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1540
Author(s):  
Muhammad Ahmad ◽  
Tehseen Nawaz ◽  
Mohammad Mujahid Alam ◽  
Yasir Abbas ◽  
Shafqat Ali ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
High Adsorption ◽  
Clean Environment ◽  
Equilibrium Data ◽  
Langmuir Isotherm Model ◽  
High Adsorption Capacity ◽  
Adsorption Equilibrium Data

The development of excellent drug adsorbents and clarifying the interaction mechanisms between adsorbents and adsorbates are greatly desired for a clean environment. Herein, we report that a reduced graphene oxide modified sheeted polyphosphazene (rGO/poly (cyclotriphosphazene-co-4,4′-sulfonyldiphenol)) defined as PZS on rGO was used to remove the tetracycline (TC) drug from an aqueous solution. Compared to PZS microspheres, the adsorption capacity of sheeted PZS@rGO exhibited a high adsorption capacity of 496 mg/g. The adsorption equilibrium data well obeyed the Langmuir isotherm model, and the kinetics isotherm was fitted to the pseudo-second-order model. Thermodynamic analysis showed that the adsorption of TC was an exothermic, spontaneous process. Furthermore, we highlighted the importance of the surface modification of PZS by the introduction of rGO, which tremendously increased the surface area necessary for high adsorption. Along with high surface area, electrostatic attractions, H-bonding, π-π stacking and Lewis acid-base interactions were involved in the high adsorption capacity of PZS@rGO. Furthermore, we also proposed the mechanism of TC adsorption via PZS@rGO.

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