Novel Magnetic Fly Ash/Poly(acrylic acid) Composite Microgel for Selective Adsorption of Pb(II) Ion: Synthesis and Evaluation

2014 ◽  
Vol 53 (8) ◽  
pp. 2924-2931 ◽  
Author(s):  
Liping Jiang ◽  
Peng Liu
Keyword(s):  
Fly Ash ◽  
Acrylic Acid ◽  
Selective Adsorption ◽  
Poly Acrylic Acid

Synthesis and Properties of Potassium-Containing Poly(Acrylic Acid Sodium-Co-Acrylamide)Fly Ash-Illite Superabsorbent Composite

2011 ◽  
Vol 239-242 ◽  
pp. 59-63
Author(s):  
Shang Yue Shen ◽  
Kai Sheng Xia ◽  
Hui Ling ◽  
Li Ren Fan
Keyword(s):  
Fly Ash ◽  
Acrylic Acid ◽  
Tap Water ◽  
Low Cost ◽  
Absorption Spectrometry ◽  
Soil Improvement ◽  
Good Effect ◽  
Republic Of China ◽  
Superabsorbent Composite ◽  
Poly Acrylic Acid

The fly ash with a loose and porous structure has definite absorbent ability, which has a good effect on soil improvement. Illite belongs to clay minerals, it has absorbent ability and higher potassium, which can improve the soil fertility. In this study, poly(acrylic acid sodium-co-acrylamide)(PAANa-AM)/fly ash-illite superabsorbent composite was firstly prepared by solution polymerization. The structures were characterized using scanning electron microscope, X-ray diffraction, and infrared spectrum. The results showed that the fly ash and illite dispersed well in the composite. The K+ in illite was replaced by Na+ in acrylic acid sodium and thus the illite structure turned into paragonite during the process of preparing composite, however, the structure of fly ash was maintained in the composite. Moreover, the hydroxide radical in illite reacted with the carbonyl group in acrylic acid during polymerization. The best absorbent capacities of the composite in distilled water, tap water and normal saline were 1695, 445 and 106 g/g, respectively, which exceeded the requirements of The National 863 Program and Ministry of Agriculture of People’s Republic of China. The potassium release was measured using atomic absorption spectrometry and the results indicated that the composite can release 12.80% of the potassium ion in fly ash and illite. The superabsorbent material has low cost and favors improvement of soil and potassium-deficiency.

Selective Adsorption and Separation of Organic Dyes by Poly(acrylic acid) Hydrogels Formed with Spherical Polymer Brushes and Chitosan

2018 ◽  
Vol 71 (11) ◽  
pp. 846 ◽  
Author(s):  
Rui Zhang ◽  
Hongwei Peng ◽  
Tianxu Zhou ◽  
Min Li ◽  
Xuhong Guo ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Polymer Brushes ◽  
Electrostatic Interactions ◽  
Separation Efficiency ◽  
Organic Dyes ◽  
Selective Adsorption ◽  
Cationic Dyes ◽  
Order Kinetic ◽  
Double Network ◽  
Poly Acrylic Acid

Direct discharge of industry organic dyes has caused serious environmental pollution. In this study, a series of double network poly(acrylic acid) (PAA) hydrogels were fabricated with spherical polymer brushes (SPBs) and chitosan (CS) as crosslinker. Neutral spherical polyelectrolyte brushes of polystyrene–poly-N-isopropylacrylamide (PNIPAM@PS) in which poly(N-isopropylacrylamide) (PNIPAM) arms were grafted on polystyrene (PS) nanospheres, were employed as macro-crosslinkers. The innumerable hydrogen bonds both between the highly entangled PAA chains and between PNIPAM and the PAA chains composed the first network of the hydrogels. The electrostatic interactions between CS and the PAA chains formed the second network of the hydrogels. These double network hydrogels, named PNIPAM@PS/CS/PAA, achieve good compressive performance and a low swell ratio because of their compact structure through plentiful hydrogen bonding and electrostatic interactions. The hydrogel could absorb cationic dyes from water with high separation efficiency and selectivity due to the electrostatic interaction between the carboxy groups and dye molecules. The adsorption process fitted a pseudo-second-order kinetic model and Langmuir isotherm model very well. Moreover, the hydrogel can separate cationic dyes from mixed dye solutions through electrostatic interactions. After being loaded with silver nanoparticles, the obtained silver@hydrogel exhibited a good capacity for the photocatalytic degradation towards different dyes. The hydrogels are promising for dye-containing wastewater treatment.

scholarly journals Preparation and Applications of Salt-Resistant Superabsorbent Poly (Acrylic Acid-Acrylamide/Fly Ash) Composite

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 596 ◽  
Author(s):  
Wenjuan Zhu ◽  
Yagang Zhang ◽  
Penglei Wang ◽  
Zhiyong Yang ◽  
Akram Yasin ◽  
...  
Keyword(s):  
Fly Ash ◽  
Acrylic Acid ◽  
Pure Water ◽  
Polymerization Temperature ◽  
Mass Ratio ◽  
Nacl Solution ◽  
Absorption Performance ◽  
Ft Ir ◽  
Optimized Conditions ◽  
Poly Acrylic Acid

Solution polymerization synthesized alt-resistant superabsorbent poly (acrylic acid-acrylamide/fly ash) composites. The mass ratio of acrylic acid (AA) to acrylamide (AM), the concentration of crosslinker, the neutralization degree (ND) of AA, and the polymerization temperature were investigated by single-factor method. Optimized conditions for the synthesis of poly (acrylic acid-acrylamide/fly ash) (PAA-AM/FA) are, as following: m (AA)/m (AM) is 1.5, the content of crosslinker N, N-methylenebisacrylamide. (MBA) is 0.7%, neutralization degree of AA is 70%, polymerization temperature is 70 °C, and fly ash (FA) content is 50%. The prepared PAA-AM/FA demonstrated superior water absorption performance. The absorption capacities of PAA-AM/FA for pure water and 0.9% NaCl solution were found to be 976 g·g−1 and 81 g·g−1, respectively. Furthermore, PAA-AM/FA was found to have excellent adsorption capacity (148 mg·g−1) for Rhodamine B in water. Fourier Transform-Infrared Spectroscopy (FT-IR), Thermogravimetric Analysis (TGA), and Scanning Electron Microscopy (SEM) characterized the prepared materials. Results showed that fly ash was incorporated into the macromolecular polymer matrix and played a key role in improving the performance of the polymer composites.

scholarly journals Study on the cross-linked molecularly imprinted poly(methacrylic acid) and poly(acrylic acid) towards selective adsorption of diuron

2016 ◽  
Vol 100 ◽  
pp. 26-36 ◽  
Author(s):  
Ademar Wong ◽  
Fernanda Midori de Oliveira ◽  
César Ricardo Teixeira Tarley ◽  
Maria Del Pilar Taboada Sotomayor
Keyword(s):  
Acrylic Acid ◽  
Methacrylic Acid ◽  
Selective Adsorption ◽  
Molecularly Imprinted ◽  
The Cross ◽  
Poly Acrylic Acid

Soft ionic liquid based resistive memory characteristics in a two terminal discrete polydimethylsiloxane cylindrical microchannel

2020 ◽  
Vol 8 (38) ◽  
pp. 13368-13374
Author(s):  
Muhammad Umair Khan ◽  
Gul Hassan ◽  
Jinho Bae
Keyword(s):  
Ionic Liquid ◽  
Acrylic Acid ◽  
Sodium Hydroxide ◽  
Sodium Salt ◽  
Resistive Memory ◽  
Cylindrical Microchannel ◽  
Memory Characteristics ◽  
Poly Acrylic Acid

This paper proposes a novel soft ionic liquid (IL) electrically functional device that displays resistive memory characteristics using poly(acrylic acid) partial sodium salt (PAA-Na+:H2O) solution gel and sodium hydroxide (NaOH) in a thin polydimethylsiloxane (PDMS) cylindrical microchannel.

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