Highly efficient removal of copper ions from water using poly(acrylic acid)-grafted chitosan adsorbent

Lin, Ying; Hong, Yan; Song, Qiusheng; Zhang, Ze; Gao, Jiangang; Tao, Tingxian

doi:10.1007/s00396-017-4042-8

Cited by 47 publications

(18 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on previous research 7 , the CS-g-poly (AN-AA) was prepared. 0.1 mg of Cs was dissolved in 25 ml of 5% acetic acid, then take 0.1 of K2S2O8in the solution of CS for 10 min with magnetic stirring in the reflux.…”

Section: Chitosan Grafted Poly (Acrylonitrile-co-acrylic Acid) Preparmentioning

confidence: 99%

“…In a homogeneous system, biodegradable and ultra-high content grafted chitosan-g-poly (acrylic acid) powder has been effectively synthesized and used as adsorbents to remove Cu (II) in aqueous solution. The peak adsorption capability of the Langmuir model was 210,13 mg / g, showing a remarkable increase in chitosan adsorption ability after polygrafting (acrylic acid) 7 .…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Chitosan-g-poly (acrylonitrile-co-acrylic acid) for wastewater treatment application

2020

View full text Add to dashboard Cite

Chitosan is a biodegradable natural based polymer obtained from chitin (N-deacetylated derivative), the second most abundant polysaccharide after cellulose and soluble in most organic acids. Graft copolymerization of poly (acrylonitrile-co-acrylic acid) onto chitosan has been successfully carried out using potassium persulfate as an initiator in an aqueous medium. The PAN and PAA homopolymer formed during the reaction were removed from the Chitosan grafted copolymer by Soxhlet extraction using ethanol as the solvent. The prepared graft copolymerization was characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) to confirm the formation of the copolymer. The prepared chitosan-g-copolymer at ratio 25:75% of AN-co-AA was treated with metal solutions containing cadmium ions, times and pH at room temperature. It[Am1] was found that the optimum condition was pH=5, Time 120min and dose of adsorbent 3 mg /L. The results revealed that the chitosan-g-copolymer prepared was excellent in removing the heavy metals than the copolymer alone. Hence, chitosan-g- poly- AN-co-AA could open the way for wastewater treatment. The thermal stability and the electrical conductivity for all prepared samples before and after grafing were measured. By studying the thermal stability at the different ratio of AN and AA in samples co1, co2, co3, it was found that the most thermal stability sample ratio is co3 due to increasing the ratio of AN. While in sample co1 with a high ratio of AA, the thermal stability decrease according to the fast decomposition of –COOH of acrylic acid. The conductivity was 3.85x10-7 which is more than the copolymer without chitosan, which increases the electron density of the copolymer through the end group effect. As the result of σ has a range 10-8 S/cm-1 10-6 S/cm-1so, all the prepared sample can be used as an electrostatic dissipation application.

show abstract

Section: Chitosan Grafted Poly (Acrylonitrile-co-acrylic Acid) Preparmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Chitosan-g-poly (acrylonitrile-co-acrylic acid) for wastewater treatment application

2020

View full text Add to dashboard Cite

show abstract

“…The Zeta potential of CMC-g-PAA was found to decrease from -24.2 mV to -40.0 mV with an increase in pH from 3.0 to 7.0, further confirming the above results. Moreover, the precipitation constant of Cu(OH)2 is 5.6 × 10 -20 , corresponding to Cu(II) precipitation at pH = 7.4, which means that the precipitation might play an important role beyond 7.4 [22]. Based on these points, to avoid the formation of precipitation in the aqueous solution, the pH of 6.0 was selected as the initial pH value of Cu(II) solution for subsequent adsorption experiment.…”

Section: Adsorption Propertiesmentioning

confidence: 99%

Synthesis of Poly(acrylic acid)-Grafted Carboxymethyl Cellulose for Efficient Removal of Copper Ions

Lin¹,

Cao²,

Song³

et al. 2019

Journal of Renewable Materials

Self Cite

View full text Add to dashboard Cite

Biocompatible and high content grafted carboxymethyl cellulose-gpoly(acrylic acid) powder was successfully synthesized in an aqueous system, and used as adsorbents for the removal of Cu(II) in aqueous solution. The copolymer was characterized by FT-IR and SEM techniques. Graft copolymerization introduced a large number of carboxyl groups in the polymer and caused the micro-surface of the material to be porous. The fundamental adsorption behaviors of the material were studied. The adsorption kinetics was well fitted with pseudo-second order equation, while the adsorption isotherm preferred to be described the Langmuir equation. The maximum adsorption capacity obtained from the Langmuir model was 154.32 mg/g, indicating that the adsorption capacity of carboxymethyl cellulose was improved remarkably after grafting poly(acrylic acid). Moreover, Fourier transform infrared spectroscopy (FT-IR) has been used to investigate the adsorption mechanisms at molecular levels, which revealed that carboxyl groups are facile to form bidentate carboxylates with metal ions. Thus, this environment friendly copolymer will be a promising candidate for application in removal of heavy metal ions.

show abstract

“…49,50 Since transition metal cations like Ni 2+ and Cu 2+ tend to form hydroxide in these conditions, sorption materials efficient at acidic pH need to be developed. The COPEC approach offers a simple route for elaborating sorbent materials that can be processed into membranes, fibers, and powders, 49 ultimately allowing a direct separation from clean water.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

pH-Responsive Saloplastics Based on Weak Polyelectrolytes: From Molecular Processes to Material Scale Properties

et al. 2018

View full text Add to dashboard Cite

Compact polyelectrolyte complexes (COPECs), also named saloplastics, represent a new class of material with high fracture strain and self-healing properties. Here, COPECs based on poly-(methacrylic acid) (PMAA) and poly(allylamine hydrochloride) (PAH) were prepared by centrifugation at pH 7. The influence of postassembly pH changes was monitored chemically by ATR-FTIR, ICP, DSC, and TGA, morphologically by SEM, and mechanically by strain to break measurements. Postassembly pH stimuli misbalanced the charge ratio in COPECs, impacting their concentration in counterions, cross-link density, and polymer chain mobility. At the material level, changes were observed in the porosity, composition, water content, and mechanical properties of COPECs. The cross-link density was a prominent factor governing the saloplastic's composition and water content. However, the porosity and mechanical properties were driven by several factors including salt-induced plasticization and conformational changes of polyelectrolytes. This work illustrates how multiple-scale consequences arise from a single change in the environment of COPECs, providing insights for future design of stimuli-responsive materials.

show abstract

Highly efficient removal of copper ions from water using poly(acrylic acid)-grafted chitosan adsorbent

Cited by 47 publications

References 26 publications

Chitosan-g-poly (acrylonitrile-co-acrylic acid) for wastewater treatment application

Chitosan-g-poly (acrylonitrile-co-acrylic acid) for wastewater treatment application

Synthesis of Poly(acrylic acid)-Grafted Carboxymethyl Cellulose for Efficient Removal of Copper Ions

pH-Responsive Saloplastics Based on Weak Polyelectrolytes: From Molecular Processes to Material Scale Properties

Contact Info

Product

Resources

About