Water-soluble functional polymers in conjunction with membranes to remove pollutant ions from aqueous solutions

Rivas, Bernabé L.; Pereira, Eduardo; Palencia, Manuel; Sánchez, Julio

doi:10.1016/j.progpolymsci.2010.11.001

Cited by 163 publications

(145 citation statements)

References 180 publications

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“…In the case of polymer PAAd45, this change caused removal of up to 90% of the zinc. This increased removal efficiency is attributed to greater interaction between the polymer and the metal, due to the rise in pH, given that a high removal percentage is found in divalent and trivalent metal ions in pH above 3 (Rivas et al, 2011), as observed in Figures 2, 3 and 4. In polymers PAAd34 and PAAd45, those with the lowest ionic charge, the increase in pH led to a considerable rise in removal efficiency (mean of 50% and 80% for PAAd34 and PAAd45, respectively).…”

Section: Effect Of Phmentioning

confidence: 80%

Removal of Cu2+ and Zn2+ from aqueous medium using ionic polyacrylamides

Nascimento¹,

Nunes²,

Melo³

et al. 2017

Issue 2

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The wastewater produced by the galvanoplasty industryis a serious environmental problem due to the high concentrations of heavy metals. In this study polymers were used in ionic flocculation to treat synthetic wastewater containing metals, applying four types of polyacrylamides with different ionic loads as agents to remove copper and zinc. Metal removal efficiency was assessed considering the influence of polymer concentration, ionic load and pH. Selectivity (Cu 2+ /Zn 2+ ) at different polymer concentrations was also evaluated. The results confirm that polyacrylamide is efficient in treating wastewater containing heavy metals. These experiments exhibited removal efficiency of around 40% and pH= 4,5; however, efficiency was more than 80% with pH= 7.0 under the same conditions, when polyacrylamides with average ionicity were used.

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Section: Effect Of Phmentioning

confidence: 80%

Removal of Cu2+ and Zn2+ from aqueous medium using ionic polyacrylamides

Nascimento¹,

Nunes²,

Melo³

et al. 2017

Issue 2

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show abstract

“…Possessing many polar carboxyl groups in its structure, poly(acrylic acid) (PAA) has shown a great ability to form strong complexes with metal ions in solution [7,8,[27][28][29]. The high water solubility and weak structural stability of PAA, however, hinders application of this polymer to remove heavy metal ions from wastewater.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…In fact, the final pH of the solution decreased gradually with increasing initial concentration of Pb(II). PAA-Bent composite has lots of -COOH functional groups, which can be dissociated and released protons while bonding the Pb(II) ions [7,8,[27][28][29]. temperature indicates the sorption was more spontaneous and favorable at higher temperatures [53,54].…”

Section: Effect Of Temperature On Pb Sorption Efficiencymentioning

confidence: 99%

Kinetics and thermodynamics of Pb sorption onto bentonite and poly(acrylic acid)/bentonite hybrid sorbent

Rafiei

Shirvani

Ogunseitan

2016

Desalination and Water Treatment

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“…Other applications include drug delivery [4], flocculation for water recovery in oil sand tailings [5], and metal ion recovery [6]. The bio-derived monomers α-methylene-γ-butyrolactone (MBL) and γ-methyl-α-methylene-γ-butyrolactone (MeMBL) have previously been homopolymerized [7,8] and copolymerized with styrene (ST) and methyl methacrylate (MMA) [9,10], but in bulk or organic solution.…”

Section: Introductionmentioning

confidence: 99%

Radical Copolymerization Kinetics of Bio-Renewable Butyrolactone Monomer in Aqueous Solution

Luk

Hutchinson

2017

Processes

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Abstract:The radical copolymerization kinetics of acrylamide (AM) and the water-soluble monomer sodium 4-hydroxy-4-methyl-2-methylene butanoate (SHMeMB), formed by saponification of the bio-sourced monomer γ-methyl-α-methylene-γ-butyrolactone (MeMBL), are investigated to explain the previously reported slow rates of reaction during synthesis of superabsorbent hydrogels. Limiting conversions were observed to decrease with increased temperature during SHMeMB homopolymerization, suggesting that polymerization rate is limited by depropagation. Comonomer composition drift also increased with temperature, with more AM incorporated into the copolymer due to SHMeMB depropagation. Using previous estimates for the SHMeMB propagation rate coefficient, the conversion profiles were used to estimate rate coefficients for depropagation and termination (k t ). The estimate for k t,SHMeMB was found to be of the same order of magnitude as that recently reported for sodium methacrylate, with the averaged copolymerization termination rate coefficient dominated by the presence of SHMeMB in the system. In addition, it was found that depropagation still controlled the SHMeMB polymerization rate at elevated temperatures in the presence of added salt.

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Water-soluble functional polymers in conjunction with membranes to remove pollutant ions from aqueous solutions

Cited by 163 publications

References 180 publications

Removal of Cu2+ and Zn2+ from aqueous medium using ionic polyacrylamides

Removal of Cu2+ and Zn2+ from aqueous medium using ionic polyacrylamides

Kinetics and thermodynamics of Pb sorption onto bentonite and poly(acrylic acid)/bentonite hybrid sorbent

Radical Copolymerization Kinetics of Bio-Renewable Butyrolactone Monomer in Aqueous Solution

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