A new water-soluble polycarbobetaine showing high selectivity toward copper

Mouton, Julia; Turmine, Mireille; Coudane, Jean

doi:10.1016/j.cej.2015.08.058

Cited by 11 publications

(7 citation statements)

References 49 publications

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“…In addition to these results, no desorption of copper occurred in favor of nickel, manganese, zinc, calcium, magnesium (0 < R < 10) or cobalt complexation (0 < R < 50). This observation agreed with previous results about the selective complexation of copper by other polycarbobetaines [15]. …”

Section: Pceac Selectivity To Coppersupporting

confidence: 83%

“…Figure 5 confirms that the efficiency of copper adsorption was maintained over five cycles of PCEAC reuse (99 ± 3%) as previously reported for other polycarbobetaines [15]. …”

Section: Pceac Reusabilitysupporting

confidence: 73%

“…By comparing our results to the maximum adsorption capacities of various natural and synthetic materials recently studied for copper recovery from waste or wastewater [15], PCEAC clearly appears as a promising agent for these applications.…”

Section: Copper Adsorption Onto Pceacmentioning

confidence: 99%

“…The characteristics of the electrochemical method were previously published [15]. The pH was also recorded using a PHM250 ion analyzer equipped with a glass electrode (Radiometer pHG301) and the same mercurous sulfate reference electrode.…”

Section: Methodsmentioning

confidence: 99%

“…All the equations are given in Table 2. The amount of copper adsorbed (mg g −1 ) at equilibrium (Qe), defined as the soluble and precipitated fractions of PCEAC/Cu complex, was calculated from the mass balance of initial and final copper concentrations as previously reported [15].…”

Section: Sorption Experimentsmentioning

confidence: 99%

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A water-soluble polycarbobetaine for sustainable copper recovery

Mouton¹,

Turmine²,

Coudane³

2016

Int. J. SDP

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This study targets betaine-type polymers (polycarbobetaines -PCBets) as complexing agent of metal ions. As PCBets are pH-sensitive, the adsorption isotherms of copper onto PCBet were monitored at various pH (from 3 to 6) by electrochemical measurements. The best fit to the Langmuir model translates the predominantly homogeneous distribution of the chelating groups on the polymer chains because the Langmuir equation assumes that the adsorbent surface is energetically homogeneous. The results obtained for the complexation of copper were greatly enhanced as the pH increase and reached 250 ± 10 mg g −1 at pH = 6. Such maximal adsorption capacities compete with recent results obtained for molecules of environmental interest such as chitosan, for example. The copper adsorption efficiency was shown stable for soft to hard water. The selectivity of the target PCBets for copper was indicated in the presence of nickel, cobalt, manganese, zinc, calcium or magnesium and partially accounts for the interest in this material and demonstrated the relevance of using PCBet in environmental applications such as copper recovery. The reusability of PCBet was explored by pH adjustment. The results confirm that the efficiency of copper adsorption was maintained over five cycles of PCBet reuse (99 ± 3%). A full process for copper recovery was then designed at laboratory scale for copper recovery from synthetic wastewaters.

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Section: Pceac Selectivity To Coppersupporting

confidence: 83%

“…Figure 5 confirms that the efficiency of copper adsorption was maintained over five cycles of PCEAC reuse (99 ± 3%) as previously reported for other polycarbobetaines [15]. …”

Section: Pceac Reusabilitysupporting

confidence: 73%

Section: Copper Adsorption Onto Pceacmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Sorption Experimentsmentioning

confidence: 99%

See 3 more Smart Citations

A water-soluble polycarbobetaine for sustainable copper recovery

Mouton¹,

Turmine²,

Coudane³

2016

Int. J. SDP

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Synthesis of a New Poly(ε‐caprolactone)‐g‐Chitosan Amphiphilic Graft Copolymer with a “Reverse” Structure

Delorme

David

Dejean

et al. 2023

Macromol. Rapid Commun.

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Hydrophilic chitosan (CHT) and hydrophobic polyε‐caprolactone (PCL) are well‐known biocompatible and biodegradable polymers that have many applications in the biomedical and pharmaceutical fields. But the mixtures of these two compounds are considered incompatible, which makes them not very interesting. To avoid this problem and to further extend the properties of these homopolymers, the synthesis of a new graft copolymer, the fully biodegradable amphiphilic poly(ε‐caprolactone‐g‐chitosan) (PCL‐g‐CHT) is described, with an unusual “reverse” structure formed by a PCL backbone with CHT grafts, unlike the “classic” CHT‐g‐PCL structure with a CHT main chain and PCL grafts. This copolymer is prepared via a copper‐catalyzed 1,3‐dipolar Huisgen cycloaddition between propargylated PCL (PCL‐yne) and a new azido‐chitosan (CHT‐N3). In order to obtain an amphiphilic copolymer regardless of the pH, chitosan oligomers, soluble at any pH, are prepared and used. The amphiphilic PCL‐g‐CHT copolymer spontaneously self‐assembles in water into nanomicelles that may incorporate hydrophobic drugs to give novel drug delivery systems.

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