Shaping polyelectrolyte composites for heavy metals adsorption from wastewater: Experimental assessment and equilibrium studies

Morosanu, Irina; Păduraru, Carmen; Bucătariu, Florin; Fighir, Daniela; Mihai, Marcela; Teodosiu, Carmen

doi:10.1016/j.jenvman.2022.115999

Cited by 9 publications

(8 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The IS/(PEI-PAA) c and IS/(PEI-PMAA) c composite sorbents were synthesized following the methodology outlined in our previous research [ 10 ]. Specifically, 5.0 g of silica microparticles was suspended in 12 mL of 1 mol/L PEI, followed by the gradual addition of 6 mL of either PAA or PMAA, also at a concentration of 1 mol/L, under vigorous agitation until the solution achieved transparency.…”

Section: Methodsmentioning

confidence: 99%

“…During testing, these core–shell inorganic–organic microparticles displayed different sorption capacities for each class of pollutants, as functions of the polyanion nature and degree of cross-linking. These materials were previously characterized using scanning electron microscopy, FTIR-ATR, thermogravimetric analysis and polyelectrolyte and potentiometric titrations [ 10 ]. The main characteristics of these four composite materials are presented in Table 1 .…”

Section: Methodsmentioning

confidence: 99%

“…The removal of these micropollutants from wastewater to make it reusable is a mandatory requirement. In addition, the recovery of heavy metals from waste effluents provides a valuable resource for these indispensable materials that are widely used in all sectors of society and constitute key materials for renewable energy development [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…have gained popularity in wastewater treatment applications. Thus, Morosanu et al [ 10 ] compared the sorption performances of twelve PEI/SiO 2 composite sorbents prepared by a classic layer-by-layer (LbL) method and a novel one-pot deposition approach to remove cadmium ions from aqueous solutions in a batch mode. The sorbents obtained using the one-pot approach exhibited maximum sorption capacities, between 67 and 82.8 mg/g polymer from composite, superior to sorbents obtained by the LbL method.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Removal of Diclofenac and Heavy Metal Ions from Aqueous Media Using Composite Sorbents in Dynamic Conditions

Fighir,

Paduraru,

Ciobanu

et al. 2023

Nanomaterials

Self Cite

View full text Add to dashboard Cite

Pharmaceuticals and heavy metals pose significant risks to human health and aquatic ecosystems, necessitating their removal from water and wastewater. A promising alternative for this purpose involves their removal by adsorption on composite sorbents prepared using a conventional layer-by-layer (LbL) method or an innovative coacervate direct deposition approach. In this study, four novel composite materials based on a silica core (IS) and a polyelectrolyte coacervate shell were used for the investigation of dynamic adsorption of three heavy metals (lead, nickel and cadmium) and an organic drug model (diclofenac sodium salt, DCF-Na). The four types of composite sorbents were tested for the first time in dynamic conditions (columns with continuous flow), and the column conditions were similar to those used in wastewater treatment plants. The influence of the polyanion nature (poly(acrylic acid) (PAA) vs. poly(sodium methacrylate) (PMAA)), maintaining a constant poly(ethyleneimine) (PEI), and the cross-linking degree (r = 0.1 and r = 1.0) of PEI chains on the immobilization of these pollutants (inorganic vs. organic) on the same type of composite was also studied. The experiments involved both single- and multi-component aqueous solutions. The kinetics of the dynamic adsorption process were examined using two non-linear models: the Thomas and Yoon–Nelson models. The tested sorbents demonstrated good adsorption capacities with affinities for the metal ions in the following order: Pb2+ > Cd2+ > Ni2+. An increase in the initial diclofenac sodium concentration led to an enhanced adsorption capacity of the IS/(PEI-PAA)c-r1 sorbent. The calculated sorption capacities were in good agreement with the adsorption capacity predicted by the Thomas and Yoon–Nelson models. The substantial affinity observed between DCF-Na and a column containing composite microparticles saturated with heavy metal ions was explained.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Removal of Diclofenac and Heavy Metal Ions from Aqueous Media Using Composite Sorbents in Dynamic Conditions

Fighir,

Paduraru,

Ciobanu

et al. 2023

Nanomaterials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Natural and synthetic polymers are also of interest for water cleaning purposes. They can be used as flocculants, coatings for membranes, and also for the low-cost fabrication of different types of sorbents for pollutants such as fibers [19], resins [20], or core-shell particles [21]. The main advantage of polymer-based composite materials is that they can be successfully employed as sorbents for a variety of pollutants as demonstrated by the extensive research in this field [22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Sand/Polyethyleneimine Composites with Enhanced Sorption/Desorption Properties toward Pollutants

Bucătariu¹,

Petrila²,

Zaharia³

et al. 2022

Water

Self Cite

View full text Add to dashboard Cite

The direct deposition of polyethyleneimine (PEI), a weak polycation with a large content of amino groups, onto sand fractions with different sizes (F70, F100, F200, and F355), resulted in versatile core-shell sorbents for water cleaning. Herein, PEI and the weak polyanion poly(acrylic acid) (PAA) were directly precipitated as an nonstoichiometric polyelectrolyte complex ([PEI]:[PAA] = 2:1) onto a sand surface followed by cross-linking with glutaraldehyde (GA) at three molar ratios ([CHO]:[amine] = 1:10; 1:5; 1:1 = r). Non-crosslinked polyelectrolyte chains were washed out in strongly basic (pH 14) and acidic (pH 0) media. The sand/PEI-GA composites were evaluated to determine the organic shell stability using swelling experiments and X-ray photoelectron spectroscopy. The sorbed/desorbed amount of two model pollutants (copper ions and bromocresol green) in column experiments depended on the sand fraction size and cross-linking degree of the PEI shell. The maximum recorded values, after five loading/release cycles of pollutant species onto F70/PEI-GAr, F100/PEI-GAr, F200/PEI-GAr, and F355/PEI-GAr, were situated between the 0.7–5.5 mg Cu2+/mL column and 3.7–15 mg BCG/mL column. Sand/PEI-GAr composites could act as promising sorbents, low-cost and eco-friendly, which could be applied for water purification procedures.

show abstract

The polyelectrolyte as corrosion inhibitor for the aluminum anode in alkaline-based primary battery: A comparative study with its monomer

Wu,

Xiao,

Wei

et al. 2024

Corrosion Science

View full text Add to dashboard Cite

Shaping polyelectrolyte composites for heavy metals adsorption from wastewater: Experimental assessment and equilibrium studies

Cited by 9 publications

References 49 publications

Removal of Diclofenac and Heavy Metal Ions from Aqueous Media Using Composite Sorbents in Dynamic Conditions

Removal of Diclofenac and Heavy Metal Ions from Aqueous Media Using Composite Sorbents in Dynamic Conditions

Sand/Polyethyleneimine Composites with Enhanced Sorption/Desorption Properties toward Pollutants

The polyelectrolyte as corrosion inhibitor for the aluminum anode in alkaline-based primary battery: A comparative study with its monomer

Contact Info

Product

Resources

About