Untitled

Iditoiu, C.; Segal, E.; Chambree, Dorina

doi:10.1023/a:1010171222225

Cited by 8 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The next step is the same profile for all, the maximum rate was observed at 293.8 • C, 298.7 • C, and 297.9 • C for CA#2, CA#3, and CA#4 respectively with loss percent around 21.34%, 30.51%, and 25% respectively. This stage is assigned to depolymerization, cleavage of the crosslinking bonds (i.e., around 120 • C), and degradation of functional groups (i.e., amines and hydroxyls)(around 180 • C) [59,60].…”

Section: Thermogravimetric Analysis and Textural Properties (N 2 Adsorption)mentioning

confidence: 99%

Synthesis of Eco-Friendly Biopolymer, Alginate-Chitosan Composite to Adsorb the Heavy Metals, Cd(II) and Pb(II) from Contaminated Effluents

Hamza

Hamad

et al. 2021

Materials

View full text Add to dashboard Cite

Efficient removal of Cd(II) and Pb(II) from contaminated water is considered a fundamental point of view. Synthetic hydrogel biopolymers based on chitosan and alginate (cost-effective and eco-friendly) were successfully designed and characterized by highly efficient removal contaminants. The sorbents are characterized by FTIR, SEM-EDX, TGA, XPS analyses and textural properties which are qualified by N2 adsorption. The sorption properties are firstly investigated by the effect of pH, sorption isotherms, uptake kinetics, and selectivity from multi-metal solution with equi-molar concentration. The sorbent with 1:3 ratios (of chitosan and alginate respectively) is the most effective for metal removal (i.e., 0.81 mmol Cd g−1 and 0.41 mmol Pb g−1). Langmuir and Sip’s models fitted better the adsorption isotherms compared to the Freundlich model. Uptake kinetics was well fitted by pseudo-first-order rate equation, while the saturation was achieved within 40 min. The sorbent shows good reproducibility through duplicate the experiments with negligible decreasing efficiency (>2.5%). The sorbent was applied for water treatment on samples collected from the industrial area (i.e., 653 and 203 times over the MCL for Cd(II) and Pb(II) respectively according to WHO). The concentration of Cd and Pb was drastically decreased in the effluents as pH increased with removal efficiency up to 99% for both elements at pH 5.8 and SD equivalent 1 g L−1 for 5 h.

show abstract

Section: Thermogravimetric Analysis and Textural Properties (N 2 Adsorption)mentioning

confidence: 99%

Synthesis of Eco-Friendly Biopolymer, Alginate-Chitosan Composite to Adsorb the Heavy Metals, Cd(II) and Pb(II) from Contaminated Effluents

Hamza

Hamad

et al. 2021

Materials

View full text Add to dashboard Cite

show abstract

“…Hence, knowledge of the thermal behavior of cation exchange resins is necessary. Abundant data exist on the thermal degradation of anion exchange resins [23][24][25] and on carboxylic cationites with low acidity [26][27]; literature seems to offer relatively poor information on polystyrene-divinylbenzene sulfonic cationites [28][29][30][31][32][33]. Therefore, in the present investigation thermal degradation of strongly acidic sulfonic cationites was performed to understand the degradation steps and to compare the relative thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Thermal Degradation Studies of Some Strongly Acidic Cation Exchange Resins

Singare¹,

Lokhande²,

Madyal³

2011

OJPC

View full text Add to dashboard Cite

The thermal degradation of some sulfonic cationites namely Amberlite IR-120, Indion-223 and Indion-225 was investigated using instrumental techniques like thermal analysis (TG) and Scanning Electron Microscopy (SEM). Fourier Transform Infrared Spectroscopy (FTIR) was used to characterize the resins degradation steps. The sulfonic cationites undergo degradation through dehydration, followed by decomposition of sulfonic acid functional groups liberating SO 2 . The thermogravimetric analysis of above cationites at higher temperature up to 520˚C, show mass loss of 61.61% and 25.43% respectively for Indion-223 and Indion-225, while Amberlite IR-120 cationite get burned off completely.

show abstract