Ion-exchange kinetics and thermal decomposition characteristics of Fe2+-exchanged alginic acid membrane for the formation of iron oxide nanoparticles

Wang, Zihua; Liu, Jia; Kale, Girish M.; Ghadiri, Mojtaba

doi:10.1007/s10853-014-8423-9

Cited by 11 publications

(5 citation statements)

References 20 publications

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“…In the last step, by increasing the temperature from 330°C to around 500°C, the residues of carbonaceous material is oxidized by showing approximately 28.48 ± 0.075% weight-loss, resulting in an exothermic decomposition peak.. In other studies, it has been mentioned that the a-L-guluronic acid (G) and b-D-mannuronic acid (M) residues in the alginate structure are completely oxidized in the last step of TGA profile [35,39]. No additional weight loss was noted above 500°C.…”

Section: Resultsmentioning

confidence: 99%

“…"Green synthesis" has been considered as an efficient emerging technique to reduce the generation of hazardous waste for synthesizing high demanding products such as nanocomposites [32][33][34][35][36][37][38]. Amongst the "green" materials utilized in "green synthesis" methods, polysaccharides have been found to be a dominant category due to their massive availability, unique organic nature, and less requirements for further purification steps [39]. Synthesis of GDC powder using renewable resources such as maltose and sucrose with pectin have been reported by a sol-gel method [38,40].…”

Section: Introductionmentioning

confidence: 99%

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Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

Pezeshkpour

Abdullah

Salamatinia

et al. 2017

Ceramics International

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

Pezeshkpour

Abdullah

Salamatinia

et al. 2017

Ceramics International

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“…These results were consistent whether assessed through on-line pH or off-line ICP-AES technology. This can be explained that a rapid cation exchange reaction occurred upon the interaction between the alginic acid granules and the Y 3+ solution [ 7 ]. To further study the cation exchange reaction mechanism, the 1st-order [ 23 ], as well as the 2nd-order models [ 24 ] were used to effectively fit and analyze the obtained experimental data.…”

Section: Resultsmentioning

confidence: 99%

“…However, the kinetics of the cation exchange process involving sodium alginate and metal salt solutions has been rarely studied. The relevant study used off-line inductively coupled plasma-atomic emission spectrometry (ICP-AES) to demonstrate a consistent cation exchange kinetics mechanism between Fe 2+ in an aqueous solution and H + derived from alginic acid [ 7 ]. Although ICP-AES technology has certain advantages in the detection of metal ion concentration, the measurement of cation exchange reaction rates is relatively complicated.…”

Section: Introductionmentioning

confidence: 99%

On-Line pH Measurement Cation Exchange Kinetics of Y3+-Exchanged Alginic Acid for Y2O3 Nanoparticles Synthesis

Liu,

Zhou,

Zhang

et al. 2024

Nanomaterials

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A new sol-gel method that employs cation exchange from an aqueous metal ion solution with H+ ions of granulated alginic acid was developed for synthesizing high-purity Y2O3 nanoparticles. In this study, the cation exchange kinetics of H+~Y3+ in aqueous solution were analyzed using on-line pH technology and off-line inductively coupled plasma-atomic emission spectrometry (ICP-AES) analysis. Pseudo 2nd-order models were utilized to evaluate the parameters of the kinetics, suggesting that the concentration of H+~Y3+ involved in the cation exchange reaction was 1:1.733. Further, a comprehensive understanding of the Y-ALG calcination process was developed using thermo-gravimetric analysis, along with results obtained from differential scanning calorimetry (TGA/DSC). A detailed analysis of the XRD Rietveld refinement plots revealed that the crystallite sizes of Y2O3 nanoparticles were about 4 nm (500 °C) and 15 nm (800 °C), respectively. Differential pulse voltammetry (DPV) was employed to investigate the electrochemical oxidation of catechol. The oxidation peak currents of catechol at Y2O3 (500 °C)/GCE and Y2O3 (800 °C)/GCE showed two stages linear function of concentration (2.0~20.0 × 10−6 mol/L, 20.0~60.0 × 10−6 mol/L). The results indicated that the detection limits were equal to 2.4 × 10−7 mol/L (Y2O3 (500 °C)/GCE) and 7.8 × 10−7 mol/L (Y2O3 (800 °C)/GCE). The study not only provided a method to synthesize metal oxide, but also proposed a promising on-line pH model to study cation exchange kinetics.

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“…Аналогичным образом происходит связывание никеля [31], а также цинка и свинца [32]. Связывание железа во многом происходит за счет ионообменного процесса [33].…”

Section: механизмы накопления тяжелых металлов мышьяка алюминия и йодаunclassified

Elemental Composition of Kelp Thalli (<i>Laminariae thalli</i>) of Various Origins

Щукин¹,

Blinkova²,

Кузьмина³

et al. 2023

Vedomosti Nauchnogo tsentra ekspertizy sredstv meditsinskogo pr

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Brown seaweeds (Laminariaceae) vary considerably in the content of toxic and essential elements; these variations depend on the taxonomic group and geographical factors. Seaweeds are extensively used in the food industry and widely applied in medicine for both humans and animals. Therefore, it is relevant to examine the correlation between the elemental composition and the geographical origin of kelp thalli obtained from different sources.The aim of the study was to collect, collate, and analyse primary and secondary data on the accumulation of essential, toxic and potentially carcinogenic elements, including iodine, in the thalli of brown seaweeds (Laminariaceae).Materials and methods. This study investigated the concentrations of 17 elements in Laminaria spp. (Al, As, Cd, Cr, Co, Cu, Fe, Hg, Mn, Mo, Ni, Se, Pb, Sr, V, Zn, and I). Experiments were conducted on an Agilent 7900 inductively coupled plasma mass spectrometer. The authors studied publications on the elemental composition of brown seaweeds (Laminariaceae) using literature search and data analysis methods.Results. This article reflects the updated classification of brown seaweeds (Laminariaceae) and summarises information about the mechanisms by which iodine and other elements accumulate in the thallus. The authors established species-specific variations in the order of element uptake and in the accumulation of elemental toxicants. The mutual influence of elements on their accumulation in brown seaweeds (Laminariaceae) was evaluated using Spearman’s rank correlation coefficients.Conclusions. The study results can inform the implementation of a risk-based quality control strategy for herbal medicinal products aimed at reducing human exposure to toxic elements. The authors suggest that the upper limit of iodine content in kelp-based food products should be standardised.

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Ion-exchange kinetics and thermal decomposition characteristics of Fe2+-exchanged alginic acid membrane for the formation of iron oxide nanoparticles

Cited by 11 publications

References 20 publications

Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

Ionic–gelation synthesis of gadolinium doped ceria (Ce 0.8 Gd 0.2 O 1.90 ) nanocomposite powder using sodium-alginate

On-Line pH Measurement Cation Exchange Kinetics of Y3+-Exchanged Alginic Acid for Y2O3 Nanoparticles Synthesis

Elemental Composition of Kelp Thalli (<i>Laminariae thalli</i>) of Various Origins

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