Development of recoverable adsorbents for Cr(VI) ions by grafting of a dimethylamino group-containing monomer on polyethylene substrate and subsequent quaternization

Yamada, Kazunori; Kitao, Yoshinori; Asamoto, Hiromichi; Minamisawa, Hiroaki

doi:10.1080/09593330.2021.2020339

Cited by 3 publications

(9 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Next, the adsorption behavior will be explained in terms of chromium species present in water [ 4 , 29 , 30 , 31 ]. In the range of pH 1.0–3.0, the equilibrium pH value was almost the same as the initial pH value within ±0.02.…”

Section: Resultsmentioning

confidence: 99%

“…These results suggest that the Cr(VI) ion adsorption more successfully proceeded at higher temperatures. There are some systems in which the adsorption capacity is dependent on the temperature [ 31 ] and other ones where the adsorption capacity is independent of the temperature [ 3 , 4 ]. The effect of temperature on the adsorption behavior could vary depending on the experimental conditions, such as the type of adsorbent, amount and position of adsorption site, Cr(VI) ion concentration, adsorbent shape and so on.…”

Section: Resultsmentioning

confidence: 99%

“…The adsorption capacity and initial adsorption rate increased with the amount of amino groups and then leveled off higher than 0.12 mmol/g. In addition, the adsorption ratio was calculated by dividing the adsorption capacity by the amount of amino groups introduced on the AEAPTES-silica beads [ 3 , 4 ]. As shown in Figure 7 b, the adsorption ratio gradually decreased with an increase in the amount of amino groups.…”

Section: Resultsmentioning

confidence: 99%

“…Aqueous solutions of NaCl at 0.50 M, NH 4 Cl at 0.10 M, and NaOH at 0.50 mM were prepared as an eluent for desorption of Cr(VI) ions [ 4 , 20 ]. The Cr(VI) ion-loaded AEAPTES-silica beads were immersed in the above eluents at 30 °C.…”

Section: Methodsmentioning

confidence: 99%

“…Among these methods, adsorption is viewed as superior to other methods because of its simplicity, ability for regeneration, cost-effectiveness, and enabling large-scale applications. Moreover, the greatest advantage of the adsorption method is that by-products, such as sludge, are not generated [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Kinetic, Isotherm, and Equilibrium Investigation of Cr(VI) Ion Adsorption on Amine-Functionalized Porous Silica Beads

et al. 2022

Self Cite

View full text Add to dashboard Cite

The hexavalent chromium (Cr(VI)) ion adsorption properties were conferred to porous silica beads by introducing alkylamine chains through functionalization with an aminosilane coupling agent, [3-(2-aminoethylamino)propyl]triethoxysilane (AEAPTES), or with an epoxysilane coupling agent, (3-glycidyloxypropyl)triethoxysilane (GOPTES), and polyfunctional amine compounds or poly-ethylenimines (PEIs). The presence of amino groups on the silica beads was confirmed by XPS and the amount of amino groups increased to 0.270 mmol/g by increasing the AEAPTES concentration and/or reaction time. The adsorption capacity of the silica beads functionalized with AEAPTES was the maximum at the initial pH value of 3.0 and the initial adsorption rate increased with an increase in the temperature. The adsorption capacity increased with an increase in the amount of amino groups at pH 3.0 and 30 °C. The adsorption behavior obeyed the pseudo-second order kinetic model and was well expressed by the Langmuir isotherm. These results support that Cr(VI) ion adsorption is accomplished through the electrostatic interaction between protonated amino groups and HCrO4- ions. In addition, the adsorption capacity further increased to 0.192–0.320 mmol/g by treating the GOPTES-treated silica beads with triethylenetetramine, pentaethylenehexamine, or PEI. These empirical, equilibria, and kinetic aspects obtained in this study support that the porous silica-based adsorbents prepared in this study can be applied to the removal of Cr(VI) ions.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Kinetic, Isotherm, and Equilibrium Investigation of Cr(VI) Ion Adsorption on Amine-Functionalized Porous Silica Beads

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Covalent immobilization of benzalkonium bromide on polyethylene by hyperthermal-hydrogen induced-crosslinking

Luo

Liu

et al. 2023

Materials & Design

View full text Add to dashboard Cite

Quaternization of Porous Cellulose Beads and Their Use for Removal of Humic Acid from Aqueous Medium

et al. 2023

View full text Add to dashboard Cite

Porous cellulose beads were quaternized with glycidyltrimethylammonium chloride (GTMAC) to explore a potential use of them as an adsorbent for removal of humic acid (HA) from aqueous medium. The introduction of quaternary ammonium groups was confirmed by FT-IR and XPS analysis. The content of introduced quaternary ammonium groups increased with an increase in the GTMAC concentration. The adsorption capacity increased with a decrease in the initial pH value and attained the maximum value at pH 3 and increased with an increase in the content of quaternary ammonium groups. The removal % increased with the dose of quaternized cellulose beads at both pH 3.0 and 6.0. The adsorption process obeyed the pseudo-second order kinetic model and exhibited a better fit to the Langmuir isotherm model, suggesting that the adsorption of HA is accomplished through the electrostatic interaction between a quaternary ammonium group introduced and a dissociated carboxy group of a HA molecule. The maximum adsorption capacity obtained in this study is comparable to or higher than those published by other articles. HA loaded was completely released to NaOH solutions at higher than 100 mM to regenerate the quaternized cellulose beads. The above-mentioned results clearly show that the quaternized cellulose beads prepared in this study can be used as a regenerable adsorbent with high capacity for removal of HA from aqueous medium.

show abstract

Development of recoverable adsorbents for Cr(VI) ions by grafting of a dimethylamino group-containing monomer on polyethylene substrate and subsequent quaternization

Cited by 3 publications

References 58 publications

Kinetic, Isotherm, and Equilibrium Investigation of Cr(VI) Ion Adsorption on Amine-Functionalized Porous Silica Beads

Kinetic, Isotherm, and Equilibrium Investigation of Cr(VI) Ion Adsorption on Amine-Functionalized Porous Silica Beads

Covalent immobilization of benzalkonium bromide on polyethylene by hyperthermal-hydrogen induced-crosslinking

Quaternization of Porous Cellulose Beads and Their Use for Removal of Humic Acid from Aqueous Medium

Contact Info

Product

Resources

About