Effect of pore size on the performance of composite adsorbent

Bu, Xianbiao; Wang, Lingbao; Huang, Yuanfeng

doi:10.1007/s10450-013-9513-8

Cited by 35 publications

(7 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The size of pores and the gap between fragments were about 2-10 um. The structure of EP was macropore (＞50 nm) [19], which played a positive role in removing MB from aqueous solution that allowing MB molecules to quickly enter internal holes [20]. Thus, EP showed a good absorption properties, consistent with the experimental results.…”

Section: Characterization Of Three Adsorbentssupporting

confidence: 81%

Removal Of Methylene Blue From Aqueous Solution Using Expanded Perlite

Zhao¹,

Li³

et al. 2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

View full text Add to dashboard Cite

The adsorbent of expanded perlite (EP) was investigated to determine the removal effect on methylene blue (MB) from wastewater through static adsorption. The factors, such as adsorbent dosage, shaking time, temperature, and pH, were investigated. The optimum dosage, shaking time, temperature, and pH was 0.80 g, 100 min, 20 ℃, and 5.67, respectively. Isotherm analysis showed that the patterns of MB adsorption onto expanded perlite was not in line with two adsorption isotherm models, namely, Langmuir and Freundlich. The kinetic characteristics of adsorption were also evaluated. The adsorption process of the MB onto EP was in accordance with the pseudo second-order rate equation. Under ideal experimental parameters, the MB removal efficiency was 94.12% for EP, which indicated that EP is a potential adsorbent for the treatment of MB wastewater.

show abstract

Section: Characterization Of Three Adsorbentssupporting

confidence: 81%

Removal Of Methylene Blue From Aqueous Solution Using Expanded Perlite

Zhao¹,

Li³

et al. 2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

View full text Add to dashboard Cite

show abstract

“…It was expected that the DCNC introduced into the system would help the hydrogel to form a more porous structure, as confirmed by the increase of the samples’ pore volume, thereby contributing to an increase in the total surface area. It is worth mentioning that the mean pore size decreased with the DCNC component increase, which is probably attributable to partial pore blockage caused by the DCNC [ 30 ]. Thus, though incorporating DCNC into hydrogel can increase the number of active sites and surface area for adsorption, too much DCNC could block the tiny internal pores and hinder mass transfer.…”

Section: Resultsmentioning

confidence: 99%

Sodium Alginate–Aldehyde Cellulose Nanocrystal Composite Hydrogel for Doxycycline and Other Tetracycline Removal

et al. 2023

View full text Add to dashboard Cite

A novel composite hydrogel bead composed of sodium alginate (SA) and aldehyde cellulose nanocrystal (DCNC) was developed for antibiotic remediation through a one-step cross-linking process in a calcium chloride bath. Structural and physical properties of the hydrogel bead, with varying composition ratios, were analyzed using techniques such as BET analysis, SEM imaging, tensile testing, and rheology measurement. The optimal composition ratio was found to be 40% (SA) and 60% (DCNC) by weight. The performance of the SA–DCNC hydrogel bead for antibiotic remediation was evaluated using doxycycline (DOXY) and three other tetracyclines in both single- and multidrug systems, yielding a maximum adsorption capacity of 421.5 mg g−1 at pH 7 and 649.9 mg g−1 at pH 11 for DOXY. The adsorption mechanisms were investigated through adsorption studies focusing on the effects of contact time, pH, concentration, and competitive contaminants, along with X-ray photoelectron spectroscopy analysis of samples. The adsorption of DOXY was confirmed to be the synergetic effects of chemical reaction, electrostatic interaction, hydrogen bonding, and pore diffusion/surface deposition. The SA–DCNC composite hydrogel demonstrated high reusability, with more than 80% of its adsorption efficiency remaining after five cycles of the adsorption–desorption test. The SA–DCNC composite hydrogel bead could be a promising biomaterial for future antibiotic remediation applications in both pilot and industrial scales because of its high adsorption efficiency and ease of recycling.

show abstract

“…68 The sorption capacity and sorption rate have been found to depend on the type and amount of the loaded hygroscopic salts, the water affinity, size, distribution, and the volume of the pores within the porous sorbents, as well as the manufacturing methods. [69][70][71][72] 2.2.4 Materials' properties for sorption. Based on the moisture/sorbent interaction mechanisms discussed above, the material properties to be considered when selecting or designing sorbents for AWH can be summarised as follows: (1) material affinity towards water vapor, which affects the sorption capacity and is also strongly related to the lowest relative humidity where sorbents can work; (2) specic surface area, which signies the number of sorption sites available on sorbents; (3) pore features including pore size, distribution, and volume, which dictate the types of sorption/desorption isotherms, speed of mass exchange, and also the sorption capacity; and (4) thermal conductivity which facilitates heat exchange and the corresponding sorption/desorption.…”

Section: Mechanisms Underlying Moisture/sorbent Interactionsmentioning

confidence: 99%