Density and Porosity

doi:10.1017/9781108380713.003

Cited by 2 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Brunauer-Emmett-Teller (BET) analysis was carried out at a temperature of 77.4 K using liquid nitrogen, employing the Tristar II 3020 instrument (Micrometric Inc., Tristar II, Shimadzu, Japan). In earlier study, the porosity rate (P%) were calculate by using the equation (Bagdassarov, 2021):…”

Section: Characterization Of Limonite-pes Composite Fibersmentioning

confidence: 99%

Arsenic removal adsorbent using limonite–polyethersulfone composite fiber via continuous flow column process

Le Thi,

Zhe,

Kobayashi

2024

Water Environment Research

View full text Add to dashboard Cite

This research introduces an enhanced limonite‐based composite fiber adsorbent for arsenic (As) removal. The modification involves creating polyethersulfone (PES)–limonite composite fibers loaded with 60 wt% limonite powders, designed to be applicable in water flow environments. The fibers were prepared using a wet‐spinning process based on phase inversion, with varying concentrations (10, 20, and 30 wt%) of PES in NMP solution. The composite fiber with 10 wt% NMP exhibited a porous structure and demonstrated efficient absorption of both As(III) and As(V). Adsorption followed the Langmuir model, with qm values of 1.5 mg/g for As(III) and 3.2 mg/g for As(V) at pH 6. In column experiments, As removal rates increased with contact time, attributed to decreased flow rates (1 mL/min). Moreover, increasing fiber column height led to enhanced removal rates, as indicated by the Adams–Bohart model. The mechanism for As(V) removal involved the formation of an inner‐sphere complex through ion exchange between α‐FeOOH and HAsO4− and H2AsO42− in an aqueous solution at pH 6.8.Practitioner Points Changing the polyethersulfone ratio in the composite leads to variations in the appearance of limonite within each composite fiber. Limonite composite fibers effectively remove As(III) and As(V) at neutral pH. The adsorption behavior follows Langmuir kinetic model, the qm of 1.5 mg/g for As(III) and 3.2 mg/g for As(V). Longer columns and contact times enhance arsenic (As) removal in practical water treatment systems. Adam–Bohart model aids in predicting breakthrough and saturation time in As adsorption column design.

show abstract

Section: Characterization Of Limonite-pes Composite Fibersmentioning

confidence: 99%

Arsenic removal adsorbent using limonite–polyethersulfone composite fiber via continuous flow column process

Le Thi,

Zhe,

Kobayashi

2024

Water Environment Research

View full text Add to dashboard Cite

show abstract

An innovative nano-porous copper composite without using a pore-forming agent

Yehia,

Elkady,

El-Geassy

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

View full text Add to dashboard Cite

In this research, a new nano-open porous copper without using a pore-forming agent was innovated. Five copper samples which are pure copper, Cu/2.5%Al2O3, Cu/2.5(Al2O3-GNs)Ag, Cu/5(Al2O3-GNs)2.5Ag, and Cu/7.5(Al2O3-GNs)2.5Ag were prepared using the electroless coating process. The samples were characterized by studying their chemical composition, microstructure, total pore area, bulk density, apparent density, and porosity percent. Also, the hardness and corrosion rate were studied. The SEM emphasized the formation of open pores with homogeneous distribution. Agglomeration of the new hybrid (Al2O3/GNs) was observed at 7.5%. The porosity percent and total pore area were increased gradually by adding 2.5%Al2O3 and different ratios of the new hybrid. The 7.5% (Al2O3-GNs) sample recorded the highest porosity percentage 32.86%. The sample 7.5% (Al2O3-GNs) exhibits the highest incremental pore volume in the micro-pore regions. The 5% (Al2O3-GNs) sample recorded the highest cumulative pore volume in the nanopore diameter region. The hybrid reinforcement (Al2O3/GNs) achieved hardness better than the single reinforcement (Al2O3). The hardness decreased gradually due to increasing the porosity percent and forming some agglomerations of the (Al2O3/GNs)Ag at 7.5%. The Cu/2.5(Al2O3/GNs)Ag sample recorded the lowest corrosion rate of 3.31 mm/year.

show abstract

Density and Porosity

Cited by 2 publications

References 18 publications

Arsenic removal adsorbent using limonite–polyethersulfone composite fiber via continuous flow column process

Arsenic removal adsorbent using limonite–polyethersulfone composite fiber via continuous flow column process

An innovative nano-porous copper composite without using a pore-forming agent

Contact Info

Product

Resources

About