Effect of pore size distribution and particle size of porous metal oxides on phosphate adsorption capacity and kinetics

Kumar, Prashanth Suresh; Korving, Leon; Keesman, Karel J.; Loosdrecht, Mark C.M. van; Witkamp, Geert‐Jan

doi:10.1016/j.cej.2018.09.202

Cited by 223 publications

(55 citation statements)

References 54 publications

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“…In surface characteristics, porosity is essential to investigate the adsorption potential of MO particles in antimicrobial actions [34]. Large mesopores (10-50 nm) in MO particles induce fast biochemical adsorption on the particle surfaces, which has contributed to enhanced reaction rate, compared to small mesopores (2-10 nm).…”

Section: Discussionmentioning

confidence: 99%

Multiscale Metal Oxide Particles to Enhance Photocatalytic Antimicrobial Activity against Escherichia coli and M13 Bacteriophage under Dual Ultraviolet Irradiation

Jin

2021

Pharmaceutics

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Antimicrobial activity of multiscale metal oxide (MO) particles against Escherichia coli (E. coli) and M13 bacteriophage (phage) was investigated under dual ultraviolet (UV) irradiation. Zinc oxide (ZnO), magnesium oxide (MgO), cuprous oxide (Cu2O), and cupric oxide (CuO) were selected as photocatalytic antimicrobials in MO particles. Physicochemical properties including morphology, particle size/particle size distribution, atomic composition, crystallinity, and porosity were evaluated. Under UV-A and UV-C irradiation with differential UV-C intensities, the antimicrobial activity of MO particles was monitored in E. coli and phage. MO particles had nano-, micro- and nano- to microscale sizes with irregular shapes, composed of atoms as ratios of chemical formulae and presented crystallinity as pure materials. They had wide-range specific surface area levels of 0.40–46.34 m2/g. MO particles themselves showed antibacterial activity against E. coli, which was the highest among the ZnO particles. However, no viral inactivation by MO particles occurred in phage. Under dual UV irradiation, multiscale ZnO and CuO particles had superior antimicrobial activities against E. coli and phage, as mixtures of nano- and microparticles for enhanced photocatalytic antimicrobials. The results showed that the dual UV-multiscale MO particle hybrids exhibit enhanced antibiotic potentials. It can also be applied as a next-generation antibiotic tool in industrial and clinical fields.

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Section: Discussionmentioning

confidence: 99%

Multiscale Metal Oxide Particles to Enhance Photocatalytic Antimicrobial Activity against Escherichia coli and M13 Bacteriophage under Dual Ultraviolet Irradiation

Jin

2021

Pharmaceutics

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“…For adsorption, the chemical costs were calculated for porous metal oxide assuming that it is reused successfully for 30 cycles. Even if the equilibrium adsorption capacity for this adsorbent (FSP) at 1 mg P/L is considered as the practical loading value (Suresh Kumar et al., 2019), the cost to reduce phosphate concentrations from 10 to 1 mg P/L is around $ 35/Kg P. However, as the phosphate concentration goes lower, the costs for adsorption compete and eventually better those of precipitation (see Fig. 9 (b)).…”

Section: Economic Analysis For Phosphate Adsorptionmentioning

confidence: 99%

“…On the other hand, 96% of phosphate removal was achieved within 30 min in a macroporous (pore size > 50 nm) adsorbent (Yang et al., 2012). In a study comparing phosphate adsorption onto different porous metal oxides, it was determined that pores bigger than 10 nm are required to enhance phosphate adsorption kinetics (Suresh Kumar et al., 2019). This shows the need to characterize the pore structure of the adsorbents along with their surface area to ensure good phosphate adsorption kinetics.…”

Section: Introductionmentioning

confidence: 99%

Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Korving²,

et al. 2019

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Eutrophication and the resulting formation of harmful algal blooms (HAB) causes huge economic and environmental damages. Phosphorus (P) from sewage effluent and agricultural run-off has been identified as a major cause for eutrophication. Phosphorous concentrations greater than 100 μg P/L are usually considered high enough to cause eutrophication. The strictest regulations however aim to restrict the concentration below 10 μg P/L. Orthophosphate (or phosphate) is the bioavailable form of phosphorus. Adsorption is often suggested as technology to reduce phosphate to concentrations less than 100 and even 10 μg P/L with the advantages of a low-footprint, minimal waste generation and the option to recover the phosphate. Although many studies report on phosphate adsorption, there is insufficient information regarding parameters that are necessary to evaluate its application on a large scale. This review discusses the main parameters that affect the economics of phosphate adsorption and highlights the research gaps. A scenario and sensitivity analysis shows the importance of adsorbent regeneration and reuse. The cost of phosphate adsorption using reusable porous metal oxide is in the range of $ 100 to 200/Kg P for reducing the phosphate to ultra-low concentrations. Future research needs to focus on adsorption capacity at low phosphate concentrations, regeneration and reuse of both the adsorbent and the regeneration liquid.

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“…The characterization and the effect of the particle size toward the physicochemical properties of the zeolite adsorptivity on the ammonia were studied in detail. The common analysis of the particle size in adsorption activities is normally reported in the powder suspension form of adsorbent [29,31]. The analysis of particle size effect incorporating with the membrane configuration is the novelty of this current work.…”

Section: Natural Zeolite Hfcm Fabrication and Characterisationmentioning

confidence: 99%

“…Particle size significantly affects membrane properties in terms of mechanical strength, porosity, and water permeability [28]. In addition, a small particle size offers a high surface area, resulting in a large number of active sites [29]. This property eventually increases the adsorptivity of the membrane in ammonia removal.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Natural Zeolite Particle Size Toward the Ammonia Adsorption Activity in Ceramic Hollow Fiber Membrane

et al. 2020

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Natural zeolite is widely used in removing ammonia via adsorption process because of its superior ion-exchange properties. Ceramic particle size affects the adsorptivity of particles toward ammonia. In this study, hollow fiber ceramic membrane (HFCM) was fabricated from natural zeolite via phase inversion. The effect of natural zeolite particle size toward the properties and performance of HFCM was evaluated. The results show that the HFCM with smaller particle sizes exhibited a more compact morphological structure with better mechanical strength. The adsorption performance of HFCM was significantly improved with smaller particle sizes because of longer residence time, as proven by the lower water permeability. A high adsorption performance of 96.67% was achieved for HFCM with the smallest particle size (36 μm). These findings provide a new perspective on the promising properties of the natural zeolite-derived HFCM for ammonia removal.

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Effect of pore size distribution and particle size of porous metal oxides on phosphate adsorption capacity and kinetics

Cited by 223 publications

References 54 publications

Multiscale Metal Oxide Particles to Enhance Photocatalytic Antimicrobial Activity against Escherichia coli and M13 Bacteriophage under Dual Ultraviolet Irradiation

Multiscale Metal Oxide Particles to Enhance Photocatalytic Antimicrobial Activity against Escherichia coli and M13 Bacteriophage under Dual Ultraviolet Irradiation

Adsorption as a technology to achieve ultra-low concentrations of phosphate: Research gaps and economic analysis

Influence of the Natural Zeolite Particle Size Toward the Ammonia Adsorption Activity in Ceramic Hollow Fiber Membrane

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