Overview on the Effect of Particle Size on the Performance of Wood Based Adsorbent

Pn, Ikenyiri; Cp, Ukpaka

doi:10.4172/2157-7048.1000315

Cited by 13 publications

(6 citation statements)

References 11 publications

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“…This outcome could be attributed to the lower microporosity and surface area generally observed for coarser media [40]. Similar behavior was observed by PN and CP [41] when investigating an oily effluent treatment by hard wood based adsorbents. They reported a decrease of the removal efficiency by about 30% when the average size particles were increased from 0.8 to 3.5 mm.…”

Section: Effect Of Lignite Granulometrysupporting

confidence: 71%

Use of Lignite as a Low-Cost Material for Cadmium and Copper Removal from Aqueous Solutions: Assessment of Adsorption Characteristics and Exploration of Involved Mechanisms

Jellali

Azzaz

Jeguirim

et al. 2021

Water

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Lignite, as an available and low-cost material, was tested for cadmium (Cd) and copper (Cu) removal from aqueous solutions under various static experimental conditions. Experimental results showed that the removal efficiency of both metals was improved by increasing their initial concentrations, adsorbent dosage and aqueous pH values. The adsorption kinetic was very rapid for Cd since about 78% of the totally adsorbed amounts were removed after a contact time of only 1 min. For Cd and Cu, the kinetic and isothermal data were well fitted with pseudo-second order and Freundlich models, respectively, which suggests that Cd/Cu removal by lignite occurs heterogeneously on multilayers surfaces. The maximum Langmuir’s adsorption capacities of Cd and Cu were assessed to 38.0 and 21.4 mg g−1 and are relatively important compared to some other lignites and raw natural materials. Results of proximate, scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDS), Fourier transform infrared spectroscopy (FTIR) and X-Ray diffraction (XRD) showed that the removal of these metals occurs most likely through a combination of cation exchange and complexation with specific functional groups. The relatively high adsorption capacity of the used lignite promotes its future use as a low cost material for Cd and Cu removal from effluents, and possibly for other heavy metals or groups of pollutants.

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Section: Effect Of Lignite Granulometrysupporting

confidence: 71%

Use of Lignite as a Low-Cost Material for Cadmium and Copper Removal from Aqueous Solutions: Assessment of Adsorption Characteristics and Exploration of Involved Mechanisms

Jellali

Azzaz

Jeguirim

et al. 2021

Water

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“…Particle size of a sorbent is an important controlling parameter in the sorption process because availability of surface area for sorption is greatly influenced by particle size of the sorbent. It can be deduced from the plots shown in Figure 12 that both RL and CL displayed higher CR dye removal efficiencies with particle size of <125 μ m than >125 μ m. This could be attributed to the fact that pulverisation of the sorbents to fine particulate powder provides larger surface area, thereby increasing rate of sorption [75]. This observation is consistent with studies conducted on the sorption of CR dye using biowastes [44, 76].…”

Section: Resultssupporting

confidence: 83%

Sequestration of Hazardous Dyes from Aqueous Solution Using Raw and Modified Agricultural Waste

Jegede

Durowoju

Edokpayi

2021

Adsorption Science & Technology

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The continuous degradation of surface water quality by dye materials is of concern globally. Agricultural waste Litchi chinensis (LC) peel in its raw (RL) and modified (CL) forms was used as potential sorbents for sequestration of Congo red (CR) dye from an aqueous solution. The sorbents were characterized before and after sorption with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Brunauer, Emmett, and Teller (BET) surface area analysis, and X-ray diffraction (XRD). Determination of the point of zero charge (PZC) suggested CR dye sorption from an aqueous solution would be best in acidic pH. Batch experimental drivers such as the effects of time, dosage, initial concentration, pH, and temperature were optimized and used. Results from the study showed that modification with citric acid (CA) reduced the equilibration time from 90 to 15 min. Change in water chemistry did not significantly affect the removal efficiency of the sorbent but rather slightly improved it for both sorbent types. The smaller particle size of <125 μm recorded higher removal efficiency than the larger one (>125 μm). The effect of temperature affects the sorption differently. For the RL system, it decreases with an increase in the temperature, while for the CL system it increases with an increase in temperature. The Langmuir isotherm best described the equilibrium data obtained based on the linearized coefficients with maximum sorption capacities ( q max ) of 55.56 mg/g (RL) and 58.48 mg/g (CL). The pseudo-second-order model also best described the kinetic data. The thermodynamics study showed that the reaction is both feasible and spontaneous. Both sorbents recorded high removal efficiency for other dyes such as rhodamine B, methylene blue, methyl orange, malachite green, and erythrosin B. The five cycled regeneration/sorption experiments with 0.1 M NaOH as the desorbing agent showed that the regenerated sorbents efficiently removed CR dye from an aqueous solution close to their virgin samples for the first three cycles. This research, therefore, establishes LC peel as a potential eco-friendly, readily available, and effective sorbent for sequestration of hazardous dyes from wastewater.

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“…In conclusion, LPEI-silica contained amounts of oil sorption approximately 10-20 times higher than unmodified silica depending on the size of silica particle and the type of oil. This is in conformity with the other reports that state that the oil sorption efficiency is affected by the size of the particles (Ikenyiri & Ukpaka 2016). The increase of oil sorption can be attributed to the higher surface area values of the modified small-silica particles resulting in better covering on the oil droplet, which leads to the higher efficiency for oil removal.…”

Section: Investigation Of the Sorption Of Oil On The Modified Silica Particlessupporting

confidence: 92%

Removing free-floating oil from water using cationic polymers/surfactant-modified silica

Ruksanti

Janhom

2021

Journal of Water Reuse and Desalination

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The purpose of this work was to evaluate the efficiency of oil sorption of silica particles modified by three different types of cationic polymers and a cationic surfactant. Low-molecular-weight polyethyleneimine (LPEI), high-molecular-weight polyethyleneimine (HPEI), polydiallyldimethylammonium chloride (PDM), and cetyltrimethylammonium bromide (CTAB) were used to modify the silica particles and then compared their performances for oil removal. The scanning electron microscope and zeta potential measurements were used to analyze the surface characteristics of unmodified and modified silica particles. Adsorptions of motor oil and palm oil on the modified silica particles have been investigated under various parameters such as the silica particle size, the oil concentration, the polymer/surfactant concentrations, and the pH. The results have shown that the modified silica particles enhanced the oil sorption ability by approximately 10–20 times depending on the size of silica particles, pH, and the type of polymer/surfactant used when compared with the unmodified silica particles. The highest palm oil adsorption values of LPEI-silica, HPEI-silica, PDM-silica, CTAB-silica, and unmodified silica were 2.40, 2.10, 1.95, 1.50, and 0.15 g/gsilica, respectively. Moreover, the oil sorption of the modified silica particles was increased by approximately 30–50% for the smallest-sized silica particles.

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Overview on the Effect of Particle Size on the Performance of Wood Based Adsorbent

Cited by 13 publications

References 11 publications

Use of Lignite as a Low-Cost Material for Cadmium and Copper Removal from Aqueous Solutions: Assessment of Adsorption Characteristics and Exploration of Involved Mechanisms

Use of Lignite as a Low-Cost Material for Cadmium and Copper Removal from Aqueous Solutions: Assessment of Adsorption Characteristics and Exploration of Involved Mechanisms

Sequestration of Hazardous Dyes from Aqueous Solution Using Raw and Modified Agricultural Waste

Removing free-floating oil from water using cationic polymers/surfactant-modified silica

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