Removal of Lead and Copper Ions from Polluted Aqueous Solutions using Nano-Sawdust Particles

A, Fathy El Saied; A, Saeyda Abo Elenan; H, Fathia El shinawy

doi:10.4172/2252-5211.1000305

Cited by 6 publications

(6 citation statements)

References 34 publications

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“…Chemisorption occurs when heavy metals make a chemical (typically covalent) link with the adsorbent surface and seek out areas with the highest coordination number. Chemisorption is normally limited to just one sheet (monolayer) of particles on the adsorbent's surface, while additional layers of physically adsorbed molecules may be added afterwards [34]. PSO is based on the assumption that the rate determining step is chemisorption [35], [36], this implies that the process here is chemisorption.…”

Section: Kinetic Studiesmentioning

confidence: 99%

“…From the R 2 values of the graphs, experimental outcome better fits the Langmuir model for all except Pb (12:1 in figure 16), more than Freundlich model. The Langmuir isotherm describes a saturated monolayer (chemisorption) adsorption of an adsorbate on a homogeneous leveled plane of an adsorbent; in addition individual adsorptive location can just be occupied once in a one-on-one manner [34], [37], [38], [29]. The linear form of the Langmuir equation is as in equation 4Ce/Qe=1/KlQm+Ce/qm (4)…”

Section: Adsorption Isotherms Determinationmentioning

confidence: 99%

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Utilizing Composites of Environmental Noxious Waste Materials for Decontamination of Heavy Metal Ions in Solution

2023

compne

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Heavy metals, sawdust and waste plastic bottles are pollutants which are threats to the environment and by extension to humans, animals and plants. Composites of waste plastic bottles and sawdust in different ratios (3:1, 6:1 and 12:1) were used to adsorb iron (III) and lead (II) from aqueous solution. Batch adsorption was used to determine the kinetics and equilibrium of the adsorption. Atomic absorption spectrometry (AAS) was used to determine the concentrations of the metals in pre and post adsorption. FTIR was used to characterize the composite adsorbents; the results showed peaks for OH (3291.2, 3336.0, 3406.8 and 3652.8cm -1 ) and CO (1714.6cm -1 ) which influence adsorption. Pseudo second order (PSO) and Weber-Morris intraparticle diffusion models were studied and experimental data largely favoured pseudo second order kinetic model; while intraparticle diffusion was dominant for the 12:1 ratio for Pb as shown by the higher R 2 value (0.921).For equilibrium studies, experimental data fitted Langmuir more than the Freundlich. Percentage adsorption of more than 90% was achieved for both metals at initial concentrations as high as 50ppm for iron and 100ppm for lead. It was also observed that the percentage adsorption of lead was more than that of iron. The results of the equilibrium and kinetic studies showed that the different ratios of waste PET plastic bottles to sawdust are potential adsorbents for iron and lead from aqueous phase.

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Section: Kinetic Studiesmentioning

confidence: 99%

Section: Adsorption Isotherms Determinationmentioning

confidence: 99%

Utilizing Composites of Environmental Noxious Waste Materials for Decontamination of Heavy Metal Ions in Solution

2023

compne

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“…The higher the concentration of the copper in the solution, the less able the sawdust is to eliminate it from the solution. At higher concentrations of pollutants, the fractional adsorption is low [72]. To determine the adsorption capacity of natural and modified sawdust, sorption experiments were performed with different initial concentrations (10,30,50,70,90,110,130, and 150 mg/L) of copper ions at the initial value of pH = 4.0.…”

Section: Removal Efficiencymentioning

confidence: 99%

Influence of Wooden Sawdust Treatments on Cu(II) and Zn(II) Removal from Water

et al. 2020

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Organic waste materials and semi-products containing cellulose are used as low-cost adsorbents that are able to compete with conventional sorbents. In addition, their capacity to bind heavy metal ions can be intensified by chemical treatments using mineral and organic acids, bases, oxidizing agents, and organic compounds. In this paper, we studied the biosorption capacity of natural and modified wooden sawdust of poplar, cherry, spruce, and hornbeam in order to remove heavy metals from acidic model solutions. The Fourier transform infrared spectroscopy (FTIR) spectra showed changes of the functional groups due to the alkaline modification of sawdust, which manifested in the considerably increased intensity of the hydroxyl peaks. The adsorption isotherm models clearly indicated that the adsorptive behavior of metal ions in treated sawdust satisfied not only the Langmuir model, but also the Freundlich model. The adsorption data obtained for studied sorbents were better fitted by the Langmuir isotherm model for both metals, except for spruce sawdust. Surface complexation and ion exchange are the major mechanisms involved in metal ion removal. We investigated the efficiency of the alkaline modified sawdust for metal removal under various initial concentrations of Cu(II) and Zn(II) from model solutions. The highest adsorption efficiency values (copper 94.3% at pH 6.8 and zinc 98.2% at pH 7.3) were obtained for poplar modified by KOH. For all types of sawdust, we found that the sorption efficiency of modified sorbents was higher in comparison to untreated sawdust. The value of the pH initially increased more in the case of modified sawdust (8.2 for zinc removal with spruce NaOH) and then slowly decreased (7.0 for Zn(II) with spruce NaOH).

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“…The FTIR method was used to determine active sites existing in the surface structure of the sawdust [8]. The IR spectrum of spruce sawdust is shown in Figure 1.…”

Section: Infrared Sprectramentioning

confidence: 99%

“…In recent years, low cost adsorbents showing potential as efficient wastewater treatment materials have been reported, including aquatic plants, discarded tea leaves, bark, peat moss, lignin, and sawdust. Sawdust is an agricultural waste material that is available in large quantities, has a low cost, and is easily regenerated after use [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Removal of Copper from Water Solutions by Adsorption on Spruce Sawdust

Kovacova

Demcak

Bálintová

2019

Innovations-Sustainability-Modernity-Openness Conference (ISMO’19)

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Pollution of water by toxic elements is one of the major factors of concern for human health, as well as for environmental quality, and draws a large amount of scientific attention. New and cheaper methods of wastewater treatment are increasing the quality of the environment and reducing the negative impacts on fauna, flora, and human beings. The sorption technique is considered a cost effective method for effectively removing heavy metals. During the past few years, there have been increasing studies dedicated to using low-cost adsorbents like bark, tannin-rich materials, lignin, chitosan peat moss, and sawdust. The presented paper describes the adsorption behavior of spruce wood sawdust. In order to determine its applicability for wastewater treatment, copper removal from model solutions was studied.

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Removal of Lead and Copper Ions from Polluted Aqueous Solutions using Nano-Sawdust Particles

Abstract: In te rnation a l J o u rn al of W a s te R es ourc e s

Cited by 6 publications

References 34 publications

Utilizing Composites of Environmental Noxious Waste Materials for Decontamination of Heavy Metal Ions in Solution

Utilizing Composites of Environmental Noxious Waste Materials for Decontamination of Heavy Metal Ions in Solution

Influence of Wooden Sawdust Treatments on Cu(II) and Zn(II) Removal from Water

Removal of Copper from Water Solutions by Adsorption on Spruce Sawdust

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