Effect of modification of environmentally friendly biosorbent wheat (Triticum aestivum) on the biosorptive removal of cadmium(II) ions from aqueous solution

Farooq, Umar; Khan, Misbahul Ain; Athar, Makshoof; Koziński, Janusz A.

doi:10.1016/j.cej.2011.03.094

Cited by 168 publications

(63 citation statements)

References 59 publications

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“…Figure 4 shows that the highest rate of metal removal was achieved at pH 5.0. A smaller degree of removal at pH levels of 6.0 and 7.0 can be explained by the fact that the mobility of some elements may be reduced, which can lead to precipitation of insoluble forms 26 at pH values close to neutral. When low pH values are present, H + and Cr 3+ ions compete for the active sites of adsorption.…”

Section: Ph Dependency and Adsorbent Massmentioning

confidence: 99%

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Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

et al. 2013

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Recebido em 14/11/12; aceito em 13/5/13; publicado na web em 17/7/13 This study evaluated the adsorption capacity of chromium from contaminated aqueous solutions by using Moringa oleifera Lam. seeds. Parameters such as solution pH, adsorbent mass, contact time between solution and adsorbent, isotherms, thermodynamic, kinetics, and desorption were evaluated. The maximum adsorption capacity (Q m ) calculated to be 3.191 mg g −1 for the biosorbent. Activated carbon was used for comparison purposes in addition to the biosorbent. The best fit was obtained by the Langmuir model for both adsorbents. The average desorption value indicated that both the biosorbent and activated carbon have a strong interaction with the metal. The results showed that the biosorbent has advantages owing to its low cost and efficiency in Cr 3+ removal from contaminated waters.

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Section: Ph Dependency and Adsorbent Massmentioning

confidence: 99%

“…Farooq 26 demonstrated that a decrease in ΔG values with increasing temperature results in an increase in process spontaneity.…”

Section: Thermodynamic Parametersmentioning

confidence: 99%

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Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

et al. 2013

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“…It helps to study the biosorption mechanism and is required to obtain an insight of the rate of the biosorption. With the help of kinetics data, the rate determining step of the transport mechanism and thus the modelling and the design of the process can be described (Farooq et al, 2011). The effect of contact time on the adsorption of Ni(II) on EGP, SWP and BNP in batch mode is as shown in Figure 7.…”

Section: Batch Experimentsmentioning

confidence: 99%

Screening of agricultural waste for Ni(II) adsorption: Kinetics, equilibrium and thermodynamic studies

Kakalanga¹

2012

Int. J. Phys. Sci.

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This study reports the adsorption of Ni(II) ions onto waste powders prepared from egg plant (EGP), sweet potato (SWP) and banana peels (BNP). The influence of adsorption parameters, such as pH, contact time, adsorbent weight, adsorbate concentration and temperature were investigated. Equilibrium was described by the Langmuir and Freundlich models. Ni(II) uptake was very fast reaching a maximum within 20 min of adsorbent contact with metal solution. Comparison of removal capacities for EGP, SWP and BNP indicated that EGP was more effective in removing Ni(II) from aqueous solution. The kinetic data fitted the pseudo second order model. Thermodynamic parameters ΔH and ΔS were negative which suggest that adsorption process was spontaneous. The results of Fourier transform infrared (FTIR) indicated several binding and chelating ions, such as carboxyl, carbonyl and hydroxyl groups on the biomaterials surfaces were responsible for Ni(II) adsorption.

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“…In this study the obtained results were fitted into the isotherms of Langmuir, 29 Freundlich, 30 Temkin 31 and Dubinin-Raduskevich 32,33 and the kinetic experimental data were analyzed by comparative estimation of the applicability of the pseudo-first-order model, 34 pseudosecond-order model, 35 Elovich kinetic model 36 and the intraparticle diffusion model 37 (Table 1). …”

Section: Adsorption Kinetic Studiesmentioning

confidence: 99%

Cu(II) ions removal from aqueous solution by synthesized Phragmites australis/emeraldine base biocomposite

Lavrova¹,

Velichkova²,

Koumanova³

2017

ECB

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The influence of in situ synthesized biocomposite consisted of Phragmites australis (Pha) -common reed and emeraldine base (Emb) on the removal of copper ion from aqueous media is discussed. The biocomposites were prepared with two different ratios of common reed/aniline (samples Pha/Emb1 and Pha/Emb2, respectively. Physicochemical parameters such as initial copper ion concentration, composite dosage and contact time between the composites and Cu(II) ions in aqueous solution were studied. An assessment of the equilibrium and the kinetics of sorption of copper ions has been made. Removal efficiency of 99.6 % was achieved with Pha/Emb1 and 91.9 % with Pha/Emb2, respectively. The experimental results were fitted to the isotherms of Langmuir, Freundlich, Temkin and DubininRadushkevich. It was established that the Langmuir isotherm is more suitable for the case of emeraldine base and for composite Pha/Emb1, while the Dubinin-Radushkevich isotherm is more suitable for the case of Pha/Emb2 (with higher content of common reed). The influence of the plant quantity in the biocomposite is important for the mechanism of Cu 2+ removal. Physical adsorption and ion exchange are dominant in the case of Pha/Emb1, and Emb, while in the case of Pha/Emb2 the chemical interaction is predominant. The kinetics of Cu(II) adsorption onto biocomposites followed pseudo-second-order model. IntroductionThe industrial wastewaters in most cases contain metal ions which can be removed by chemical or physicochemical processes. Because of their hazard impact on the environment and the high cost of the used methods, it needs to develop new, cost-effective and efficient methods for industrial wastewater treatment. The most widely used methods for metal ions removal from aqueous medium is precipitation, adsorption and ion exchange, because of their effectiveness, low cost and possibility of metal recovery.Increasing attention to the biosorbents such as rice hulls, raw pomegranate peel, peanut shells, sphagnum moss peat, tree fern, as well as dried activated sludge, is paid because they are widely spread, not expensive raw materials.1-6 Also, there are various polymeric substances which can capture various ions, as a result of the complexation reactions. Such materials are chitosan, 7,8 polythioamide, 9 polypyrrole, 10 polyaniline, 11 etc. These polymers can be used either separately or as composites -the combination of different polymers 12,13,15 or combination of the polymer with some adsorbents. [14][15][16] One of the widely used polymeric substance is polyaniline, which conductive properties and complexing ability are well-known. The polyaniline can be found in one of three idealized oxidation states -leucoemeraldine, emeraldine, and (per)nigraniline. The emeraldine form of polyaniline exists as emeraldine salt and emeraldine base. The deprotonated nonconducting emeraldine base has more free electron pairs in its structure in comparison with protonated conducting emeraldine salt, which contribute to its better complexation ability. 17-19The co...

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Effect of modification of environmentally friendly biosorbent wheat (Triticum aestivum) on the biosorptive removal of cadmium(II) ions from aqueous solution

Cited by 168 publications

References 59 publications

Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

Biosorption and removal of chromium from water by using moringa seed cake (Moringa oleifera Lam.)

Screening of agricultural waste for Ni(II) adsorption: Kinetics, equilibrium and thermodynamic studies

Cu(II) ions removal from aqueous solution by synthesized Phragmites australis/emeraldine base biocomposite

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