Removal of copper and cadmium from the aqueous solutions by activated carbon derived from Ceiba pentandra hulls

Rao, M. Madhava; Ramesh, A.; Rao, G. Purna Chandra; Seshaiah, K.

doi:10.1016/j.jhazmat.2005.08.018

Cited by 342 publications

(55 citation statements)

References 22 publications

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“…The use of agriculture byproducts such as coconut fruit (Anirudhan and Sreekumari 2011), nuts apricot (Tsibranska and Hristova 2010), beet pulp (Pehlivan et al 2008), stems of tea (Amarasinghe and Williams 2007), rice husk (Bakircioglu et al 2003;Wong et al 2003), pentandra hulls (Madhava-Raoa et al 2006)and olive stones-waste (Alslaibi et al 2015;Baccar et al 2009;Gharib and Ouederni 2005), which are inexpensive, abundantly available, and renewable materials, as precursor for activated carbon production, reduces adsorption processing costs (Bailey et al 1999). The adsorption process offers flexibility in design and operation and in many cases will produce high-quality treated effluent (Fu and Wang 2011;Cui et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Simultaneous adsorption behavior of heavy metals onto microporous olive stones activated carbon: analysis of metal interactions

Bohli

Ouederni

Villaescusa

2017

Euro-Mediterr J Environ Integr

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The present work reports the synergistic and inhibitory adsorption effects involved in the multicomponent adsorption of heavy metal ions (Cu(II), Ni(II), and Cd(II)) from binary systems using chemically olive stone activated carbon (COSAC) as adsorbent. In order to evaluate the adsorption capacity of COSAC to remove studied heavy metals, adsorption of metal ions in single and binary systems were conducted. Kinetics adsorption rates in binary systems are very fast as compared to that in single ones and well represented by the pseudo second-order. Langmuir and Sips model fit mono-solute adsorption isotherms and the maximum adsorption capacity of COSAC decreased in the following order: Cd(II) [ Ni(II) [ Cu(II). In binary equilibrium systems, the effect of initial concentration of interfering metal ions on the removal of target ones was studied. Different mutual interactions between metal ions dealing with the decrease and the enhancement of inhibitory and synergetic effects were detected. Results showed that the effects on the adsorption of the metal ions in binary mixture strongly depend on the initial concentration of both metal ions in the solution. In most of the scenarios studied, the total amount of metal ions adsorbed was higher than the sum of the ones obtained in single solutions, suggesting synergetic interactions between the two metal ions. This study proves that COSAC is an effective adsorbent for the removal of heavy metals from multicomponent solutions.

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Section: Introductionmentioning

confidence: 99%

Simultaneous adsorption behavior of heavy metals onto microporous olive stones activated carbon: analysis of metal interactions

Bohli

Ouederni

Villaescusa

2017

Euro-Mediterr J Environ Integr

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“…Cation exchange capacity (CEC) was measured by initial saturation of samples with 1M KCl solution. The K + saturated samples were washed with 1M NH 4 Cl solution in order to remove the exchangeable K + ions. The amount of K + in the supernatant was measured using atomic absorption spectrophotometer (AAS, Hitachi Z-5000) and the CEC was calculated.…”

Section: Sample Characterizationmentioning

confidence: 99%

“…An analysis of the amount of Na released and the amount of Cu adsorbed revealed that some amount of Na was released even with very low adsorption of Cu. This was largely due to the available protons in the experiment medium especially 4 …”

Section: Analysis Of Exchangeable Cations Released At Equilibriummentioning

confidence: 99%

“…It has been reported that excessive intake of Cu by humans may lead to severe mucosal irritation, hepatic and renal damage, widespread capillary damage and central nervous system problems [3]. The World Health Organization recommended a maximum acceptable concentration of Cu in drinking water of 1.5 mg·L −1 [4]. Therefore, the concentration of this metal must be reduced to a level that satisfies national and international environmental best practices (regulations) for various water bodies.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Study of Copper Adsorptivity and Selectivity toward Zeolites

Kabwadza-Corner¹,

Munthali²,

Johan³

et al. 2014

AJAC

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The objectives of the study were to find the type and species of zeolite which gives optimum adsorption of copper, provide an explanation of the mechanism involved in the adsorption process and establish the selectivity sequence among zeolites. Adsorption of Cu onto zeolites and montmorillonite as a reference was conducted at an initial Cu concentration range of 0 -0.60 mM in the presence of 100 mM NH 4 NO 3 at initial pH of 5. Langmuir and Freundlich models were used in analyzing the equilibrium data and a selectivity sequence derived from the Langmuir calculation was A4 > faujasite X > modernite > Na-P1 ≈ montmorillonite ≈ faujasite Y > clinoptilolite. Zeolites A4 and faujasite X had high adsorptive capacities of 1429 mmol·kg −1 and 909 mmol·kg −1 , respectively. Zeolite A4 has the highest CEC among all the samples (6150 mmol·kg −1 ), and the adsorption capacity of Cu was largely influenced by the CEC of the samples. The adsorption mechanism was based on the exchange of Cu from solution with mostly Na which was the main exchangeable cation available. These results are important in selecting the most effective and suitable adsorbent for Cu removal from polluted environments.

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“…The initial pH of the heavy metal is very important factor in any adsorption process [17]. As shown in Fig.…”

Section: A Effect Of Initial Ph Of Pb (Ii) Ion Solutions On Adsorptimentioning

confidence: 99%

Adsorption Removal of Lead Ions by Acacia Tortilis Leaves: Equilibrium, Kinetics and Thermodynamics

Ackacha¹,

Elsharif²

2012

IJESD

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Abstract-In this research, the Acacia tortilis leaves was utilized as an adsorbent material for the removal of lead ions from aqueous solution. Batch experiments were used to predict the adsorption capacity of lead ions onto Acacia tortilis leaves. Different parameters affecting the adsorption process were tested including initial pH of adsorbate, adsorbent dose, contact time and contact temperature. Three kinetic models, including first order, pseudo-second order and intra-particle diffusion were used to analyze the adsorption process. The adsorption process was investigated using Langmuir and Freundlich isotherm models. The maxima adsorption capacities were 704.8, 632.3, 437 and 332 at 303, 313, 323 and 323 K, respectively. Thermodynamic parameters such as gibbs free energy, enthalpy and entropy were calculated to predict the nature of the adsorption. Langmuir and Freundlich models were applied to describe the adsorption isotherm.Index Terms-Lead ions, adsorption, acacia tortilis, langmuir isotherm, thermodynamic parameters.

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Removal of copper and cadmium from the aqueous solutions by activated carbon derived from Ceiba pentandra hulls

Cited by 342 publications

References 22 publications

Simultaneous adsorption behavior of heavy metals onto microporous olive stones activated carbon: analysis of metal interactions

Simultaneous adsorption behavior of heavy metals onto microporous olive stones activated carbon: analysis of metal interactions

Comparative Study of Copper Adsorptivity and Selectivity toward Zeolites

Adsorption Removal of Lead Ions by Acacia Tortilis Leaves: Equilibrium, Kinetics and Thermodynamics

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