Adsorption of metal ions by pecan shell-based granular activated carbons

Bansode, Rishipal R.; Losso, Jack N.; Marshall, Wayne E.; Rao, R. Shyama Prasad; Portier, Ralph J.

doi:10.1016/s0960-8524(03)00064-6

Cited by 168 publications

(82 citation statements)

References 10 publications

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“…This observation conformed to the finding made by Seshadri et al [10]. The percentage of hardness observed for a particular absorbent depends on its density [11]. The lower yield of the acid activated adsorbent than the carbonized form might have been as a result of the release of the volatile compounds to the surroundings and the release of these volatile materials might have been the probable reason for pore size development.…”

Section: Physicochemical Properties Of the Adsorbentssupporting

confidence: 91%

Sequestering of Ni (II) and Co (II) from Aqueous Solution Using Spines of <i>Bombax buonopozense</i> as Low-Cost Adsorbent

Mustapha¹

2017

AJCHE

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Abstract:The release of potentially toxic elements either by anthropogenic or industrial activities has deteriorated water quality rendering water bodies unsuitable. It was on this basis that readily available agricultural waste was used to treat simulated wastewater containing the potentially toxic element (Ni and Co). Adsorption studies of Co and Ni from aqueous solution were performed using spines of Bombax buonopozense (raw), carbon prepared from Bombax buonopozense (AC 1 ) and activated carbon prepared from modification of spines of cotton silk tree (AC 2 ). Batch adsorption techniques were carried out as a function of contact time, pH, initial concentration, temperature, and dosage. The respective optimum contact times required for adsorption Co and Ni were 90 min. Characterizations of adsorbents were carried out which include: bulk density, hardness, electrical conductivity, ash contents, percentage moisture, and yield. Fourier transform infra-red spectroscopy (FTIR) showed that functional groups in the sorbents were responsible for the adsorption process. The adsorption isotherms data were tested for Langmuir, Temkin and Freundlich equations. The pseudo-first-order, pseudo-second-order, Elovich and diffusion (intra-particle) models were investigated on the adsorption kinetic data. This could be as a result of ion exchange involved in the sequestration of metal ions by the adsorbents. Therefore, sorption using spines of Bombax buonopozense has been adjudged as one of the best tools for replacing conventional methods for the removal of these metals because of its efficiency, costeffectiveness and the availability of the adsorbents.

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Section: Physicochemical Properties Of the Adsorbentssupporting

confidence: 91%

Sequestering of Ni (II) and Co (II) from Aqueous Solution Using Spines of <i>Bombax buonopozense</i> as Low-Cost Adsorbent

Mustapha¹

2017

AJCHE

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“…Coconut shell is a potential precursor for the production of ACs due to its excellent natural structure and low ash content. Conversion of coconut shells into activated carbons which can be used as adsorbents in water purification or treatment of industrial and municipal effluents would add value to these agricultural commodities, help reduce the cost of waste disposal, and provide a potentially cheap alternative to existing commercial carbons [14,15]. In this paper, systematic laboratory investigations of the removal of Pb 2+ from aqueous solutions using coconut shell carbons as adsorbent have been reported and different models of isotherms and adsorption kinetics were fitted to the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Studies of Coconut Shell Carbons Prepared by KOH Activation for Removal of Lead(II) From Aqueous Solutions

et al. 2013

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Abstract:Removal of Pb 2+ from aqueous solutions using coconut shell carbons produced by KOH activation is performed in this paper. Morphology and pore structure characteristic of coconut shell carbons are analyzed by SEM and nitrogen adsorption techniques. Effects of adsorbent concentration, agitation time and initial ion concentration on the adsorption behavior are investigated, and adsorption isotherm and kinetics on coconut shell carbons are also studied. The results show that high weight ratio of KOH/sample is favorable to produce rich porous structure. The resultant coconut shell carbons with a high specific surface area of 1135 m 2 /g is obtained and demonstrates good adsorption potential on removal of Pb 2+ from aqueous solutions. Adsorption data fit well with Freundlich and Halsey isotherms. The kinetic studies indicate that adsorption behavior can be described by pseudo-second-order kinetic model, which also follows external diffusion and intra-particle diffusion in the adsorption process.

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“…It was evident that adsorbents, soybean hulls modified by citric acid, maize bran, orange peel, and chitosan coated on acid-treated palm shell charcoal, coir pith, coir pith AC, and oil [223]. These adsorbents were found to have superior metal adsorbing capabilities when compared with commercial activated carbon (CAC), which had adsorption capacity as follows: Cd(II), 146.00 mg/g; Cr(VI), 145.00 mg/g; Cu(II), 15.47 mg/g; Pb(II), 41.00 mg/g; and Zn(II), 20.00 mg/g [224]. Therefore, the lowcost adsorbents from agricultural by-products/wastes are good for substituting the very expensive commercial ones, and it is a great chance for those developing countries in particular which face numerous challenges that sometime restrict investments geared toward preserving the environment.…”

Section: Case Studies On Ac Derived Frommentioning

confidence: 99%

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

Sulyman

Namieśnik

Gierak

2017

Pol. J. Environ. Stud.

201

112

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A major threat to the comfort of human life has been imposed by increased industrialization and urbanization. The generation and disposal of huge amounts of toxic materials and pollutants have heavily contaminated our environment. Some Organics such as synthetic dyes (SD) and heavy metals (HM) are becoming increasingly prevalent as the most dangerous pollutants in soil and surface water environments. They are causing great concern worldwide due to their toxicity to many life forms.Environmentally friendly utilization of agricultural by-products/waste materials either as raw materials or in production of so-called activated carbons (AC) is an important issue. Because it is apparent from our literature review that the main factors characterizing these materials are their affordability, local availability, and efficiencies in removing many unwanted toxics and pollutants, they therefore could be utilized instead of more conventional but expensive adsorbent materials, particularly in developing countries where many industries lack appropriate individual sewage treatment systems; even where they exist, they lack satisfactory functioning and maintenance because of the lack of good budgets.A number of case studies are supplied in this review. These case studies have pointed to the efficient removal of SD/HM ions from aqueous solutions by the agricultural by-products/wastes in the form of a raw material, signifying spent tea leaves (STL) as a good example. Besides, the efficient removal of such ions by AC produced from these agricultural by-products/wastes has also been given in detail, suggesting a variety of AC agricultural by-products/wastes sources. Both kinds are widely used adsorbents in the treatment of wastewaters. Our review has shown that these adsorbents are characterized by many exceptional physical and chemical features that make them widely used adsorbents in the treatment of wastewaters. The adsorption efficiencies by these substances were also affected by the characteristics of AC, which depend on the physical and chemical properties of the precursor (i.e., agricultural by-products/wastes) as well as on the activation method applied, which is either chemical or physical. The structural properties of the resulting

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Adsorption of metal ions by pecan shell-based granular activated carbons

Cited by 168 publications

References 10 publications

Sequestering of Ni (II) and Co (II) from Aqueous Solution Using Spines of <i>Bombax buonopozense</i> as Low-Cost Adsorbent

Sequestering of Ni (II) and Co (II) from Aqueous Solution Using Spines of <i>Bombax buonopozense</i> as Low-Cost Adsorbent

Adsorption Studies of Coconut Shell Carbons Prepared by KOH Activation for Removal of Lead(II) From Aqueous Solutions

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

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Adsorption of metal ions by pecan shell-based granular activated carbons

Cited by 168 publications

References 10 publications

Sequestering of Ni (II) and Co (II) from Aqueous Solution Using Spines of &lt;i&gt;Bombax buonopozense&lt;/i&gt; as Low-Cost Adsorbent

Sequestering of Ni (II) and Co (II) from Aqueous Solution Using Spines of &lt;i&gt;Bombax buonopozense&lt;/i&gt; as Low-Cost Adsorbent

Adsorption Studies of Coconut Shell Carbons Prepared by KOH Activation for Removal of Lead(II) From Aqueous Solutions

Low-cost Adsorbents Derived from Agricultural By-products/Wastes for Enhancing Contaminant Uptakes from Wastewater: A Review

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Sequestering of Ni (II) and Co (II) from Aqueous Solution Using Spines of <i>Bombax buonopozense</i> as Low-Cost Adsorbent

Sequestering of Ni (II) and Co (II) from Aqueous Solution Using Spines of <i>Bombax buonopozense</i> as Low-Cost Adsorbent