Surface and porous characterization of activated carbon prepared from pyrolysis of biomass by two-stage procedure at low activation temperature and it's the adsorption of iodine

Ceyhan, Ayhan Abdullah; Şahi̇n, Ömer; Baytar, Orhan; Saka, Cafer

doi:10.1016/j.jaap.2013.06.009

Cited by 87 publications

(23 citation statements)

References 48 publications

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“…The last cited authors reported that an activated carbon with a high amount of carboxylic groups and low pH pzc is an effective adsorbent of heavy metals. The diverse characteristics of activated carbon are incorporated by physical or chemical activation and depend on the type of precursor, activation conditions, activation agent, and mode (Kasnejad et al 2012;Ceyhan et al 2013). Furthermore, the non-uniform adsorption sites in AC provide complex and varied interactions during the adsorption process .…”

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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“…The porous structures is divided according to the diameters of the pores into micro pores with a diameter < 2 nm, meso pores with diameters in the size of 2-50 nm and macro pores with diameters > 50 nm. The distribution of these pores, in combination with the specific surface area is dependent on the starting materials and the process parameters used [6][7][8]. According to our (so far unpublished) results the specific surface areas and the pore size distribution is highly dependent on the process used for the production.…”

Section: Introductionmentioning

confidence: 76%

Comparison of the Properties of Activated Carbons Produced in a One-stage And a Two-Stage Process

Bergna¹,

Varila²,

Romar³

et al. 2018

Preprint

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Activated carbons (ACs) can be produced from biomass in a thermal process either in a direct carbonization-activation process or first by carbonizing the biomass and later on activating the biochars into activated carbons. The properties of the ACs are dependent on the type of process used for production. In this study, the properties of activated carbons produced in a one-stage and a two-stage process are considered. Activated carbons were produced by physical activation of two types of starting materials, biochars produced from spruce and birch chips in a commercial carbonization plant and from the corresponding raw chips. The activated carbons produced were characterized regarding specific surfaces, pore volumes and pore size distributions. The unactivated biochars had some degree of surface area and some porosity. According to the results obtained, two slightly different types of activated carbons are produced depending if a one-stage or a two-stage carbonization and activation process is used. The ACs produced in the one-stage process had higher specific surface areas compared to the ones produced in a two-stage process. In addition, total pore volumes were higher in one-stage process but development of micropores is greater compared to two-stage process. There was no significant difference in total carbon content between one-stage and two-stage process.

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“…-1 Alternatively, methyl violet number was highest at 110 mg g for 4 hr activation time. As activation time increases, iodine number decreases (Ceyhan et al, 2013). Besides, residence time also influences the porosity development during the activation process.…”

Section: Methylene Blue Number (Mg G )mentioning

confidence: 99%

Production of activated carbon from mango seed coat using chemical activation

Vijayakumar¹,

Arulmozhi²,

Kumar³

et al. 2019

JEB

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Surface and porous characterization of activated carbon prepared from pyrolysis of biomass by two-stage procedure at low activation temperature and it's the adsorption of iodine

Cited by 87 publications

References 48 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

Comparison of the Properties of Activated Carbons Produced in a One-stage And a Two-Stage Process

Production of activated carbon from mango seed coat using chemical activation

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