Characterization of activated carbon prepared from dates palm fibers by physical activation to the removal of phenol from aqueous solutions

2021 ◽  
Vol 236 ◽  
pp. 190-202
Author(s):  
Djehad Bentarfa ◽  
Mohamed L. Sekirifa ◽  
Mahfoud Hadj-Mahammed ◽  
Dominique Richard ◽  
Stephanie Pallier ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Physical Activation ◽  
Characterization Of Activated Carbon

scholarly journals Production and Characterization of Activated Carbon from Coal for Gold Adsorption in Cyanide Solutions

2020 ◽  
Vol 40 (1) ◽  
pp. 34-44
Author(s):  
Karen L. Martínez-Mendoza ◽  
Juan Manuel Barraza Burgos ◽  
Nilson Marriaga-Cabrales ◽  
Fiderman Machuca-Martinez ◽  
Mariber Barajas ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Physical Activation ◽  
Adsorption Model ◽  
Waste Solution ◽  
Synthetic Solution ◽  
Cyanide Solutions ◽  
Two Stages ◽  
Characterization Of Activated Carbon

In this work, activated carbons were produced using coal as raw matter from seven Colombian carboniferous zones. Physical activation was performed in two stages: a carbonization stage with Nitrogen at a temperature of 850 °C and a residence time of 2 h, followed by an activation stage using steam at temperatures of 700 and 850 °C with residence times of 1,5 h and 2,5 h. From the pore volume characterization for the adsorption of gold, two activated carbons from Cundinamarca, obtained at 850 °C (1,5 h), 850 °C (2,5 h), and a commercial carbon (GRC 22) were selected. Gold adsorption tests were performed with those three activated carbons using synthetic aurocyanide solutions and a gold waste solution. The data of the adsorption isotherms were adjusted using the Freundlich adsorption model for the synthetic solution, as well as Langmuir for the waste solution. The results showed that, using a solution of 1 ppm, the activated carbons C-850-2.5 and C- 850-1.5 produced the higher maximum gold loading capacities in the equilibrium (8,7 and 9,3 mg Au/g, respectively) in comparison to the commercial activated carbon (4,7 mg Au/g).  Gold adsorption test using a waste solution (21 ppm of gold) showed that the activated carbon C-850-1.5 had the highest value of adsorption capacity (4,58 mg Au/g) compared to C-850-2.5 (2,95 mgAu /g).

Preparation and characterization of activated carbon from date stones by physical activation with steam

2008 ◽  
Vol 82 (1) ◽  
pp. 70-77 ◽  
Author(s):  
Chafia Bouchelta ◽  
Mohamed Salah Medjram ◽  
Odile Bertrand ◽  
Jean-Pierre Bellat
Keyword(s):  
Activated Carbon ◽  
Physical Activation ◽  
Characterization Of Activated Carbon

scholarly journals Preparation and characterization of activated carbon from Amygdalus Scoparia shell by chemical activation and its application for removal of lead from aqueous solutions

2010 ◽  
Vol 8 (6) ◽  
pp. 1273-1280 ◽  
Author(s):  
Sayed Mohammadi ◽  
Mohammad Karimi ◽  
Daryoush Afzali ◽  
Fatemeh Mansouri
Keyword(s):  
Activated Carbon ◽  
Aqueous Solutions ◽  
Low Cost ◽  
Chemical Activation ◽  
Maximum Adsorption Capacity ◽  
Batch Tests ◽  
Amygdalus Scoparia ◽  
Langmuir And Freundlich Equations ◽  
Characterization Of Activated Carbon

AbstractTwo series of activated carbon have been prepared by chemical activation of Amygdalus Scoparia shell with phosphoric acid or zinc chloride for the removal of Pb(II) ions from aqueous solutions. Several methods were employed to characterize the active carbon produced. The surface area was calculated using the standard Brunauer-Emmet-Teller method. The microstructures of the resultant activated carbon were observed by scanning electron microscopy. The chemical composition of the surface resultant activated carbon was determined by Fourier transform infrared spectroscopy. In the batch tests, the effect of pH, initial concentration, and contact time on the adsorption were studied. The data were fitted with Langmuir and Freundlich equations to describe the equilibrium isotherms. The maximum adsorption capacity of Pb(II) on the resultant activated carbon was 36.63 mg g−1 with H3PO4 and 28.74 mg g−1 with ZnCl2. To regenerate the spent adsorbents, desorption experiments were performed using 0.25 mol L−1 HCl. Here we propose that the activated carbon produced from Amygdalus Scoparia shell is an alternative low-cost adsorbent for Pb(II) adsorption.

scholarly journals Karakteristik luas permukaan karbon aktif dari ampas tebu dengan aktivasi kimia

2018 ◽  
Vol 10 (3) ◽  
pp. 149
Author(s):  
Mahmud Sudibandriyo ◽  
L Lydia
Keyword(s):  
Activated Carbon ◽  
Surface Area ◽  
Sugarcane Bagasse ◽  
Chemical Activation ◽  
High Surface ◽  
High Surface Area ◽  
Physical Activation ◽  
Mass Ratio ◽  
Characterization Of Activated Carbon

Surface area characterization of activated carbon from sugarcane baggase by chemical activationAdsorption is one the process with many applications in the industries such as in a separation or in gas storage. In this adsorption, adsorbent selection is the most important thing. One of the adsorbent most suitable for this process is activated carbon. Previous studies show that high surface area of activated carbon can be produced from sugarcane bagasse using activator ZnCl2. The research’s goal is to produce activated carbon from sugarcane bagasse and determine the effects of activator on the surface area of activated carbon produced. Activators used in this research are KOH and ZnCl2 with the mass ratio of activator/carbon are 1/1, 2/1 and 3/1. The results show that The highest surface area, 938,2 m2/g, is obtained by activation using KOH with mass ratio of activator/carbon 3/1, whereas the highest surface area by activation using ZnCl2 is 632 m2/g with mass ratio of activator/carbon 2/1. For comparison, preparation of activated carbon by physical activation is also done and the surface area is 293 m2/g.Keywords: Activated carbon, chemical activation, sugarcane bagasse, KOH, ZnCl2 Abstrak Adsorpsi merupakan salah satu proses yang banyak digunakan dalam industri baik dalam pemisahan maupun untuk penyimpanan gas. Pada proses adsorpsi ini, pemilihan adsorben merupakan hal yang sangat penting. Salah satu jenis adsorben yang sangat cocok untuk proses ini adalah karbon aktif. Penelusuran studi sebelumnya menunjukkan bahwa karbon aktif dengan luas permukaan yang cukup tinggi dapat dibuat dari ampas tebu dengan menggunakan aktivator ZnCl2. Penelitian ini bertujuan untuk menghasilkan karbon aktif dari ampas tebu dengan aktivasi kimia serta mengetahui pengaruh aktivator terhadap luas permukaan karbon aktif yang dihasilkan. Aktivator yang digunakan dalam penelitian ini adalah KOH dan ZnCl2 dengan rasio massa aktivator/massa karbon 1/1, 2/1, dan 3/1. Aktivasi dilakukan pada temperatur 700 oC selama 1 jam. Hasil penelitian menunjukkan bahwa luas permukaan tertinggi sebesar 938,2 m2/g diperoleh dengan aktivasi menggunakan KOH dengan rasio massa aktivator/massa arang 3/1, sedangkan aktivasi dengan menggunakan ZnCl2 diperoleh luas permukaan tertinggi sebesar 632 m2/g dengan rasio massa aktivator/massa arang 2/1. Sebagai pembanding, pada penelitian ini juga dilakukan pembuatan karbon aktif dengan metode aktivasi fisika dan diperoleh luas permukaan karbon aktif sebesar 293 m2/g.Kata kunci: Aktivasi kimia, ampas tebu, karbon aktif, KOH, ZnCl2

scholarly journals Synthesis and characterization of activated carbon from sugar beet residue for the adsorption of hexavalent chromium in aqueous solutions

RSC Advances ◽  
2021 ◽  
Vol 11 (14) ◽  
pp. 8025-8032
Author(s):  
Jiaming Zhao ◽  
Lihua Yu ◽  
Feng Zhou ◽  
Huixia Ma ◽  
Kongyan Yang ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Sugar Beet ◽  
Aqueous Solutions ◽  
Hexavalent Chromium ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Synthesis And Characterization ◽  
Step Method ◽  
Characterization Of Activated Carbon

A series of micro–mesoporous activated carbons (ACs) were prepared from sugar beet residue by a two-step method including KOH chemical activation and were used for Cr(vi) removal from aqueous solutions.

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