Fixed bed modelling for acid dye adsorption onto activated carbon

2003 ◽  
Vol 78 (12) ◽  
pp. 1281-1289 ◽  
Author(s):  
Vinci KC Lee ◽  
John F Porter ◽  
Gordon McKay
Keyword(s):  
Activated Carbon ◽  
Fixed Bed ◽  
Dye Adsorption ◽  
Acid Dye

Efficiency of Bamboo Waste Activated Carbon on Acid Dye Wastewater Treatment

2014 ◽  
Vol 931-932 ◽  
pp. 640-644
Author(s):  
Kanuengnit Suwanasing ◽  
Mudjalin Poonprasit
Keyword(s):  
Wastewater Treatment ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Average Pore Size ◽  
Dye Adsorption ◽  
Weight Ratio ◽  
Synthetic Wastewater ◽  
Acid Dye ◽  
Nacl Solution ◽  
Study Results

This research aims to produce activated carbon from bamboo waste (used bamboo chopsticks), activated by low-cost and non-toxic chemical substance (Sodium Chloride, NaCl), as an option for silk dyeing wastewater treatment in a small cottage industry. Initially, used bamboo chopsticks were carbonization at 600 °C to produce bamboo charcoal. Then the charcoal was activated using three different methods: (a) soaking in the NaCl solution at the charcoal to NaCl (weight/weight) ratio of 1:1; (b) burning at 800 °C; and (c) activating using the previously mentioned 2 methods together by soaking in the NaCl solution at the ratio of 1:1 then burning at 800 °C. The activated carbons physical characteristics study has found that the activated carbon activated using the third method had the highest BET specific surface area of 327.69 m2/g, total specific pore volume of 0.18 mg/l, and average pore size of 22.52 Å. The adsorption study of the activated carbon activated by NaCl and temperature used synthetic wastewater of red acid dye (AR114) with the initial concentrations of 20 mg/l. The study results have showed that the activated carbon activated by NaCl and temperature reached equilibrium within 180 minutes, and had the color removal efficiency of 77.36%. The adsorption isotherm study results have indicated that the acid dye adsorption of the activated carbon activated by NaCl and temperature followed the Langmuir isotherm.

Chitosan‐Coated Glass Beads in a Fluidized Bed for Use in Fixed‐Bed Dye Adsorption

2021 ◽  
Author(s):  
Daniele Costa da Silva Alves ◽  
Roni Anderson Capa Verde Pires ◽  
Francine Fonseca Diniz Algã ◽  
Janaina Oliveira Gonçalves ◽  
Guilherme Luiz Dotto ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Fixed Bed ◽  
Dye Adsorption ◽  
Glass Beads ◽  
Coated Glass

scholarly journals Investigating the performance of agricultural wastes and their ashes in removing phenol from leachate in a fixed-bed column

2020 ◽  
Vol 81 (10) ◽  
pp. 2109-2126 ◽  
Author(s):  
Seyed Omid Ahmadinejad ◽  
Seyed Taghi Omid Naeeni ◽  
Zahra Akbari ◽  
Sara Nazif
Keyword(s):  
Activated Carbon ◽  
Large Scale ◽  
Fixed Bed ◽  
Walnut Shell ◽  
Continuous Systems ◽  
Phenol Removal ◽  
Adsorption Method ◽  
Fixed Bed Column ◽  
Saturation Time ◽  
Coconut Shell Activated Carbon

Abstract One of the major pollutants in leachate is phenol. Due to safety and environmental problems, removal of phenol from leachate is essential. Most of the adsorption studies have been conducted in batch systems. Practically, large-scale adsorption is carried out in continuous systems. In this research, the adsorption method has been used for phenol removal from leachate by using walnut shell activated carbon (WSA) and coconut shell activated carbon (CSA) as adsorbents in a fixed-bed column. The effect of adsorbent bed depth, influent phenol concentration and type of adsorbent on adsorption was explored. By increasing the depth of the adsorbent bed in the column, phenol removal efficiency and saturation time increase significantly. Also, by increasing the influent concentration, saturation time of the column decreases. To predict the column performance and describe the breakthrough curve, three kinetic models of Yon-Nelson, Adams-Bohart and Thomas were applied. The results of the experiments indicate that there is a good match between the results of the experiment and the predicted results of the models.

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