Fixed-Bed Column Study for Zn (II) Removal from Solution Using Raw Rice Husk

2011 ◽  
Vol 197-198 ◽  
pp. 234-237
Author(s):  
Zai Fang Deng ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Rice Husk ◽  
Flow Rate ◽  
Adsorption Process ◽  
Fixed Bed ◽  
Design Parameters ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Initial Concentration ◽  
Column Design ◽  
Bed Depth Service Time

A fixed bed of raw rice husk was used for the removal of Zn (II) from aqueous solution. The material as adopted was found to be an efficient media for the removal of Zn (II) in continuous mode using fixed bed column. Different column design parameters like depth of exchange zone, flow rate and initial concentration were calculated. When conducted with Zn (II) concentration 10 mg.L-1 and flow rate 10 ml.min-1 with different bed depths such as 3, 6 and 9 cm, the equilibrium uptake was 3.366, 2.847 and 2.764 mg.g-1, respectively. The equilibrium uptake decreased from 2.802 to 1.975 mg.g-1 with increasing of flow rate from 5 to 15 mL.min-1 and increased from 2.764 to 3.798 mg.g-1 when initial concentration increased from 10 to 30 mg.L-1. The dynamics of adsorption process was modeled by bed depth service time (BDST), and indicating the validity of BDST model when applied to the continuous column studies.

Fixed-Bed Column Study for Zn (II) Removal from Solution Using Expanding Rice Husk

2011 ◽  
Vol 695 ◽  
pp. 29-32
Author(s):  
Zai Fang Deng ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Rice Husk ◽  
Flow Rate ◽  
Adsorption Process ◽  
Fixed Bed ◽  
Design Parameters ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Initial Concentration ◽  
Bed Height ◽  
Column Design

The performance of expanding rice husk (ERH) fixed bed column in removing Zn (II) from aqueous solution were studied in this work. Different column design parameters like bed height, flow rate and initial concentration were calculated. It was found that ERH was found to be an effective adsorbent for removal of Zn (II); and when conducted with Zn (II) concentration 12.8 mg L-1and flow rate 10 ml min-1with different bed depths such as 3, 6 and 9 cm, the equilibrium uptake was decreased from 5.181 to 4.33 mg g-1; the equilibrium uptake also decreased from 4.51 to 3.807 mg g-1with increasing of flow rate from 5 to 15 ml min-1and increased from 4.447 to 5.752 mg g-1when initial concentration increased from 12.8 to 35 mg L-1. The dynamics of adsorption process was modeled by bed depth service time (BDST), and indicating the validity of BDST model when applied to the continuous column studies.

Fixed Bed Column Filled with Rice Husk for the Removal of Cu (II) from Aqueous Solution

2010 ◽  
Vol 658 ◽  
pp. 53-56
Author(s):  
Zai Fang Deng ◽  
Xue Gang Luo ◽  
Xiao Yan Lin
Keyword(s):  
Aqueous Solution ◽  
Rice Husk ◽  
Flow Rate ◽  
Low Cost ◽  
Fixed Bed ◽  
Design Parameters ◽  
Breakthrough Time ◽  
Fixed Bed Column ◽  
Initial Concentration ◽  
Column Design

The performance of low-cost adsorbent such as rice husk fixed bed column in removing copper from aqueous solution were studied in this work. Different column design parameters like bed height, flow rate and initial concentration were calculated. It was found that at 10 mg/L concentration of Cu (Ⅱ) and at flow rate 5 mL/min with different bed depths such as 9, 12 and 15 cm, the breakthrough time increases from 150 to 260 min; the breakthrough time increases from 125 to 780 min with decreasing of flow rate from 15 to 5 mL/min and decreased from 260 to 50 min when initial concentration increased from 7 to 50 mg/L.

Fixed-Bed Column Study for the Removal of Ag(I)and Cr(III) from Aqueous Solutions Using Puffed Rice Husk

2011 ◽  
Vol 287-290 ◽  
pp. 1620-1625
Author(s):  
Yan Wu ◽  
Zai Fang Deng ◽  
Yang Tao ◽  
Xue Gang Luo
Keyword(s):  
Aqueous Solutions ◽  
Rice Husk ◽  
Flow Rate ◽  
Service Time ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Model Parameters ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Puffed Rice

Fixed-bed column studies for the removal of Ag(Ⅰ) and Cr(Ⅲ) from individual aqueous solutions using puffed rice husk were investigated in this work. The experiments were conducted to study the effect of important column parameters such as bed height, feed flow rate and feed initial concentration of solution. It was found that increasing bed depth yielded longer service time while increase in influent concentration and flow rate resulted in faster breakthrough. Bed Depth Service Time (BDST) model was applied to analyze the experimental data and the model parameters were evaluated. Good agreement of the experimental breakthrough curves with the model predictions was observed.

scholarly journals FIXED-BED ADSORPTION OF AQUEOUS VANILLIN ONTO RESIN H103

2017 ◽  
Vol 18 (2) ◽  
pp. 94-104
Author(s):  
Rozaimi Abu Samah
Keyword(s):  
Aqueous Solution ◽  
Flow Rate ◽  
Adsorption Process ◽  
Fixed Bed ◽  
Maximum Adsorption Capacity ◽  
Feed Flow Rate ◽  
Fixed Bed Column ◽  
Initial Concentration ◽  
Bed Height ◽  
Fixed Bed Adsorption

The main objective of this work was to design and model fixed bed adsorption column for the adsorption of vanillin from aqueous solution. Three parameters were evaluated for identifying the performance of vanillin adsorption in fixed-bed mode, which were bed height, vanillin initial concentration, and feed flow rate. The maximum adsorption capacity was increased more than threefold to 314.96 mg vanillin/g resin when the bed height was increased from 5 cm to 15 cm. Bohart-Adams model and Belter equation were used for designing fixed-bed column and predicting the performance of the adsorption process. A high value of determination coefficient (R2) of 0.9672 was obtained for the modelling of vanillin adsorption onto resin H103.

scholarly journals Modeling of lead (II) adsorption on sodium hydroxide treated rice husk: Fixed-bed studies

2017 ◽  
Vol 13 (4) ◽  
pp. 803-806 ◽  
Author(s):  
Abdurrahman Garba ◽  
Hatijah Basri ◽  
Noor Shawal Nasri ◽  
Umar Hayatu Siddiq ◽  
Abdul Rasheed Abdul Rahman
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Rice Husk ◽  
Flow Rate ◽  
Adsorption Process ◽  
Lead Concentration ◽  
Fixed Bed ◽  
The Other ◽  
Fixed Bed Column

The treated rice husk has been evaluated as a sorbent for removing lead (II) from aqueous solutions in fixed-bed studies. In this paper, the effects of flow rate (3 and 9 mL/min), bed depth (0.9, 1.8 and 2.8 cm) and influent lead concentration of (5 and 20 mg/L) on the adsorption capacity of the adsorbent in a fixed-bed column were investigated. The highest adsorption capacity (78 %) on a 20 mg/L Pb (II) solution was achieved within a flow rate of 9 mL/min and a bed depth of 2.8 cm. The experimental data obtained from the adsorption process was correlated with the Thomas, Adams– Bohart and Yoon–Nelson models. The results of the parameters indicated Adams–Bohart model fitted well over the other models.

Fixed-Bed Adsorption Column Studies for the Removal of Methyl Orange from Water Using Polyethyleneimine-Graphene Oxide Polymer Nanocomposite Beads

2021 ◽  
Vol 891 ◽  
pp. 31-36
Author(s):  
Jirah Emmanuel T. Nolasco ◽  
Camille Margaret S. Alvarillo ◽  
Joshua L. Chua ◽  
Ysabel Marie C. Gonzales ◽  
Jem Valerie D. Perez
Keyword(s):  
Graphene Oxide ◽  
Methyl Orange ◽  
Large Scale ◽  
Scale Up ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Design Parameters ◽  
Column Studies ◽  
Fixed Bed Column ◽  
Adsorption Column

Continuous fixed-bed column studies were performed using nanocomposite beads made up of chitosan, polyethyleneimine, and graphene oxide as adsorbents for the removal of methyl orange (MO) in water. The effects of different operating parameters such as initial MO concentration (5, 10, and 15 ppm), bed height (10, 17.5, and 25 cm), and flow rate (27, 43, and 58 mL/min) were investigated using an upward-flow fixed-bed column set-up. The breakthrough curves generated were fitted with Adams-Bohart, Thomas, Yoon-Nelson, and Yan et al. models. The results showed that Yan et al. model agreed best with the breakthrough curves having an R2 as high as 0.9917. Lastly, design parameters for a large-scale adsorption column were determined via scale-up approach using the parameters obtained from column runs.

scholarly journals Study of a fixed-bed column in the adsorption of an azo dye from an aqueous medium using a chitosan–glutaraldehyde biosorbent

2017 ◽  
Vol 36 (1-2) ◽  
pp. 215-232 ◽  
Author(s):  
Jaime López-Cervantes ◽  
Dalia I Sánchez-Machado ◽  
Reyna G Sánchez-Duarte ◽  
Ma A Correa-Murrieta
Keyword(s):  
Flow Rate ◽  
Service Time ◽  
Fixed Bed ◽  
Textile Dye ◽  
Time Model ◽  
Fixed Bed Column ◽  
Bed Height ◽  
Direct Blue ◽  
Direct Blue 71 ◽  
Bed Depth Service Time

A continuous adsorption study in a fixed-bed column was carried out using a chitosan–glutaraldehyde biosorbent for the removal of the textile dye Direct Blue 71 from an aqueous solution. The biosorbent was prepared from shrimp shells and characterized by scanning electron microscopy, X-ray diffraction, and nuclear magnetic resonance spectroscopy. The effects of chitosan–glutaraldehyde bed height (3–12 cm), inlet Direct Blue 71 concentration (15–50 mg l−1), and feed flow rate (1–3 ml min−1) on the column performance were analyzed. The highest bed capacity of 343.59 mg Direct Blue 71 per gram of chitosan–glutaraldehyde adsorbent was obtained using 1 ml min−1 flow rate, 50 mg l−1 inlet Direct Blue 71 concentration, and 3 cm bed height. The breakthrough curve was analyzed using the Adams–Bohart, Thomas, and bed depth service time mathematical models. The behaviors of the breakthrough curves were defined by the Thomas model at different conditions. The bed depth service time model showed good agreement with the experimental data, and the high values of correlation coefficients (R2 ≥ 0.9646) obtained indicate the validity of the bed depth service time model for the present column system.

scholarly journals Fixed - bed Column Adsorption Studies Using Synthetic Hydroxyapatite for Pb(II) Removal from Aqueous Solutions

2019 ◽  
Vol 70 (5) ◽  
pp. 1758-1764
Author(s):  
Claudia Maria Simonescu ◽  
Iuliana-Raluca Tanase ◽  
Irina Nicoleta Purcaru ◽  
Christu Tardei ◽  
Virgil Marinescu
Keyword(s):  
Aqueous Solutions ◽  
Fixed Bed ◽  
Experimental Studies ◽  
Design Parameters ◽  
Fixed Bed Column ◽  
Column Adsorption ◽  
Porous Beads ◽  
Synthetic Hydroxyapatite ◽  
Column Design ◽  
Critical Bed Depth

In the present paper, the adsorptive Pb(II) removal from synthetic aqueous solutions using a 2 cm diameter hydroxyapatite column has been studied through column adsorption experiments by varying column depths (1, 2, 3, 4 cm) and flow rate (10, 15, 22.5 mL/min). Different types of synthetic hydroxiapatites have been involved in experiments. Column design parameters such as critical bed depth and adsorption capacity have been determined from experimental studies. The results revealed the effectiveness of synthetic hydroxyapatite porous beads in Pb(II) removal from aqueous synthetic solutions.

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