Biosorption of copper ion by natural and modified wheat straw in fixed-bed column

2013 ◽  
Vol 51 (28-30) ◽  
pp. 5735-5745 ◽  
Author(s):  
Yike Li ◽  
Binglu Zhao ◽  
Lijun Zhang ◽  
Runping Han
Keyword(s):  
Wheat Straw ◽  
Fixed Bed ◽  
Copper Ion ◽  
Fixed Bed Column

Adsorption of Copper Ions and Methylene Blue on Natural Wheat Straw and Modified Wheat Straw in Single and Binary System: Column Mode

2013 ◽  
Vol 791-793 ◽  
pp. 52-55 ◽  
Author(s):  
Yin Yin Su ◽  
Wei Xiao ◽  
Yu Bin Jiao ◽  
Run Ping Han ◽  
Yan Qiang Li
Keyword(s):  
Methylene Blue ◽  
Binary System ◽  
Wheat Straw ◽  
Copper Ions ◽  
Fixed Bed ◽  
Copper Ion ◽  
Fixed Bed Column ◽  
Adsorption Behaviors ◽  
Column Adsorption ◽  
Adsorption Quantity

Adsorption of copper ion and methylene blue (MB) ion from aqueous solution was performed by natural wheat straw (NWS) and modified wheat straw (MWS) with citric acid (CA) in fixed-bed column. Adsorption behaviors of single system and binary system were compared at same experimental condition. There was higher adsorption capacity of MWS for binding Cu2+ and MB. In the binary system of Cu2+ and MB coexisted in solution, there was competitive adsorption. The adsorption quantity of Cu2+ or MB decreased with MB or Cu2+ existed. NWS and MWS can simultaneously adsorb Cu2+ and MB from mixtures.

scholarly journals Sorption of Ag+ and Cu2+ by Vermiculite in a Fixed-Bed Column: Design, Process Optimization and Dynamics Investigations

2018 ◽  
Vol 8 (11) ◽  
pp. 2221 ◽  
Author(s):  
Olga Długosz ◽  
Marcin Banach
Keyword(s):  
Flow Rate ◽  
Continuous Process ◽  
Fixed Bed ◽  
Copper Ion ◽  
Cost Effective ◽  
Breakthrough Curves ◽  
Fixed Bed Column ◽  
Column System ◽  
Total Percentage ◽  
Bed Height

Vermiculite has been used for the removal of Cu 2 + and Ag + from aqueous solutions in a fixed-bed column system. The effects of initial silver and copper ion concentrations, flow rate, and bed height of the adsorbent in a fixed-bed column system were investigated. Statistical analysis confirmed that breakthrough curves depended on all three factors. The highest inlet metal cation concentration (5000 mg/dm3), the lowest bed height (3 cm) and the lowest flow rate (2 and 3 cm3/min for Ag + and Cu 2 + , respectively) were optimal for the adsorption process. The maximum total percentage of metal ions removed was 60.4% and 68.7% for Ag+ and Cu2+, respectively. Adsorption data were fitted with four fixed-bed adsorption models, namely Clark, Bohart–Adams, Yoon–Nelson and Thomas models, to predict breakthrough curves and to determine the characteristic column parameters. The adsorbent was characterized by SEM, FTIR, EDS and BET techniques. The results showed that vermiculite could be applied as a cost-effective sorbent for the removal of Cu 2 + and Ag + from wastewater in a continuous process.

scholarly journals Biosorption of Cd²+ and Cu²+ onto wheat straw using batch and continuous fixed-bed column systems

2021 ◽  
Author(s):  
Hameed Muhamad
Keyword(s):  
Experimental Data ◽  
Wheat Straw ◽  
Metal Removal ◽  
Fixed Bed ◽  
Fixed Bed Column ◽  
Bed Height ◽  
Batch System ◽  
Langmuir Isotherm Model ◽  
Concentration Changes ◽  
Triticum Sativum

Biosorption of Cd²+ and Cu²+ by wheat straw (Triticum Sativum) using a batch system and a continuous upflow mode in a fixed bed column was studied. For batch system, the effect of pH over a range from 3.0 to 7.0 and the temperature from 20 to 40ºC on the metal removal was investigated. Various initial metal concentrations from 20 to 150 mg/L were used. Adsorption of metal ions was observed to increase with liquid pH and temperature. Among the three widely used isotherms, namely the Langmuir, Freundlich, and Timken models, the experimental data better fitted the Langmuir isotherm model. For the continuous upflow mode in a fixed bed (4-inch diameter), experiments were performed over a range of flow rate from 0.3-1.0 LPM and varied bed height of 0.5-2.0m. The results obtained also agree (BDST) model. In addition, for estimations of the parameters that are necessary for the design of a fixed bed adsorber in paractical application, the experimental data were fitted to the Thomas, Adams-Bohart, Yan and Yoon-Nelson models. Thomas model appeared to describe the experimental results well. Mathematical model was developed to simulate the concentration changes at the experimental time instances.

Biosorption of methylene blue by natural and chemical modified wheat straw in fixed-bed column

2012 ◽  
Vol 51 (22-24) ◽  
pp. 4514-4523 ◽  
Author(s):  
Xiaofeng Ren ◽  
Xiaona Zhang ◽  
Lijun Zhang ◽  
Runping Han
Keyword(s):  
Methylene Blue ◽  
Wheat Straw ◽  
Fixed Bed ◽  
Fixed Bed Column

scholarly journals Biosorption of Cd²+ and Cu²+ onto wheat straw using batch and continuous fixed-bed column systems

2021 ◽  
Author(s):  
Hameed Muhamad
Keyword(s):  
Experimental Data ◽  
Wheat Straw ◽  
Metal Removal ◽  
Fixed Bed ◽  
Fixed Bed Column ◽  
Bed Height ◽  
Batch System ◽  
Langmuir Isotherm Model ◽  
Concentration Changes ◽  
Triticum Sativum

Biosorption of Cd²+ and Cu²+ by wheat straw (Triticum Sativum) using a batch system and a continuous upflow mode in a fixed bed column was studied. For batch system, the effect of pH over a range from 3.0 to 7.0 and the temperature from 20 to 40ºC on the metal removal was investigated. Various initial metal concentrations from 20 to 150 mg/L were used. Adsorption of metal ions was observed to increase with liquid pH and temperature. Among the three widely used isotherms, namely the Langmuir, Freundlich, and Timken models, the experimental data better fitted the Langmuir isotherm model. For the continuous upflow mode in a fixed bed (4-inch diameter), experiments were performed over a range of flow rate from 0.3-1.0 LPM and varied bed height of 0.5-2.0m. The results obtained also agree (BDST) model. In addition, for estimations of the parameters that are necessary for the design of a fixed bed adsorber in paractical application, the experimental data were fitted to the Thomas, Adams-Bohart, Yan and Yoon-Nelson models. Thomas model appeared to describe the experimental results well. Mathematical model was developed to simulate the concentration changes at the experimental time instances.

scholarly journals Study on Reactive Blue Adsorption on Raw and Modified Wheat Straw Using Fixed-Bed Column

2021 ◽  
Vol 24 (1) ◽  
pp. 1-7
Author(s):  
Alaa Taha ◽  
Khalid M. Mousa
Keyword(s):  
Wheat Straw ◽  
Adsorption Capacity ◽  
Flow Rate ◽  
Low Cost ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Blue Dye ◽  
Time Model ◽  
Fixed Bed Column ◽  
Bed Height

The intention of this study was to explore the efficiency and feasibility of adsorption of Reactive Blue dye (H3R) used in textile industries using Raw wheat straw (RWS) and Modified wheat straw (MWS) as a low-cost adsorbent. Wheat straw was modified using cationic surfactant (CTAB) to study the improvement of dye removal. The properties of Raw and Modified wheat straw are studied by means of Fourier transform infrared (FTIR) and scanning electron microscope (SEM) analyses to determine the functional groups and the nature of their surface. Continuous experiments were done by fixed-bed column to study the characteristics of the breakthrough curve using different bed heights and flow rates. Results showed that the breakthrough time increases with increasing bed height and decreasing flow rate, in turn results into higher removal capacity. Results also showed a higher flow rate lead a lower adsorption capacity due to insufficient residence time. Bed depth service time model (BDST), Adam-Bohart and Thomas models were used to predict the breakthrough curves and to determine the adsorption capacity of the column. The highest bed capacity of 12.95 and 32.2 mg/g for MWS was obtained using 10 mg/L, 10 cm bed height at 10 mL/min and 30 mL/min respectively.

Breakthrough analysis for hexavalent chromium removal from drinking water in a fixed bed column

2009 ◽  
Vol 9 (6) ◽  
pp. 661-670 ◽  
Author(s):  
S. P. Dubey ◽  
K. Gopal
Keyword(s):  
Aqueous Solution ◽  
Hexavalent Chromium ◽  
Fixed Bed ◽  
Entropy Change ◽  
Spectroscopic Technique ◽  
Fixed Bed Column ◽  
Chromium Vi ◽  
Fixed Bed Adsorption ◽  
Optimal Column ◽  
Eucalyptus Bark

The activated carbon of Eucalyptus globulus was tested for their effectiveness in removing hexavalent chromium from aqueous solution using column experiments. Result revealed that adsorption of chromium(VI) on eucalyptus bark carbon was endothermic in nature. Thermodynamic parameters such as the entropy change, enthalpy change and Gibbs free energy change were found to be 1.39 kJ mol−1 K−1, 1.08 kJ mol−1 and −3.85 kJ mol−1, respectively. Different chromium concentrations were used for the fixed bed adsorption studies. The pre- and post-treated adsorbents were characterized using a FTIR spectroscopic technique. It was concluded that Eucalyptus bark carbon column could be used effectively for removal of hexavalent chromium from aqueous solution at optimal column conditions. This study showed that this biological material is potential adsorbent of Cr(VI) from water.

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