A comprehensive study on the applicability of tea leaves and rice straw as novel sorbents for iron and manganese removal from running water in a fixed-bed column

2022 ◽  
Author(s):  
Allahyar Daghbandan ◽  
Behrooz Abbasi Souraki ◽  
Mohammad Akbari Zadeh
Keyword(s):  
Rice Straw ◽  
Fixed Bed ◽  
Tea Leaves ◽  
Fixed Bed Column ◽  
Running Water ◽  
Manganese Removal ◽  
Iron And Manganese ◽  
Comprehensive Study

scholarly journals Removal of iron and manganese from groundwater sources using nano-biosorbents

2022 ◽  
Vol 9 (1) ◽  
Author(s):  
Mohammad Akbari Zadeh ◽  
Allahyar Daghbandan ◽  
Behrouz Abbasi Souraki
Keyword(s):  
Particle Size ◽  
Rice Straw ◽  
Fixed Bed ◽  
Breakthrough Curves ◽  
Tea Leaves ◽  
Adsorption Column ◽  
Bet Analysis ◽  
Fixed Bed Adsorption ◽  
Fe And Mn ◽  
Iron And Manganese

Abstract Background The presence of iron (Fe) and manganese (Mn) ions in rocky beds leads to groundwater pollution. Moreover, their excessive concentration causes bad taste and color stains of water. Methods Tea leaves-derived char (TLC), rice straw-derived char (RSC), and nanosilica (NS) were used to adsorb Fe and Mn ions from water sources. The effects of parameters such as contact time, composition percentage, and particle size of biosorbents in a fixed-bed adsorption column were investigated. Results The study on the adsorption of Fe and Mn ions showed that the amount of adsorption increased significantly by decreasing the particle size. Furthermore, the combination of nano-biosorbents with nanosilica improved the adsorption. The Thomas and Adams–Bohart models adequately indicated the adsorption of Fe and Mn ions onto nano-biosorbents in the column mode. The TLC and RSC with NS are applicable for the removal of Fe and Mn ions from groundwater. Conclusions According to the BET analysis results, with more crushing of biosorbents by ball mill and placing them in the furnace, specific surface area of tea leaves and rice straw increased from 0.29 to 3.45 and from 3.70 to 10.99 m2/g, respectively. The absorption of iron and manganese from the aqueous solution increased with the percentage of nano-silica. According to breakthrough curves, under best conditions (the seventh mode), nano-biosorbents could remove 98.05% and 97.92% of iron and manganese ions, respectively. The maximum equilibrium capacity of the adsorption column (mg/g) was 256.56 for iron and 244.79 for manganese. Graphical abstract

scholarly journals Fixed-Bed Adsorption for the Removal of Iron and Manganese onto Palm Fruit Bunch and Maize Cob

2003 ◽  
Vol 21 (2) ◽  
pp. 161-175 ◽  
Author(s):  
Mamdouh M. Nassar ◽  
Kamal T. Awida ◽  
Ebrahiem E. Ebrahiem ◽  
Yehia H. Magdy ◽  
Mansour H. Mehaedi
Keyword(s):  
Fixed Bed ◽  
Solution Flow Rate ◽  
Time Model ◽  
Solution Flow ◽  
Palm Fruit ◽  
Fixed Bed Column ◽  
Fixed Bed Adsorption ◽  
Maize Cob ◽  
Time Required ◽  
Iron And Manganese

The sorption of iron and manganese onto palm fruit bunch and maize cob in a fixed-bed column was studied. The influence of process variables such as the bed height, the solution flow rate and the percentage breakthrough were investigated. The experimental results showed that the adsorbents used removed the studied metal ions effectively. The Bed Depth Service Time Model (BDST) was used to analyse the experimental data and identify design correlations. The Empty Bed Residence Time (EBRT) model, used for optimising the adsorbent exhaustion rate and the time required for influent to fill the column, was also considered.

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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