ADSORPTION, KINETICS, AND EQUILIBRIUM STUDIES ON REMOVAL OF 4,4-DDT FROM AQUEOUS SOLUTIONS USING LOW-COST ADSORBENTS

2009 ◽  
Vol 196 (12) ◽  
pp. 1547-1558 ◽  
Author(s):  
Rachdi Boussahel ◽  
Hassiba Irinislimane ◽  
Djamila Harik ◽  
Khadija Meriem Moussaoui
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Kinetics ◽  
Low Cost ◽  
Equilibrium Studies

Investigating the equilibrium and adsorption kinetics for the removal of Ni (II) ions from aqueous solutions using adsorbents prepared from the modified waste newspapers: A low-cost and available adsorbent

2019 ◽  
Vol 146 ◽  
pp. 1043-1053 ◽  
Author(s):  
Mohammad Hadi Dehghani ◽  
Mohammad Sarmadi ◽  
Mohammad Reza Alipour ◽  
Daryoush Sanaei ◽  
Hamid Abdolmaleki ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Kinetics ◽  
Low Cost

scholarly journals Sorption of cationic dyes from aqueous solutions by moss Rhytidiadelphus squarrosus: Kinetics and equilibrium studies

2021 ◽  
Vol 9 (1) ◽  
pp. 53-62
Author(s):  
Lucia Remenárová ◽  
Martin Pipíška ◽  
Miroslav Horník ◽  
Jozef Augustín
Keyword(s):  
Aqueous Solutions ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Cationic Dyes ◽  
Order Kinetic ◽  
Natural Sorbent ◽  
Equilibrium Studies ◽  
Sorption Data ◽  
Maximum Sorption ◽  
Rhytidiadelphus Squarrosus

With the aim to investigate sorption properties of natural sorbent prepared from moss Rhytidiadelphus squarrosus we elucidated biosorption of cationic dyes Malachite green (BG4), Auramine O (BY2) and Thioflavine T (BY1) from aqueous solutions. The removal of dyes by moss biosorbent was found to be rapid at an initial stage and the equilibrium was reached within 1-2 hours. The pseudo-n-order kinetic model was successfully applied to the kinetic data and the order of adsorption reaction was calculated in the range from 1.7 to 2.6. The value of rate constant kn' ranged from 0.001 to 0.039 [min-1]/[μmol/g]1-n. The equilibrium data were fitted to the adsorption isotherms. The Freundlich isotherm was found to represent the measured sorption data of BG4, BY1 and BY2 well. The maximum sorption capacities of moss biomass from single dye solutions calculated by Langmuir equation were 354 μmol/g for BG4, 310 μmol/g for BY1 and 382 μmol/g for BY2. These results showed that the prepared biomass presents low-cost, natural and easy available sorbent which may be potentially used for removal of dyes from environment and also may be an alternative to more costly materials such as activated carbon.

scholarly journals Adsorption of nitrate onto biochar derived from agricultural residuals

2017 ◽  
Vol 77 (2) ◽  
pp. 548-554 ◽  
Author(s):  
Haihua Zhao ◽  
Yingwen Xue ◽  
Li Long ◽  
Xiaolan Hu
Keyword(s):  
Thermal Stability ◽  
Aqueous Solutions ◽  
Porous Structure ◽  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Low Cost ◽  
Batch Adsorption ◽  
Surface Functional Groups ◽  
Good Thermal Stability ◽  
Langmuir Adsorption

Abstract To develop low-cost adsorbents for aqueous nitrate, biochars were prepared from three types of agricultural residuals at different pyrolysis temperatures (300 °C, 450 °C, and 600 °C). The corncob biochar produced at 600 °C (CC600) was the best nitrate adsorbent of all the tested biochars. Characterization results showed that CC600 had good thermal stability, porous structure, and abundant surface functional groups. Findings from batch adsorption experiments demonstrated that CC600 showed relatively fast adsorption kinetics to nitrate in aqueous solutions. In addition, the Langmuir adsorption capacity of CC600 to nitrate was 14.46 mg/g, comparable to that of other biochar-based adsorbents. Therefore, CC600 showed promising potential to be used as a low-cost adsorbent for the treatment of nitrate in water.

Enhanced Congo red dye removal from aqueous solutions using iron nanoparticles: adsorption, kinetics, and equilibrium studies

2017 ◽  
Vol 46 (44) ◽  
pp. 15470-15479 ◽  
Author(s):  
Se-Ho Kim ◽  
Pyuck-Pa Choi
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Congo Red ◽  
Iron Nanoparticles ◽  
Dye Removal ◽  
Ambient Conditions ◽  
Equilibrium Studies ◽  
Amorphous Iron ◽  
Red Dye

Congo red adsorption tests reveal that the highest adsorption capacity (1735 mg g−1) is achieved for amorphous iron nanoparticles synthesized under ambient conditions.

Competitive Sorption of Pb, Cd, and Ni on Chicken Feathers from Binary Aqueous Solutions

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Hilda Elizabeth Reynel-Avila ◽  
Adrian Bonilla-Petriciolet ◽  
Guadalupe de la Rosa
Keyword(s):  
Experimental Data ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Low Cost ◽  
Competitive Sorption ◽  
Equilibrium Studies ◽  
Sorption Data ◽  
Competitive Effects ◽  
Chicken Feathers ◽  
Isotherm Equations

In this paper, we report the competitive removal of Pb, Cd, and Ni ions from binary metal solutions using chicken feathers. These heavy metals are very toxic for human being and are present in wastewaters of several industrial activities. Therefore, multi-component sorption studies are required to identify the capabilities and limitations of chicken feathers as low-cost sorbent for the simultaneous removal of these metal ions from wastewaters. To the best of our knowledge, sorption equilibrium studies involving chicken feathers and Pb, Cd, and Ni in binary aqueous solutions have not been reported. Therefore, the binary sorption data for systems Pb - Cd, Pb – Ni, and Cd - Ni at different pH conditions are reported in this paper. Our experimental data are modeled using multi-component isotherm equations and desorption studies were also performed. In summary, this study provides new experimental data to identify the competitive effects of these metal ions onto the multi-component sorption performance of chicken feathers.

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