Adenosine-Functionalized UiO-66-NH2 to Efficiently Remove Pb(II) and Cr(VI) from Aqueous Solution: Thermodynamics, Kinetics and Isothermal adsorption

2021 ◽  
pp. 127771
Author(s):  
Hao Wang ◽  
Shuai Wang ◽  
Shixing Wang ◽  
Jiali Tang ◽  
Yingbi Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Solution Thermodynamics ◽  
Isothermal Adsorption

Biosorption of Textile Dye Red Bemacid ETL Using Activated Charcoal of Grape Marc (Oenological By-Product)

2019 ◽  
Vol 800 ◽  
pp. 151-156
Author(s):  
Yamina Chergui ◽  
Abdelkader Iddou ◽  
Hafida Hentit ◽  
Abdallah Aziz ◽  
Jean Claude Jumas
Keyword(s):  
Aqueous Solution ◽  
Zinc Chloride ◽  
Contact Time ◽  
Adsorption Mechanism ◽  
Activated Carbons ◽  
Batch Adsorption ◽  
Textile Dye ◽  
Isothermal Adsorption ◽  
Physical Methods ◽  
Grape Marc

The objective of this study was the synthesis of various activated carbons from grape marc issued from oenological by-product as a biosorbent. The biosolid was then applied to remove an industrial dye (red bemacid ETL) in aqueous solution. Activation of the synthesized charcoal was carried out using a solution of zinc chloride induced by two physical methods (microwaves and heating at 300°C). The obtained materials are characterized by FTIR and SEM methods. Results from batch adsorption tests have shown that pH solution, initial dye concentration and contact time affect the adsorption mechanism. Removal of the industrial dye revealed second order kinetics, exothermic adsorption and isothermal adsorption of BET type.

scholarly journals Application of hybrid bead, persimmon leaf and chitosan for the treatment of aqueous solution contaminated with toxic heavy metal ions

2018 ◽  
Vol 78 (4) ◽  
pp. 837-847 ◽  
Author(s):  
Sung-Whan Yu ◽  
Hee-Jeong Choi
Keyword(s):  
Heavy Metals ◽  
Aqueous Solution ◽  
Exothermic Reaction ◽  
Infrared Spectrometry ◽  
Maximum Adsorption Capacity ◽  
Toxic Heavy Metal ◽  
Isothermal Adsorption ◽  
Oh Groups ◽  
Ion Exchange Reaction ◽  
Persimmon Leaf

Abstract In this study, hybrid beads, which are made by mixing persimmon leaf and chitosan, was used to remove Pb(II) and Cd(II) from aqueous solution. According to the Fourier transform infrared spectrometry (FT-IR) analysis, the hybrid bead has a structure that enables the easy adsorption of heavy metals because it has carboxylic, carbonyl groups, O-H carboxylic acid, and bonded -OH groups. The adsorption of Pb(II) and Cd(II) by hybrid beads was more suitable with the Langmuir isothermal adsorption and showed an ion exchange reaction which occurred in the uneven adsorption surface layer. The maximum adsorption capacity of Pb(II) and Cd(II) was determined to be 278.68 mg/g and 87.91 mg/g, respectively. Furthermore, the adsorption removal process of Pb(II) and Cd(II) using hybrid beads is a spontaneous exothermic reaction and the affinity of the adsorbed material for the adsorbent is excellent. Hybrid beads are inexpensive, have a high removal efficiency of heavy metals, and are environmentally friendly.

The Adsorption Performance of Furfural Residue for Menthylene Blue

2012 ◽  
Vol 178-181 ◽  
pp. 433-436 ◽  
Author(s):  
Guang Jun Ren ◽  
Si Hao Li
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Mass Concentration ◽  
Isothermal Adsorption ◽  
Adsorption Performance ◽  
Furfural Residue ◽  
The Relationship

The adsorption performance of Menthylene blue from aqueous solution by furfural residue was studied. The results show that the adsorption of Menthylene blue on furfural residue reached equilibration by 60 minutes. The removal efficiency of Menthylene blue in aqueous solution on furfural residue of Menthylene blue achieved the 95.38% in 50mL 200mg.L-1 Menthylene blue aqueous solution with adding 4g/L furfural residue. The temperature had an effect on the removing of the Menthylene blue on furfural residue, and the adsorption of furfural residue to menthylene blue was decalescence reaction. The relationship between adsorbing capacity (qe) and equilibrium mass concentration (ρe) is in accordance with the isothermal adsorption equations of Freundlich and Langmuir.

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