Adsorption and Desorption Performance of Dichloromethane over Activated Carbons Modified by Metal Ions

2013 ◽  
Vol 58 (9) ◽  
pp. 2449-2454 ◽  
Author(s):  
Hongyan Pan ◽  
Min Tian ◽  
Hui Zhang ◽  
Yu Zhang ◽  
Qian Lin
Keyword(s):  
Metal Ions ◽  
Activated Carbons ◽  
Adsorption And Desorption ◽  
Adsorption And Desorption Performance

Thermo-kinetic investigation of heavy metal ions adsorption onto lignin considering coupled adsorption–desorption mechanisms: Modeling and experimental validation

2018 ◽  
Vol 09 (02) ◽  
pp. 1850014
Author(s):  
Farnaz Seyedvakili ◽  
Mohammad Samipoorgiri
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Individual Characteristics ◽  
Adsorption And Desorption ◽  
Isotherm Equation ◽  
Proposed Model ◽  
Isotherm And Kinetic Models ◽  
The Individual ◽  
Adsorption Desorption

A coupled adsorption–desorption thermo-kinetic model is developed incorporating both adsorption and desorption reactions. A local pseudo-equilibrium condition at the interface of adsorbent and adsorbate bulk phases was used as isotherm equation which can even be applied for multi-pollutants scenarios. The developed model is then validated using collected experimental data of heavy metal ions (Pb, Cu, Cd, Zn, and Ni). Comparisons were made for a number of isotherm and kinetic models to examine the performance of the proposed model. The developed model revealed desirable accuracy and superiority over other models in predicting the adsorption behavior and can be used for other systems of concern. The model correlates the adsorption kinetic with an [Formula: see text] value of 0.9391 and desorption kinetic with an [Formula: see text] value of 0.9383. By application of the proposed model to any available adsorption datasets, the individual characteristics of adsorption and desorption can be determined.

Adsorption of Soluble Metal Ions from Red Mud by Modified Activated Carbon

2008 ◽  
Vol 368-372 ◽  
pp. 1541-1544 ◽  
Author(s):  
Hua Lei Zhou ◽  
Dong Yan Li ◽  
Guo Zhuo Gong ◽  
Ya Jun Tian ◽  
Yun Fa Chen
Keyword(s):  
Activated Carbon ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Red Mud ◽  
Activated Carbons ◽  
Valuable Metal ◽  
Surface Areas ◽  
Alumina Industry ◽  
Modified Activated Carbons ◽  
Almost All

Activated carbon was employed as the adsorption carrier for the metal ions in HCl solution of red mud, a solid waste produced in alumina industry. To improve the adsorption capacity to valuable metal ions, the activated carbon was modified by chemicals including HNO3, H2O2, H2SO4, H3PO4, NH3, Na2CO3, and tri-butyl phosphate (TBP). It was found that the modifications contributed the high adsorption capacity to almost all metal ions we focused on. In the case of TBP, remarkably higher adsorption capacity and selectivity of Sc3+ was observed. The correlation between the surface areas, IR spectra of those chemically modified activated carbons and adsorption was schemed.

scholarly journals Enhanced uptake capacities and isosteric heats of CO2and CH4adsorption onspent coffee ground activated carbons loaded with metal ions

2019 ◽  
Vol 43 (3) ◽  
pp. 948-962
Author(s):  
Çisem KIRBIYIK ◽  
Burak Zafer BÜYÜKBEKAR ◽  
Mahmut KUŞ ◽  
Mustafa ERSÖZ
Keyword(s):  
Metal Ions ◽  
Activated Carbons ◽  
Coffee Ground

scholarly journals Optimizing spatial pore-size and porosity distributions of adsorbents for enhanced adsorption and desorption performance

2015 ◽  
Vol 132 ◽  
pp. 108-117 ◽  
Author(s):  
Guanghua Ye ◽  
Xuezhi Duan ◽  
Kake Zhu ◽  
Xinggui Zhou ◽  
Marc-Olivier Coppens ◽  
...  
Keyword(s):  
Pore Size ◽  
Adsorption And Desorption ◽  
Enhanced Adsorption ◽  
Adsorption And Desorption Performance

Adsorptive removal of heavy metal ions by activated carbons

TANSO ◽  
2011 ◽  
Vol 2011 (247) ◽  
pp. 62-69 ◽  
Author(s):  
Motoi Machida ◽  
Yoshimasa Amano ◽  
Masami Aikawa
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Activated Carbons ◽  
Adsorptive Removal

Characterization of Nanosilica of Tapioca Peel as Adsorbent for Biomethane Storage System

2015 ◽  
Vol 1125 ◽  
pp. 266-270
Author(s):  
Hasnizah binti Habibun ◽  
Shareena Fairuz binti Abdul Manaf ◽  
Nur Hashimah Alias ◽  
Nur Shahidah Ab Aziz ◽  
Fazlena Hamzah
Keyword(s):  
Physical Properties ◽  
Metal Oxides ◽  
Surface Area ◽  
Storage System ◽  
Physical Structure ◽  
Area Measurement ◽  
Bet Surface Area ◽  
X Ray Diffraction ◽  
Adsorption And Desorption ◽  
Adsorption And Desorption Performance

Biomethane is an alternative and renewable source that occurred naturally which produced from the anaerobic digestion of organic matter. It can be used as the electricity power generation, water heating and also vehicle fuel. In this study, the characteristics of the nanosilica of the tapioca peel as an adsorbent on the structural and physical properties to store the biomethane were investigated. To enhance the adsorption and desorption performance as well as the structural and physical properties, the nanosilica was modified with the metal oxides. The metal oxides that have been used to modify the nanosilica adsorbent are zinc (II) oxide (ZnO) and nickel (II) oxide (NiO). Both of the modified and unmodified nanosilica structural properties were characterized by using X-Ray Diffraction (XRD) and Scanning Electron Microscope (SEM). While, the physical properties of both of the modified and unmodified nanosilica were characterized by using Brunauer, Emmet, Teller (BET) surface area measurement. The effects of both types of metal oxides with different concentration were investigated. Based on the results obtained, the structural and physical characteristics of the nanosilica were affected by the different metal oxides loading. It have been identified that 1% ZnO modified nanosilica has highest BET surface area (8.32 m2/g) with pore volume (19.23 cc/g) and pore size (82.8 nm). Thus, it concluded that 1% ZnO modified nanosilica improved the structural and physical structure. Hence, it enhances the capacity of methane adsorption and desorption prior to storage system.

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