scholarly journals Rapid Adsorption of Copper(II) and Lead(II) by Rice Straw/Fe3O4 Nanocomposite: Optimization, Equilibrium Isotherms, and Adsorption Kinetics Study

PLoS ONE ◽  
2015 ◽  
Vol 10 (3) ◽  
pp. e0120264 ◽  
Author(s):  
Roshanak Khandanlou ◽  
Mansor B. Ahmad ◽  
Hamid Reza Fard Masoumi ◽  
Kamyar Shameli ◽  
Mahiran Basri ◽  
...  
Keyword(s):  
Rice Straw ◽  
Adsorption Kinetics ◽  
Kinetics Study ◽  
Equilibrium Isotherms ◽  
Rapid Adsorption

Amino-Functionalized Multi-Walled Carbon Nanotubes as Novel Adsorbents for Selective Adsorption of Anionic Dyes in Aqueous Solution

NANO ◽  
2015 ◽  
Vol 10 (05) ◽  
pp. 1550065 ◽  
Author(s):  
Hui Huang ◽  
Jingang Yu ◽  
Wei Liu ◽  
Xinyu Jiang
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Adsorption Kinetics ◽  
Organic Dyes ◽  
Selective Adsorption ◽  
Order Kinetic ◽  
Equilibrium Isotherms ◽  
Anionic Dyes ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In this study, amino-functionalized multi-walled carbon nanotubes ( MWCNTs - NH 2) were successfully synthesized via an improved method and used for removal of organic dyes in aqueous solution. The synthesized MWCNTs - NH 2 were characterized by Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscope (SEM), etc. The adsorption capacity and selectivity of MWCNTs - NH 2 for organic dyes was evaluated using rhodamine B ( RhB ), malachite green (MG), methyl orange (MO) and congo red (CR) as models. The selective adsorption toward anionic dyes was found for the MWCNTs - NH 2, and MO was selected as a typical anionic dye to deeply investigate the adsorption kinetics, equilibrium isotherms and thermodynamic parameters of the adsorption process. The adsorption kinetics and equilibrium isotherms data fitted well with the pseudo-second-order kinetic equation and Langmuir isotherm model. The thermodynamics study revealed that the adsorption of MO onto MWCNTs - NH 2 was spontaneous, exothermic and physisorptive in nature. The results indicated that MWCNTs - NH 2 are promising nanomaterials for removal of anionic dyes from industrial wastewater.

Combustion Process’s Kinetics Study of Biomass and its Cellulose Based on Biomaterials in Material Engineering

2012 ◽  
Vol 568 ◽  
pp. 328-331
Author(s):  
Chuan Cheng Zhang ◽  
Hai Jun Lu ◽  
Xiang He
Keyword(s):  
Rice Straw ◽  
Combustion Process ◽  
Order Reaction ◽  
Combustion Characteristics ◽  
First Order Reaction ◽  
Kinetics Study ◽  
Linear Rate ◽  
Isothermal Thermogravimetry ◽  
First Order ◽  
Dsc Curves

The combustion characteristics of some biomass samples, such as rice straw and its cellulose, were investigated. Non-isothermal thermogravimetry, where the sample was heated in air and the temperature of which increased at a linear rate of 10°C/min, 20°C/min, 30°C/min, was used to investigate combustion process of the biomass samples. The differences in the TG-DTG-DSC curves of the samples were determined and discussed in detail. Results showed that combustion process can be described in terms of first order reaction.

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