scholarly journals Sorption isotherms and kinetics of chromium uptake from wastewater using natural sorbent material

2008 ◽  
Vol 6 (1) ◽  
pp. 77-90 ◽  
Author(s):  
B. A. Shah ◽  
A. V. Shah ◽  
R. R. Singh
Keyword(s):  
Sorption Isotherms ◽  
Natural Sorbent ◽  
Sorbent Material ◽  
Kinetics Of ◽  
Chromium Uptake

scholarly journals Sorption isotherms and drying kinetics of grapefruit seeds - doi: 10.4025/actascitechnol.v35i4.13658

2013 ◽  
Vol 35 (4) ◽  
Author(s):  
Denis Cantu-Lozano ◽  
Juliane Viganó ◽  
Alejandro Alvarado Lassman ◽  
Norma Alejandra Vallejo Cantu ◽  
Javier Telis-Romero
Keyword(s):  
Sorption Isotherms ◽  
Drying Kinetics ◽  
Kinetics Of

scholarly journals Engineering Functionalized Chitosan-Based Sorbent Material: Characterization and Sorption of Toxic Elements

2019 ◽  
Vol 9 (23) ◽  
pp. 5138 ◽  
Author(s):  
Adnan Khan ◽  
Nisar Ali ◽  
Muhammad Bilal ◽  
Sumeet Malik ◽  
Syed Badshah ◽  
...  
Keyword(s):  
Experimental Data ◽  
Sorption Isotherms ◽  
Analytical Techniques ◽  
Aqueous Environment ◽  
X Ray Diffraction ◽  
Sorption Data ◽  
Regression Methods ◽  
Sorbent Material ◽  
Lead And Cadmium ◽  
Cadmium And Lead

The present study reports the engineering of functionalized chitosan (CH)-based biosorbent material. Herein, a two-step reaction was performed to chemically modify the CH using 1,4-bis(3-aminopropyl) piperazine to incorporate nitrogen basic centers for cations sorption from the aqueous environment. The resultant functionalized chitosan-based sorbent material was designated as CH-ANP and characterized using various analytical techniques, including elemental analysis, Fourier-transform infrared spectroscopy (FTIR), 13C NMR (in solid-state), X-ray diffraction, and thermal analysis. Then, the newly engineered CH-ANP was employed for the removal of copper, lead, and cadmium in the aqueous medium. Langmuir sorption isotherm analysis revealed that the highest sorption abilities achieved were 2.82, 1.96, and 1.60 mmol g−1 for copper, cadmium, and lead, respectively. Linear and nonlinear regression methods were deployed on the sorption data to study the behavior of the Langmuir, the Freundlich, and the Temkin sorption isotherms. Among the four different forms, the Langmuir isotherm type 1 fit well to the experimental data as compared to the other models. It also showed the lowest values of error, and a higher correlation coefficient than the Freundlich and Temkin models; thus it was the best fit with the experimental data compared to the latter two models. In conclusion, the findings suggest that chemically modified novel materials with enhanced Lewis basic centers are useful and promising candidates for the sorption of various toxic cations in aqueous solution.

Measurements of adsorption for membranes in situ with the use of time-lags and steady state flows

1979 ◽  
Vol 365 (1722) ◽  
pp. 267-281 ◽  
Keyword(s):  
Steady State ◽  
Standard Procedure ◽  
Time Lag ◽  
Sorption Isotherms ◽  
Time Lags ◽  
Carbon Membrane ◽  
Differential Diffusion ◽  
Use Of Time ◽  
Kinetics Of

Isotherms, steady state flows, the four time-lags, the kinetics of sorption and of the approach to the steady state of flow have been measured and analysed to investigate the properties of a graphitized carbon membrane. Sorption isotherms determined on the membrane in situ by a kinetic pro­cedure involving the time-lags and steady state flows were in agreement with isotherms determined by a standard procedure. Analysis of the time-lag and other results left the possibility of a small dependence of the diffusion coefficient, D , upon positional coordinate or upon time, but the dominant influence upon D was its dependence upon concentration, C . Differential diffusion coefficients increased very rapidly with C outside the range of the Henry law. Uptakes of diffusant in the steady state of flow, measured directly, through time-lag measurements and from steady state concentration contours across the membrane were in good agreement.

EXPERIMENTAL STUDY OF SORPTION ISOTHERMS AND DRYING KINETICS OF MOROCCANEUCALYPTUS GLOBULUS

2002 ◽  
Vol 20 (10) ◽  
pp. 2027-2039 ◽  
Author(s):  
M. Kouhila ◽  
N. Kechaou ◽  
M. Otmani ◽  
M. Fliyou ◽  
S. Lahsasni
Keyword(s):  
Experimental Study ◽  
Sorption Isotherms ◽  
Drying Kinetics ◽  
Kinetics Of

High-pressure sorption isotherms and sorption kinetics of CH4 and CO2 on coals

Fuel ◽  
2010 ◽  
Vol 89 (3) ◽  
pp. 569-580 ◽  
Author(s):  
Dongyong Li ◽  
Qinfu Liu ◽  
Philipp Weniger ◽  
Yves Gensterblum ◽  
Andreas Busch ◽  
...  
Keyword(s):  
High Pressure ◽  
Sorption Isotherms ◽  
Sorption Kinetics ◽  
Kinetics Of
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