Statistical modelling of endocrine disrupting compounds adsorption onto activated carbon prepared from wood using CCD-RSM and DE hybrid evolutionary optimization framework: Comparison of linear vs non-linear isotherm and kinetic parameters

2020 ◽  
Vol 302 ◽  
pp. 112526 ◽  
Author(s):  
Mohammad Hadi Dehghani ◽  
Rama Rao Karri ◽  
Zeinab Tafaroji Yeganeh ◽  
Amir Hossein Mahvi ◽  
Heshmatollah Nourmoradi ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Kinetic Parameters ◽  
Endocrine Disrupting Compounds ◽  
Statistical Modelling ◽  
Evolutionary Optimization ◽  
Optimization Framework ◽  
Linear Isotherm ◽  
Endocrine Disrupting ◽  
Non Linear

Adsorption of 2,4-dinitrophenol on Activated Carbon Prepared from Cotton Cakes: Non-linear Isotherm Modeling

2018 ◽  
Vol 24 (1) ◽  
pp. 1-20 ◽  
Author(s):  
Bopda Aurelien ◽  
Tchuifon Tchuifon Donald Raoul ◽  
Nche George Ndifor-Angwafor ◽  
Kamdem Tamo Arnaud ◽  
Anagho Solomon Gabche
Keyword(s):  
Activated Carbon ◽  
Isotherm Modeling ◽  
Linear Isotherm ◽  
Non Linear

scholarly journals Non-linear Regression Analysis for the Adsorption Kinetics and Equilibrium Isotherm of Phenacetin onto Activated Carbons

2019 ◽  
pp. 1-18 ◽  
Author(s):  
Christian Sadeu Ngakou ◽  
Gabche Solomon Anagho ◽  
Horace Manga Ngomo
Keyword(s):  
Experimental Data ◽  
Activated Carbon ◽  
Activated Carbons ◽  
Linear Regression Analysis ◽  
Xrd Analysis ◽  
Strong Interactions ◽  
Isotherm Models ◽  
Linear Isotherm ◽  
Non Linear ◽  
Best Fit

Activated carbon obtained from ayous sawdust, Cucurbitaceae (egussi) peelings and the mixture of the two were studied for the adsorption of phenacetin. Characterisation of activated carbon by SEM and XRD analysis shows that the mixture of precursors combine the properties of activated carbon obtained separately. The well-knownbatch sorption models– Langmuir (one and two sites), Freudlich, Tempkin, Elovich, Langmuir-Freudlich, Redlich Peterson, Radke-Prausnitz, Fritz Shlunder)—were tested with experimental data for the adsorption of phenacetin to estimate adsorption equilibrium parameters—rate constantsand adsorption capacities. The model with the best fit was identified from extensive statistical analysis of the results of nonlinear regression of the experimental data. Comparison of the statistical errors in parameter estimation between linear and non-linear isotherm models shows that transformation of non-linear isotherm equations to linear forms implicitly alter their error structure. The much smaller size of the various error indicators —Determination Coefficient, R2; Sum of Square Errors, SSE; Chi Test, χ2; Average Relative Errors, ARE—, calculated for the case of non linearization when compared to linearization, indicate the greater accuracy in the application of non linearization. The Langmuir model (one site) gave the best fit and thus the values of adsorption capacity for each activated carbon were calculated from it. Kinetic models show that weak and strong interactions are involved in the adsorption process and that the controlling mechanism may not be limited to intra particle diffusion. The lower value of the boundary layer thickness in the case of activated carbon obtained from the mixture, justified the higher adsorbed quantity of this activated carbon compared to those of activated carbon from each precursor.

Adsorption of EDCs/PPCPs from drinking water by submicron-sized powdered activated carbon

2011 ◽  
Vol 11 (6) ◽  
pp. 711-718 ◽  
Author(s):  
Y. Wang ◽  
G. Y. Rao ◽  
J. Y. Hu
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Total Pore Volume ◽  
Endocrine Disrupting Compounds ◽  
Langmuir Equation ◽  
Powdered Activated Carbon ◽  
Maximum Adsorption Capacity ◽  
Endocrine Disrupting ◽  
Adsorption Processes ◽  
Pseudo Second Order

For the purpose of enhancing the adsorption of Endocrine Disrupting Compounds (EDCs) and Pharmaceuticals and Personal Care Products (PPCPs) from drinking water, commercially available powdered activated carbon (PAC, 40 μm) was further ground to produce submicron-sized powdered activated carbon (SPAC, 0.72 μm). Compared with PAC, the surface area and total pore volume of SPAC were improved. Kinetics data showed that the adsorption of EDCs/PPCPs by SPAC was faster than that by PAC. The adsorption processes of two target EDCs/PPCPs on both SPAC and PAC could be fitted by the pseudo-second order kinetics model. The Langmuir equation described the adsorption isotherm well and the maximum adsorption capacity of SPAC for bisphenol A and carbamazepine could be calculated as 320.54 and 133.33 μg/mg respectively.

Nanofiltration of endocrine disrupting compounds

2003 ◽  
Vol 3 (5-6) ◽  
pp. 321-327 ◽  
Author(s):  
M. Gallenkemper ◽  
T. Wintgens ◽  
T. Melin
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Endocrine Disrupting Compounds ◽  
Municipal Wastewater Treatment ◽  
Water And Wastewater Treatment ◽  
Wide Range ◽  
Endocrine Disrupting ◽  
Municipal Wastewater Treatment Plants ◽  
Set Up

Endocrine disrupting compounds can affect the hormone system in organisms. A wide range of endocrine disrupters were found in sewage and effluents of municipal wastewater treatment plants. Toxicological evaluations indicate that conventional wastewater treatment plants are not able to remove these substances sufficiently before disposing effluent into the environment. Membrane technology, which is proving to be an effective barrier to these substances, is the subject of this research. Nanofiltration provides high quality permeates in water and wastewater treatment. Eleven different nanofiltration membranes were tested in the laboratory set-up. The observed retention for nonylphenol (NP) and bisphenol A (BPA) ranged between 70% and 100%. The contact angle is an indicator for the hydrophobicity of a membrane, whose influence on the permeability and retention of NP was evident. The retention of BPA was found to be inversely proportional to the membrane permeability.

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