Preparation and evaluation of kinetics and thermodynamics studies of lead adsorption onto chemically modified banana peels

2013 ◽  
Vol 51 (28-30) ◽  
pp. 5682-5691 ◽  
Author(s):  
C.L. Massocatto ◽  
E.C. Paschoal ◽  
N. Buzinaro ◽  
T.F. Oliveria ◽  
C.R.T. Tarley ◽  
...  
Keyword(s):  
Lead Adsorption ◽  
Kinetics And Thermodynamics ◽  
Chemically Modified ◽  
Preparation And Evaluation

scholarly journals Decoupling Kinetics and Thermodynamics of Interfacial Catalysis at a Chemically Modified Black Silicon Semiconductor Photoelectrode

2020 ◽  
Vol 5 (6) ◽  
pp. 1848-1855
Author(s):  
Caitlin M. Hanna ◽  
Ryan T. Pekarek ◽  
Elisa M. Miller ◽  
Jenny Y. Yang ◽  
Nathan R. Neale
Keyword(s):  
Black Silicon ◽  
Kinetics And Thermodynamics ◽  
Chemically Modified ◽  
Interfacial Catalysis

Chemically modified Retama raetam biomass as a new adsorbent for Pb(II) ions from aqueous solution: non-linear regression, kinetics and thermodynamics

2015 ◽  
Vol 4 (6) ◽  
Author(s):  
Ali Hashem ◽  
Hamdy A. Hammad ◽  
Alaauddin Al-Anwar
Keyword(s):  
Aqueous Solution ◽  
High Temperature ◽  
Linear Regression ◽  
Succinic Acid ◽  
Desert Plant ◽  
Kinetics And Thermodynamics ◽  
Chemically Modified ◽  
Retama Raetam ◽  
Non Linear

Abstract(RR), a desert plant, was chemically modified by the reaction with succinic acid at high temperature to form succinic acid treated

scholarly journals Removal of Pb from Water by Adsorption on Apple Pomace: Equilibrium, Kinetics, and Thermodynamics Studies

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Piar Chand ◽  
Yogesh B. Pakade
Keyword(s):  
Thermodynamic Parameters ◽  
Correlation Coefficient ◽  
Contact Time ◽  
Apple Pomace ◽  
Batch Adsorption ◽  
Kinetics Study ◽  
Lead Adsorption ◽  
Adsorption Study ◽  
Kinetics And Thermodynamics ◽  
Pseudo Second Order

The adsorption-influencing factors such as pH, dose, and time were optimized by batch adsorption study. A 0.8 g dose, 4.0 pH, and 80 min of contact time were optimized for maximum adsorption of Pb on AP. The adsorption isotherms (Langmuir and Freundlich) were well fitted to the data obtained with values ofqmax(16.39 mg/g;r2=0.985) andK(16.14 mg/g;r2=0.998), respectively. The kinetics study showed that lead adsorption follows the pseudo-second-order kinetics with correlation coefficient (r2) of 0.999 for all of the concentration range. FTIR spectra also showed that the major functional groups like polyphenols (–OH) and carbonyl (–CO) were responsible for Pb binding on AP. The thermodynamic parameters asΔG,ΔH(33.54 J/mol), andΔS(1.08 J/mol/K) were also studied and indicate that the reaction is feasible, endothermic, and spontaneous in nature.

Adsorption of heavy metal cadmium(II) ions using chemically modified corncob: mechanism, kinetics, and thermodynamics

2015 ◽  
Vol 57 (39) ◽  
pp. 18537-18550 ◽  
Author(s):  
Hai Lin ◽  
Jinmo Xu ◽  
Yingbo Dong ◽  
Liang Wang ◽  
Weijuan Xu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Kinetics And Thermodynamics ◽  
Chemically Modified

scholarly journals Kinetic Study of DNA Modification by Phthalocyanine Derivative of the Oligonucleotide

2006 ◽  
Vol 2006 ◽  
pp. 1-10 ◽  
Author(s):  
Alexandra A. Kuznetsova ◽  
Alexander A. Chernonosov ◽  
Nikita A. Kuznetsov ◽  
Vladimir V. Koval ◽  
Dmitri G. Knorre ◽  
...  
Keyword(s):  
Gene Expression ◽  
Hydrogen Peroxide ◽  
Transition Metal Complexes ◽  
Regulation Of Gene Expression ◽  
Dna Modification ◽  
Modified Oligonucleotides ◽  
Kinetics And Thermodynamics ◽  
Chemically Modified ◽  
Oxidation Of Organic Compounds ◽  
Reactive Groups

Design of chemically modified oligonucleotides for regulation of gene expression has attracted considerable attention over the last decades. One actively pursued approach involves antisense or antigene constructs carrying reactive groups, many of these based on transition metal complexes. The complexes of Co(II) with phthalocyanines are extremely good catalysts of oxidation of organic compounds with molecular oxygen and hydrogen peroxide. In this study, we have investigated the kinetics and thermodynamics of sequence-specific modification of DNA with deoxyribooligonucleotide linked to Co(II)-tetracarboxyphthalocyanine (PtcCo(II)) in the presence ofH2O2.

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