Effect of ultrasound on biosorption kinetics of Acid blue 25 from aqueous media by using cycads palm bark as novel biosorbent

2021 ◽  
Vol 225 ◽  
pp. 413-421
Author(s):  
Sana Haou ◽  
El Khamssa Guechi ◽  
Soulef Benabdesselam ◽  
Oualid Hamdaoui
Keyword(s):  
Aqueous Media ◽  
Acid Blue 25 ◽  
Kinetics Of ◽  
Acid Blue ◽  
Biosorption Kinetics

Formal Bleaching Kinetics of Acid Blue 80 in Weakly Acidic, Neutral, and Basic Aqueous Media

2004 ◽  
Vol 74 (3) ◽  
pp. 376-378 ◽  
Author(s):  
A. Ya. Sychev'† ◽  
Zh. O. Anikina ◽  
T. V. Isaak ◽  
N. I. Tsyntsaru
Keyword(s):  
Aqueous Media ◽  
Kinetics Of ◽  
Acid Blue

scholarly journals Application of polyaniline/manganese dioxide composites for degradation of acid blue 25 by hydrogen peroxide in aqueous media

2012 ◽  
Vol 35 (4) ◽  
pp. 585-593 ◽  
Author(s):  
ALI H GEMEAY ◽  
REHAB G EL-SHARKAWY ◽  
IKHLAS A MANSOUR ◽  
AHMED B ZAKI
Keyword(s):  
Hydrogen Peroxide ◽  
Manganese Dioxide ◽  
Aqueous Media ◽  
Acid Blue 25 ◽  
Acid Blue

Amines modified fibers obtained from natural Populus tremula and their rapid biosorption of Acid Blue 25

2018 ◽  
Vol 250 ◽  
pp. 423-432 ◽  
Author(s):  
Najeh Tka ◽  
Mahjoub Jabli ◽  
Tawfik A. Saleh ◽  
Ghazwan Ali Salman
Keyword(s):  
Populus Tremula ◽  
Acid Blue 25 ◽  
Acid Blue

Study of kinetics of reaction of lignin model compounds with propylene oxide

Holzforschung ◽  
2008 ◽  
Vol 62 (2) ◽  
pp. 169-175 ◽  
Author(s):  
Krishna K. Pandey ◽  
Tapani Vuorinen
Keyword(s):  
Chemical Reaction ◽  
Propylene Oxide ◽  
Aqueous Media ◽  
Reaction Products ◽  
Model Compounds ◽  
Rapid Reduction ◽  
Visible Absorption ◽  
Lignin Model Compounds ◽  
Lignin Model ◽  
Kinetics Of

Abstract The etherification of phenolic groups has been found to inhibit photodegradation in wood and lignin rich pulps. The precise understanding of kinetics of chemical reaction between lignins or their model compounds and the etherifying agent is the first step for developing a viable modification procedure. In this study, we have investigated the reaction of lignin model compounds (namely, phenol and guaiacol) with propylene oxide in aqueous media. The kinetics of etherification reaction was studied under varying pH conditions in the temperature range 30–60°C. The etherified reaction products were characterized by gas chromatogram-mass spectrum (GC-MS). The extent of etherification of phenols and the rate of chemical reaction was followed by UV-Visible absorption spectroscopy. The reaction between lignin model compounds and propylene oxide was indicated by a rapid reduction in the absorbance accompanied by the development of a new band corresponding to etherified products. The reaction kinetics was investigated at pH ∼12 under the condition of excess concentration of propylene oxide. The reaction followed first order kinetics and rate constants increased linearly with an increase in the temperature and concentration of propylene oxide. The MS fragment data of reaction product support the proposed reaction scheme. The activation energy of the reaction of propylene oxide with phenol and guaiacol, calculated with the Arrhenius equation, was 56.2 kJ mol-1 and 45.4 kJ mol-1, respectively.

Effect of the Conditions of the Synthesis of Calcium Silicates on the Kinetics of Microbiological Treatment of Aqueous Media

2021 ◽  
Vol 66 (8) ◽  
pp. 1135-1140
Author(s):  
S. B. Yarusova ◽  
S. N. Somova ◽  
U. V. Kharchenko ◽  
P. S. Gordienko ◽  
I. A. Beleneva
Keyword(s):  
Aqueous Media ◽  
Calcium Silicates ◽  
Kinetics Of ◽  
Microbiological Treatment
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