Biosorption of Reactive Red 120 dye from aqueous solution using Saccharomyces cerevisiae: RSM analysis, isotherms and kinetic studies

2019 ◽  
Vol 171 ◽  
pp. 418-427 ◽  
Author(s):  
Aliasghar Navaei ◽  
Mohsen Yazdani ◽  
Hossein Alidadi ◽  
Mahmoud Dankoob ◽  
Ziaeddin Bonyadi ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Aqueous Solution ◽  
Kinetic Studies ◽  
Reactive Red 120

Equilibrium, Thermodynamic, and Kinetic Studies on Lead (II) Biosorption from Aqueous Solution by Saccharomyces cerevisiae Biomass

2010 ◽  
Vol 38 (9) ◽  
pp. 877-885 ◽  
Author(s):  
Mehrorang Ghaedi ◽  
Gholam Reza Ghezelbash ◽  
Farzaneh Marahel ◽  
Shiva Ehsanipour ◽  
Asma Najibi ◽  
...  
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Aqueous Solution ◽  
Kinetic Studies ◽  
Equilibrium Thermodynamic

Micellar catalysis of organic reactions. VIII. Kinetic studies of the hydrolysis of 2-acetyloxybenzoic acid (aspirin) in the presence of micelles

1982 ◽  
Vol 35 (7) ◽  
pp. 1357 ◽  
Author(s):  
TJ Broxton
Keyword(s):  
Aqueous Solution ◽  
Cetyltrimethylammonium Bromide ◽  
Cetylpyridinium Chloride ◽  
Kinetic Studies ◽  
Base Catalysis ◽  
Plateau Region ◽  
General Base ◽  
Mechanism Of Hydrolysis ◽  
Ph Range ◽  
Hydrolysis Of

The hydrolysis of 2-acetyloxybenzoic acid in the pH range 6-12 has been studied in the presence of micelles of cetyltrimethylammonium bromide (ctab) and cetylpyridinium chloride (cpc). In the plateau region (pH 6-8) the hydrolysis is inhibited by the presence of micelles, while in the region where the normal BAC2 hydrolysis (pH > 9) occurs the reaction is catalysed by micelles of ctab and cpc. The mechanism of hydrolysis in the plateau region is shown to involve general base catalysis by the adjacent ionized carboxy group both in the presence and absence of micelles. This reaction is inhibited in the presence of micelles because the substrate molecules are solubilized into the micelle and water is less available in this environment than in normal aqueous solution.

scholarly journals Stability of Indomethacin in Aqueous Solution. (1): Kinetic Studies and Effect of Solvents on the Hydrolysis of Indomethacin.

1992 ◽  
Vol 18 (1) ◽  
pp. 43-51 ◽  
Author(s):  
KAORU CHIBA ◽  
MASANAO TAKAHASHI ◽  
NOBUMASA HAYASE ◽  
SHIGETAKA AKUTSU ◽  
SHUNICHI INAGAKI
Keyword(s):  
Aqueous Solution ◽  
Kinetic Studies ◽  
Effect Of Solvents ◽  
Hydrolysis Of

scholarly journals Organic Dyes Adsorption on the Almond Shell (Prunus dulcis) as Agricultural Solid Waste from Aqueous Solution in Single and Binary Mixture Systems

2021 ◽  
Vol 12 (2) ◽  
pp. 2022-2040
Keyword(s):  
Aqueous Solution ◽  
Binary Mixture ◽  
Contact Time ◽  
Binary Systems ◽  
Organic Dyes ◽  
Low Cost ◽  
Kinetic Studies ◽  
Prunus Dulcis ◽  
Order Kinetic ◽  
Almond Shell

Almond shell (AS) is a low-cost adsorbent used in this study for the removal of methylene blue (MB), crystal violet (CV), and Congo red (CR) from an aqueous solution in single and mixture binary systems. The low-cost adsorbent was characterized by FTIR and SEM analysis. The effects of AS dose, contact time, initial dye concentration, pH, and temperature on MB, CV, and CR adsorption were studied in a single system. In a binary system, the MB, CV, and CR were removed from the mixture of MB+CR, CV+MB, and CV+CR with a percentage in volume ranging from 0 to 100 % in MB and CV, and CR. Kinetic studies showed rapid sorption following a second-order kinetic model with of contact time of 10 min. The modulation of adsorption isotherms showed that retention follows the Langmuir model. The thermodynamic parameters proved that the MB, CV, and CR adsorption process was feasible, spontaneous, and exothermic. The synergy adsorption between dyes in a binary mixture of MB+CR and CV+CR, while the competition adsorption between dyes in a binary mixture of MB+ CV.

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