Treatment of Printing and Dyeing Wastewater by Modified Montmorillonite
Meng-tao Wang,
You-li Feng,
Cong Wang,
Ning Mao
Issue:
Volume 6, Issue 3, June 2017
Pages:
37-41
Received:
31 March 2017
Accepted:
18 April 2017
Published:
3 June 2017
Abstract: The composition of printing and dyeing wastewater is very complex, which is characterized by high alkalinity, color depth, organic matter and more. At present, the commonly used method for treating printing and dyeing wastewater is expensive and the scope of use is limited. This article focuses on the study of montmorillonite. Through the modification of montmorillonite to greatly increase its adsorption performance, and the treatment of printing and dyeing wastewater has a significant effect. The validation of the experiment provides a better solution for the treatment of printing and dyeing wastewater.
Abstract: The composition of printing and dyeing wastewater is very complex, which is characterized by high alkalinity, color depth, organic matter and more. At present, the commonly used method for treating printing and dyeing wastewater is expensive and the scope of use is limited. This article focuses on the study of montmorillonite. Through the modificat...
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A Study of the Kinetics and Mechanism of Oxidation of Fluorene by Alkaline Hexacyanoferrate(III)
Ahmed Fawzy,
Rabab S. Jassas,
Saleh A. Ahmed,
Hazim M. Ali,
Nermeen S. Abbas,
Ishaq A. Zaafarany
Issue:
Volume 6, Issue 3, June 2017
Pages:
42-48
Received:
12 April 2017
Accepted:
21 April 2017
Published:
14 June 2017
Abstract: Kinetics of hexacyanoferrate (III) (HCF) oxidation of fluorene (Fl) in organic alkaline medium has been studied by spectrophotometric technique at a constant ionic strength of 0.15 mol dm-3 and at a temperature of 25°C. The reaction showed a first order kinetics with respect to [HCF] and fractional-first order dependences on both [Fl] and [OH-]. The oxidation rate was increased with the increase in the ionic strength of the reaction medium. The oxidation mechanism was suggested which involves formation of a 1:1 intermediate complex between fluorene and HCF species in a pre-equilibrium step. The final oxidation product of fluorene was identified by spectroscopic and chemical tools as 9H-fluorenone. The appropriate rate law expression was deduced and the reaction constants involved in the mechanism were evaluated. The activation parameters of the rate constant of the slow step along with the thermodynamic quantities of the equilibrium constants were evaluated and discussed.
Abstract: Kinetics of hexacyanoferrate (III) (HCF) oxidation of fluorene (Fl) in organic alkaline medium has been studied by spectrophotometric technique at a constant ionic strength of 0.15 mol dm-3 and at a temperature of 25°C. The reaction showed a first order kinetics with respect to [HCF] and fractional-first order dependences on both [Fl] and [OH-]. Th...
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