Oscillations of bromine in Belousov-Zhabotinskii type reaction with oxalic acid

The authors studied the influence of the concentrations of reactants and catalysts on the parameters of the catalysed oscillation reaction of bromate ions with oxalic acid in the medium of sulphuric acid. Ce(IV) and Mn(III) ions induce the reaction of bromine in the oxidation state either +1 or 0 with oxalic acid. In the presence of bromate ions, the induced reaction can lead to the formation of the same quantity of bromine as in the first oscillation cycle of the oscillation reaction.

Download Full-text

Influence of substrate on modified oscillation reactions of the Belousov-Zhabotinskii type

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19833223 ◽

1983 ◽

Vol 48 (11) ◽

pp. 3223-3228 ◽

Cited By ~ 2

Author(s):

Peter Ševčík ◽

Ľubica Adamčíková

Keyword(s):

Oxalic Acid ◽

Kinetic Parameters ◽

Tartaric Acid ◽

Bz Reaction ◽

Oscillation Cycle ◽

Influence Of Substrate

The kinetic parameters of the reaction steps of the oscillation cycle and the parameters of modified oscillation reactions of the Belousov-Zhabotinskii (BZ) type with oxalic acid, tartaric acid, and hypophosphite ions were compared with predictions of Edelson's analysis based on the mechanism of the classical BZ reaction.

Download Full-text

Dissolution of Mixed Zinc-Carbon and Alkaline Battery Powders in Sulphuric Acid Using Ascorbic/Oxalic Acid as a Reductant

EPD Congress 2012 ◽

10.1002/9781118359341.ch32 ◽

2012 ◽

pp. 271-287

Author(s):

Muammer Kaya ◽

Sait Kursunoglu

Keyword(s):

Oxalic Acid ◽

Sulphuric Acid ◽

Alkaline Battery

Download Full-text

Phosphorus recovery from the sludge generated from a continuous bipolar mode electrocoagulation (CBME) system

Water Science & Technology ◽

10.2166/wst.2019.131 ◽

2019 ◽

Vol 79 (7) ◽

pp. 1348-1356 ◽

Cited By ~ 1

Author(s):

M. Damaraju ◽

H. Yoshihara ◽

D. Bhattacharyya ◽

T. K. Panda ◽

K. K. Kurilla

Keyword(s):

Oxalic Acid ◽

Sulphuric Acid ◽

Acid Leaching ◽

Renewable Resource ◽

Phosphorus Recovery ◽

Raw Material ◽

Time Intervals ◽

Operational Conditions ◽

Bipolar Mode ◽

Palm Oil Mill

Abstract Phosphorus is known to be a limited non-renewable resource. Phosphorus is obtained from phosphate rock, which is likely to be depleted in the next few decades. Therefore, it is very important to find alternate sources of phosphorus from which phosphorus can be recycled and recovered. This study focuses on the recovery of phosphorus from the sludge generated from a continuous bipolar mode electrocoagulation (CBME) system, used for treating a palm oil mill effluent (POME). The sludge generated from the CBME system is leached with oxalic acid and sulphuric acid for phosphorus recovery with and without thermal treatment. Acid leaching was carried out at various time intervals using various liquid/solid (L/S) ratios of acids and sludge. The CBME system caused a 73% removal of phosphorus from POME, where phosphorus is precipitated in sludge as iron phosphates or adsorbed as phosphates depending on the pH in the system. Acid leaching resulted in nearly 85% recovery of phosphorus with both sulphuric acid and oxalic acid for sludge combusted at 900 °C. Statistical analysis was carried out to find the significance of the operational conditions on the phosphorus yield. Acid leaching results in the formation of orthophosphates, which can be used as a raw material for synthesis of chemical fertilizers.

Download Full-text