Investigation of Possible Antidotal Effects of Activated Charcoal, Sodium Bicarbonate, Hydrogen Peroxide and Potassium Permanganate in Zinc Phosphide Poisoning

Extracting indium from water quenching slag, which contains poor indium, by two process of leaching, the effect of different oxidants and dosages on the leaching rate of indium in water quenching slag were studied. The leaching conditions: temperature 80 °C, leaching time 2 h, the liquid to solid ratio of neutral leaching 8︰1, the liquid to solid ratio of acid leaching 2︰1, initial concentration of sulfuric acid 500 g·L-1, adding different oxidants, the concentration was detected by crystal violet spectrophotometry. Test results showed that the leaching rate of indium was significantly improved by adding hydrogen peroxide and potassium permanganate. Compared with the effect of different oxidants, the effect of potassium permanganate was significantly higher than that of hydrogen peroxide on the leaching rate of indium.

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A comparative analysis of in-office vital 6% hydrogen peroxide activated charcoal tooth whitening treatment enhanced with an 810nm diode laser, compared to 35% hydrogen peroxide bleaching

South African Dental Journal ◽

10.17159/2519-0105/2021/v76no2a1 ◽

2021 ◽

Vol 76 (2) ◽

pp. 64-71

Author(s):

Shabeer I Hassim ◽

Tufayl A Muslim

Keyword(s):

Hydrogen Peroxide ◽

Diode Laser ◽

Activated Charcoal ◽

Research Question ◽

Treatment Protocol ◽

Primary Data ◽

Absorption Enhancement ◽

Significance Level ◽

Peroxide Bleaching ◽

Bleaching Procedure

Laser dental bleaching is considered to be a contemporary approach to enhancing the in-office power bleaching procedure. Objective Investigate if laser enhanced 6% Hydrogen Peroxide (HP) solution is equivalent to 35% HP solution over a two-visit power bleaching treatment protocol. In a randomised double-blinded clinical trial, 43 patients were assigned to a group that received either the laser-enhanced 6% Hydrogen Peroxide (n=21) treatment, or the standard 35% Hydrogen Peroxide (n=22) treatment, over two visits, with a one-week interval. Activated charcoal HP paste was prepared for both groups. The laser enhanced 6% HP group received a dosage of 90 J/cm² per bleaching cycle using 810nm diode laser. Tooth colour was measured at the beginning and end of each session registering parameters L*, a* and b*, and tooth sensitivity. The calculated difference between these Parameters, ∆E, was the primary data focus. The mean ∆E over the treatment duration was used to answer the research question by a t-test to evaluate group differences at 5% significance level. The analysis revealed that the null hypothesis could not be rejected and the results were inconclusive. The observations expound the idea of an absorption enhancement mechanism, rather than a free radical activation, as the technique for improving bleaching outcomes.

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Highly Selective Oxidation of Cinnamaldehyde to Benzaldehyde by Hydrogen Peroxide in Mild Conditions

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.522-524.458 ◽

2014 ◽

Vol 522-524 ◽

pp. 458-464

Author(s):

Yuan Mei Nie ◽

Yong Peng An ◽

Cai Hua Peng ◽

Xing Dong Yao

Keyword(s):

Hydrogen Peroxide ◽

Hydrogen Bond ◽

Sodium Bicarbonate ◽

Propylene Glycol ◽

Selective Oxidation ◽

High Selectivity ◽

Protic Solvent ◽

Hydrogen Bond Interaction ◽

Mild Conditions ◽

Effect Of Solvent

Benzaldehyde was produced from oxidation of cinnamaldehyde by hydrogen peroxide in propylene glycol in the presence of sodium bicarbonate. Protic solvent demonstrated high selectivity and the yield of benzaldehyde could reach up to 82% in propylene glycol. The effect of solvent on the selectivity was attributed to hydrogen bond interaction between the oxidation intermediate epoxide and the solvent.

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