Stability of Concentrated Hydrogen Peroxide Solutions

Schumb, Walter C.

doi:10.1021/ie50473a026

Cited by 52 publications

(27 citation statements)

References 5 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, less substrate is decomposed. Schumb (1949) reported that the decomposition rate of H 2 O 2 reaches the maximum at pH 3.5. With the progressive hydrolysis of ferric ions, the hydrolysis product provides a relatively large catalytically active surface for contact with H 2 O 2 .…”

Section: +mentioning

confidence: 99%

Electrochemical Processes for In-Situ Treatment of Contaminated Soils - Final Report - 09/15/1996 - 01/31/2001

Huang¹

2001

View full text Add to dashboard Cite

Contamination of soils by toxic organic pollutants is an environmental concern. The insitu electrokinetic (EK) technology is an emerging process to remediate the contaminated soils. Since the electro-osmotic (EO) flow rate and sorption behaviors of pollutants are two critical factors of the process, this study focuses on understanding the partition of nonionic organic contaminants in soil-water system, mechanisms of the EO flow, and the transport of organic compounds under an externally applied electrostatic field. The target compounds include chlorinated organic compounds and polycyclic aromatic hydrocarbons (PAHs). In order to improve the treatment efficiency, surfactant and bio-surfactant were used. A thermodynamic concept, fugacity, was introduced to illustrate the interactions between organics and the soil. A semi-empirical equation was derived to describe the EO flow rate in unsaturated soils. Moverover, the diffusion-advection-sorption model was used to simulate the transport of nonionic organic contaminants in the presence of an electrostatic field.The sorption experiments were conducted with various initial solute concentrations and different soil to solution ratios. The selected chlorinated organics include tetrachloroethylene (PCE), trichloroethylene (TCE), carbon tetrachloride, and chloroform. Results show that Langnuir isotherm can be used to express the distribution behavior of these chlorinated organic compounds i n the soil-water system. In addition to the hydrophobicity (K ow ), the concentration of organic compound and soil to solution ratio can influence the distribution behavior also. In order to illustrate the effects of the organic concentration and soil to solution ratio, the activity coefficient was used.The activity coefficient, γ, a relative interaction based on chosen reference state, is a useful means to express the quantitative feature of the organic-soil interaction without detailed information of their interaction mechanisms. By comparing the activity coefficients, γ w and γ s (i.e., X s /X w ), one can illustrate the trend of organic distribution at the soil-water interfaces.The concentration effect can be explained by the changes in the adsorption of organic onto the soil surface. Based on the experimental results, when increasing the organic compound concentrations, the activity coefficient, γ w , can be considered as a constant and γ s increases due to the increase of interaction energy. The change of γ s makes the sorption isotherms of PCE, TCE, carbon tetrachloride, and chloroform non-linear. According to γ s , it can be seen that the sorption between these selceted chlorinated organics and the soil is exothermic.The effect of soil to solution ratio can be attributed to the presence of dissolved organic matter (DOM) in the liquid phase. DOM enhances the organic dissolution, which in turns increases the organic concentration, i.e., X w . Therefore, the partition coefficients of these chlorinated compounds, i.e., X s /X w , decrease with increasing the soil to solution ...

show abstract

Section: +mentioning

confidence: 99%

Electrochemical Processes for In-Situ Treatment of Contaminated Soils - Final Report - 09/15/1996 - 01/31/2001

Huang¹

2001

View full text Add to dashboard Cite

show abstract

“…Thk p:eset "rark I l-oed that very small tameown, o slsmims blieresned bort the deeompl•ain rate -SP-90 and the solut in rate of th, Mvlwr catalyst. Altemeh tese phsveno as were observed at aluminum CONFIDENTIAL CC*W'P!DUWT#AL NAVAL 1VSSARCH tAGORAOUVT 13 concentrations up to 0.5 mg/l, no significant change was observed sbov* tisa value. " daa tor the starting Activity plotte~d in rig.…”

Section: Risnaich Lanomaton? Coirt1dentialmentioning

confidence: 88%

The Role of Inorganic Contaminants in the Catalytic Decomposition of Hydrogen Peroxide

Hazlett¹

1958

View full text Add to dashboard Cite

“…The temperature coefficient "a" has been found to have a value of 2.2 ± 0.1 over the range 500 to 90 0 C (8). This indicates that the rate more than doubles for each 10 0 C rise in temperature, or increases about fifty-fold for the interval 500 to 100 0 C. Some typical decomposition data for 90% hydrogen p.eroxide are given in Table 1 (7,8).…”

Section: Decomposition Ratesmentioning

confidence: 98%

“…In the presence of a small quantity of stabilizer this value may be reduced to 0.0003% per hour at 50 0 C (3,8).…”

Section: Decomposition Ratesmentioning

confidence: 99%

Hydrogen Peroxide Tank Safety

Hazlett¹,

Stone²,

Hall³

1974

View full text Add to dashboard Cite

Stability of Concentrated Hydrogen Peroxide Solutions

Cited by 52 publications

References 5 publications

Electrochemical Processes for In-Situ Treatment of Contaminated Soils - Final Report - 09/15/1996 - 01/31/2001

Electrochemical Processes for In-Situ Treatment of Contaminated Soils - Final Report - 09/15/1996 - 01/31/2001

The Role of Inorganic Contaminants in the Catalytic Decomposition of Hydrogen Peroxide

Hydrogen Peroxide Tank Safety

Contact Info

Product

Resources

About