Volumetric Determination of Persulfate in Presence of Organic Substances

Kolthoff, I. M.; Carr, E. M.

doi:10.1021/ac60074a024

Cited by 126 publications

(48 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ka value was calculated from the slope of the latter good linear relationship. For the comparison, we also estimated the amounts of KPS in 10 ml of the solution by the iodometric method according to the procedure of i.o Kolthoff et al [6] and have displayed the results simultaneously in Fig. 2.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

An isotachophoresis for the microdetermination of potassium persulphate as initiator in emulsion polymerization

Okubo

Mori

1988

Colloid & Polymer Sci

View full text Add to dashboard Cite

An isotachophoresis (IP) was applied to determine the decompositio n rate of potassium persulphate (KPS) as initiator in emulsion polymerization, in comparison with conventional iodometry and ferrometry. For the exact determination, the latter methods needed several milliliters of the emulsion pipetted from the polymerization system, whereas IP did only a few microliters. Moreover, the amount of sulphuric acid produced as the decomposition by-product was simultaneously determined by IP, which is impossible for iodometry and ferrometry.

show abstract

Section: Resultsmentioning

confidence: 99%

“…For the comparison, the ferrometric method ~ 0.s according to the procedure of Kolthoff et al [6] was "-…”

Section: Resultsmentioning

confidence: 99%

An isotachophoresis for the microdetermination of potassium persulphate as initiator in emulsion polymerization

Okubo

Mori

1988

Colloid & Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Dissolved ferrous iron and dissolved total iron were spectrophotometrically measured in accordance with ISO 6332:1988. The evaluation of persulfate consumption was performed through iodometric titration of the residual persulfate in solution at the end of each run (Kolthoff and Carr 1953).…”

Section: Chemicals and Analytical Methodsmentioning

confidence: 99%

Lab-scale feasibility tests for sediment treatment using different physico-chemical techniques

et al. 2009

View full text Add to dashboard Cite

The fairly high amounts of sediments dredged in coastal or internal water bodies for navigational and/or environmental purposes claims for the identification of appropriate management strategies. Dredged sediments are frequently affected by organic and inorganic contamination, so that their reuse, as an alternative to final landfill disposal, could need remediation. In this framework, a two-year joint research project was carried out to assess the feasibility of different remediation technologies for the treatment of polluted sediments. The sediment used in this study was similar in composition and contaminant loading to many sediments around the world. It was dredged from the northern canal of the Porto Marghera industrial area (Venice, Italy) and it was homogenized and characterized for the physical properties and chemical composition. The material was found to exceed the regulatory limits established for the reuse of dredged materials in the Venice lagoon for a wide range of pollutants, but this study specifically focused on heavy metals and polycyclic aromatic hydrocarbons (PAHs). Homogeneous samples were subjected to a number of physico-chemical remediation techniques including chemical oxidation, electrochemical oxidation, and electrokinetics under different operating conditions. The treated material was characterized for the residual contaminants in order to determine the remediation efficiency. The treatments investigated produced a variety of effects in terms of removal of heavy metals and PAHs. For total PAHs, the best results were obtained using H2O2 only as the oxidizing agent (45% removal), and chemically + thermally activated persulfate (up to 72% removal). The kinetics of these chemical oxidation processes was rapid and almost complete in a few hours. Electrooxidation produced up to 44% of total PAHs degradation, whereas no appreciable PAH removal was attained by the electrokinetic treatment. Metal extraction by means of electrokinetics was the highest when both the anodic and the cathodic chambers were conditioned with the complexing agent ethylenediamine tetraacetic acid (EDTA). The following removal yields were obtained: 81% for As, 69% for Cr, 40% for Cu, 33% for Pb, and 22% for Zn. The modified Fenton-like reactants were not capable of improving the PAH removal compared to the conventional H2O2-based oxidation process; as a consequence, the latter should be suggested. Comparable PAH removals were obtained using the electrooxidation treatment, whereas the activated persulfate treatment exhibited the highest removal efficiency. Electrokinetics was found to be effective towards heavy metal mobilization only when the process was enhanced by EDTA. Specific modifications should be applied to the electrokinetics treatment to enhance the PAH remediation yield, such as enhancement of the electroosmotic flow in order to achieve a higher liquid to solid ratio; for metals, performance might be optimized by using an EDTA solution as the catholyte and an inorganic salt solution as the anolyte. For all the t...

show abstract

“…For the quantification of persulfate, volumetric determination (titration) based on the method of Kolthoff and Carr (1953) was used (Kolthoff and Carr, 1953). More info is provided in Appendix A.…”

Section: Quantification Of Residual Oxidant Concentrationmentioning

confidence: 99%

Comparison of UVC/S2O82− with UVC/H2O2 in terms of efficiency and cost for the removal of micropollutants from groundwater

Antoniou

Andersen

2015

Chemosphere

View full text Add to dashboard Cite

Highlights Cost comparison of UVC/HP and UVC/PS for groundwater treatment.  UVC/PS performed better for atrazine removal in Milli-Q water.  UVC/HP had a better overall performance for the removal of the mixture of contaminants.  Results from the collimated beam apparatus were comparable to the flow-through system.  UVC/PS is economically feasible for special matrices where selective oxidation is required. Graphical Abstract 2 AbstractThis study compared the UVC/S 2 O 8 2-system with the more commonly used AOP in water industry, UVC/H 2 O 2 , and examined whether the first one can be an economically feasible alternative technology. Atrazine and 4 volatile compounds (methyl tert-butyl ether, cisdichlorethen, 1,4-dioxane and 1,1,1-trichloroethane) were chosen as model contaminants because they exhibit different susceptibility to UVC photolysis and AOPs. A collimated beam apparatus was utilized for the majority of the experiments (controlled environment, without mass transfer phenomena), while selected experiments were performed in a flow-through reactor to simulate industrial applications. Initial experiments on the activation of oxidants with a LP lamp indicated that S 2 O 8 2-is photolysed about 2.3 times faster than H 2 O 2 and that the applied treatment times were not sufficient to utilize the majority of the oxidant. The effect of oxidants' concentrations were tested with atrazine alone and in the micropollutants' mixture and it was decided to use 11.8 mg/L S 2 O 8 2-and 14.9 mg/L H 2 O 2 for further testing since is closer to industrial applications and to minimize the residual oxidant concentration. Changes of the matrix composition of the treated water were investigated with the addition of chloride, bicarbonate and humic acids at concentrations relevant to a well-water-sample, the results showed that the system least affected was UVC/H 2 O 2 . Only when bicarbonate was used, UVC/S 2 O 8 2-performed better. Overall, testing these systems with the mixture of micropollutants gave better insights to their efficiency than atrazine alone and UVC/S 2 O 8 2-is recommended for selective oxidation of challenging matrices.

show abstract

Volumetric Determination of Persulfate in Presence of Organic Substances

Cited by 126 publications

References 9 publications

An isotachophoresis for the microdetermination of potassium persulphate as initiator in emulsion polymerization

An isotachophoresis for the microdetermination of potassium persulphate as initiator in emulsion polymerization

Lab-scale feasibility tests for sediment treatment using different physico-chemical techniques

Comparison of UVC/S2O82− with UVC/H2O2 in terms of efficiency and cost for the removal of micropollutants from groundwater

Contact Info

Product

Resources

About