At present, the use of water in each country increases sharply, which also brings increasingly prominent environmental pollution problems. A large amount wastewater is discharged into body, seriously pollutes environment. Wastewater treatment has become focus global protection workers. Among them, advanced oxidation technology based on sulfate radical used to treat refractory organic pollutants...

ENVIRONMENTAL APPLICATIONS OF PERSULFATE: REMEDIATION CONTAMINATED GROUNDWATER AND SOILS. Environmental remediation represents a major technological challenge due to the complexity of environmental matrices and high treatment cost. In recent years, in situ chemical oxidation technologies (ISCO) have shown good cost/benefit ratio, which as favored their use degradation several relevant pollutant...

The compound 4-chlorophenol (4-CP) is known to be a highly toxic having harmful effects on human health and the environment. To date, removal of 4-CP by advanced oxidation processes (AOPs) has attracted tremendous attentions. persulfate-based AOPs show higher oxidation, better selectivity, wider pH range, no secondary pollution compared traditional Fenton-based AOPs. Carbon materials with low c...

Determination of total nitrogen in aqueous samples after potassium persulfate digestion compared favorably in both precision and nitrogen recovery with determinations obtained using Kjeldahl digestion. The determination of total nitrogen (TN = inorganic and organic fixed nitrogen) has largely depended either on acid Kjeldahl digestion ( cf. Strickland and Parsons 1972) or on photo-oxidation (Ar...

absorptive characteristics of polyaniline synthesized with two different oxidants including potassium iodate and ammonium persulfate was studied. synthesized polyanilines in powder shape is used as an adsorbent to remove toxic hexavalent chromium from aqueous solutions. experiments were conducted in batch mode with different variables such as agitation time, solution ph and initial concentratio...

In this work, the cubic cobalt and zinc doped co-doped magnetite nanocatalysts were synthesized characterized using different analysis. The so-synthesized photocatalysts used for activation of hydrogen peroxide (HP) persulfate (PS) under UVA irradiation. integration Fe2.5Co0.3Zn0.2O4 improved PS HP; wherein, UVA/Fe2.5Co0.3Zn0.2O4/PS process demonstrated higher degradation performance Sulfalene ...

Removal of natural organic matter (NOMs) from actual water is a major challenge in the context worldwide pollution resources. The removal humic acids system combining biochar adsorption and ultrasonic persulfate oxidation was studied this paper. effects addition, concentration initial pH were investigated. A high rate up to 92.5% achieved for combined biochar/ultrasonic/persulfate system, versu...

In this study, degradation of p-chlorophenol (p-CP) was evaluated using persulfate (PS) activated zerovalent iron (ZVI) based ultraviolet (UV) in a bench scale photoreactor. The effect of operational parameters such as solution pH (3, 7, and 11), reaction time (0-60 minutes), ZVI dosage (0.15, 1.25, 0.5, 1, and 1.5 mM), PS concentration (0.5, 1.5, 2, 2.5, 3, and 4 mM), and initial p-CP concentr...

The discoloration of the fluorescent dye, Rhodamine B (Rhd B) by persulphate (KSP), was investigated by spectrophotometric methods. The discoloration reaction of Rhd B by KSP is slow. It’s first order with respect to Rhd B and KSP. It’s effective at any pH and was found to increase linearly for pH< 4, temperature, and after addition of Fe(II) and Ag(I). The rate of discoloration remained the sa...