oil exploration and production zones are very frequently contaminated with petroleum hydrocarbons or its derivatives. the most important exploration and production zones are located in south-west and south of the country, in iran. masjed soleiman city is located on an oil field. the soil of this region has been affected by the petroleum composition. mach petroleum seepages and springs (asphalt,...

Abstract A methodology for the oxidation of α-trifluoromethyl alcohols to corresponding trifluoromethyl ketones is presented. catalytic quantity a nitroxide used, and potassium persulfate serves as terminal oxidant. The proves effective aromatic, heteroaromatic, conjugated alcohol substrates. It can be extended nonfluorinated secondary and, in this case, applied range aliphatic alcohols.

A poly(ethylene glycol) (PEG) based macroinitiator (MI) with terminal chloride atom at both ends was prepared by the reaction of PEG-400 with chloroacetyl chloride and used for the cationic polymerization of dodecyl vinyl ether (DVE) yielding ABA type block copolymer. The block copolymer was then used as the surfactant for the emulsion polymerization of vinyl acetate and styrene in the presence...

Materials: Glycol chitosan (GCS, Mw = 200 kDa; degree of deacetylation = 90%), potassium persulfate, sodium borohydride, succinic anhydride, melittin from bee venom, sodium dodecyl sulfate, D-(+)-trehalose dehydrate, N-succinimidyl 3-[2-pyridyldithio]-propionate (SPDP), tris(2carboxyethyl)phosphine (TCEP), triethlyl amine (TEA), ethylenediaminetetraacetic acid (EDTA), and dimethyl sulfoxide (DM...

This report describes the preparation of antibacterially active emulsified polyacrylate nanoparticles in which a penicillin antibiotic is covalently conjugated onto the polymeric framework. These nanoparticles were prepared in water by emulsion polymerization of an acrylated penicillin analogue pre-dissolved in a 7:3 (w:w) mixture of butyl acrylate and styrene in the presence of sodium dodecyl ...

The presence oí aggregates oí humic substances (HS) with inorganic adsorbates in a lagaon located in Huelva (south Spain) ia reported. The chemical nature oftbe fulvic acid (FA) fraction, extracted froro the natura] aggregate by treatment with chelating resins, has been investigated by physical and chemical methods. Tbe results suggest that these FA are similar f.o FA from other aquatic environ...

Graft copolymerization of rosin-(2-acryloyloxy)ethyl ester (RAEE) onto chitosan (Cts) was carried out under microwave irradiation using potassium persulfate as an initiator. The structures, morphology, and thermal properties of the Cts graft copolymer (Cts-g-PRAEE) were characterized by means of FT-IR, XRD, SEM, and TG. Also, Cts and Cts-g-PRAEE copolymer were used as carriers of fenoprofen cal...

The influence of persulfate activation methods on polycyclic aromatic hydrocarbons (PAHs) degradation was investigated and included thermal, citrate chelated iron, and alkaline, and a hydrogen peroxide (H₂O₂)-persulfate binary mixture. Thermal activation (60 °C) resulted in the highest removal of PAHs (99.1%) and persulfate consumption during thermal activation varied (0.45-1.38 g/kg soil). Per...