Study on the effects of sonolysis, ozonolysis and US/O3 system on the decomposition of p-chlorophenol in aqueous solutions indicated that in the cases of US/O3 system, individual ozonolysis and sonolysis, the decomposition rate of p-chlorophenol reached 78.78%, 56.20%, 2.79% after a 16-min reaction while its CODcr (chemical oxygen demand) removal rate was 97.02%, 62.17%, 3.67% after a 120-min r...

Vegetable oil-based and potentially biodegradable polyesters were prepared from 9-hydroxynonanoic acid methyl ester. This paper describes ozonolysis of vegetable oils and the method for preparation of useful monomers and in particular 9-hydroxynonanoic acid methyl ester. Ozonolysis of soybean oil and castor oil in methanol and methylene chloride solution, followed by reduction with sodium boroh...

An investigation on modification of natural zeolite with ZnO for the degradation tartrazine. In this study, as a semiconductor is modified into support to form ZnO/zeolite that can increase efficiency Further, formed catalyst was added tartrazine by determining variation in ozonolysis time, amount addition catalyst, and time. The results were determined UV-Vis spectrophotometer at 424 nm. resul...

Adsorption of environmentally important aromatic molecules on a water surface is studied by means of classical and ab initio molecular dynamics simulations and by reflection-absorption infrared spectroscopy. Both techniques show strong activity and orientational preference of these molecules at the surface. Benzene and naphthalene, which bind weakly to water surface with a significant contribut...

Rayleigh-Schrodinger-Mqller-Plesset (RSMP) perturbation calculations using a split-valence basis augmented by d-type polarization functions have been carried out on peroxymethylene, the so-called Criegee intermediate of the ozonolysis reaction. Accurate equilibrium structures for the bent, linear, and perpendicular molecule as well as its cyclic isomer, dioxirane, have been determined. With the...

13-Aminotridecanoic acid, the monomer for nylon 13, was synthesized from commercial erucic acid or its derivatives by several methods in a study to determine the method of choice, which involved oxidative ozonolysis of eruconitrile, followed by esterification before isolation to give methyl 12-cyanododecanoate. The cyano ester was then catalytically reduced and hydrolyzed, without isolation of ...

Isoprene is globally the most ubiquitous nonmethane hydrocarbon. The biogenic emission is found in abundance and has a propensity for SOA formation in diverse climates. It is important to characterize isoprene SOA formation with varying reaction temperature. In this work, the effect of temperature on SOA formation, physical properties, and chemical nature is probed. Three experimental systems a...

The ozonolysis of α-pinene has been investigated under dry and humid conditions in the temperature range of 243–303 K. The results provided new insight into the role of water and temperature in the degradation mechanism of α-pinene and in the formation of secondary organic aerosols (SOA). The SOA yields were higher at humid conditions than at dry conditions. The water induced gain was largest f...

Biochar, the pyrolysis product of carbon-rich biomass, renders climate benefits because it helps to sequester carbon in soil. Biochar also improves soil health increases nutrient retention capacity topsoil, improving aggregate stability and water holding capacity. These contribute agricultural production biochar provides a good substrate for nourishing root growth plant health, thereby contribu...