Gas phase heats of formation (HOF) of 18 kinds of 390 organic compounds were calculated by quantum chemical calculation using semi-empirical PM3, PDDG and PM6 methods. The calculated HOFs were compared with the experimental data to illustrate the accuracy for different kinds of organics. Furthermore, the calculated values were linearly fitted with experimental values using the least square meth...

objective(s): cuo is one of the most important transition metal oxides due to its captivating properties. it is used in various technological applications such as high critical temperature superconductors, gas sensors, in photoconductive applications, and so on. recently, it has been used as an antimicrobial agent against various bacterial species. materials and methods: here, we synthesized cu...

in this research, the effects of the addition of powdered activated carbon (pac) into the aeration zone of an activated-sludge (as) system for treating tehran oil refinery effluent, was investigated during more than 12 months in a pact pilot-scale model. besides the evaluation of organics removal efficiency and determination of basic design factors kinetic coefficients, a series of experiments ...

Although a number of gas-phase chemical mechanisms, such as CBM-IV, RADM2, and SAPRC have been successful in studying gas-phase atmospheric chemical processes, they all used different combinations of lumped organic species to describe the role of organics in gas-phase chemical processes. Photochemical Assessment Monitoring Stations (PAMS) have been in use for over a decade and yet it is not cle...

Introduction: One crucial discovery by the 2009 NASA Phoenix Lander was the detection of perchlorate at ~1% in the surface Martian regolith [1]. High concentrations of perchlorate may oxidize organics on Mars and be problematic during extraction of organics during future in situ investigations. High temperature pyrolytic extraction methods will likely result in catalytic degradation of organics...

The wastewater characteristics and some operational control parameters limit the efficiency of attached growth processes for petrochemical treatment. This study aims to determine a hybrid biological reactor treating actual identify determining factors. An up-flow filled with bio-career was operated at two flow rates, dissolved oxygen (DO) levels, under anaerobic conditions. Due varying wastewat...

Halogen-containing organic substances have a detrimental and toxic impact on the environment human health due to their high stability, carcinogenic effects, ability accumulate when ingested. The production release of these significantly increased in recent decades, resulting lack effective treatment technologies. Adsorbable halogens (AOX), specific parameter used monitor pollution, represents t...