chemical oxidation is one of the most suitable treatment methods for reducing organic pollutants and the number of pathogens remaining in secondary effluents. ozone is the most powerful oxidizing agent commonly used because of it's many advantages over chlorination. in this study the efficiency of ozonation in advanced wastewater treatment of sahebgharanieh plant has been determined. ozone gene...

Scanningelectron microscopy (SEM) has been utilized  to examine  the morphology and topography alterations  in the surface of Poly(Lactic Acid)(PLA) fabrics due to UV/Ozoneirradiation. In the past decade, a growing attention in the usage of “Green Techniques” in industrial applications has been observed owing to many benefits such as low impurities and their relatively low cost to substitute th...

Ground-based lidars are suitable for long-term ozone monitoring as a complement to satellite and ozonesonde measurements. However, current ground-based lidars are unable to consistently measure ozone below 500 m above ground level (AGL) due to both engineering issues and high retrieval sensitivity to various measurement errors. In this paper, we present our instrument design, retrieval techniqu...

Ozone transport models driven by high-quality analysed meteorological wind fields have been demonstrated to produce realistic ozone distributions. We describe a data assimilation system (TM3-DAM, version 3) which is currently in use to assimilate near-real time GOME ozone data, and which produces (three-day or longer) ozone forecasts. The model is a tracer transport model, called TM3, with a pa...

background: primary stability is an important factor for the clinical success of orthodontic mini-screws. the present study made an attempt to evaluate the effect of insertion angle changes on the maximum insertion and removal torque of orthodontic mini-screws. materials and methods: in this experimental study, 72 mini-screws (dual top anchor system, jeil, 1.6 mm diameter, 8 mm length) were use...