the aim of this study was to investigate the effect of different amounts of hydrogen peroxide and iron resources in refining petroleum (kerosene) contaminated soils using fenton reaction. for this, ten complex soil samples around tehran oil refinery were collected and after preparations were contaminated with two levels of 10 and 20% of petroleum (kerosene) in triplicate. after reaching equilib...

The aim of the study was to develop a process option for value addition leach residue from hydrometallurgical nickel refining. in question is copper-rich (58 %) with sulphur (23 %), (3 and iron (2 as other main constituents. prevailing phases are covellite antlerite already marketable product such. current suggests flow sheet moderate temperature autogenous pressure leach, selenium removal copp...

One of the most important and toxic heavy metals in wastewater is chromium. Cr (VI) is released from different industrial operations, including metallurgy, leather tanning, paint, textile industries, chemical manufacturing, pulp production, ore and petroleum refining, metal corrosion, electroplating products etc. Hexavalent chromium is toxic, carcinogenic, probably mutagenic and highly soluble....

New approaches to endoscopic ultrasound-guided gastroenterostomy (EUSGE) are under development, incorporating devices designed for transluminal therapy. Herein is the initial reported use of a novel, double-flanged, fully covered, self-expandable, metal stent with cautery, aimed at refining the EUS-GE procedure. A 43-year-old man was diagnosed with paraduodenal pancreatitis and walledoff necros...

The thesis is focussed on low consistency (LC) refining of mechanical pulp. The research included evaluations of energy efficiency, development of pulp properties, the influence of fibre concentration on LC refining and effects of rotor position in a two-zoned LC refiner. Trials were made in mill scale in a modern TMP line equipped with an MSD Impressafiner for chip pre-treatment, double disc (...

possibility of replacing whole soy flour for chocolate fat in chocolate production and its impact on textural, rheological and sensory properties of low fat chocolate was explored. for doing this, whole soy flour in 5 levels (0, 2,4,6,8 percent) and two refining times (105 and 135 minutes) was employed. results indicated that longer refining time gave rise to reduction in particles size and inc...