A critical barrier to the routine use of nanomaterials is the tedious, expensive means of their synthesis. Microreaction technology takes advantage of the large surface area-to-volume ratios within microchannel structures to accelerate heat and mass transport. This accelerated transport allows for rapid changes in reaction temperatures and concentrations leading to more uniform heating and mixi...

Co-processing of hazardous wastes in cement kilns have for decades been thought to cause increased emissions of PCDD/PCDFs--a perception that has been evaluated in this study. Hundreds of PCDD/PCDF measurements conducted by the cement industry and others in the last few years, on emissions and solid materials, as well as recent test burns with hazardous wastes in developing countries do not sup...

During the past century, there has been a dramatic increase in the number of chemicals produced. Worldwide, there are more than 5 million known chemicals, with an additional 10,000 to 20,000 new chemicals developed each year. Furthermore, an estimated 500,000 unique shipments of hazardous materials occur daily throughout the United States, resulting in thousands of exposures to hazardous materi...

E-waste is one of the fastest growing waste streams in India due to increasing “market penetration” in developing countries, “replacement market” in developed countries and “high obsolescence rate”. The composition of e-waste is very diverse and differs in products across different categories. It contains more than a 1000 different substances, which fall under “hazardous” and “nonhazardous” cat...

BACKGROUND Releases of hazardous materials can cause substantial morbidity and mortality. To reduce and prevent the public health consequences (victims or evacuations) from uncontrolled or illegally released hazardous substances, a more comprehensive analysis is needed to determine risk factors for hazardous materials incidents. METHODS Hazardous Substances Emergency Events Surveillance (HSEE...

conclusions based on the findings obtained, the rate of total waste generation in the amol hospital is similar in range to that of other iranian hospitals, however, the hazardous fraction of this waste was high in comparison to other previous studies, and this is probably due to improper separation and management of the waste materials. results based on this study’s findings the average rate of...

Groundwater contamination is a serious problem that is growing in the United States, but its true extent is not known and it is difficult to determine because of the complexities of contaminants, their transformation, and fate in groundwater systems. It is also difficult to predict their movement in groundwater. Since we know that the problem is serious and that our needs for groundwater will g...