Chemical Treatment Technologies: Precipitation and Toxicity
The electroplating industry uses many chemicals in the process of plating objects like golf clubs and water faucets with metals such as chromium and copper. Before the chemically-laden water used in the electroplating process can be released into s...
Series: Environmental Science
Subject: environmental
Chemical Treatment Technologies: Electrolysis
The oxidation/reduction process is applied by industries in several unique and environmentally beneficial ways. The most frequently used technique
Series: Environmental Science
Subject: environmental
Transcript: [ narrator ] the oxidation/reduction process is applied by industries... in several unique and environmentally beneficial ways. the most
Chemical Treatment Technologies: Innovative Oxidation Processes
To reduce the reliance on harmful chlorinated oxidizing agents, the EPA has conducted numerous demonstrations of the effectiveness of safer oxygen-based compounds. The performance of these oxidizers can be enhanced by the addition of powerful ultra...
Series: Environmental Science
Subject: environmental
Chemical Treatment Technologies: Ozonation
Traditionally, chlorine has been used as a disinfectant to kill viruses and bacteria in drinking water. However, chlorine has the disadvantage of reacting with organics in the water, producing potentially carcinogenic by-products. Ozonation, an ox...
Series: Environmental Science
Subject: environmental
Chemical Treatment Technologies: Water Treatment
The control of pH is critical in the treatment of both wastewater and drinking water. Through the Clean Water Act of 1972, the Environmental
Series: Environmental Science
Subject: environmental
Transcript: carbonic acid. We do this, because our final product must meet... The environmental protection agency's Primary drinking water standards: The final ph must
Chemical Treatment Technologies: Oxidation, Reduction and Gaseous Wastes
Oxidation and reduction not only apply to liquid waste streams. A packed bed scrubber can be used to treat gaseous wastes, such as the hydrogen sulfide odors from a water treatment facility.
Series: Environmental Science
Subject: environmental
Sexual Orientation and Genetics (Part Three)
Dean Hamer, Director of the Gene Structure and Regulation Unit at the National Cancer Institute, explains that while there does appear to be a genetic component to sexual orientation, the genetic component is not the only factor involved.
Transcript: Twin studies suggest that 50% of being gay is genetic But 50% is not. 50% is what we call environmental which means Everything not genetic. We have
Introduction to Waste Stream Management: Solid Waste
Improper disposal of hazardous substances removed from both air and water treatment can become solid waste problems. Thermal treatments, like the reciprocating grate incinerator, can be used to eliminate most of the volume of solids. When large am...
Series: Environmental Science
Subject: environmental
Introduction to Waste Stream Management: Gaseous Waste
environmental problems. A range of treatments, including physical, chemical, thermal and biological, can be applied to gaseous wastestreams.
Series: Environmental Science
Subject: environmental
Transcript: variety of health and environmental problems. some air pollutants react with other substances... resulting in the contamination of another environmental
Physical Treatment Technologies: Filtration
Filtration is one of the most common techniques for physical separation, and is used to remove solids from both gaseous and liquid streams. It is frequently used in the treatment of waste water.
Series: Environmental Science
Subject: environmental