We describe a homemade, visible light spectrometer for use in secondary education. The system consists of a digital photograph frame as a source, square glass saltshaker "cuvettes", and a digital camera detector. A sample cuvette and blank cuvette are photographed side-by-side in front of the source. The red, green, and blue intensities from appropriate image regions are converted to absorbance using open source software. Several simple spectroscopy experiments are described.
Nutrient management is a critical issue for Water Resource Recovery Facilities, and sidestream treatment technologies to reduce nutrient loads often focus on liquid sidestream and require external carbon sources. Post...
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