In recent years, water pollution has become a significant global issue because of its deadly effect on all forms of life. The Port of Los Angles (POLA) and Port of Long Beach (POLB) have heavy traffic that leads to public concerns about the biological and ecological effects of the discharged wastewater from these vessels. The discharged wastewater from commercial cargo and passenger vessels is the main source of nitrite pollution and has adverse environmental and health impacts. There is a pressing need for a wastewater analyzer that has low costs to construct and operate.
In this thesis, we develop a miniaturized wastewater analyzer based on microfluidics technology. We combine a customized microfluidic chip and standard colorimetric method to develop a new system for nitrite detection. The system has a low construction cost and is simple to operate. We use a commercial microscope with a customized green LED light source and a CCD camera. For proof of concept, we tested water samples from POLA and POLB with our microfluidics-based system and determined the nitrite concentrations to be 23 ± 3.48 μg/L and 33.07 ± 1.14 μg/L, respectively. The result from our microfluidic wastewater analyzer was comparable to that from a commercial UV-Vis spectrophotometer (Shimadzu UV mini 1240), which determined the nitrite concentrations to be 15.75 ± 0.53 μg/L and 35.93 ± 1.26 μg/L for POLA and POLB, respectively.
|Advisor:||Lo, Roger C.|
|School:||California State University, Long Beach|
|School Location:||United States -- California|
|Source:||MAI 51/05M(E), Masters Abstracts International|
|Subjects:||Chemical engineering, Environmental engineering|
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