FORMER MEMBER


Mahitti  Puanngam

Visitor (Exchange student)

 puanngam@exchange.uta.edu

 


Research Profile

Simple Fabrication of A Mercury Emission Detector

Mercury is one of the most toxic elements for humans, plants and animals. The United State Environmental Protection Agency has set the maximum mercury contaminant level of drinking water to 2 ug/L. This has led to the development of techniques for accurately determining the level of mercury. Many methods have succeeded; such as cold vapor atomic absorption spectrometry (AAS), atomic fluorescence spectrometry (AFS), inductively coupled plasma mass spectrometry (ICP-MS), optical emission spectrometry which includes inductively coupled plasma, laser induced plasma, microwave plasma, glow discharge and dielectric barrier discharge (DBD). My research is focussed on an atomic mercury emission detector that uses the dielectric barrier discharge as the excitation source for the mercury vapor. The solar blind UV-response photomultiplier tube is used as a transducer to convert the emission of the mercury line (254 nm) into an electric potential signal. And it also uses the mercury line filter to eliminate the background emission light that can reach the photomultiplier tube.


 

       Fig.1 Schematic diagram of the atomic mercury emission detector

 

Education

      B.Sc Chemistry, Burapha University, Thailand (2003).

 

Publications

  • Mahitti Puanngam, Fuangfa Unob, Preparation and use of chemically modified MCM-41 and silica gel as selective adsorbents for Hg(II) ions, Journal of Hazardous Materials, 2008, 154, 578-587.  DOI:10.1016/j.jhazmat.2007.10.090

  • Fuangfa Unob, Benjawan Wongsiri, Nuchnicha Phaeon, Mahitti Puanngam, Juwadee Shiowatana, Reuse of waste silica as adsorbent for metal removal by iron oxide modification, Journal of Hazardous Materials, 2007, 142, 455-462.  DOI:10.1016/j.jhazmat.2006.08.049 

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