研究目的
Investigating the presence of heavy metals in soil polluted by paper industry waste using laser-induced breakdown spectroscopy (LIBS).
研究成果
The LIBS method effectively detected heavy metal elements (Fe, Cu, Cr, Mn, Ca, Al) in soil contaminated by paper industry waste, demonstrating its potential for rapid and efficient soil pollution analysis without complex sample preparation.
研究不足
The study is limited by the matrix effect in soil samples, which complicates analysis due to physical and chemical properties. Additionally, the method requires soil samples to be prepared as pellets for effective analysis.
1:Experimental Design and Method Selection:
The study employed laser-induced breakdown spectroscopy (LIBS) with a pulsed Nd:YAG laser (1064 nm, 8 ns, 200 mJ) focused on soil samples prepared as pellets at atmospheric pressure.
2:Sample Selection and Data Sources:
Soil samples contaminated with paper industry waste and uncontaminated soil were compared.
3:List of Experimental Equipment and Materials:
Nd:YAG laser, Optical Multichannel Analyzer (OMA), optical fibers, chamber, vacuum pumps, pressure measuring equipment, mirrors, lenses, and computers.
4:Experimental Procedures and Operational Workflow:
The laser was focused on soil pellets to induce plasma, with emissions detected by OMA. Spectra were compared with NIST standards.
5:Data Analysis Methods:
Emission spectra were analyzed to identify heavy metal elements based on wavelength and intensity.
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