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This paper describes the model of heavy metal-Cu contaminated soil remediation standard value based on risk assessment. In the Cu contamination risk assessment model, the main exposure methods are oral ingestion and inhalation through breathing, which not only simplifies the calculation but also make people get a clearer understanding of the way of Cu contamination. We get the simplified formula, calculate and discuss Cu contaminated soil remediation target value in specific parameters to provide reference and basis for the remediation of Cu contaminated soil.

This paper reports an experiment made to test the possibility of achieving spatial resolution in the observation of a cylindrical plasma utilizing a high quality objective, avoiding so the classical Abel inversion. The result shows that 90 % of the light is issued from a zone covering one fourth of the radius of the cylinder for the 5 770 Hg line emitted in a lamp. This result which may be acceptable for many experiments is not so good that one could expect from simplified calculations also reported. RESUME : Cet article presente une experience faite pour tester la possibilite d'obtenir une resolution spatiale dans I'observation d'un plasma cylindrique, a l'aide d'un objectif de haute qualite, ce qui permettrait d'eviter la classique inversion d'Abel. Le resultat montre que 90 0 4 de la lumiere provient d'une zone recouvrant le quart du rayon du cylindre pour la raie 5 770 A Hg emise par une lampe. Ce resultat, qui peut stre acceptable pour de nombreuses experiences, ne rejoint pas les previsions de calculs simplifib qui sont aussi presentes.

This paper is about the migration of the total petroleum hydrocarbon (TPH) contamination, which concludes the migration rule of the TPH contamination through designing indoor soil column leaching experiment. Through researching the migration concentration of different components of TPH, experiment concludes that different components have different relative transfer abilities in typical soil, and the transfer ability has an inverse relation to the molecular weight and the ring numbers of aromatic hydrocarbon. The purpose of this research is to provide guidance to nonproliferation and remediation of the petroleum contamination.

In the remediation of heavy metal contaminated site, determining the remediation boundary of contaminated site and amount of contaminated soil are important link of the entire work. This paper uses surfer software to draw out a picture of Pb-contamination distribution in different soil layers, determines a remediation boundary, and provides a reliable basis and brings great convenience for later repair work.