Effect of placement conditions for active monitoring of trace element with the epiphytic moss.

In this work, problems arising by use of active biomonitoring are discussed. Biomonitoring technique using positioned vertically frameworks and epiphytic moss Pylaisia polyantha is proposed. The influence of tree species on which the bark of the frameworks is fixed, altitude, and orientation is researched.

Criteria of radon risk of territories and methods for their determination.

The paper analyzes the values used in the assessment of radon potential of territories. It was shown that the most reliable criterion in the assessment of radon risk of territories can be the value of radon activity concentration fixed at large depths. The authors proposed a simple method to assess this value and radon flux density from the soil surface, based on the measurement of radon activity concentration in soil gas at two twice differing depths and the diffusion model of transport.

A new method for estimating the coefficients of diffusion and emanation of radon in the soil.

This paper describes a new method for determining the basic parameters of soil - diffusion and emanation coefficients related to the transfer of radon in the soil matrix, which are very useful for testing models, based on diffusion and characteristics of various soil matrices regarding the dangers of radon. The method is based on the measurement of radon in soil air on two small depths, differing twice. The paper presents the results of the determination of the parameters for covering loams and clays of Tomsk (Russian Federation), obtained by this method.