METHOD FOR DETERMINING TECHNOGENOUS CONTAMINATION OF SOIL AND BOTTOM SLUDGE WITH METALS Russian patent published in 1998 - IPC

FIELD: environment protection; ecological biophysics. SUBSTANCE: method involves measuring magnetic susceptibility of soils and bottom sludge on the case and control sites to make conclusions concerning their contamination degree based on comparison using a relation. When χ_meas/χ_backg>1.2-1.3, moderate contamination is the case. When χ_meas/χ_backg>1.8-2.0, severe contamination is the case. χ_meas is the magnetic susceptibility measured on the case site under investigation. χ_backg> is the magnetic susceptibility measured on the control site. EFFECT: enhanced accuracy of conclusions; low cost method. 6 dwg , 2 tbl