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Remediation of soils contaminated with metal must ensure high efficiency of metals removal, reduce bioavailability of residual metals and decrease ecological risk. Thus, for comprehensive environmental soil quality assessment, different indices must be used. In this study, suitability of 8 indices was used for soil highly contaminated with Cu (7874.5 mg kg −1 ), moderately with Pb (1414.3 mg kg −1 ) and low with Zn (566.1 mg kg −1 ), washed in batch and dynamic conditions with both conventional and next-generation washing agents. The following indices were used: modified contamination factor ( mC   f  ), modified contamination factor degree ( mC   deg  ), mobility factor ( MF ), reduced partition index ( IR ), potential ecological risk factor ( E   r,Z  ), modified potential ecological risk factor ( E   r,m  ), potential ecological risk index ( RI   Z  ) and modified ecological risk index ( RI   m  ). For m C   f ,   mC   deg   and  IR  own classification scale was proposed. It was proven that most useful indices for assessment of soil pollution with metals were  mC   f   and  mC   deg  . The  mC   f   together with the  IR  allow to simultaneous assessment of soil pollution and stability for individual metals. These indices were appropriate for soil contaminated with different concentrations of metals, washed under both hydrodynamic conditions using various washing agents and different effectiveness of metals removal. Thus, they may be considered as most useful for evaluation of remediation method, feasibility of washing agent and assessing soil quality after washing.

Suitability of environmental indices in assessment of soil remediation with conventional and next generation washing agents