Sanation of arsenic polluted soils by the use of combined ameliorant
There are presented results of examining the efficiency in application of combined ameliorant on the basis of using domestic natural materials for detoxication of arsenic polluted alluvialsoddy light clay soil. Also studied is the influence of combined ameliorant on arsenic migration within the system ‘soil-plant-ground waters', rehabilitation of polluted soil, cropping power and quality of agricultural crops. It is established that for detoxication of soils, polluted by arsenic (40 мg / кg), as ameliorant of prolonged action can be most effectively used the diatomite, processed by Fe <sup>3</sup>+, together with blue (caoline) clay (1:1) in combination with nitrogen-phosphorus-potassium fertilizer, which permits inactivating agile forms of arsenic, creating thereby premises for return of soils into agricultural turnover.