NATURAL ZEOLITES EFFECT ON HEAVY METALS IMMOBILIZATION IN SOIL

摘要

The problem of soil decontamination is a very acute one in Romania, due to the local conditions. Such a region that suffers much because pollution with heavy metals is the Copsa Mica area, where historical and actual contamination has extremely large values. The fact that this is one of the poorest regions in the country prevents the landowners to take any action against the heavy metals entering the food chain. The paper presents our field researches on the introduction into the arable layer of zeolite (clinoptilolitic) volcanic tuffs (ZVT) and the effects in time on the heavy metals uptake and on the yield of some cultivated plants, in a heavily polluted area in Romania.