铬渣长期堆存后的组成变化及对治理的影响

The composition changing of chromic residue after piled in long period and its effect on the treatment

国内外对铬渣治理及其污染土壤的修复日益重视。中国已提出2010年底前,所有历史堆存铬渣无害化处置。对野外堆存多年铬渣的组成变化、不同pH时6价铬浸取行为、铬渣对地表水和地下水的影响、硫酸亚铁对铬渣中6价铬还原的可能性、国外铬渣无害化技术进行了评述。这些研究对控制铬渣污染区6价铬的固化—无害化技术、溶解—回收技术很有参考价值。

The disposal of chromic residue and renovation of soil polluted are increasely attracted attention at home and abroad. China has put forward a proposal,in that all the chromic residues piled preciously in China should be treated innoxiously before the end of 2010. The composition change of chromic residue after piled in a long period, Cr^6＋ leaching behavior at different pH, the effect of chromic residue on ground and surface water, the possibility of reducing Cr^6＋ in chromic residue by ferrous sulfate and the detoxification technique of chromic residue in foreign countries are reviewed. Those research achievements have an important reference for controlling chromic residue pollution and recovery of the valuable substance.