Application of improving oxygen releasing material in situ polluted groundwater PRB bioremediation
地下水PRB原位生物修复中一种释氧材料的改进技术及效果分析

It is an important factor if the oxygen-releasing material could release oxygen continuously and economically upon contact with water in situ polluted groundwater bioremediation. The experiment was intended for improving property of oxygen-releasing material through adding bentonite,KH2PO4 and (NH4)2SO4 into calcium peroxide (CaO2).The results of the continuous column experiment show that the oxygen-releasing material could decrease O2-releasing rate and lengthen O2-releasing duration. The DO can retain more than 5 mg/L for long time. In addition, KH2PO4, (NH4)2SO4 and the natural aquifer can better buffer pH and meet the need of bioremediation.