中文摘要：

利用过氧化钙（CaO2）遇水释放氧气的特性,采用混合法将CaO2载入到磷酸钙骨水泥（CPC）中,并通过挤出-滚圆造粒方法制备出CPC/CaO2氧缓释复合材料,旨在为污染地下水的好氧生物修复技术提供一种长期、高效的供氧源。由X射线衍射（XRD）分析可知,通过固相反应制取的CPC主要成分为Ca5（PO4）3（OH）和Ca10（PO4）6（OH）2,具有较快的固化时间和固化效果;CPC/CaO2氧缓释复合材料分3个阶段进行释氧,其中2、3阶段分别符合一级和零级释氧动力学特征,且其释氧速率和释氧周期得到明显改善。本研究成果可用于实际地下水修复工程,解决污染地下水原位生物修复过程中溶解氧（DO）的输送问题。

英文摘要：

Calcium peroxide（CaO2） is an emerging oxygen source for microbes in bioremediation of contaminated groundwater,but its rapid oxygen releasing velocity limits the engineering application of CaO2.In this paper,calcium phosphate cement（CPC） was firstly synthesized from calcium phosphate,calcium carbonate and calcium hydrogen phosphate by solid reaction,and then self-setting CPC/CaO2 composite was constructed by incorporating CPC and CaO2.Phase composition of CPC is composed of Ca5（PO4）3（OH） and Ca10（PO4）6（OH）2 with the examination of X-ray diffraction（XRD）.The results of batch experiments showed that the oxygen-release process of powdery CaO2 and granular CPC/CaO2 composite comprise three phases,and a first order kinetic equation can describe the second phase whereas a zero order model can be used to describe the third one.In addition,the oxygen releasing velocity of granular CPC/CaO2 composite is obviously slower than that of powdery CaO2,which will be useful for the application of CPC/CaO2 composite in bioremediation of contaminated ground-water.