采用聚乙烯醇（PVA）为包埋剂，制备了以火山渣为填充剂、过氧化钙（CaO₂）为氧源的缓释氧剂，旨在为黑臭水体治理提供一种高效可行的方式。通过清水实验和黑臭水体实验，研究了缓释氧剂的释氧性能及其在污染物去除方面的作用。结果表明，相较粉末状过氧化钙，缓释氧剂的释氧得到有效控制，且对pH的影响相对减弱。在2 L的黑臭水体中投加6.08 g缓释氧剂后，DO峰值达5.16 mg/L，且19 d内仍维持在2 mg/L以上，COD由145.99 mg/L降至28.6 mg/L，总磷去除率达95%以上。表明缓释氧剂能显著改善黑臭水体上覆水的溶氧状态，且对COD和总磷的去除有积极的促进作用。

A slow oxygen-releasing agent is prepared by using polyvinyl alcohol (PVA) as an embedding agent,scoria as a filling agent and CaO₂ as an oxygen source,aiming at providing an efficient and feasible way to treat black and odorous water.The oxygen-releasing performance of slow oxygen-releasing agent and its role in the removal of pollutants are evaluated through experiments on clear water and black odorous water,respectively.It is indicated that the oxygen release rate of slow oxygen-releasing agent is controlled effectively compared with powdered calcium peroxide,and the effect on pH value weakens relatively.After adding 6.08 g of slow oxygen-release agent into 2 L of black odorous water,the highest concentration of dissolved oxygen reaches 5.16 mg·L^-1 and maintains above 2 mg·L^-1 in 19 days,the concentration of COD decreases from 145.99 mg·L^-1 to 28.6 mg·L^-1 and the maximum removal rate of total phosphorus exceeds 95%.It indicates that this slow oxygen-releasing agent can significantly improve the dissolved oxygen state of the overlying water in the black odorous water and promote the removals of COD and total phosphorus.