摘要
采用实验室模拟试验,研究了三种供氧方式——曝气、投加过氧化氢和投加过氧化钙对水库底泥氮磷释放的影响.研究结果表明:(1)溶解氧是控制底泥氮磷释放的重要因素,厌氧条件能加速底泥释放磷和氨氮;(2)曝气、投加过氧化氢和投加过氧化钙均能显著提高底部水体的溶氧水平,并能有效抑制底泥氮磷的释放.三种供氧方式对底泥释磷的控制效率依次为:投加CaO2>曝气>投加H2O2;对氨氮释放的控制效率则为:曝气>投加CaO2>投加H2O2.
This paper investigated effects of three oxygenation methods-aeration,hydrogen peroxide doses and calcium peroxide doses-on the release of N and P from reservoir sediments under simulated conditions.The results showed that:(1)Dissolved oxygen is the main parameter con-trolling the release of N and P;anaerobic condition can stimulate the release of NH4 + and P from reservoir sediments.(2)Aeration,H 2 O 2 doses and CaO 2 doses can generally enhance the DO levels in the hypolimnetic water body.Both N and P release from sediments were inhibited under these three treatments.In laboratory studies involving three different oxygenation meth-ods,the efficiency of the control of phosphorus release was in the order of CaO 2 doses>aera-tion>H 2 O 2 doses,while the efficiency of the control of ammonia was in the order of aeration>CaO 2 doses>H 2 O 2 doses.
出处
《湖泊科学》
EI
CAS
CSCD
2004年第1期28-34,共7页
Journal of Lake Sciences
基金
国家863计划"南方地区安全饮用水保障技术"(2002AA601120)
深圳市水务局资助项目"深圳市西沥水库内源污染调查与研究"
关键词
供氧方式
水库底泥
氮磷释放
厌氧
充氧
Sediment
nitrogen and phosphorus release
anaerobic
oxygenation
