沸石和页岩陶粒对沉积物营养盐释放的抑制效果试验  

Inhibitive Effect Test of Nutrients Release from Sediments by Zeolite and Shale Ceramsite

作　　者：孙健 杨明 贺珊珊 蔡世颜 刘琪 刘向荣 SUN Jian;YANG Ming;HE Shanshan;CAI Shiyan;LIU Qi;LIU Xiangrong(Central&Southern China Municipal Engineering Design and Research Institute Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]中国市政工程中南设计研究总院有限公司,湖北武汉430010

出　　处：《净水技术》2023年第2期140-146,共7页Water Purification Technology

摘　　要：为探讨沸石和页岩陶粒对水体沉积物营养盐释放的抑制效果,设置了沸石、页岩陶粒覆盖沉积物和未覆盖沉积物试验,定期监测上覆水中TP、TN、氨氮、COD_(Cr)和叶绿素a(Chl.a)指标,并对比分析沉积物中微生物群落。结果表明,覆盖沸石和页岩陶粒能有效抑制沉积物中N、P营养盐向上覆水的释放,但上覆水中COD_(Cr)含量上升。沸石和页岩陶粒主要通过吸附作用抑制沉积物中P的释放,通过基质吸附作用和Ornatilinea与芽孢杆菌属(Bacillus)微生物的脱氮作用抑制沉积物中N的释放,通过促进纤绳菌属(Levilinea)和长绳菌属(Longilinea)厌氧微生物对碳水化合物的代谢作用,引起上覆水中COD_(Cr)含量上升。但沸石和页岩陶粒覆盖不能长期维持上覆水中较低的N、P含量,可考虑与沉水植物联合作用进行生态修复。To investigate the inhibitive effect of nutrients from sediments by zeolite and shale ceramsite,set up zeolite,shale ceramsite-covered sediment and uncovered sediment tests.TP,TN,ammonia nitrogen,COD_(Cr)and Chl.a were monitored regularly in the overlying water.And microbial communities in sediments were analyzed.Results showed that zeolite and shale ceramsite effectively inhibited the release of N and P from sediment to overlying water,but COD_(Cr)content in the overlying water increased.Zeolite and shale ceramsite inhibited P releasing from sediments mainly through adsorption,inhibited N releasing from sediments mainly by adsorption and denitrification by Ornatilinea and Bacillus.Zeolite and shale ceramsite promoting the metabolism of carbohydrates by Levilinea and Longilinea led to COD_(Cr)content increasing in overlying water.However,only covering zeolite and shale ceramsite can not maintain low N and P content in overlying water for a long time,so zeolite and shale ceramsite combined with submerged macrophytes can be considered for ecological restoration.

关 键 词：沸石 页岩陶粒 沉积物 营养盐 抑制释放 微生物群落分析 

分 类 号：X52[环境科学与工程—环境工程]