摘要
文章通过分析底泥和上覆水体中污染物含量的变化,探讨了硝酸钙投加对河道污染物控制效果的影响。结果表明:硝酸钙的投加明显改善了底泥的氧化还原电位,控制了底泥TP的释放,并有效削减底泥有机质含量,去除率可达到26.6%;硝酸钙的投加对上覆水体中的NH_4^+-N、COD、TP等都有明显的修复效果,DO含量明显提升,氨氮的去除率接近100%,COD去除率可达到50.1%,总磷去除率为72.0%。结合修复效果和经济成本,选择3.2 g/kg硝酸钙为最佳投加量。
The influence of calcium nitrate on contamination control in river was discussed via analyzing the change of contamination content in sediment and overlying water.The results showed that the addition of calcium nitrate improved the REDOX potential of sediment,controlled the release of TP,and reduced the organic matter content of sediment with the removal rate of 26.6%.The dosing of calcium nitrate had obviously positive effect on NH4+-N,COD,TP;and the value of DO was significantly improved.The highest removal rates of NH4+-N,COD and TP were near 100%,50.1%and 72.0%,respectively.Considering the remediation effect and economic cost,3.2 g/kg of calcium nitrate was selected as the optimal dosage.
作者
吴比
黄毅华
马君妍
朱南文
袁海平
WU Bi;HUANG Yihua;MA Junyan;ZHU Nanwen;YUAN Haiping(School of Environmental Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China;Water Management Station,Jiangchuan Road,Minhang District,Shanghai 200240,China;Shanghai Institute of Pollution Control and Ecological Safety,Shanghai 200092,China)
出处
《环境科学与技术》
CAS
CSCD
北大核心
2019年第2期157-162,共6页
Environmental Science & Technology
基金
国家重点研发计划项目(2016 YFC0401500)
国家重点研发计划项目第七课题(2016 YFC0401507)
上海市科委课题(16DZ1204802)
关键词
硝酸钙
水体水质
河道底泥
反硝化
calcium nitrate
water quality
sediment
denitrification
