摘要
为研究江河航道环保疏浚的影响因素,选取三峡库区沿线污染较为严重的李家沱码头的底泥为研究对象通过在底泥样本中加入钝化剂PAC及钝化剂硝酸钙,7 d后分别用普通疏浚铰刀、普通加罩铰刀、环保螺旋铰刀和环保螺旋加罩铰刀进行疏浚考察疏浚后48 h内上覆水中污染物COD、TP、TN、NH_3-N的释放规律研究结果表明:4种污染物的释放量,在加入钝化剂PAC进行疏浚后,比加入钝化剂硝酸钙疏浚后少,且疏浚设备环保螺旋铰刀的疏浚效果优于普通的工程铰刀。
A laboratory experiment was conducted in order to study the factors affecting the environmental dredging of navigation channel with the sediment samples grabbed from the river bottom near the Lijiatuo wharf in Three Gorges Reservoir area,where the river water had been contaminated.Into the sediment samples were added the passivants,i.e.PAC and calcium nitrate,respectively,and after seven days different kinds of reamers,i.e.the normal dredging reamer,normal reamer with cover,environmental spiral reamer and environmental spiral reamer with cover were respectively used for simulative dredging.Then the pollutants such as COD,TP,TN and NH3-N released into the overlying water were investigated within 48 h after the end of dredging work.In conclusion,experimental study suggested that,in terms of the released quantity of pollutants,addition of PAC was better than that of calcium nitrate;in addition,the environmental spiral reamer was better than the normal reamer in regards to the effect of dredging.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2017年第1期128-132,共5页
Environmental Science & Technology
基金
国家科技支撑计划项目:三峡水库常年回水区航运工程建设关键技术研究(2011BAB09B01)
重庆市科技研发基地建设计划项目(国际科技合作):中-加三峡水域国际科技合作示范基地(cstc2013gjhz20001)
关键词
环保疏浚
钝化剂
污染物
疏浚铰刀
释放规律
environmental dredging
passivant
pollutants
dredging reamer
releasing rule
