LI He-nan,SUN Yong-li,HUANG Peng,et al.Redox Characteristics of Urban Water Body and Sediment Improved by Vallisneria natans[J].China Water & Wastewater,2021,37(23 23):28-33.
Redox Characteristics of Urban Water Body and Sediment Improved by Vallisneria natans
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
23 23
Page:
28-33
Column:
Date of publication:
2021-12-01
- Keywords:
- Vallisneria natans; black and odorous water body; sediment; oxidation reduction potential (ORP); pollutants reduction
- Abstract:
- Remediation of the black and odorous water and sediment by a typical submerged plant Vallisneria natans was investigated. Oxidation reduction potential (ORP) was selected as an important index and monitored during the whole process. In addition, dissolved oxygen (DO), nitrogen and phosphorus concentrations in the water and TOC and TN contents in the sediment were monitored. The ORP of the water and sediment improved by Vallisneria natans showed an obvious day and night variation phenomenon, that was, the ORP increased in daytime and decreased at night. ORP of the water was increased by 35.7%, and ORP at the depth of 1 cm, 5 cm and 10 cm of sediment could be increased by 2.8%, 19.8% and 12.5% respectively. Vallisneria natans had obvious effects on the removal and control of pollutants in water and sediment, and the humus in water was significantly reduced.
Last Update:
2021-12-01