ZHUZheng,WANGYi,WANGWen-huai,et al.Performance of Calcium Peroxide and Sponge Iron Suspension for Purifying Landscape Water[J].China Water & Wastewater,2024,40(7):79-84.
Performance of Calcium Peroxide and Sponge Iron Suspension for Purifying Landscape Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第7期
Page:
79-84
Column:
Date of publication:
2024-04-01
- Keywords:
- landscape water; calcium peroxide; sponge iron; mixture ratio of filler; Fenton-like reaction; ecological floating bed
- Abstract:
- This paper investigated the performance and mechanism of calcium peroxide (CP) and sponge iron (SI) with different mass ratios for purifying landscape water through simulation tests, so as to solve the problem of poor performance of traditional ecological floating bed for removing nitrogen, phosphorus, algae and refractory organic matters from landscape water. The combination of CP and SI achieved good removal performance of nitrogen and phosphorus in water, the optimal treatment performance was obtained when the mass ratio of CP and SI was 1∶8, and the removal rates of NO3--N、NO2--N and PO43--P reached 98.56%, 100% and 85.91%, respectively. Meanwhile, ·OH with strong oxidizing ability generated in the Fenton?like reaction between H2O2 and Fe(Ⅱ) produced by dissolution of CP and SI effectively reduced the density of algae in water and disintegrated the organic matters. The removal rate of algae density reached 83.75%, and the concentration of fulvic acid was significantly reduced. In addition, CP and SI enhanced the removal of phosphorus from water by precipitation and adsorption, and transformed easily released phosphorus into stable Ca-P, which reduced the risk of re-release of deposited phosphorus.
Last Update:
2024-04-01