关键词: 锁磷剂, 硅藻土, 投加量, 除磷控藻, phoslock?, diatomite, dosage, removaling phosphorus and controlling phytoplankton

Abstract: Laboratory simulation experiments are carried out to explore the effect of removaling phosphorus and controlling phytoplankton from eutrophic water by using phoslock-diatomite. The result shows that the removal rate of 1.2Phl + 80 mg/L DM is the highest for TP, reaching 65.9%, followed by 1.5Phl + 80 mg/L DM, reaching 55.0%.The removal rate of SRP is mainly related to the dosage of phoslock?, however, the SRP removal rate did not change significantly when the dosage was higher than 1.2 Phl. Meanwhile, the abundance of phytoplankton decreased significantly in all experimental groups, and the phytoplankton species structure changed; 1.2Phl + 80 mg/L DM and 1.5Phl + 40 mg/L DM have a good inhibition rate, 74.1% and 81.8%. And there was no significant difference between the two groups in controling algal. In summary, using the dosage of 1.2Phl +80 mg/L DM phoslock?-diatomite can achieve better phosphorus removaling and algal controlling, In addition, it has a lower cost. So using phoslock?-diatomite is expected to be applied in the actual management of eutrophic water.