Impacts of phoslock on sediment phosphorus release in Fuhe River

doi:10.3969/j.issn.1000-1565.2018.04.009

Abstract

Abstract: An experimental study on controlling the release of phosphorus from Fuhe river sediments using a new generation of phosphorus control agent SAE from US were conducted. The results showed that the concentrations of total phosphorus(TP), dissolved total phosphorus(DTP)and dissolved inorganic phosphorus(SRP)in overlying water of sediment decreased. With SAE added at 90 g/m² and 180 g/m², sediment phosphate release suppression efficiency reached 80%. Exchangeable phosphorus(Ex-P)and iron aluminum bound phosphorus(NaOH-P)were found to have the greatest potential of the phosphorus release. Calcium bound phoaphorus(HCl-P)content remained unchanged. When the phoslock SAE was added, the content of Ex-P and NaOH-P decreased, the content of HCl-P increased. Phoslock SAE changed the more easily released form of phosphorus into the more stable form. The risk of phosphorus released could be effectively reduced.

Key words: phoslock, sediment, phosphorus release

CLC Number:

WANG Junxia, ZHANG Yajuan,ZHANG Lei, WANG Yabin, LIU Cunqi. Impacts of phoslock on sediment phosphorus release in Fuhe River[J]. Journal of Hebei University (Natural Science Edition), 2018, 38(4): 396-402.

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