The Influence of Redox Potential on Phosphorus Release from Sediments in Different Water Bodies
26 Pages Posted: 13 Mar 2024
Abstract
Due to years of anthropogenic impact, many water bodies have sediment rich in phosphorus. The redox potential (Eh) is crucial for determining the adsorption or release of phosphorus from sediments. This study examines the effects of Eh variations under aerobic and anaerobic conditions on the phosphorus release dynamics in different water bodies (rivers, lakes, and reservoirs). Findings include: (1) In sediment-overlying water systems, Eh shows an inverse trend with pH, also affecting metal concentrations; (2) Under anaerobic conditions, sediments release more phosphorus, with iron being a key factor in Eh-regulated phosphorus release; (3) The phosphorus adsorption capacity of lake and reservoir sediments is sensitive to changes between aerobic and anaerobic environments. To prevent algal blooms, stricter regulatory measures are recommended during water level fluctuations in lakes and reservoirs.
Keywords: Redox Environment, Phosphorus Forms, sediments, Adsorption Capacity
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