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DOI : ,    Vol.21, No.1, 31 ~ 38, 2013
Title
Adsorption of Phosphorus Release from Paddy Soil Submerged by Dam Construction Using Water Works Sludge
서정인 Jung In Suh
Abstract
To evaluate the application of a water works sludge to prevent phosphorus release from paddy soil submerged by dam construction under oxic and anoxic conditions, laboratory incubation experiments using BOD bottle were conducted for 45 days. Under anoxic condition, the release rate was enhanced 2 times for phosphorus over oxic condition. However, water works sludge addition to the paddy soil led to reduced release of phosphorus in the anoxic condition. Also, during the adsorption process, decrease of total phosphorus concentration in overlying water, accompanied with an increase in pH values and concentration of sulfate, chloride and TOC by ligand exchange. Therefore, there was no excessive release of anion such as sulfate and chloride during the adsorption of phosphorus. The results indicated that water works sludge can further be used as adsorbent media for phosphorus removal in the paddy soil submerged by dam construction.
Key Words
Water work sludge, Phosphorus, Paddy soil, Oxic and anoxic condition, Dam construction
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