The Method of Producing Haydite by Sediment and the Performance Analysis

The component and mineral composition of the sediment from the Xihe River, Shenyang City was analyzed, and the feasibility for producing haydite by the sediment was investigated. The optimal production parameters were confirmed through orthogonal test by using specific surface area and loose bulk density as assessment indicators. The results showed that the main components of the sediment from the Xihe River met the chemical composition requirements of the general haydite basically, and thus the sediment could produce haydite. The optimal mixing ratio of sediment, calcium carbonate, sodium silicate and alumina was 500:10:20:1. Under the optimal condition, the specific surface area of the haydite was larger, and the adsorption capacity of PO43--P was 1 743.75 mg/kg, which was much higher than the adsorption capacity of the purchased haydite (675.00 mg/kg).