Kang, Ku Lee, Chang-Gu Choi, Jae-Woo Hong, Seong-Gu Park, Seong-Jik 2024-01-20T02:32:31Z 2024-01-20T02:32:31Z 2021-09-05 2017-01 0049-6979 https://pubs.kist.re.kr/handle/201004/123254 The aim of this study was to investigate phosphate removal using crushed concrete granules (CCGs). The CCGs were thermally treated at different temperatures (300, 500, 700, and 900 degrees C) for 3 h under anoxic conditions. The results showed that CCGs thermally treated at 700 degrees C (700TT-CCGs) were the most effective for the removal of phosphate. The equilibrium adsorption data fitted well the Langmuir isotherm model with a maximum phosphate adsorption capacity of 21.522 mg/g, higher than that of granular adsorbents in the literature. In pH experiments, phosphate adsorption by 700TT-CCGs decreased as initial pH increased from 3 to 5, but sharply increased above pH 5 (final pH 9.1), which was favorable for the formation of calcium phosphate precipitate. The effect of competing anions on phosphate adsorption follows the order: HCO3- > SO42- > NO3-, which is consistent with the reverse order of the shared charge. Column experiments showed no breakthrough of phosphate in the column packed with half 700TT-CCGs and half sand for over 300 h. This study demonstrates that CCGs can be used for phosphate removal from aqueous solution after thermal treatment, which is a simple and cheap way to improve the phosphate removal capacity of CCGs. English Kluwer Academic Publishers Application of Thermally Treated Crushed Concrete Granules for the Removal of Phosphate: A Cheap Adsorbent with High Adsorption Capacity Article 10.1007/s11270-016-3196-1 1 Water, Air, & Soil Pollution, v.228, no.1 Water, Air, & Soil Pollution 228 1 N scie scopus 000390681700019 2-s2.0-85002738250 Environmental Sciences Meteorology & Atmospheric Sciences Water Resources Environmental Sciences & Ecology Meteorology & Atmospheric Sciences Water Resources Article BLAST-FURNACE SLAGS AQUEOUS-SOLUTION PHOSPHORUS REMOVAL WASTE-WATER FLY-ASH RED MUD IRON EQUILIBRIUM KINETICS CEMENT Crushed concrete Calcination Thermal treatment Phosphate Batch experiments Column experiments