Abstract
This chapter describes the high-performance phosphorus adsorbent, PAdeCS®, which is produced from concrete sludge. The concrete sludge is a slurried, strong alkali waste that is generated in a concrete pole and pile manufacturing plant in Japan. PAdeCS® is a powdery granulate that can be used as a phosphorus-recovery agent for dissolved phosphate. The precipitation of hydroxyapatite is the dominant mechanism for phosphate removal from aqueous solution by PAdeCS®. Because of the high calcium content of PAdeCS®, the recovered phosphorus product can be used as a slow-release phosphorus fertilizer. The phosphorus-removal performance of PAdeCS® was compared with that of conventional phosphorus-removal agents such as polyferric sulfate, aluminum polychloride, and aluminum sulfate. PAdeCS® showed the highest phosphorus-removal performance among them. PAdeCS®, which is produced from concrete sludge, can be used widely as an inexpensive phosphorus-recovery agent.
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Iizuka, A., Yoshida, H., Hayakawa, Y. (2019). High-Performance Phosphorus Adsorbent Based on Concrete Sludge. In: Ohtake, H., Tsuneda, S. (eds) Phosphorus Recovery and Recycling . Springer, Singapore. https://doi.org/10.1007/978-981-10-8031-9_31
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DOI: https://doi.org/10.1007/978-981-10-8031-9_31
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