種別 国内論文 No. 50 年度 2011
論文名 生物由来カルシウム系セラミックス担体のカルシウム溶脱及びアンモニア・リンの吸着に関する評価
Evaluation on Elution of Calcium from Creature Origin Calcium-Ceramics Carrier and Its Adsorptivity for Ammonia and Phosphorous
著者名 森勝伸、原知里、黒須東、杉田剛、中谷暢丈、田中一彦、松本富美雄、伊藤司、板橋英之
掲載誌名 工業用水
閉鎖水域における富栄養化を防止するため、原因となる栄養塩類濃度を低減する技術が必須である。水のpHを弱塩基性に保ちながらアンモニア及びリンを吸着できる浄化担体を開発した。ホタテ貝殻粉末(SSP)をカルシウム源としたカルシウム系セラミックス担体(CC担体)である。SSPの混合割合が30%、焼成温度が900℃で作製した担体において、180日間水に浸漬しても安定に水質を維持させることができ、高い吸着能を示した。
This study has investigated the capability of a creature originated calcium ceramics (CC) carrier including a scallop shell powder (SSP) with clay. The durability and adsorptivity of CC carrier in aqueous solution were strongly affected by the amount of SSP mixed with clay and the sintering temperature. The CC carrier made with higher amount of SSP had higher adsorptivity for ammonia and phosphorous, but the durability was low due to elution of a large amount of Ca2+from CC carriers in water solution. The carrier sintered at higher temperature had high durability, but the adsorptivity was extremely low. Consequently, the CC carrier mixed with 30 wt% SSP and sintered at 900 ℃ could maintain the stable water quality even after water dipping for 180 days, and could obtain high adsorptivity for ammonia and phosphorous.