鉱物・廃棄物を利用した高効率水質浄化材料の開発 Development of

飯塚淳
助教
Atsushi IIZUKA
Assistant Professor
東北大学多元物質科学研究所
Institute of Multidisciplinary Research for Advanced Materials Tohoku University
サステナブル理工学研究センター
Research Center for Sustainable Materials & Engineering
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資源循環
リサイクル
廃水処理
Resource circulation
Recycling
Water treatment
鉱物・廃棄物を利用した高効率水質浄化材料の開発
Development of high-efficiency water purification materials
工業廃水や休廃止鉱山廃水等には有害な重金属や各種陰イオンが含有されており、それらの処理を低コストで効率よく行う
ことは大変困難です。あるいはリン等の有用な元素が回収されることなく廃棄されています。これらを解決する新たな技術
開発が望まれています。
Industrial waste water or acid mine drainage often contains harmful heavy metals and anions which should be
removed before their disposal. In other case, important resources, such as phosphorus contained in waste water are
disposed of without recovering. High-efficient and low cost treatment methods for waste water is now required.
鉱物の一種であるエトリンガイトのイオン交換能を利用した水質浄化プロセス構築を目指した研究を行っています。低粒径
化や加熱処理による性能向上を図り、実廃水を対象とした試験を進めています。また、廃棄物であるコンクリートスラッジ
と CO2 を利用して新規脱リン材(PAdeCS)を製造し、廃水からのリン回収試験を進めています。
The main objective of my research is to develop a high-efficiency water purification material utilizing the ettrinigite
structure. Improvement of its performance by decreasing particle size and heat treatment is investigated. Phosphorus
recovery from waste streams is also investigated using a newly developed phosphorus adsorbent (PAdeCS).
Fig.1. SEM image of the synthesized ettrigite.
Ettrigite crystal is needle-shape, and has a larger
surface area. Metaettringite, decomposition
product of the ettringite can be easily obtained by
heat treatment under lower temperatures
(<100oC).
Fig.2. Boron removal performances of
ettrigite and metaettringite. Metaettringite
has an amorphous structure, and has a
higher boron removal performance than
ettrigite.
Fig.3. Newly developed adsorbent, PAdeCS for
phosphorus recovery from waste water. The
PAdeCS particles can be produced from concrete
sludge and carbon dioxide, thus the production
cost is lower.
Ind. Eng. Chem. Res., 53, 4046 (2014). Kagaku Kogaku Ronbunshu, 40, 443 (2014). Waste Management, 34, 1829 (2014).
Int. J. Chem. Eng. App., 5, 298 (2014). Ind. Eng. Chem. Res., 51, 11266 (2012). Chem. Eng. J., 200-202, 338 ( 2012).
[email protected]
http://www.tagen.tohoku.ac.jp/labo/nakamura/iizuka/index.html

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