| 摘要: |
| 研究了人工砂母岩岩性、粒径、石粉含量及比表面积、黏土矿物类型及含量对人工砂亚甲蓝值（MB值）的影响规律及机制.结果表明：人工砂母岩岩性、粒径对其MB值影响较小，人工砂石粉含量及比表面积对其MB值有一定影响；人工砂黏土矿物类型和含量对MB值的影响显著，其中膨胀性黏土（如蒙脱石）的吸附性能远远强于非膨胀性黏土（如伊利石），相同含量蒙脱石人工砂MB值是伊利石人工砂的10倍左右.对于MB值超标的人工砂，降低其MB值的关键在于控制其中膨胀性黏土矿物的掺入及其他种类黏土矿物的含量. |
| 关键词: 人工砂 MB值 石粉 黏土 膨胀性 吸附性能 |
| DOI：10.3969/j.issn.1007-9629.2023.01.010 |
| 分类号:TU528.01 |
| 基金项目:国家自然科学基金资助项目（U2040222，52179122）；中央级公益性科研院所基本科研业务费（CKSF2019374/CL，CKSF2019394/GC） |
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| Study on Influential Mechanism of Artificial Sand MB Value |
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LI Jiazheng, GONG Dexin, LIN Yuqiang, LI Yang, SHI Yan
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Institute of Materials and Structure， Changjiang River Scientific Research Institute of Changjiang Water Resources Commission， Wuhan 430010，China
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| Abstract: |
| The influential law and mechanism about rock lithology， particle size， stone powder content and specific surface area， clay mineral type and content of artificial sand on the methylene blue value（MB value） were studied. The results show that rock lithology and particle size of artificial sand have less influence on MB value， stone powder content and specific surface area of artificial sand have some influence on MB value； clay mineral type and content affect significantly the artificial sand MB value. Adsorption performance of expansile clay（such as montmorillonite） is much stronger than that of non-expansile clay（such as illite）， the MB value of montmorillonite artificial sand is about 10 times that of illite artifical sand with the same content. For artificial sand with excessive MB value， the key to reducing its MB value is to control the addition of expansile clay minerals and control the content of other kinds of clay minerals. |
| Key words: artificial sand MB value stone powder clay expansibility adsorption performance |
