改性火山岩生态混凝土净水性能的试验研究
An experimental study on water purification performance of modified volcanic rock ecological concrete.
作者信息
Liu Fei Peng, Xu Jing, Zhao Jian Xin, Liu Li Feng, Zhang Meng Ya, Tan Shu Cheng
机构信息
Institute of International Rivers and Eco-Security, Yunnan University, Kunming, 650500, China.
Southwest Investigation and Planning Institute, National Forestry and Grassland Administration, Kunming, 650031, China.
出版信息
Sci Rep. 2025 Jan 7;15(1):1092. doi: 10.1038/s41598-024-82315-9.
Eco-concrete is an engineered porous material, often used in pervious pavement and slope protection. Volcanic rock, due to its loose and porous structure, can absorb pollutants and improve the performance of eco-concrete. Here, this study determined the performance of eco-concrete modified with different contents of volcanic rock in sewage purification. The results showed that eco-concrete purified sewage, and that adding volcanic rock further improved the removal capacity of total nitrogen (TN), total phosphorus (TP), and chemical oxygen demand (COD) by 34.1, 47.3, and 6%, respectively. The water purification mechanism of volcanic rock eco-concrete (VREC) was mainly physical water absorption (mechanical retention) and microbial degradation. With the increase in the content of cement slurry, the adsorption amount decreased, porosity decreased, and strength increased, gradually not meeting the engineering application requirements. Therefore, the high porosity volcanic rock eco-concrete (VREC) had the best water purification performance. The result conclude that eco-concrete should be prepared with an admixture of volcanic rock with 30% porosity for the best sewage purification results.
生态混凝土是一种工程多孔材料，常用于透水路面和边坡防护。火山岩由于其松散多孔的结构，能够吸收污染物并改善生态混凝土的性能。在此，本研究测定了不同火山岩含量改性的生态混凝土在污水净化中的性能。结果表明，生态混凝土能净化污水，添加火山岩进一步提高了总氮（TN）、总磷（TP）和化学需氧量（COD）的去除能力，分别提高了34.1%、47.3%和6%。火山岩生态混凝土（VREC）的水净化机制主要是物理吸水（机械截留）和微生物降解。随着水泥浆含量的增加，吸附量降低，孔隙率降低，强度增加，逐渐不符合工程应用要求。因此，高孔隙率火山岩生态混凝土（VREC）具有最佳的水净化性能。结果表明，应制备孔隙率为30%的火山岩掺合料生态混凝土以获得最佳污水净化效果。
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