An experimental study on water purification performance of modified volcanic rock ecological concrete

被引:0
|
作者
Liu, Fei Peng [1 ,2 ]
Xu, Jing [1 ]
Zhao, Jian Xin [2 ]
Liu, Li Feng [1 ]
Zhang, Meng Ya [1 ]
Tan, Shu Cheng [1 ,3 ,4 ]
机构
[1] Yunnan Univ, Inst Int Rivers & Ecosecur, Kunming 650500, Peoples R China
[2] Southwest Invest & Planning Inst, Natl Forestry & Grassland Adm, Kunming 650031, Peoples R China
[3] Yunnan Univ, Sch Earth Sci, Kunming 650500, Peoples R China
[4] Yunnan Int Joint Lab Crit Mineral Resource, Kunming 650500, Peoples R China
来源
SCIENTIFIC REPORTS | 2025年 / 15卷 / 01期
关键词
Volcanic rock; Eco-concrete; Water purification; Laboratory experimental study; PERVIOUS CONCRETE; PLANT-GROWTH; BIOCHAR; REMOVAL; CEMENT; RUNOFF; CARBON;
D O I
10.1038/s41598-024-82315-9
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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.
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页数:14
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