论文部分内容阅读
碱性高炉矿渣和多孔混凝土都有良好的净水性能,将碱性高炉矿渣作为掺合料制成掺高炉矿渣多孔混凝土(BSPC),对其处理模拟酸性水的效果进行研究。结果表明:经BSPC处理后,进水p H由2~3变成8.5~9.1。与普通多孔混凝土相比,添加高炉矿渣的混凝土对酸性水浊度、CODcr、TP和Cd的平均去除率依次提高了6.2%,8.8%,5.2%和4.5%,分别达到74.3%,74.5%,91.7%和86.5%。同时,BSPC孔隙率在处理酸性水前后有所下降,下降幅度较小,为6.2%,不影响BSPC对酸性水的处理。实验最后对混凝土表面白色絮状物进行了红外和XRD表征,初步分析其中含有CaCO_3、SiO_2和水化硅酸钙(C-S-H)等无机物,初步判定来源于BSPC的溶出物。
Alkaline blast furnace slag and porous concrete have good water purification performance. Alkaline blast furnace slag is used as admixture to make blast furnace slag porous concrete (BSPC), and its effect on treating simulated acidic water is studied. The results showed that after the BSPC treatment, the influent p H changed from 2 to 3 to 8.5 to 9.1. Compared with ordinary porous concrete, the average removal rate of CODcr, TP and Cd in concrete with blast furnace slag increased by 6.2%, 8.8%, 5.2% and 4.5% respectively, reaching 74.3% and 74.5% respectively, 91.7% and 86.5%. At the same time, the porosity of BSPC decreased slightly before and after the treatment of acidic water with the decrease rate of 6.2%, which did not affect the treatment of acid water by BSPC. Finally, the white floccules on the concrete surface were characterized by IR and XRD. The inorganic flocculants, including CaCO 3, SiO 2 and hydrated calcium silicate (C-S-H), were initially analyzed to determine the leachate originating from BSPC.