Filler improvement and purification effects of constructed rapid infiltration facility
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Purification effects of constructed rapid infiltration system with two main fillers (coarse sand or medium coarse sand) and different addition proportion (5%, 10%, or 15%) modifiers (sponge iron, blast furnace slag, or zeolite) on rainwater runoff were studied through filter column tests. A set of constructed rapid infiltration system test device was designed, which included 9 rainwater filter columns. The test results showed that the permeability of artificial fillers blended with modifiers could have the promotion with varying degrees. There were differences in the characteristics of the modifiers, so the artificial fillers blended with different modifiers had a significant difference for the purification effects on each pollutant. In view of the overall situations, the pollutant removal effects of artificial fillers with two or more modifiers had a smaller gap, and the reduction effects were good, ranging from 38.95 to 46.25% when the main filler is coarse sand and from 46.29 to 49.46% while main filler is medium coarse sand. It was worth noting that the artificial fillers blended with sponge iron showed a slight harden after prolonged used; however, it had little influence on the permeability and water purification effects.
KeywordsConstructed rapid infiltration system Rainwater runoff Purification effects Modifier Permeability
This research was financially supported by the National Natural Science Foundation of China (no. 51879215) and the Key Research and Development Project of Shaanxi Province (2017ZDXM-SF-073).
- Li JK, Li HE, Li YJ, Shen B (2016b) LID Technology for urban stormwater runoff purification and utilization-take Xi’an as an example. Science Press, Beijing (in Chinese)Google Scholar
- Li T, Zhu YC, Kang X, Long B (2016c) Research on the influencial factors of nitrate nitrogen in micro-polluted source water by sponge iron reduction. Indust Water Treat 36(11):85–89 (in Chinese)Google Scholar
- Luo FS, Xu XJ, Li XZ, Qiu M, Wang P, Chen N (2011) Micro-electrolysis treatment of copper smelting of heavy metals in wastewater. Technol Water Treat 37(3):100–104Google Scholar
- Ministry of Housing and Urban-Rural Development of the People’s Republic of China (2015) Technical guidelines for sponge city construction-construction of rainwater system for low impact development (trial implementation). China Construction Industry Publishing House, Beijing, pp 37–39 (in Chinese)Google Scholar
- Pang CC (2012) Pretreatment of fill compaction forming process in interval microelectrolysis. Hebei University of Engineering, Handan (in Chinese)Google Scholar
- Tang CL, Zhu YF, Zhang ZQ, Zhang YC (2007) Use of zero-valent iron for nitrate removal from the soil water in loess areas. Acta Sci Circumst 27(8):1292–1299 (in Chinese)Google Scholar
- Wang Z, Huang GH, An CJ, Chen L, Liu JL (2016a) Removal of copper, zinc and cadmium ions through adsorption on water-quenched blast furnace slag. Desalin Water Treat 48:1):1–1)14Google Scholar
- Zhao DH, Qiu QB, Wang YN, Huang M, Wu YH, Liu XJ, Jiang T (2016) Efficient removal of acid dye from aqueous solutions via adsorption using low-cost blast-furnace slag. Desalin Water Treat 57(58):1–10Google Scholar