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Evaluation of the recyclability of construction and demolition waste fines as a garden substrate and soil amendment agent: a case study from the Republic of Korea
Journal of Material Cycles and Waste Management ( IF 3.1 ) Pub Date : 2019-11-13 , DOI: 10.1007/s10163-019-00941-2
Suekyoung Yun , Donsik Ryu , Jeehyeong Khim

Construction and demolition waste fines (CDWF) account for approximately 15% of landfill waste, and are likely to generate H2S during decomposition. In Korea, CDWF disposal depends mostly on landfill sites. Therefore, the purpose of this study was to investigate the possibility of using CDWF as a substrate for plant growth or soil amendment agent for the improvement of reclaimed land. Experiments were conducted on the growth of three plant species in garden soil mixed with CDWF. Because of the high salinity of CDWF, the heights of all plants decreased as the mixing ratio of CDWF increased. However, the Chrysanthemum morifolium growing in only CDWF showed similar or slightly lower dry weight compared to the control specimens. Upon evaluating the applicability of CDWF to the improvement of reclaimed soil with a column test, the saturated hydraulic conductivity (Ksat) and removal rate of cations from the soil were found to increase as the CDWF mixing ratio increased because of the Ca2+ contained in the CDWF. These results suggest that it is possible to reduce both the amount of landfill and the H2S generation using previously landfilled CDWF.



中文翻译:

评价作为建筑底材和土壤改良剂的建筑和拆除废料的可回收性:大韩民国的案例研究

建筑和拆除废料细微粒(CDWF)占的填埋垃圾约15%,并有可能产生H 2分解过程中S上。在韩国,CDWF的处置主要取决于垃圾掩埋场。因此,本研究的目的是研究将CDWF用作植物生长基质或土壤改良剂以改善开垦土地的可能性。进行了三种植物物种在CDWF混合的花园土壤中生长的实验。由于CDWF的高盐度,所有植物的高度都随着CDWF混合比的增加而降低。然而,菊花与对照样品相比,仅在CDWF中生长的干重表现出相似或略低的干重。通过柱试验评估CDWF对改良复垦土壤的适用性后,发现饱和水导率(K sat)和阳离子从土壤中的去除率随CDWF混合比的增加而增加,这是因为所含的Ca 2+在CDWF中。这些结果表明,使用先前的填埋的CDWF可以减少填埋的数量和H 2 S的产生。

更新日期:2019-11-13
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