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Improvement of desalinization performance in reclaimed land through recycling of bottom ash and oyster shells
Paddy and Water Environment ( IF 2.2 ) Pub Date : 2021-04-11 , DOI: 10.1007/s10333-021-00852-9
Taejin Kim , Donggeun Kim , Jihun Jeon , Younghwan Son

Reclaimed land and coastal soils have characteristics of poor drainage and high salinity because they are adjacent to the ocean. As salty soil hinders growth of crops, it is necessary to improve drainage performance and desalinize the soil for efficient use of reclaimed land. Bottom ash and oyster shells are produced in significant amounts as by-products and wastes in Korea each year and, if left unattended, can cause environmental problems. Because these materials are large in size, particle size distribution and permeability of the soil can be improved by mixing of such ash and shells. Carbonate, a main component of oyster shell, is known to promote granulation of soil particles and can affect the grain size distribution of the soil. In addition, bottom ash has a porous structure that can improve permeability when it is mixed with soil. Therefore, several experiments and numerical analyses were performed in this study on use of bottom ash and oyster shells as soil improvement materials and drainage materials to improve the desalinization efficiency of reclaimed land. Permeability was improved by about 2.7 times at a 20% mixing ratio and by about 5.5 times at a 40% mixing ratio of oyster shell, and bottom ash was most suitable and effective when used as a material for the drainage layer. Desalinization efficiency was highest when mixing oyster shells at a 40% ratio and using bottom ash for drainage, which increased the efficiency by approximately 2.6 times over 10 days. In conclusion, reuse of bottom ash and oyster shell could improve the efficiency of reclaimed land use.



中文翻译:

通过回收底灰和牡蛎壳来改善开垦土地的脱盐性能

开垦土地和沿海土壤由于与海洋相邻,因此排水性差且盐分高,具有特征。由于盐渍土阻碍了农作物的生长,因此有必要改善排水性能并对土壤进行脱盐处理,以有效利用开垦土地。在韩国,每年产生大量底灰和牡蛎壳作为副产品和废料,如果不加注意,会造成环境问题。由于这些材料的尺寸较大,因此可以通过混合这些灰和壳来改善土壤的粒径分布和渗透性。碳酸盐是牡蛎壳的主要成分,众所周知,它可以促进土壤颗粒的造粒,并可以影响土壤的粒度分布。另外,底灰具有多孔结构,当其与土壤混合时可以提高渗透性。因此,本研究利用底灰和牡蛎壳作为土壤改良材料和排水材料,以提高开垦土地的脱盐效率,进行了一些实验和数值分析。在牡蛎壳的20%的混合比下,渗透率提高了约2.7倍,在40%的混合比下,渗透率提高了约5.5倍,并且当用作排泄层的材料时,底灰是最合适和有效的。当以40%的比例混合牡蛎壳并使用底灰进行排水时,脱盐效率最高,这在10天内将效率提高了约2.6倍。总之,底灰和牡蛎壳的再利用可以提高开垦土地的利用效率。本研究利用底灰和牡蛎壳作为土壤改良材料和排水材料,以提高开垦土地的脱盐效率,进行了一些实验和数值分析。在牡蛎壳的20%的混合比下,渗透率提高了约2.7倍,在40%的混合比下,渗透率提高了约5.5倍,并且当用作排泄层的材料时,底灰是最合适和有效的。当以40%的比例混合牡蛎壳并使用底灰进行排水时,脱盐效率最高,这在10天内将效率提高了约2.6倍。总之,底灰和牡蛎壳的再利用可以提高开垦土地的利用效率。本研究利用底灰和牡蛎壳作为土壤改良材料和排水材料,以提高开垦土地的脱盐效率,进行了一些实验和数值分析。在牡蛎壳的20%的混合比下,渗透率提高了约2.7倍,在40%的混合比下,渗透率提高了约5.5倍,并且当用作排泄层的材料时,底灰是最合适和有效的。当以40%的比例混合牡蛎壳并使用底灰进行排水时,脱盐效率最高,这在10天内将效率提高了约2.6倍。总之,底灰和牡蛎壳的再利用可以提高开垦土地的利用效率。在牡蛎壳的20%的混合比下,渗透率提高了约2.7倍,在40%的混合比下,渗透率提高了约5.5倍,并且当用作排泄层的材料时,底灰是最合适和有效的。当以40%的比例混合牡蛎壳并使用底灰进行排水时,脱盐效率最高,这在10天内将效率提高了约2.6倍。总之,底灰和牡蛎壳的再利用可以提高开垦土地的利用效率。在牡蛎壳的20%的混合比下,渗透率提高了约2.7倍,在40%的混合比下,渗透率提高了约5.5倍,并且当用作排泄层的材料时,底灰是最合适和有效的。当以40%的比例混合牡蛎壳并使用底灰进行排水时,脱盐效率最高,这在10天内将效率提高了约2.6倍。总之,底灰和牡蛎壳的再利用可以提高开垦土地的利用效率。在10天内,效率提高了约2.6倍。总之,底灰和牡蛎壳的再利用可以提高开垦土地的利用效率。在10天内,效率提高了约2.6倍。总之,底灰和牡蛎壳的再利用可以提高开垦土地的利用效率。

更新日期:2021-04-11
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