Climate Change & Agroecology Division, Department of Agricultural Environment, National Academy of Agricultural Science, RDA, 150 Suin-ro, Kwonsun-gu, Suwon 441-707, Republic of Korea.
J Environ Manage. 2010 Mar-Apr;91(4):791-7. doi: 10.1016/j.jenvman.2009.10.017. Epub 2009 Nov 25.
Despite the use of recyclable materials increasing worldwide, waste disposal to landfill remains the most common method of waste management because it is simple and relatively inexpensive. Although landfill disposal is an effective waste management system, if not managed correctly, a number of potential detrimental environmental impacts have been identified including soil and ground water contamination, leachate generation, and gas emissions. In particular, improper post-closure treatment of landfills or deterioration of the conventional clay landfill capping were shown to result in land degradation which required remediation to secure contaminants within the landfill site. Phytoremediation is an attractive technology for landfill remediation, as it can stabilize soil and simultaneously remediate landfill leachate. In addition, landfill phytoremediation systems can potentially be combined with landfill covers (Phytocapping) for hydrological control of infiltrated rainfall. However, for the successful application of any phytoremediation system, the effective establishment of appropriate, desired vegetation is critical. This is because the typically harsh and sterile nature of landfill capping soil limits the sustainable establishment of vegetation. Therefore, the physicochemical properties of landfill capping soils often need to be improved by incorporating soil amendments. Biosolids are a common soil amendment and will often meet these demanding conditions because they contain a variety of plant nutrients such as nitrogen, phosphate, potassium, as well as a large proportion of organic matter. Such amendment will also ameliorate the physical properties of the capping soils by increasing porosity, moisture content, and soil aggregation. Contaminants which potentially originate from biosolids will also be remediated by activities congruent with the establishment of plants and bacteria.
尽管全球可回收材料的使用量不断增加，但垃圾填埋仍然是最常见的废物管理方法，因为它简单且相对便宜。尽管垃圾填埋是一种有效的废物管理系统，但如果管理不当，已经确定了许多潜在的有害环境影响，包括土壤和地下水污染、渗滤液的产生以及气体排放。特别是，如果垃圾填埋场的后期处理不当或传统粘土垃圾填埋场封盖恶化，会导致土地退化，需要进行补救以确保垃圾填埋场内的污染物得到控制。植物修复是一种有吸引力的垃圾填埋场修复技术，因为它可以稳定土壤，同时修复垃圾渗滤液。此外，垃圾填埋场植物修复系统可以与垃圾填埋场覆盖物（植物封盖）结合使用，以控制渗透雨水的水文学特性。然而，为了成功应用任何植物修复系统，关键是要有效地建立合适的、期望的植被。这是因为垃圾填埋场封盖土壤的典型恶劣和无菌性质限制了植被的可持续建立。因此，通常需要通过添加土壤改良剂来改善封盖土壤的物理化学性质。生物固体是一种常见的土壤改良剂，通常可以满足这些苛刻的条件，因为它们含有各种植物养分，如氮、磷、钾，以及大量的有机物。这种改良剂还可以通过增加孔隙度、含水量和土壤团聚体来改善封盖土壤的物理性质。生物固体中潜在的污染物也将通过与植物和细菌建立相一致的活动得到修复。
