Faculty of Environmental, Geomatic and Energy Engineering, Kielce University of Technology, 25-314 Kielce, Poland.
Faculty of Civil Engineering and Architecture, Kielce University of Technology, 25-314 Kielce, Poland.
Int J Environ Res Public Health. 2022 Sep 19;19(18):11829. doi: 10.3390/ijerph191811829.
More and more attention in sewage sludge management is being devoted to its environmental utilization. This approach is justified both from economic and environmental points of view. However, as with any method, there are certain possibilities and limitations. The goal of the natural utilization of sewage sludge is to recover the valuable agronomic properties and fertilizing potential of the sludge. The main aspect limiting the possibility of using sludge as a fertilizer is the heavy metal content. In this paper, an analysis of the risk of environmental contamination in the case of application of sewage sludge with different forms of sludge treatment was carried out. Risk indices such as Igeo and PERI, based on the comparison of total metal content in sludge and soil, as well as RAC and ERD indices, which take into account the mobility of metals in soil, were calculated. It was shown that high levels of potential risk and geoaccumulation indicators do not necessarily disqualify the use of sewage sludge, the key aspect is the form of mobility in which the heavy metals are found in the sludge, and this should be the only aspect taken into account for the possibility of their environmental use.
越来越多的人关注污水污泥管理，将其用于环境利用。从经济和环境角度来看，这种方法是合理的。然而，与任何方法一样，都存在一定的可能性和局限性。污水污泥自然利用的目标是回收污泥的有价值的农业属性和施肥潜力。限制将污泥用作肥料的可能性的主要方面是重金属含量。本文分析了在应用不同形式的污泥处理的情况下，环境受到污染的风险。基于污泥和土壤中总金属含量的比较，计算了风险指数如 Igeo 和 PERI，以及考虑土壤中金属迁移性的 RAC 和 ERD 指数。结果表明，高潜在风险和地质累积指标并不一定使污水污泥的使用不合格，关键方面是重金属在污泥中发现的迁移形式，这应该是唯一需要考虑的方面，以确定它们是否可以在环境中使用。
