Sewage sludge (SS) from wastewater treatment plants (WWTPs) has important soil-forming and fertilizing properties. However, it may not always be used for this purpose. One of the main reasons why SS cannot be used for natural purposes is its heavy metal (HM) content. SS from the wastewater treatment plant in Poland was subjected to an analysis of the potential anthropogenic hazard of HMs, especially in terms of their mobility and accumulation in soil. Calculations were made for the concentrations of HMs in SS from the analyzed wastewater treatment plants and in arable soil from measurement points in places of its potential use. The geoaccumulation index (GAI), potential environmental risk index (PERI), risk assessment code (RAC) and environmental risk determinant (ERD) were calculated. Then the values of the indicators were compared with the mobility of HMs, which was the highest risk of soil contamination. It was shown that a high level of potential risk and geoaccumulation indicators did not necessarily disqualify the use of SS, provided that HMs were in immovable fractions.

中文翻译：

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波兰部分污水处理厂污水污泥重金属积累风险分析

来自污水处理厂 (WWTP) 的污水污泥 (SS) 具有重要的土壤形成和施肥特性。但是，它可能并不总是用于此目的。SS 不能用于自然用途的主要原因之一是其重金属 (HM) 含量。对来自波兰废水处理厂的 SS 进行了 HM 潜在人为危害的分析，特别是在它们在土壤中的流动性和积累方面。对来自分析的污水处理厂的 SS 和耕地土壤中 SS 中 HMs 的浓度进行了计算，该浓度来自其潜在使用地点的测量点。计算了地质积累指数（GAI）、潜在环境风险指数（PERI）、风险评估代码（RAC）和环境风险决定因素（ERD）。然后将指标值与HMs的迁移率进行比较，HMs是土壤污染的最高风险。结果表明，高水平的潜在风险和地质积累指标并不一定取消 SS 的使用资格，前提是 HM 处于不可移动部分。