Campos, Thaís creator Chaer, Guilherme creator Leles, Paulo dos Santos creator Silva, Marcelo creator Santos, Felipe creator text periodical abstract or summary bl. continuing eng ABSTRACT A promising use of biosolids is as organic fertilizer in agricultural and forestry activities. However, its composition might contain several pollutants, especially heavy metals, which may result in an increase in the concentrations of these elements in the soil and the risk of groundwater contamination. This study aimed to determine the leaching levels of ions in a Ferralsol (clayey texture) and in a Planosol (sandy texture). The experiment was conducted in a greenhouse at Embrapa Agrobiologia, Seropédica, Rio de Janeiro state. Soils were packed in PVC columns and received 2 L/column of biosolids. The concentrations of heavy metals present in the biosolids composition were below the limits established by the legislation (CONAMA 375). In addition, the performed simulations showed the absence of contamination risk of soil or groundwater and surface water, according to the limits allowed by CONAMA 375. However, it should be emphasized the potential of nitrate leaching. Keywords: contamination risk, chemical elements percolation, test with columns, risk analysis. Publicação on-line; 29 ref.; 3 tables; 1 illus.; Summary (En) CONTAMINAÇÃO SOLO LIXIVIAÇÃO ANÁLISE DE RISCO Rio de Janeiro-RJ Instituto de Florestas - UFRRJ 1994 2025-0453 1415-0980 / ISSN 2179-8087 0nline BR2026001314 v. 26(special number n.1) p. 1-10; (2019) https://www.scielo.br/j/floram/a/zfTSGnmzY4xSds8cpr8KkhQ/?format=pdf&lang=en https://www.scielo.br/j/floram/a/zfTSGnmzY4xSds8cpr8KkhQ/?format=pdf&lang=en BR-BrBNA 260504 20260504105025.0 eng