Heavy metals and sodium concentrations in soil and sunflower crops fertilized with sewage sludge. Research, Society and Development, [S. l.], v. 10, n. 12, p. e436101220734, 2021. DOI: 10.33448/rsd-v10i12.20734. Disponível em: https://www.rsdjournal.org/rsd/article/view/20734. Acesso em: 5 dec. 2025.