Influence of Heavy Metals Fraction on Quality of Composts

• Tipo: Capítulo ou Parte de Livro
• Data: 2019

Autores

Elisabete L. Silva (Autor) Outra; I. Brás (Autor) Outra; Ana Cristina Cunha Queda (Autor) Outra; Olga C. Nunes (Autor) FEUP

Livro

Título: Wastes: Solutions, Treatments and Opportunities III

Páginas: 293-300

ISBN Eletrónico: 9780429289798

Editora: Taylor & Francis

Indexação

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00R-RSA

DOI: 10.1201/9780429289798-47

Abstract (EN): In this study the fractionation of the heavy metals in four commercial composts was assessed. The heavy metals mobility that most influenced the chemical composition of humic-like substances (HS-like) and the physicochemical, maturity and stability properties of the composts were identified. The heavy metals fractionation was performed following the modified sequential BCR (Community Bureau of Reference) extraction, which permitted to quantify the elemental concentration in the exchangeable/bioavailable, reducible, oxidisable and residual fractions. Cu, Ni, Cr and Pb were most abundant in the immobile phases, while Zn showed no dominant chemical phase. The HS-like chemical composition was influenced negatively by the residual fraction of Cu, Pb, and mainly Cr. The type or mobility of the heavy metals did not show any influence on composts maturity. However, mobile forms of Zn and Pb were correlated with high moisture content and low stability, respectively as well as with the increase of compost phytotoxicity. © 2020 Taylor & Francis Group, London, UK.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8