Influence of Heavy Metals Fraction on Quality of Composts

• Type: Chapter or Part of a Book
• Date: 2019

Authors

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

Book

Title: Wastes: Solutions, Treatments and Opportunities III

Pages: 293-300

Electronic ISBN: 9780429289798

Publisher: Taylor & Francis

Indexing

Scopus - 0 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8