Effects and Mechanisms of Different Types of Biochar on Heavy Metal Passivation during Sludge Composting.
Bull Environ Contam Toxicol
; 113(2): 26, 2024 Aug 12.
Article
en En
| MEDLINE
| ID: mdl-39133274
ABSTRACT
The effects and mechanisms of the different types of biochar on heavy metal passivation are still not fully understood. This study compared the effects of three types of biochar on heavy metal passivation during sludge composting. Compared with composting without biochar, rice husk biochar was most effective for the passivation of Zn and Pb, with increased passivation rates of 1.90% and 20.43%, respectively. In contrast, sludge biochar was the most effective for the passivation of Cr and Hg, with increased passivation rates of 28.30% and 3.09%, respectively. Coconut shell biochar showed the best performance for the passivation of Cu, Ni, As, and Cd, and was enriched with micropore structures, which possibly led to the adsorption and reaction of heavy metals, organic matter, and microorganisms. The improved passivation effect of the rice husk and sludge biochar on heavy metals can be attributed to the improved humification of organic matter. This study suggests that specific types of biochar should be considered for the passivation of different types of heavy metals for practical applications.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aguas del Alcantarillado
/
Contaminantes del Suelo
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Compostaje
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Carbón Orgánico
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Metales Pesados
Idioma:
En
Revista:
Bull Environ Contam Toxicol
Año:
2024
Tipo del documento:
Article
País de afiliación:
China