Mercury in rice paddy fields and how does some agricultural activities affect the translocation and transformation of mercury - A critical review.
Ecotoxicol Environ Saf
; 202: 110950, 2020 Oct 01.
Article
en En
| MEDLINE
| ID: mdl-32800226
ABSTRACT
Human exposure to methylmercury (MeHg) through rice consumption is raising health concerns. It has long been recognized that MeHg found in rice grain predominately originated from paddy soil. Anaerobic conditions in paddy fields promote Hg methylation, potentially leading to high MeHg concentrations in rice grain. Understanding the transformation and migration of Hg in the rice paddy system, as well as the effects of farming activities, are keys to assessing risks and developing potential mitigation strategies. Therefore, this review examines the current state of knowledge on 1) sources of Hg in paddy fields; 2) how MeHg and inorganic Hg (IHg) are transformed (including abiotic and biotic processes); 3) how IHg and MeHg enter and translocate in rice plants; and 4) how regular farming activities (including the application of fertilizer, cultivation methods, choice of cultivar), affect Hg cycling in the paddy field system. Current issues and controversies on Hg transformation and migration in the paddy field system are also discussed.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Oryza
/
Contaminantes del Suelo
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Monitoreo del Ambiente
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Producción de Cultivos
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Mercurio
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Compuestos de Metilmercurio
Límite:
Humans
Idioma:
En
Revista:
Ecotoxicol Environ Saf
Año:
2020
Tipo del documento:
Article