Low-Oxygen Atmosphere and its Predictors among Agricultural Shallow Wells in Northern Thailand
Safety and Health at Work
;
: 18-24, 2015.
Artigo
em Inglês
| WPRIM
| ID: wpr-38881
ABSTRACT
BACKGROUND:
In 2006, three farmers died at the bottom of an agricultural shallow well where the atmosphere contained only 6% oxygen. This study aimed to document the variability of levels of oxygen and selected hazardous gases in the atmosphere of wells, and to identify ambient conditions associated with the low-oxygen situation.METHODS:
A cross-sectional survey, conducted in June 2007 and July 2007, measured the levels of oxygen, carbon monoxide, hydrogen sulfide, and explosive gas (percentage of lower explosive limit) at different depths of the atmosphere inside 253 wells in Kamphaengphet and Phitsanulok provinces. Ambient conditions and well use by farmers were recorded. Carbon dioxide was measured in a subset of wells. Variables independently associated with low-oxygen condition (2 days vs. 25,000 ppm) in seven wells with a low oxygen level.CONCLUSION:
Oxygen concentrations in the wells vary widely even within a small area and decrease with increasing depth.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Oxigênio
/
Atmosfera
/
Solo
/
Tailândia
/
Dióxido de Carbono
/
Monóxido de Carbono
/
Água
/
Modelos Logísticos
/
Estudos Transversais
/
Espaços Confinados
Tipo de estudo:
Estudo observacional
/
Estudo de prevalência
/
Estudo prognóstico
/
Fatores de risco
País/Região como assunto:
Ásia
Idioma:
Inglês
Revista:
Safety and Health at Work
Ano de publicação:
2015
Tipo de documento:
Artigo
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