Uragoda C G
Central Chest Clinic, Colombo, Sri Lanka.
Thorax. 1989 Apr;44(4):303-4. doi: 10.1136/thx.44.4.303.
Activated carbon is made in Sri Lanka by passing steam through charcoal made from coconut shells. The carbon does not contain free silica. Sixty six men who had worked in a factory making activated carbon for an average of 7.2 years had no more respiratory symptoms than a control group, and none showed radiological evidence of pneumoconiosis. There was no evidence that people exposed to charcoal and pure carbon for up to 11 years are at risk of developing pneumoconiosis.
活性炭在斯里兰卡是通过让蒸汽通过由椰子壳制成的木炭来生产的。这种碳不含游离二氧化硅。66名在一家生产活性炭的工厂工作平均7.2年的男性，其呼吸道症状并不比对照组更多，且没有人有尘肺病的放射学证据。没有证据表明接触木炭和纯碳长达11年的人有患尘肺病的风险。
