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报载某市几名工人入下水管道内作业,不幸均昏倒在管道内,经奋力抢救也终于一人死亡。经查,下水管道内的毒气是致病致死的祸首。 原来,长久未经清理的下水管道内都积存有大量垃圾,其中不乏有较多的粪便、较多的食物或食物残渣和其它有机物等。它们经长期沤泡、腐败、发酵出大量的硫化氖、甲烷、一氧化碳及二氧化碳等有害气体。这种混合毒气占据空间达10％以上时,人可立即发生中毒昏迷。严重者可数秒钟内或立即死亡。更何况下水管道内长久淤泥后本已没有多大空间,加上
Several workers in a city reported that they were working in the sewer pipes. Unfortunately, they all fainted in the pipes and finally died after struggling to rescue them. After investigation, the gas inside the sewer pipe is the culprit causing the disease to die. It turned out that a large amount of rubbish was accumulated in the sewage pipes which have not been cleaned for a long time. Many of them have more excrement, more food or food residues and other organic substances. They are long-term bubble, corruption, fermented a large number of neon sulfide, methane, carbon monoxide and carbon dioxide and other harmful gases. This mixture of poisonous gas occupy more than 10% space, people can immediately poisoning coma. Severe cases can be a few seconds or immediately died. Not to mention there is not much room for the long-term silt in the sewer pipe, plus