Air pollution from bus exhaust(one of main sources of urban haze) in Shantou City,Guangdong Province was surveyed,and the purification effect of a new device for removing soot particulates from bus exhaust was analyzed.The results show that the smoke intensity of all buses surveyed averages 3.59 m^(-1),exceeding the limit,and the maximum is 5.7 times higher than the limit.Among the buses inspected,the smoke intensity of 37%of buses is not up to standard.The removal rate of soot particulates from various buses equipped with the purification device averages 63.6%,and some buses are up to standard after their exhaust are purified,showing that the device has good purification effect.Therefore,installing the purification device in a bus is an effective way to control air pollution from bus exhaust and haze in a city.
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