Road dust is a major source of particulate matter in urban air, and its contribution to smog cannot be ignored.On April 18, peninsula reporter came to the intersection of Qingdao north 4th road and yongping road to visit a new sweeper to clean the road.

Sweep once, the hand touch the ground not dirty

On the morning of the 18th, a road pollution removal vehicle was driving on the fourth stream north road. It looked different from the common road sweeper.Along the way, the road became wet, but there was hardly any water stain.A staff member squatted down, with his hand on the ground to touch, between the fingers clean;He put his hands on the ground to feel a few, raised his hand to see that it is still clean.

“It’s amazing. It feels as clean as a human face!”“One citizen sighed.Vehicle manufacturing fang fujian haishan machinery research institute dean yan binglei told the peninsula reporter, the road pollution clearance car can be big, like it in front of the public show, can be deep cleaning of the road surface, and can be the board dust and other sundry clean.“The car USES high efficiency compound turbine technology and high pressure jet technology, and its suction capacity is more than five times that of a normal cleaning car;High-pressure jets can harden roads, lift oil and dirt and suck it all away.”He said that in particular, the surface of the road is hard, greasy, and often the vehicle back and forth several times but can not completely clean up, and this car can solve the problem once.

In addition, the car can achieve multi-function operation, decontamination effect is good, deep cleaning, once filled with water, can work for an hour, water consumption is low, even in cold weather.“Deicing can be done in Harbin in winter, and in Qingdao in winter, it won’t cause the roads to freeze, because the strong suction force basically sucks the water away.”“Mr. Yan said.

Field test, data reduction is amazing

In order to intuitively illustrate the ability of road pollution removal vehicles, on the morning of 18th, licang branch office of ecological environment commissioned a third-party road dust detection company to conduct comparative detection of road dust before and after cleaning, and to analyze the effect.According to the test, the dust on the road without road pollution removal vehicle is 116 g/m2.

After the cleaning of the road surface, the staff use professional instruments to vacuum the road surface per unit area, and then use high-precision instruments for measurement.According to the report, dust on the road can contain PM10 and PM2.5, which are commonly known by people, and can cause dust when vehicles pass by.

According to 2018 statistics, dust accounted for 23% of PM2.5 in the air of licang district.Dust is the main source of PM10, accounting for 33%. Licang district is the only place for large vehicles, especially muck carriers, to enter and leave Qingdao. Road dust problem caused by transport leakage is very prominent.

Soon, the data was available: 0.5 grams per square meter.“This is so great, there’s almost nothing on the ground!”As soon as the figures were released, many people cried out.The staff introduced, can be in the traffic flow of the roadside, real-time measurement of such a number is somewhat unexpected, according to the current island city in accordance with the gram theory of net standard, “demonstration road” road road ground dust does not exceed 5 grams/square meter is considered to meet the standard, and the on-site detection figure is far below this standard.

Deep cleaning of key sections will be carried out

In the scene of the peninsula reporter interviewed li cang district sanitation company staff zhang daiqun, he said that the road pollution cleaning vehicles will continue to clean the road after a week of monitoring, if it can meet the relevant requirements, will consider the promotion of more than 20 key roads such as binhai road, ruijin road, chongqing road.