With the rapid development of China's social economy, the acceleration of urbanization, the increasing living standards of the people, and the continuous enrichment of the material foundation, more problems have emerged, one of which is the continuous increase of garbage, which has become a major obstacle to improving the quality of life of the Chinese people. With the increasing emphasis on garbage classification in China, it has become a trend to treat construction waste as a separate type of garbage.
Due to the traditional disposal methods of construction waste in China, such as landfilling or stacking, the treatment results are not ideal and cannot effectively recycle resources, resulting in secondary pollution. And there are many informal landfills. With the passage of time, the demand for land use is increasing, and the requirements for environmental protection are becoming increasingly strict. The problems exposed by landfills themselves are also increasing. Many landfills in our country are already in a closed state, and the problems of leachate pollution, air pollution, soil pollution, and various bacterial and microbial contamination generated by these landfills are becoming increasingly serious.
1. Safety hazards
The location of most urban construction waste dumping sites has safety hazards. Too many places around the construction site have become temporary dumping points for construction waste. Due to the lack of protective measures and external factors, it is very likely to cause the collapse of the garbage dump, obstruct roads, and even rush towards other construction waste.
2. Water resource pollution
During the process of stacking and landfilling construction waste, the long-term fermentation and erosion of rainwater, as well as the infiltration of surface water, can cause severe pollution to the surrounding water quality. The leachate from garbage not only contains a large amount of organic pollutants, but also a large amount of metal and non-metal pollutants, resulting in complex water composition and various harmful substances such as heavy metals exceeding the standard. If this polluted water is consumed for a long time, it can cause significant harm to the body.
3. Reduce soil quality
With the increase of construction waste, the scope of garbage dumps is gradually expanding. Most suburban garbage dumps are mostly piled up outdoors. Through long-term exposure to sunlight and rain, harmful substances in garbage seep into the soil layer through leachate, resulting in a series of physical, chemical, and biological effects. They are either digested and absorbed by vegetation roots or generated and absorbed by microbial strains, leading to soil pollution and ultimately reducing soil quality. In addition, the construction waste accumulated outdoors, under the action of external forces, smaller stone blocks will also enter the surrounding soil layer, changing the material composition of the soil layer, damaging the soil texture, and reducing the production resistance of the soil layer. In addition, heavy metals in garbage will undergo chemical changes under various factors, leading to an increase in heavy metal content in the soil layer and an increase in heavy metal content in crops.
So, the sorting and treatment of construction waste is a proper method that society urgently needs.
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