Beijing-Tianjin-Hebei region is a capital economic circle for the future. Promoting the coordinated development of its population, economy, resources and environment is a major national strategy. And as towns and cities continue to expand, the volume of construction waste is gradually expanding, posing a major challenge to the sustainable development of the construction industry. In order to solve this problem, this paper used portable XRF to realize the on-site rapid monitoring of heavy metals in construction waste, and the correlation analysis result was R2 = 0.9622. The visualization of enrichment factor evaluation results was realized through ArcGIS. Beijing-Tianjin-Hebei region is mainly polluted by heavy metal elements Cr, Zn, Pb and Hg, showing regional pollution characteristics. The reason can be traced to the heavy industrial production in Tangshan, which is in line with the principle of industrial ecology. The results of leaching toxicity and cation anion analysis showed that the construction waste in Beijing-Tianjin-Hebei region had environmental risks to the surrounding surface water and groundwater. The resource treatment and disposal path were determined by means of XRD, ternary phase diagram and oxide composition analysis to avoid secondary pollution. This study explores the environmental properties and resource utilization pathways of construction waste in the Beijing-Tianjin-Hebei region, laying the foundation for research work on construction waste in the development of national urban agglomerations, effectively solving regional environmental pollution problems, and promoting the sustainable development of the construction industry.
Beijing-Tianjin-Hebei region is a capital economic circle for the future. Promoting the coordinated development of its population, economy, resources and environment is a major national strategy. And as towns and cities continue to expand, the volume of construction waste is gradually expanding, posing a major challenge to the sustainable development of the construction industry. In order to solve this problem, this paper used portable XRF to realize the on-site rapid monitoring of heavy metals in construction waste, and the correlation analysis result was R 2 = 0.9622. The visualization of enrichment factor evaluation results was realized through ArcGIS. Beijing-Tianjin-Hebei region is mainly polluted by heavy metal elements Cr, Zn, Pb and Hg, showing regional pollution characteristics. The reason can be traced to the heavy industrial production in Tangshan, which is in line with the principle of industrial ecology. The results of leaching toxicity and cation anion analysis showed that the construction waste in Beijing-Tianjin-Hebei region had environmental risks to the surrounding surface water and groundwater. The resource treatment and disposal path were determined by means of XRD, ternary phase diagram and oxide composition analysis to avoid secondary pollution. This study explores the environmental properties and resource utilization pathways of construction waste in the Beijing-Tianjin-Hebei region, laying the foundation for research work on construction waste in the development of national urban agglomerations, effectively solving regional environmental pollution problems, and promoting the sustainable development of the construction industry. forming a technical system with regional characteristics to solve the problem of resource and environmental pollution in the process of national construction and development. Experimental Sample collection and pretreatment Sample collectionAs shown in Fig. 1, construction waste sampling sites are mainly concentrated in the Beijing-Tianjin-Hebei region of China, according to the principle of uniform grid placement. Among them, the sampling sites were mainly distributed in Haidian District and Fangshan District of Beijing, as shown in Fig. 2, Luquan District of Shijiazhuang City, Hebei Province, and Lubei District and Kaiping District of Tangshan City, as shown in Fig. 3. GPS was used to locate the latitude and longitude of sampling points, record the number of sampling points, geographic location, and type of construction waste, and use ArcGIS software to mark them on the map. Among them, the construction waste samples include engineering residue, engineering slurry, engineering waste, demolition waste and decoration waste, and the speci c sample numbers and sample types are shown in Table 1. Beijing mainly collected the waste generated in the process of demolition and renovation in a region, and the engineering waste generated by an environmental protection company. Shijiazhuang mainly collected demolition waste such as bricks, concrete and slag. Since Tangshan City...
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