Smart City Research Institute, College of Civil Engineering, Shenzhen University, 518060 Shenzhen, China.
Smart City Research Institute, College of Civil Engineering, Shenzhen University, 518060 Shenzhen, China.
Sci Total Environ. 2016 Dec 1;572:77-85. doi: 10.1016/j.scitotenv.2016.07.165. Epub 2016 Aug 3.
The vast majority of construction material is inert and can be managed as nonhazardous. However, structures may have either been built with some environmentally unfriendly substances such as brominated flame retardants (BFRs), or have absorbed harmful elements such as heavy metals. This study focuses on end-of-life construction materials, i.e. construction and demolition (C&D) waste components. The aim was to characterize the concentration of extremely harmful substances, primarily BFRs, including hexabromocyclododecane (HBCD) and polybrominateddiphenyl ethers (PBDEs). Results revealed extremely high contents of HBCD and PBDEs in typical C&D waste components, particularly polyurethane foam materials. Policies should therefore be developed for the proper management of C&D waste, with priority for POP-containing debris. The first priority is to develop a classification system and procedures to separate out the harmful materials for more extensive processing. Additionally, identification and quantification of the environmental implications associated with dumping-dominated disposal of these wastes are required. Finally, more sustainable materials should be selected for use in the construction industry.
绝大多数建筑材料是惰性的，可以作为无害物质进行管理。然而，建筑物可能使用了一些对环境不友好的物质，如溴化阻燃剂（BFRs），或者吸收了有害元素，如重金属。本研究关注的是建筑寿命结束后的材料，即建筑和拆除（C&D）废物成分。目的是描述浓度极高的有害物质，主要是 BFRs，包括六溴环十二烷（HBCD）和多溴联苯醚（PBDEs）。结果表明，在典型的 C&D 废物成分中，特别是在聚氨酯泡沫材料中，HBCD 和 PBDEs 的含量极高。因此，应制定适当管理 C&D 废物的政策，将含有持久性有机污染物的碎片作为优先事项。首要任务是开发分类系统和程序，将有害材料分离出来进行更广泛的处理。此外，还需要确定和量化与这些废物以倾倒为主的处置相关的环境影响。最后，应选择更可持续的材料用于建筑行业。
