Pawełczyk Adam, Božek František, Grabas Kazimierz, Chęcmanowski Jacek
Wroclaw University of Technology, Faculty of Chemistry, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland.
University of Defense, Kounicova 65, 662 10 Brno, Czech Republic.
Waste Manag. 2017 Mar;61:377-385. doi: 10.1016/j.wasman.2016.11.041. Epub 2016 Dec 12.
This work presents research on the neutralization of asbestos banned from military use and its conversion to usable products. The studies showed that asbestos can be decomposed by the use of phosphoric acid. The process proved very effective when the phosphoric acid concentration was 30%, the temperature was 90°C and the reaction time 60min. Contrary to the common asbestos treatment method that consists of landfilling, the proposed process ensures elimination of the harmful properties of this waste material and its transformation into inert substances. The obtained products include calcium phosphate, magnesium phosphate and silica. Chemical, microscopic and X-ray analyses proved that the products are free of harmful fibers and can be, in particular, utilized for fertilizers production. The obtained results may contribute to development of an asbestos utilization technique that fits well into the European waste policy, regulated by the EU waste management law.
这项工作展示了关于军事禁用石棉的中和及其转化为可用产品的研究。研究表明，使用磷酸可使石棉分解。当磷酸浓度为30%、温度为90°C且反应时间为60分钟时，该过程证明非常有效。与常见的填埋石棉处理方法不同，所提出的过程确保消除这种废料的有害特性并将其转化为惰性物质。所得产品包括磷酸钙、磷酸镁和二氧化硅。化学、显微镜和X射线分析证明，这些产品不含有害纤维，尤其可用于生产肥料。所获得的结果可能有助于开发一种符合欧盟废物管理法律所规定的欧洲废物政策的石棉利用技术。
