Department of Environmental Engineering, College of Biology and the Environment, Nanjing Forestry University, Nanjing, 210037, China.
State Key Lab of High Power Semiconductor Laser of Changchun University Science and Technology, Changchun University Science and Technology, Changchun, 130022, China.
Environ Sci Pollut Res Int. 2019 Jun;26(18):18541-18553. doi: 10.1007/s11356-019-05020-5. Epub 2019 May 3.
Mechanochemical degradation (MCD) technology has shown its remarkable potential in the disposal of persistent organochlorines in a non-combustion manner. In the present study, endosulfan, as the newly listed persistent organic pollutants (POPs) in the Stockholm Convention, was investigated for its feasibility of mechanochemical destruction using high-energy ball milling. Using calcium oxide (CaO) as a co-milling reagent, the degradation efficiency of endosulfan was nearly 100% after ball milling for 60 min, while the dechlorination efficiency and the sulfate formation efficiency were delayed for endosulfan degradation. After ball milling for 120 min, the dechlorination efficiency and sulfate formation efficiency reached 87.55% and 26.28%, respectively. Based on the measurement results from various material characterization approaches, the main degradation pathway of endosulfan was proposed as sequential dechlorination followed by the destruction of hydrocarbon skeleton. The GC-MS analysis confirmed that complete desulfurization and dechlorination had been realized finally. This study provides an option for the way toward the efficient and rapid destruction of endosulfan as a new POPs using mechanochemical technology.
机械化学降解（MCD）技术在非燃烧方式处理持久性有机氯方面显示出了显著的潜力。本研究以硫丹（一种新列入斯德哥尔摩公约的持久性有机污染物（POPs））为例，采用高能球磨法研究了其机械化学破坏的可行性。使用氧化钙（CaO）作为共磨试剂，球磨 60 分钟后，硫丹的降解效率接近 100%，而脱氯效率和硫酸盐生成效率则延迟了硫丹的降解。球磨 120 分钟后，脱氯效率和硫酸盐生成效率分别达到 87.55%和 26.28%。基于各种材料特性测试结果，提出了硫丹的主要降解途径为顺序脱氯，随后破坏碳氢骨架。GC-MS 分析证实最终实现了完全脱硫和脱氯。本研究为利用机械化学技术高效快速破坏新 POPs 硫丹提供了一种选择。
