Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, People's Republic of China.
Environ Sci Pollut Res Int. 2020 Jun;27(17):20904-20911. doi: 10.1007/s11356-020-08522-9. Epub 2020 Apr 5.
This work investigates the feasibility of co-mechanochemical treatment of oil-contaminated drill cuttings (OCDC), circulation fluidized bed combustion (CFBC) fly ash, and quicklime to prepare non-sintered lightweight aggregates (NSLWAs). The NSLWAs with high cylinder compressive strength and low water absorption could be obtained under the condition of optimal water addition and appropriate steam-curing temperature, as well as steam-curing time. Co-mechanochemical treatment could enhance the pozzolanic reactivity of CFBC fly ash effectively, which is beneficial to the strength development of NSLWAs. Moreover, co-mechanochemical treatment also can degrade the petroleum hydrocarbon of OCDC, greatly reducing the leaching concentrations of total petroleum hydrocarbons (TPH) of NSLWAs. The final leaching concentrations of TPH are much lower than the requirements of Chinese National Standard GB 31571-2015. Graphical abstract.
本工作研究了机械化学共处理油污染钻屑（OCDC）、循环流化床燃烧（CFBC）飞灰和生石灰来制备非烧结轻集料（NSLWAs）的可行性。在优化的加水量和适当的蒸汽养护温度以及蒸汽养护时间条件下，可以获得具有高圆柱抗压强度和低吸水率的 NSLWAs。机械化学共处理可以有效地提高 CFBC 飞灰的火山灰反应性，有利于 NSLWAs 的强度发展。此外，机械化学共处理还可以降解 OCDC 中的石油烃，大大降低 NSLWAs 中总石油烃（TPH）的浸出浓度。最终的 TPH 浸出浓度远低于中国国家标准 GB 31571-2015 的要求。图摘要。
