Liu Zhengwei, Zhang Hai, Lin Xiaoyu, Zhang Hongzhe, Zhang Zhiyuan, Zhang Shucai
State Key Laboratory of Safety and Control for Chemicals, SINOPEC Research Institute of Safety Engineering Co. Ltd, Qingdao, China.
National Registration Center for Chemicals of the Ministry of Emergency Management of the People's Republic of China, Qingdao, China.
Front Chem. 2022 Sep 15;10:1008884. doi: 10.3389/fchem.2022.1008884. eCollection 2022.
Petrochemical excess sludge, as hazardous solid waste, poses a great threat to the environment and is difficult to dispose of in an economic and environmentally friendly way. A new alternative of using the petrochemical excess sludge to prepare ceramsite is proposed. The relationship between the sintering behavior of dried excess sludge, including the composition, temperature, fluxing agent, and pore-forming agent addition, and the properties of ceramsite is investigated. The properties of ceramsite are primarily affected by the sintering temperature and the addition of a fluxing agent. Ceramsite with a sintering-expanded surface is prepared. Also, its water absorption is quite low, indicating an improvement in densification due to sintering. Moreover, the leaching toxicity of the heavy metals in the dried excess sludge and prepared ceramsite is also investigated. It reveals the feasibility of ceramsite preparation by sintering petrochemical excess sludge.
石化剩余污泥作为危险固体废物，对环境构成巨大威胁，且难以以经济环保的方式进行处置。提出了一种利用石化剩余污泥制备陶粒的新方法。研究了干燥剩余污泥的烧结行为（包括成分、温度、助熔剂和造孔剂添加量）与陶粒性能之间的关系。陶粒性能主要受烧结温度和助熔剂添加量的影响。制备出了具有烧结膨胀表面的陶粒。此外，其吸水率相当低，表明烧结导致致密化程度提高。而且，还研究了干燥剩余污泥和制备的陶粒中重金属的浸出毒性。结果表明了通过烧结石化剩余污泥制备陶粒的可行性。
