Lin Huirong, Zhang Pengpeng, Zeng Linghao, Jiao Binquan, Shiau YanChyuan, Li Dongwei
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China.
College of Resource and Safety Engineering, Chongqing University, Chongqing 400044, China.
ACS Omega. 2021 Sep 9;6(37):23723-23730. doi: 10.1021/acsomega.1c01659. eCollection 2021 Sep 21.
Residues from the incineration of hazardous wastes are classified as hazardous byproducts because they contain heavy metals. Chromium-containing sludge (CCS) is industrial sludge produced during the electroplating process and includes heavy metals, such as Cr, Pb, and Cu. These heavy metals can infiltrate natural ecosystems and cause significant environmental damage. To limit the toxicity of leached products, hazardous waste incineration residues (HWIRs) can be repurposed as raw materials for producing glass-ceramics. In this study, we designed an orthogonal experiment to optimize the heat treatment process, yielding glass-ceramics with excellent properties and realizing heavy metal solidification. The toxic characteristic leaching procedure was used to determine the leaching toxicity of the cosintered solidified heavy metals, revealing that their solidification efficiencies exceed 90%. Moreover, X-ray diffraction analysis indicates that certain heavy metals participate in the formation of heavy-metal-containing crystal lattices (FeCrO and PbFeO), thereby reducing their leaching concentration. These results show that cosintering HWIR and CCS is an effective approach for heavy metal solidification and provides valuable insights into its utilization for producing building materials.
危险废物焚烧产生的残渣被归类为危险副产品，因为它们含有重金属。含铬污泥（CCS）是电镀过程中产生的工业污泥，包含重金属，如铬、铅和铜。这些重金属会渗入自然生态系统并造成严重的环境破坏。为了限制浸出产物的毒性，危险废物焚烧残渣（HWIRs）可被重新用作生产玻璃陶瓷的原材料。在本研究中，我们设计了一个正交实验来优化热处理过程，得到了性能优异的玻璃陶瓷并实现了重金属固化。采用毒性特性浸出程序来测定共烧结固化重金属的浸出毒性，结果表明它们的固化效率超过90%。此外，X射线衍射分析表明某些重金属参与了含重金属晶格（FeCrO和PbFeO）的形成，从而降低了它们的浸出浓度。这些结果表明，HWIR和CCS共烧结是重金属固化的有效方法，并为其用于生产建筑材料提供了有价值的见解。
