College of New Energy, China University of Petroleum (East Chian), Qingdao, China.
Yantai Wanhua Chemical Design Institute Co. Ltd, Yantai, China.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2021;56(7):797-803. doi: 10.1080/10934529.2021.1927598. Epub 2021 Jun 1.
In order to explore the effect of CaO on the ecological risk of chromium (Cr), copper (Cu) and zinc (Zn) in Oily sludge (OS), the incineration experiments of OS with and without calcium oxide (CaO) additive were carried out respectively in a horizontal tube furnace at the temperature ranging from 800 °C to 1000 °C. Furthermore, the ecological risk based on Risk Assessment Code (RAC) of Cr, Cu and Zn in OS, bottom ash from OS incineration (OSA) and bottom ash from OS incineration in the presence of CaO additive (OSA-CaO) were investigated in this work. The results showed that most of the Cr and Cu in OS remained in bottom ash, while Zn volatilized with the flue gas. At the same time, the RAC of Cr, Cu and Zn in OS decreased significantly after incineration. Compared with OSA, CaO obviously promoted the stabilization of Cr and Cu in OSA-CaO, but had little effect on the behavior of Zn. Moreover, CaO also reduced the RAC of Cu and Zn in samples, and reduced its harm to ecosystem. This study supplied essential data and theoretical support for the industrial treatment of OS, and was of great help to the harmless treatment of OS.
为了探究氧化钙（CaO）对油泥（OS）中铬（Cr）、铜（Cu）和锌（Zn）生态风险的影响，分别在水平管式炉中于 800-1000°C 温度范围内进行了添加和未添加 CaO 的 OS 焚烧实验。此外，还基于风险评估码（RAC）研究了 OS、OS 焚烧底灰（OSA）和添加 CaO 后 OS 焚烧底灰（OSA-CaO）中 Cr、Cu 和 Zn 的生态风险。结果表明，OS 中的大部分 Cr 和 Cu 残留在底灰中，而 Zn 则随烟道气挥发。同时，OS 焚烧后，Cr、Cu 和 Zn 的 RAC 显著降低。与 OSA 相比，CaO 明显促进了 OSA-CaO 中 Cr 和 Cu 的稳定，但对 Zn 的行为影响不大。此外，CaO 还降低了样品中 Cu 和 Zn 的 RAC，降低了它们对生态系统的危害。该研究为 OS 的工业处理提供了必要的数据和理论支持，对 OS 的无害化处理具有重要意义。
