Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.
College of Quality and Safety Engineering, Institution of Industrial Carbon Metrology, China Jiliang University, Hangzhou 310018, China.
Waste Manag. 2020 Mar 1;104:207-212. doi: 10.1016/j.wasman.2020.01.012. Epub 2020 Jan 23.
Chlorine is a common element in the environment where it mostly exists in an inorganic ionic state that is highly mobile and non-degradable. It is important to investigate the potential release of chlorine into the environment from mineralized waste (MW) for stable landfill reclamation. In this study, inorganic chlorine in the MW migration process was explored during thermal treatment for chlorine pollution control. The temperature and chlorine greatly affected the distribution of inorganic chlorine in the thermally treated products. Below 800 °C, more than 60% of the inorganic chlorine remained in the bottom slag. Above 900 °C, volatilization caused the release of chlorine from the MW and more than 75% of the inorganic chlorine was deposited inside the furnace. The mass of inorganic chlorine deposited in the thermal treatment furnace was significantly correlated with the actual temperature. At 1000 °C, the masses of inorganic chlorine deposited under pyrolysis, incineration, and gasification atmospheres were 7.69, 5.81, and 5.68 mg, respectively. The greatest deposition of inorganic chlorine inside the furnace occurred during pyrolysis. The chlorine migration process must gain more sight during MW thermal processing.
氯是环境中的一种常见元素，主要以高度可移动和不可降解的无机离子态存在。研究从矿化废物（MW）中向环境中潜在释放氯对于稳定的垃圾填埋场开垦非常重要。在本研究中，为了控制氯污染，探讨了 MW 热处理过程中无机氯的迁移过程。温度和氯极大地影响了热处理产物中无机氯的分布。在 800°C 以下，超过 60%的无机氯残留在底渣中。在 900°C 以上，挥发作用导致 MW 释放氯，超过 75%的无机氯沉积在炉内。在热处理炉中沉积的无机氯质量与实际温度显著相关。在 1000°C 下，在热解、焚烧和气化气氛下沉积的无机氯质量分别为 7.69、5.81 和 5.68mg。在热解过程中，炉内沉积的无机氯最多。MW 热加工过程中必须更深入地了解氯的迁移过程。
