关于危险财产HP14(生态毒性)的废物分类对于适当的废物管理至关重要。在欧盟,HP14是根据废物的化学成分而不是使用生物测试来估计的,和实验评估的指导方针仍然缺乏。这项研究旨在评估来自垃圾填埋场的风化粉煤灰(CFA)的潜在生态毒理学影响,作为案例研究,以评估当前欧盟用于对HP14进行废物分类的方法。大量的CFA仍被填埋,但它的价值化会引起人们的兴趣。分析基于CFA的化学成分(在ClasfyMyWaste软件中),在一系列五个应用于洗脱液的生物测试中,用Lepidiumsativum,费氏弧菌,头骨下,浮萍小调和大型水蚤。通过化学分析,大多数具有文献数据的模拟表明“可能的危险”,包括这项工作的样本。生物测定显示大多数终点的损害较低。麦格纳博士是最敏感的生物,但对洗脱液进行pH调节后,抑制作用显著降低。用A.fischeri进行的测试似乎不足以评估CFA,因为在结果中观察到的高度变异性。涉及一系列简单的生物测定的方法被证明具有启发性,为HP14评估提供相关结果。在这种情况下,所选择的一系列生物测试(不包括Fischeri测试)可能是代表水生环境的良好起点。总之,似乎风化的CFA可以被认为是无害的,因此,分析中的材料可以在实际应用中发挥作用,而不会对环境产生重大的生态毒性影响。
The classification of wastes regarding hazardous property HP 14 (ecotoxicity) is essential for proper waste management. In the EU, HP 14 has been estimated based on waste chemical composition rather than using biotests, and guidelines for experimental assessment are still lacking. This study aims at evaluating the potential ecotoxicological impacts of weathered coal fly ash (CFA) from a landfill, as a
case study to assess the current EU methodology used to classify wastes regarding HP 14. A large amount of CFA is still landfilled, but its valorisation would be of interest. The analysis was based on the chemical composition of CFA (in ClassifyMyWaste software), and on a battery of five biotests applied to eluates, with Lepidium sativum, Aliivibrio fischeri, Raphidocelis subcapitata, Lemna minor and Daphnia magna. Through chemical analysis, most of the simulations with data from the literature indicated \"Possible Hazard\", including the sample of this work. Biotests revealed low impairment for most endpoints. D. magna was the most sensitive organism, but the inhibitory effect was significantly reduced after pH adjustment of the eluate. The test with A. fischeri does not seem to be adequate to assess CFA due to the high variability observed in results. The methodology involving a simple battery of bioassays was proven to be enlightening, providing relevant results for HP 14 assessment. The chosen battery of biotests (excluding the A. fischeri test) may be a good starting point to represent the aquatic environment in this context. In short, it seems that weathered CFA can be considered non-hazardous, and therefore the material under analysis could be valorised in practical applications without significant ecotoxic effect on the environment.