Raw and treated leachate samples were collected from different landfills in Greece and analyzed for several groups of emerging contaminants using high resolution mass spectrometric workflows to investigate the possible threat from their discharge to the aquatic environment. Fifty-eight compounds were detected; 2-OH-benzothiazole was found at 84 % of the samples and perfluorooctanoic acid at 68 %. Bisphenol A, valsartan and 2-OH-benzothiazole had the highest average concentrations in raw leachates, after biological treatment and after reverse osmosis, respectively. In untreated leachates, Risk Quotients > 1 were calculated for 35 and 18 compounds when maximum and average concentrations were used, indicating an ecological threat for the aquatic environment. Leachates' biological treatment partially removed COD and NH4+-N, as well as 52.3 % of total emerging contaminants. The application of reverse osmosis resulted in a 98 % removal of major pollutants, 99 % removal of total emerging contaminants and a significant decrease of ecotoxicity to Lemna minor. Beside the decrease of the detected micropollutants during treatment, RQs > 1 were still calculated for 13 and 3 compounds after biological treatment and reverse osmosis, respectively. Among these, special attention should be given to 2-OH-benzothiazole and bisphenol A that had RQ values much higher than 1 for all tested organisms.

中文翻译：

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填埋场渗滤液中新兴污染物的宽范围目标分析和使用风险商方法的风险评估。

从希腊的不同垃圾填埋场收集未经处理的渗滤液样品和经过处理的渗滤液样品，并使用高分辨率质谱工作流程分析了几组新兴污染物，以调查污染物排放到水生环境中的潜在威胁。共检测到58种化合物。发现84％的样品中有2-OH-苯并噻唑，而68％的样品是全氟辛酸。经过生物处理和反渗透后，双酚A，缬沙坦和2-OH-苯并噻唑的原始渗滤液平均浓度最高。在未处理的渗滤液中，当使用最大和平均浓度时，计算出35种和18种化合物的风险商> 1，表明对水生环境构成生态威胁。渗滤液的生物处理部分去除了COD和NH4 + -N以及52种。占总新兴污染物的3％。应用反渗透技术可去除98％的主要污染物，去除99％的总新兴污染物，并显着降低对Lemna minor的生态毒性。除了在处理过程中检测到的微量污染物减少之外，在生物处理和反渗透后，仍分别计算出13种和3种化合物的RQ> 1。其中，应特别注意所有测试生物的RQ值均远高于1的2-OH-苯并噻唑和双酚A。经过生物处理和反渗透后，仍分别计算出13种和3种化合物的1。其中，应特别注意所有测试生物的RQ值均远高于1的2-OH-苯并噻唑和双酚A。经过生物处理和反渗透后，仍分别计算出13种和3种化合物的1。其中，应特别注意所有测试生物的RQ值均远高于1的2-OH-苯并噻唑和双酚A。