Department of Chemistry and Chemical Technology, National University of Lesotho, P.O. Roma, 180, Lesotho.
Department of Chemistry, University of Botswana, Private Bag 0022, Gaborone, Botswana.
Environ Monit Assess. 2019 Feb 9;191(3):149. doi: 10.1007/s10661-019-7294-6.
Landfill leachate contains a myriad of hazardous chemicals; as such, they should always be planned and constructed following approved guidelines. A sample of soil collected from the old quarry designated as the official solid waste disposal site in Maseru, the capital city of Lesotho, was exposed to two extraction techniques, namely Soxhlet and reflux extractions, for characterisation of the potential endocrine-disrupting chemicals in the leachate. Principal component analysis was used to compare the extractability of these chemicals between the two methods, and it revealed that phthalates extract better in Soxhlet than in reflux extraction. Other compounds do not show as much difference. Qualitative analysis of the extracts revealed several compounds of environmental health interest, namely anthracene, bis-di-ethylhexyl-phthalates and di-tert-butylphenol. A review of the literature on some of the annotated compounds was explored for the likely sources thereof. It was discovered that most of the compounds that were identified have plastic origins and are listed as potential endocrine disruptors. The identified compounds were similar to those reported elsewhere in the literature.
垃圾渗滤液含有大量有害化学物质；因此，它们的规划和建设应始终遵循批准的指南。从被指定为莱索托首都马塞卢的官方固体废物处理场的旧采石场采集的土壤样本，采用索氏提取和回流提取两种提取技术，对渗滤液中的潜在内分泌干扰化学物质进行了特征描述。主成分分析用于比较这两种方法中这些化学物质的可提取性，结果表明酞酸酯在索氏提取中比在回流提取中更容易提取。其他化合物则没有那么大的区别。对提取物的定性分析揭示了几种环境健康相关的化合物，如蒽、双(二-乙基己基)邻苯二甲酸酯和二叔丁基对甲酚。对一些注释化合物的文献综述探讨了其可能的来源。发现大多数被鉴定的化合物都有塑料来源，被列为潜在的内分泌干扰物。所鉴定的化合物与文献中其他地方报道的相似。
