为了填补关于阿曼苏丹国农药持久性有机污染物（POPs）的来源和命运的知识和数据空白，对新的和旧的有机氯农药（OCPs）进行了全面的空气和表面土壤监测。农田土壤样品中的DDTs浓度范围从0.013 to 95.80 ng/g（平均：8.4 ± 25.06 ng/g），中位数为0.07 ng/g。最高浓度出现在Shinas地区，该地区广泛采用密集农业生产方式。土壤和空气中p,p'-DDT的主导地位反映了阿曼国内的DDT技术配方使用。在新列入的POPs中，五氯苯的检出频率在空气中为47%，在土壤中为41%。超过90%的监测点显示已有大量使用六氯苯的痕迹。主要的OCP同分异构体和代谢产物在农田土壤中表现出净挥发现象，表明阿曼土壤同时存在排放和再排放过程。然而，洋流风的净化效果可能是较低大气OCP水平的可能原因，这是一项先前研究所得出的结论。尽管DDT具有最大的癌症风险，但其浓度低于允许的限值。DDT主要源自废弃存货和不合适的管理做法。因此，我们建议在阿曼需要对DDT进行管理与规范。版权所有 © 2023 Elsevier B.V.。保留所有权利。

Comprehensive air and surface soil monitoring was conducted for new and legacy organochlorine pesticides (OCPs) to fill the knowledge and data gap on the sources and fate of pesticidal persistent organic pollutants (POPs) in the Sultanate of Oman. DDTs in agricultural soil samples ranged from 0.013 to 95.80 ng/g (mean: 8.4 ± 25.06 ng/g), with a median value of 0.07 ng/g. The highest concentration was observed at Shinas, where intensive agricultural practice is prevalent. The dominance of p,p'-DDT in soil and air reflected technical DDT formulation usage in Oman. Among newly enlisted POPs, pentachlorobenzene had the maximum detection frequency in air (47%) and soil (41%). Over 90% of sites reflected extensive past use of hexachlorobenzene. Major OCP isomers and metabolites showed net volatilisation from the agricultural soil, thereby indicating concurrent emission and re-emission processes from the soil of Oman. However, the cleansing effect of oceanic air mass is the possible reason for relatively lower atmospheric OCP levels from a previous study. Although DDT displayed maximum cancer risk, the level is below the permissible limit. DDT primarily stemmed from obsolete stock and inadequate management practices. Hence, we suggest there is a need for DDT regulation in Oman.Copyright © 2023 Elsevier B.V. All rights reserved.