Today, one of the most important problems in the world is environmental and especially air pollution. Among the components of air pollution, especially heavy metals are of particular importance because they do not deteriorate and disappear easily in nature, can be toxic and carcinogenic to humans even at low concentrations, and bioaccumulate in living organisms. Therefore, it is extremely important to determine the heavy metal concentrations in the air. Barium (Ba), which has been largely neglected in studies on heavy metals, plays a key role in the production of many products in the industry. However, Ba is one of the most dangerous heavy metals and all barium compounds are toxic. This study was aimed to determine the accumulation of Ba concentration in some plants used extensively in Pakistan depending on traffic density. For this purpose, the variation of Ba concentrations in leaves and branches of Ficus bengalensis, Ziziphus mauritiana, Conocarpus erectus, and Azadrechta indica species depending on traffic density was determined. As a result of the study, it was determined that the most suitable species to be used for monitoring Ba concentration were Azadrechta indica leaves, and the most suitable organs were Azadrechta indica leaves.

今天，世界上最重要的问题之一是环境，尤其是空气污染。在空气污染的成分中，尤其是重金属尤为重要，因为它们在自然界中不易变质和消失，即使在低浓度下也可能对人体产生毒性和致癌性，并且在生物体内具有生物累积性。因此，测定空气中的重金属浓度极为重要。钡（Ba）在重金属研究中被广泛忽视，但在该行业的许多产品的生产中起着关键作用。然而，钡是最危险的重金属之一，所有钡化合物都是有毒的。本研究旨在根据交通密度确定在巴基斯坦广泛使用的一些植物中 Ba 浓度的积累。以此目的，确定了取决于交通密度的Ficus bengalensis、Ziziphus mauritiana、Conocarpus erectus和Azadrechta indica物种。研究结果确定，最适合用于监测 Ba 浓度的物种是印楝叶，最合适的器官是印楝叶。