Acacia nilotica (L.) Willd. ex Del.-Induced Tolerance Against Cadmium (Cd) Stress

Abstract

In the quest to mitigate heavy metal contamination, this study explores the phytoremediation potential of Acacia nilotica in soils laden with cadmium. The experiment involved germinating A. nilotica seeds and subjecting them to varying cadmium concentrations. After a growth period of three months, cadmium accumulation was assessed in different plant tissues using flame atomic absorption spectroscopy. The results indicated a proportional increase in cadmium uptake with rising exposure levels, with the roots exhibiting the highest accumulation at the higher concentration. This pattern underscores the roots' proficiency in cadmium sequestration and positions A. nilotica as a viable hyperaccumulator. The species' attributes, such as fast growth, an extensive root network, and drought resistance, enhance its phytoremediation capacity. The study recommends further field trials to determine optimal planting densities and harvest intervals, which could facilitate the large-scale application of this cost-effective and eco-friendly remediation method in developing countries.