Progressive Approaches in Ni(II) Contaminated Water Treatment: A Review of Adsorbent Strategies

This review critically assesses the use of various adsorbents for the removal of Nickel (II) ions from contaminated water sources, with a focus on identifying sustainable, cost-effective solutions for wastewater treatment. The primary goal is to contribute to the development of efficient and affordable purification technologies by exploring innovative adsorbents and optimizing the conditions for their use. Significant findings from the review of over 140 papers highlight the potential of agricultural solid wastes, natural materials, and biosorbents, which demonstrate robust Ni(II) ion removal capacities and strong adsorption characteristics. These adsorbents are presented as promising alternatives to conventional methods, offering practical applications not only in wastewater treatment but also in broader environmental management. The study also outlines future research directions, emphasizing the need for comprehensive testing of these adsorbents under diverse operational conditions to ensure their scalability and applicability in real-world scenarios. The insights provided by this review aim to guide the advancement of sustainable water treatment practices, addressing the pressing global issue of water contamination.