review · RSC Advances
Metal-organic frameworks, known as MOFs, offer a promising alternative to traditional adsorbents such as activated carbon and zeolites for capturing heavy metal pollutants from water. These porous materials feature high surface areas, tunable structures, and sustainable characteristics. Tailoring their performance depends heavily on the selection of metal nodes and organic ligands, alongside controlling physical parameters including pore dimensions, available surface area, and chemical functional groups. Recent innovations have focused on developing composite and hybrid MOF materials, which demonstrate superior adsorption capacities, improved recyclability, and reliable regeneration potential. Despite these advantages, key hurdles remain before wide deployment is feasible. Specifically, questions regarding process optimisation, the efficiency of regeneration cycles, and the reduction of production expenses must be addressed to make these materials viable for large-scale environmental and industrial water remediation programmes.
Heavy metal pollution in industrial effluents and natural water bodies presents serious environmental and public health hazards. Conventional adsorbents often suffer from limited efficiency or poor reusability. Advancing the design of metal-organic frameworks offers a route towards higher-capacity, regenerable water treatment materials, which could improve the sustainability and effectiveness of water decontamination efforts globally.
This technology targets water treatment operators and industrial facilities requiring heavy metal decontamination. The work represents early-stage materials development and synthesis review rather than an applied commercial product. Real-world adoption remains distant until developers resolve critical hurdles highlighted in the abstract, specifically process optimisation, the cost of manufacturing materials at scale, and the retention of adsorption efficiency across repeated regeneration cycles.
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The growing apprehension surrounding heavy metal pollution in both environmental and industrial contexts has spurred extensive research into adsorption materials aimed at efficient remediation. Among these materials, Metal-Organic Frameworks (MOFs) have risen as versatile and promising contenders due to their adjustable properties, expansive surface areas, and sustainable characteristics, compared to traditional options like activated carbon and zeolites. This exhaustive review delves into the synthesis techniques, structural diversity, and adsorption capabilities of MOFs for the effective removal of heavy metals. The article explores the evolution of MOF design and fabrication methods, highlighting pivotal parameters influencing their adsorption performance, such as pore size, surface area, and the presence of functional groups. In this perspective review, a thorough analysis of various MOFs is presented, emphasizing the crucial role of ligands and metal nodes in adapting MOF properties for heavy metal removal. Moreover, the review delves into recent advancements in MOF-based composites and hybrid materials, shedding light on their heightened adsorption capacities, recyclability, and potential for regeneration. Challenges for optimization, regeneration efficiency and minimizing costs for large-scale applications are discussed.
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DOI: 10.1039/d3ra08815d
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