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Review on the Use of Heavy Metal Deposits from Water Treatment Waste towards Catalytic Chemical Syntheses
Summary
This review discussed approaches for recovering heavy metals from water treatment waste and reusing them as catalysts in chemical syntheses. The study examines various physico-chemical recovery pathways and structural aspects of metal-trapping systems, suggesting that converting toxic waste into useful catalysts could benefit both environmental protection and industrial chemistry.
The toxicity and persistence of heavy metals has become a serious problem for humans. These heavy metals accumulate mainly in wastewater from various industries' discharged effluents. The recent trends in research are now focused not only on the removal efficiency of toxic metal particles, but also on their effective reuse as catalysts. This review discusses the types of heavy metals obtained from wastewater and their recovery through commonly practiced physico-chemical pathways. In addition, it covers the advantages of the new system for capturing heavy metals from wastewater, as compared to older conventional technologies. The discussion also includes the various structural aspects of trapping systems and their hypothesized mechanistic approaches to immobilization and further rejuvenation of catalysts. Finally, it concludes with the challenges and future prospects of this research to help protect the ecosystem.