Detection and recovery of palladium, gold and cobalt metals from the urban mine using novel sensors/adsorbents designated with nanoscale wagon- wheel-shaped pores

Sherif A. El-Safty, Mohamed A. Shenashen, Masaru Sakai, Emad Elshehy, Kohmei Halada

    Research output: Contribution to journalArticle

    12 Citations (Scopus)


    Developing low-cost, efficient processes for recovering and recycling palladium, gold and cobalt metals from urban mine remains a significant challenge in industrialized countries. Here, the development of optical mesosensors/adsorbents (MSAs) for efficient recognition and selective recovery of Pd(II), Au(III), and Co(II) from urban mine was achieved. A simple, general method for preparing MSAs based on using high-order mesoporous monolithic scaffolds was described. Hierarchical cubic /a3d wagon-wheel-shaped MSAs were fabricated by anchoring chelating agents (colorants) into three-dimensional pores and micrometric particle surfaces of the mesoporous monolithic scaffolds. Findings show, for the first time, evidence of controlled optical recognition of Pd(II), Au(III), and Co(II) ions and a highly selective system for recovery of Pd(II) ions (up to -95%) in ores and industrial wastes. Furthermore, the controlled assessment processes described herein involve evaluation of intrinsic properties (e.g., visual signal change, long-term stability, adsorption efficiency, extraordinary sensitivity, selectivity, and reusability); thus, expensive, sophisticated instruments are not required. Results show evidence that MSAs will attract worldwide attention as a promising technological means of recovering and recycling palladium, gold and cobalt metals.

    Original languageEnglish
    Article numbere53044
    JournalJournal of Visualized Experiments
    Issue number106
    Publication statusPublished - 2015 Dec 6



    • Detection
    • Engineering
    • Gold and cobalt metals
    • Issue 106
    • Nanoscale scaffolds
    • Palladium
    • Recovery
    • Sensor/adsorbent
    • Urban mine
    • Wagon-wheel-shaped

    ASJC Scopus subject areas

    • Biochemistry, Genetics and Molecular Biology(all)
    • Chemical Engineering(all)
    • Immunology and Microbiology(all)
    • Neuroscience(all)

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