NDLI: Self-propelled chelation platforms for efficient removal of toxic metals

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Environmental Science: Nano Vol - 3 Issue - 2

Environmental Science: Nano Vol - 3 Issue - 1

Environmental Science: Nano Vol -2

Environmental Science: Nano Vol -1

Self-propelled chelation platforms for efficient removal of toxic metals

Content Provider	Royal Society of Chemistry (RSC)
Author	Uygun, M. Uygun, D. A. Jurado-Sánchez, B. Wang, J.
Copyright Year	2016
Abstract	Water-powered ligand-modified micromotors that offer efficient ‘on-the-fly’ chelation of heavy metal contaminants are described. The Janus micromotors are prepared by functionalizing Mg/Au microsphere motors with a self-assembled monolayer of meso-2,3-dimercaptosuccinic acid (DMSA). The resulting micromotors propel autonomously in complex environmental and biological matrices, containing chloride and surfactant, obviating the need for external (peroxide) fuel or expensive Pt catalysts. Such self-propelled micromotors act as highly efficient dynamic chelation platforms that offer significantly shorter and more efficient water remediation processes compared to the common use of static remediation agents. The effective decontamination capability of the DMSA-based Janus micromotors is illustrated towards the rapid removal of Zn(II), Cd(II) and Pb(II). Factors influencing the micromachine-enhanced metal chelation process, such as the navigation time and number of motors, have been investigated. High removal efficiencies of ∼100% are obtained for all target metals following 2 min treatment of serum, seawater or lakewater samples spiked with 500 μg L−1 of each heavy metal. The chelation mechanism has been characterized using the Langmuir model, indicating strong interaction and monolayer-type adsorption of the target heavy metals onto the DMSA-binding layer. The new nanomotor concept holds considerable promise towards future metal remediation applications.
Starting Page	559
Ending Page	566
Page Count	8
File Format	HTM / HTML PDF
ISSN	20518153
Volume Number	3
Issue Number	3
Journal	Environmental Science: Nano
DOI	10.1039/c6en00043f
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Langmuir Heavy metals Janus Microparticle Self-assembled monolayer Acid Dimercaptosuccinic acid Propel mometasone furoate implant Chloride Surfactant Hydrogen peroxide Lead Langmuir adsorption model Strong interaction Adsorption Nanomotor
Content Type	Text
Resource Type	Article
Subject	Environmental Science Materials Science

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