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  • Bacterially assembled biopolyester nanobeads for removing cadmium from water

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    Wibowo442254-Published.pdf (4.350Mb)
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    Version of Record (VoR)
    Author(s)
    Marques, Catarina R
    Wibowo, David
    Rubio-Reyes, Patricia
    Serafim, Luísa S
    Soares, Amadeu MVM
    Rehm, Bernd HA
    Griffith University Author(s)
    Wibowo, David
    Rehm, Bernd
    Year published
    2020
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    Abstract
    Cadmium (Cd)-contaminated waterbodies are a worldwide concern for the environment, impacting human health. To address the need for efficient, sustainable and cost-effective remediation measures, we developed innovative Cd bioremediation agents by engineering Escherichia coli to assemble poly(3-hydroxybutyric acid) (PHB) beads densely coated with Cd-binding peptides. This was accomplished by translational fusion of Cd-binding peptides to the N- or C-terminus of a PHB synthase that catalyzes PHB synthesis and mediates assembly of Cd2 or Cd1 coated PHB beads, respectively. Cd1 beads showed greater Cd adsorption with 441 nmol ...
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    Cadmium (Cd)-contaminated waterbodies are a worldwide concern for the environment, impacting human health. To address the need for efficient, sustainable and cost-effective remediation measures, we developed innovative Cd bioremediation agents by engineering Escherichia coli to assemble poly(3-hydroxybutyric acid) (PHB) beads densely coated with Cd-binding peptides. This was accomplished by translational fusion of Cd-binding peptides to the N- or C-terminus of a PHB synthase that catalyzes PHB synthesis and mediates assembly of Cd2 or Cd1 coated PHB beads, respectively. Cd1 beads showed greater Cd adsorption with 441 nmol Cd mg−1 bead mass when compared to Cd2 beads (334 nmol Cd mg−1 bead-mass) and plain beads (238 nmol Cd mg−1 bead-mass). The Cd beads were not ecotoxic and did attenuate Cd-spiked solutions toxicity. Overall, the bioengineered beads provide a means to remediate Cd-contaminated sites, can be cost-effectively produced at large scale, and offer a biodegradable and safe alternative to synthetic ecotoxic treatments.
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    Journal Title
    Water Research
    DOI
    https://doi.org/10.1016/j.watres.2020.116357
    Copyright Statement
    © 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, providing that the work is properly cited.
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    This publication has been entered in Griffith Research Online as an advanced online version.
    Subject
    Environmental Science and Management
    Publication URI
    http://hdl.handle.net/10072/397463
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