Dataset Information

Fast, Cost-effective and Energy Efficient Mercury Removal-Recycling Technology.

ABSTRACT: We herein present a novel and sustainable technology for mercury recycling, with the maximum observed uptake capacity. Facile synthesis of the most efficient (~1.9 gg-1) nano-trap, made of montmorillonite-Fe-iron oxides, was performed to instantaneously remove mercury(II) ions from water. Elemental Hg was recovered from the adduct, by employing Fe granules, at ambient conditions. Varied pHs and elevated temperatures further enhanced this already highly efficient recycling process. The reduction of Hg(II) to Hg(I) by the nano trap and Hg(I) to Hg(0) by Fe granules are the main driving forces behind the recycling process. Facile sustainable recycling of the nano-trap and Fe granules require no additional energy. We have further developed a recyclable model for Hg nano-trap, which is inexpensive (<$5 CAD), and can remove mercury in a few seconds. This technology has multiple applications, including in the communities exposed to mercury contamination.

SUBMITTER: Ganguly M

PROVIDER: S-EPMC6214898 | biostudies-other | 2018 Nov

REPOSITORIES: biostudies-other

ACCESS DATA

Publications

Fast, Cost-effective and Energy Efficient Mercury Removal-Recycling Technology.

Ganguly Mainak M Dib Simon S Ariya Parisa A PA

Scientific reports 20181102 1

We herein present a novel and sustainable technology for mercury recycling, with the maximum observed uptake capacity. Facile synthesis of the most efficient (~1.9 gg<sup>-1</sup>) nano-trap, made of montmorillonite-Fe-iron oxides, was performed to instantaneously remove mercury(II) ions from water. Elemental Hg was recovered from the adduct, by employing Fe granules, at ambient conditions. Varied pHs and elevated temperatures further enhanced this already highly efficient recycling process. The ...[more]

PMID: 30389950

Similar Datasets

Project description:The mycomembrane layer of the mycobacterial cell envelope is a barrier to environmental, immune, and antibiotic insults. There is considerable evidence of mycomembrane plasticity during infection and in response to host-mimicking stresses. Since mycobacteria are resource and energy limited under these conditions, it is likely that remodeling has distinct requirements from those of the well-characterized biosynthetic program that operates during unrestricted growth. Unexpectedly, we found that mycomembrane remodeling in nutrient-starved, nonreplicating mycobacteria includes synthesis in addition to turnover. Mycomembrane synthesis under these conditions occurs along the cell periphery, in contrast to the polar assembly of actively growing cells, and both liberates and relies on the nonmammalian disaccharide trehalose. In the absence of trehalose recycling, de novo trehalose synthesis fuels mycomembrane remodeling. However, mycobacteria experience ATP depletion, enhanced respiration, and redox stress, hallmarks of futile cycling and the collateral dysfunction elicited by some bactericidal antibiotics. Inefficient energy metabolism compromises the survival of trehalose recycling mutants in macrophages. Our data suggest that trehalose recycling alleviates the energetic burden of mycomembrane remodeling under stress. Cell envelope recycling pathways are emerging targets for sensitizing resource-limited bacterial pathogens to host and antibiotic pressure.IMPORTANCE The glucose-based disaccharide trehalose is a stress protectant and carbon source in many nonmammalian cells. Mycobacteria are relatively unique in that they use trehalose for an additional, extracytoplasmic purpose: to build their outer "myco" membrane. In these organisms, trehalose connects mycomembrane biosynthesis and turnover to central carbon metabolism. Key to this connection is the retrograde transporter LpqY-SugABC. Unexpectedly, we found that nongrowing mycobacteria synthesize mycomembrane under carbon limitation but do not require LpqY-SugABC. In the absence of trehalose recycling, compensatory anabolism allows mycomembrane biosynthesis to continue. However, this workaround comes at a cost, namely, ATP consumption, increased respiration, and oxidative stress. Strikingly, these phenotypes resemble those elicited by futile cycles and some bactericidal antibiotics. We demonstrate that inefficient energy metabolism attenuates trehalose recycling mutant Mycobacterium tuberculosis in macrophages. Energy-expensive macromolecule biosynthesis triggered in the absence of recycling may be a new paradigm for boosting host activity against bacterial pathogens.

Dataset Information

Fast, Cost-effective and Energy Efficient Mercury Removal-Recycling Technology.

Publications

Fast, Cost-effective and Energy Efficient Mercury Removal-Recycling Technology.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure