Fast Disinfection of Escherichia coli Bacteria Using Carbon Nanotubes Interaction with Microwave Radiation.

Bioinorganic chemistry and applications · 2013 · Mixed · Low evidence

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MixedLow evidencePaper 6546

Carbon nanotubes (CNTs) alone produced low E. coli removal (3–5%). When combined with microwave irradiation, unmodified CNTs removed up to 98% of bacteria and C18-functionalized CNTs achieved up to 100% removal under the same conditions.

Study snapshot

PublicationBioinorganic chemistry and applications · 2013

Study typein_vitro

Reported directionMixed

Evidence ratingLow

Abstract

Water disinfection has attracted the attention of scientists worldwide due to water scarcity. The most significant challenges are determining how to achieve proper disinfection without producing harmful byproducts obtained usually using conventional chemical disinfectants and developing new point-of-use methods for the removal and inactivation of waterborne pathogens. The removal of contaminants and reuse of the treated water would provide significant reductions in cost, time, liabilities, and labour to the industry and result in improved environmental stewardship. The present study demonstrates a new approach for the removal of Escherichia coli (E. coli) from water using as-produced and modified/functionalized carbon nanotubes (CNTs) with 1-octadecanol groups (C18) under the effect of microwave irradiation. Scanning/transmission electron microscopy, thermogravimetric analysis, and FTIR spectroscopy were used to characterise the morphological/structural and thermal properties of CNTs. The 1-octadecanol (C18) functional group was attached to the surface of CNTs via Fischer esterification. The produced CNTs were tested for their efficiency in destroying the pathogenic bacteria (E. coli) in water with and without the effect of microwave radiation. A low removal rate (3-5%) of (E. coli) bacteria was obtained when CNTs alone were used, indicating that CNTs did not cause bacterial cellular death. When combined with microwave radiation, the unmodified CNTs were able to remove up to 98% of bacteria from water, while a higher removal of bacteria (up to 100%) was achieved when CNTs-C18 was used under the same conditions.

Machine Enhanced Logic

AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typein_vitro

Effect directionmixed

PopulationNot supplied

Sample sizeNot supplied

Exposuremicrowave

Evidence strengthLowConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

E. coli removal/inactivation in water (disinfection efficiency)

Limitations

Microwave exposure parameters (e.g., frequency, power, duration) not reported in the abstract
No sample size or replication details provided in the abstract
In vitro/water treatment context; not directly informative for human health effects

View raw extracted JSON

{
  "study_type": "in_vitro",
  "exposure": {
    "band": "microwave",
    "source": null,
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "E. coli removal/inactivation in water (disinfection efficiency)"
  ],
  "main_findings": "Carbon nanotubes (CNTs) alone produced low E. coli removal (3–5%). When combined with microwave irradiation, unmodified CNTs removed up to 98% of bacteria and C18-functionalized CNTs achieved up to 100% removal under the same conditions.",
  "effect_direction": "mixed",
  "limitations": [
    "Microwave exposure parameters (e.g., frequency, power, duration) not reported in the abstract",
    "No sample size or replication details provided in the abstract",
    "In vitro/water treatment context; not directly informative for human health effects"
  ],
  "evidence_strength": "low",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "microwave irradiation",
    "carbon nanotubes",
    "functionalized CNTs",
    "1-octadecanol (C18)",
    "water disinfection",
    "Escherichia coli",
    "pathogen removal"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1155/2013/458943
PubMed: 23606820

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