Treatment of chloramphenicol-contaminated soil by microwave radiation.

Chemosphere · 2010 · Benefit · Insufficient evidence

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BenefitInsufficient evidencePaper 6484

Study snapshot

PublicationChemosphere · 2010

Study typeengineering

Reported directionBenefit

Evidence ratingInsufficient

Abstract

This paper describes the microwave (MW) treatment of soil contaminated by chloramphenicol (CAP), using granular activated carbon (GAC) as MW absorbent. It was found that the addition of GAC effectively increased the temperature of soil. Large MW power and GAC dosage were beneficial for a completed decomposition of CAP. The effect of initial CAP concentration on decomposition was minute and a small scale of soil/GAC was disadvantageous. The degradation mechanism by MW radiation was also explored. The decomposition product of 4-nitrobenzoic acid after MW radiation was confirmed by LC-MS. The analysis by GC-MS and FTIR proved that parts of the decomposed fragment of CAP reacted with soil organic matters and formed compounds with larger molecular weight than CAP, but the concentration of each product was extremely low. It was suggested that MW radiation was an alternative technology for the treatment of antibiotics-contaminated soils.

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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 typeengineering

Effect directionbenefit

PopulationNot supplied

Sample sizeNot supplied

Exposuremicrowave

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Microwave treatment of chloramphenicol-contaminated soil, using granular activated carbon as a microwave absorbent, increased soil temperature and supported more complete CAP decomposition with higher MW power and higher GAC dosage. Initial CAP concentration had little effect on decomposition; small soil/GAC scale was disadvantageous. LC-MS confirmed 4-nitrobenzoic acid as a decomposition product, and GC-MS/FTIR suggested some CAP fragments reacted with soil organic matter to form higher-molecular-weight compounds at extremely low concentrations.

Outcomes measured

Decomposition/degradation of chloramphenicol (CAP) in soil
Soil temperature increase with granular activated carbon (GAC) as MW absorbent
Identification of decomposition products (e.g., 4-nitrobenzoic acid)
Formation of higher-molecular-weight compounds from CAP fragments reacting with soil organic matter

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": "microwave",
    "source": "microwave radiation (MW) treatment",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Decomposition/degradation of chloramphenicol (CAP) in soil",
    "Soil temperature increase with granular activated carbon (GAC) as MW absorbent",
    "Identification of decomposition products (e.g., 4-nitrobenzoic acid)",
    "Formation of higher-molecular-weight compounds from CAP fragments reacting with soil organic matter"
  ],
  "main_findings": "Microwave treatment of chloramphenicol-contaminated soil, using granular activated carbon as a microwave absorbent, increased soil temperature and supported more complete CAP decomposition with higher MW power and higher GAC dosage. Initial CAP concentration had little effect on decomposition; small soil/GAC scale was disadvantageous. LC-MS confirmed 4-nitrobenzoic acid as a decomposition product, and GC-MS/FTIR suggested some CAP fragments reacted with soil organic matter to form higher-molecular-weight compounds at extremely low concentrations.",
  "effect_direction": "benefit",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "microwave radiation",
    "soil remediation",
    "chloramphenicol",
    "granular activated carbon",
    "antibiotics-contaminated soil",
    "LC-MS",
    "GC-MS",
    "FTIR"
  ],
  "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: 10.1016/j.chemosphere.2009.09.054
PubMed: 19846202

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