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Elements in Wastewater for Agricultural Use

Santarsiero1, Veschetti, Ottaviani

  • 1Istituto Superiore di Sanita, Viale Regina Elena 299, Rome, 00161, Italy

Microchemical Journal : Devoted to the Application of Microtechniques in All Branches of Science
|November 1, 1996
PubMed
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Wastewater irrigation requires monitoring elemental concentrations. Rainwater

Area of Science:

  • Environmental Chemistry
  • Water Quality Analysis
  • Agricultural Science

Background:

  • Increasing use of wastewater for agricultural irrigation necessitates understanding its elemental composition.
  • Temporal variations in elemental concentrations in treated and untreated sewage are critical for agricultural applications.
  • Assessing the impact of environmental factors, like rainwater, on wastewater quality is essential.

Purpose of the Study:

  • To determine concentrations of 13 elements (Al, Ca, Cd, Cr, Cu, Fe, K, Mg, Na, Ni, Pb, Zn) in treated and untreated sewage.
  • To estimate the sodium adsorption ratio index using Ca, Mg, and Na concentrations.
  • To investigate the influence of rainwater on elemental concentrations and wastewater treatment plant efficiency.

Main Methods:

Related Experiment Videos

  • Analysis of treated and untreated sewage samples using atomic absorption spectrophotometry (Perkin-Elmer Model 460 and 5000).
  • Determination of total residue and settleable solids volume.
  • Collection of rainwater data alongside elemental and physical parameter measurements.
  • Application of Principal Components Analysis (PCA) to understand interrelationships among 13 parameters.

    • Main Results:

    • Rainwater's effect on elemental concentrations is complex, not merely dilution.
    • Each element exhibited unique temporal behavior, indicating distinct evolutionary patterns.
    • No significant correlation was found between elemental concentrations in treated and untreated sewage samples.
    • Sodium adsorption ratio index was estimated using specific elemental concentrations.

    Conclusions:

    • Wastewater elemental composition is influenced by factors beyond simple dilution by rainwater.
    • Understanding the individual behavior of elements is crucial for safe agricultural reuse.
    • Treated and untreated sewage exhibit independent elemental profiles, impacting treatment and application strategies.
    • The study provides insights into wastewater quality management for sustainable agriculture.