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Related Concept Videos

Microbial Bioremediation of Pesticides01:28

Microbial Bioremediation of Pesticides

Pesticides often feature structurally complex chemical architectures, incorporating halogen groups and multiple aromatic rings. These characteristics confer high chemical stability, rendering many pesticides resistant to natural degradation processes. This resistance poses significant environmental concerns, as persistent pesticide residues can accumulate in ecosystems and affect non-target organisms.Despite the inherent stability of many pesticides, certain microorganisms possess the metabolic...
Oxidative Cleavage of Alkenes: Ozonolysis01:46

Oxidative Cleavage of Alkenes: Ozonolysis

In ozonolysis, ozone is used to cleave a carbon–carbon double bond to form aldehydes and ketones, or carboxylic acids, depending on the work-up.
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
Microbial Bioremediation of Hydrocarbons01:26

Microbial Bioremediation of Hydrocarbons

Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
Electrophilic Aromatic Substitution: Sulfonation of Benzene01:22

Electrophilic Aromatic Substitution: Sulfonation of Benzene

Sulfonation of benzene is a reaction wherein benzene is treated with fuming sulfuric acid at room temperature to produce benzenesulfonic acid. Fuming sulfuric acid is a mixture of sulfur trioxide and concentrated sulfuric acid.
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
Bioremediation00:46

Bioremediation

Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.

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Related Experiment Video

Updated: May 21, 2026

Use of a Battery of Chemical and Ecotoxicological Methods for the Assessment of the Efficacy of Wastewater Treatment Processes to Remove Estrogenic Potency
09:49

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Published on: September 11, 2016

Endosulfan and lindane degradation using ozonation.

Asfiya Begum1, Sumit Kumar Gautam

  • 1The Energy and Resources Institute (TERI), 4th Main, II Cross, Domlur II Stage, Bangalore 560071, Karnataka, India.

Environmental Technology
|June 23, 2012
PubMed
Summary

Ozone effectively degrades the pesticides endosulfan and lindane. Optimal degradation was achieved using specific ozone dosages and pH levels, with identified degradation pathways.

Area of Science:

  • Environmental Chemistry
  • Oxidative Degradation
  • Pesticide Remediation

Background:

  • Endosulfan and lindane are persistent organic pollutants.
  • Ozone is a potent oxidizing agent with potential for pollutant degradation.
  • Understanding degradation mechanisms and kinetics is crucial for effective remediation.

Purpose of the Study:

  • To investigate the degradation of endosulfan and lindane using ozone.
  • To determine optimal conditions (ozone dosage, pH) for pesticide degradation.
  • To elucidate the degradation kinetics and pathways.

Main Methods:

  • Ozonation experiments were conducted with varying ozone dosages and pH.
  • Degradation efficiency was quantified using analytical techniques.

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  • Gas chromatography-mass spectrometry (GC-MS) was used to identify degradation products.
  • Reaction kinetics were analyzed using first-order models.

    • Main Results:

    • Optimal ozone dosage of 57 mg/min achieved 89% endosulfan and 43% lindane degradation.
    • Alkaline pH enhanced degradation; pH 10 yielded 93% endosulfan degradation, pH 12 yielded 82% lindane degradation.
    • First-order kinetics described the degradation process for both pesticides.
    • GC-MS analysis indicated ring fission mechanisms, with endosulfan degrading to methyl cyclohexane and o-xylene, and lindane to 1-hexene.

    Conclusions:

    • Ozone is an effective oxidant for degrading endosulfan and lindane.
    • Optimized pH conditions significantly enhance degradation efficiency.
    • The study provides insights into the kinetics and mechanisms of ozonation for pesticide removal.