Cutting frequency effect on barium phytoextraction by macrophytes in flooded environment: A field trial

Area of Science:

• Environmental Science
• Ecotoxicology
• Bioremediation

Background:

• Barium sulfate in petroleum drilling fluids poses ecological risks under anoxic conditions.
• Accidental barium contamination necessitates effective remediation strategies.

Purpose of the Study:

• To evaluate the impact of plant cutting frequency on phytoremediation of barium-contaminated soil.
• To assess barium uptake by Typha domingensis and Eleocharis acutangula.

Main Methods:

• Field study in Brazil with combined Typha domingensis and Eleocharis acutangula plantation.
• Four cutting frequencies tested: 90, 120, 180, and 360 days.
• Barium levels analyzed in soil at different depths and in plant biomass.

Main Results:

• Barium in soil significantly decreased with 120 and 180-day cutting intervals (0-0.2m depth).
• Barium reduction was also observed at 0.2-0.4m depth with 120 and 360-day intervals.
• Highest barium accumulation in plant biomass occurred with 120 and 360-day cutting frequencies.

Conclusions:

• Cutting intervals of 120 days or longer enhance barium removal from soil.
• Longer cutting intervals promote greater barium accumulation in plant tissues, indicating effective phytoremediation.