Mg/Al layered double hydroxide for bacteriophage removal in aqueous solution

Area of Science:

• Environmental Science
• Materials Science
• Water Treatment

Background:

• Bacteriophages are common indicators of fecal contamination in water.
• Effective removal of bacteriophages is crucial for ensuring water safety.
• Layered double hydroxides (LDHs) are emerging materials with potential for contaminant removal.

Purpose of the Study:

• To investigate the efficacy of Mg/Al layered double hydroxide (LDH) for bacteriophage removal.
• To evaluate both powder and immobilized Mg/Al LDH for virus removal.
• To compare the performance of Mg/Al LDH with conventional sand filtration.

Main Methods:

• Batch experiments using powdered Mg/Al LDH and bacteriophage MS2.
• Column experiments with Mg/Al LDH immobilized on sand, using bacteriophages MS2 and phiX174.
• Quantification of bacteriophage removal using plaque assays.

Main Results:

• Powdered Mg/Al LDH demonstrated a removal capacity of 2.2 × 10(8) pfu/g for MS2.
• Mg/Al LDH-coated sand achieved a log removal of 4.40 for phiX174, compared to 0.05 for quartz sand.
• Over 4 log removal of MS2 (5.44) was achieved using 100% Mg/Al LDH-coated sand.

Conclusions:

• Mg/Al LDH is effective in removing bacteriophages from water.
• Mg/Al LDH-coated sand significantly enhances virus removal compared to sand alone.
• Mg/Al LDH shows promise as a material for water treatment and virus mitigation.