Formaldehyde Odor on the Floor of Container Houses

The appearance of formaldehyde odor on the floor of container houses mainly stems from the release of decoration materials such as panels and adhesives, requiring comprehensive treatment through source control, ventilation, and decomposition by professional products.

1. Sources and Characteristics of Formaldehyde

Formaldehyde primarily comes from artificial panels (such as particleboard and medium-density fiberboard), wallpaper adhesives, carpet backings, and furniture containing adhesives, with a release period lasting from 3 to 15 years. It is colorless but has a pungent odor. At low concentrations, it may be difficult to detect, but long-term exposure can irritate the respiratory tract, trigger allergies, and even cause cancer. Container houses using inferior adhesives or panels have a higher risk of formaldehyde release.

2. Targeted Treatment Methods

1. Source Control

   • Prioritize the use of eco-friendly materials (such as ENF-grade panels and water-based adhesives) to reduce formaldehyde emission sources.
   • Avoid excessive decoration, especially in areas where people stay for long periods, such as bedrooms, to reduce the use of artificial panels.

2. Enhanced Ventilation

   • Keep doors and windows open to create air convection and accelerate formaldehyde volatilization. In hot seasons, electric fans can be used to enhance the effect.
   • Closed spaces (such as wardrobes and drawers) need to be ventilated separately, with cabinet doors opened regularly to release accumulated gases.

3. Professional Decomposition Products

   • Activated Manganese Decomposition Sheets: Utilize catalytic oxidation technology to decompose formaldehyde into water and carbon dioxide without secondary pollution. Suitable for closed areas such as wardrobes and under beds, place 1-2 packs per layer or cabinet.
   • Amino Composite Decomposition Enzyme Spray: Directly reacts with formaldehyde molecules to form a protective film for continuous decomposition. Spray on the surfaces of textiles such as curtains and sofas for 24-hour continuous operation.
   • Photocatalyst Spray: Decomposes formaldehyde under ultraviolet light, suitable for surface treatment of walls and furniture, requiring sufficient indoor light.

4. Auxiliary Measures

   • Activated Carbon Adsorption: Choose coconut shell activated carbon, place 1 kilogram per 10 square meters, expose it to the sun for 6 hours every month to restore adsorption capacity, and replace it every 3 months.
   • Green Plant Purification: Plants such as Monstera and Pothos can assist in absorbing formaldehyde, but their efficiency is low and needs to be combined with other methods.
   • Salt Water Wiping: Wipe walls and floors with diluted salt water to accelerate formaldehyde dissolution, but the salt water needs to be replaced regularly.

3. Long-term Monitoring and Prevention

• Conduct professional formaldehyde testing before moving in to ensure the concentration is ≤0.08mg/m³.
• Sensitive populations (such as pregnant women and children) should extend the ventilation time to more than 6 months.
• Regularly replace the filters of air purifiers and choose products with a CADR value of ≥300.
• Avoid using "folk methods" such as onion and vinegar fumigation, which can only mask odors and cannot decompose formaldehyde.