Air-purifying plants are becoming increasingly popular as they offer functional interior design and purify indoor air. Recent studies suggest these plants can significantly improve the quality of indoor air and overall well-being. This enriches the indoor environment by reducing pollutants, increasing humidity, improving air quality, and bringing us closer to nature. In this article, we’ll delve deep into understanding the science, benefits, and types of air-purifying plants.
NASA’s Clean Air Study, published in 1989, extensively researched indoor plants’ ability to purify air. This study aimed to discover ways to clean the air in space stations. Although it was conducted in a controlled lab environment, its results are often extrapolated to indoor environments. The many houseplants assessed were Golden Pothos, English Ivy, and Peace Lily, all of which were found effective at reducing indoor pollutants like benzene, formaldehyde, trichloroethylene, xylene and ammonia.
The air-purifying process, known as phytoremediation, leverages plants and their associated microorganisms to stabilize or reduce contamination in air, water, and soil. This process involves the absorption of pollutants through leaf stomata and plant roots.
The concept of using houseplants to clean the air may also be traced back to the “Sick Building Syndrome” in the late twentieth century. This syndrome was identified as illnesses or discomforts triggered by spending time in particular buildings, primarily due to poor ventilation and chemicals from furniture, flooring, and office equipment.
Air-purifying plants offer a natural, attractive way to combat these pollutants. A wealth of health benefits accompanies their air-cleaning powers, such as stress relief and improved concentration. With these plants gracing the indoor atmosphere, spaces can transform into more productive, cleaner, and healthier environments.
Different types of air-purifying plants have unique cleansing abilities. For instance, the Snake Plant, known for its hardiness, excels at absorbing toxins like nitrogen oxides and formaldehyde, commonly found in personal care products, toilet paper, tissues, and cleaning agents used around the home. The Spider Plant, beginner-friendly, tackles carbon monoxide and xylene, a solvent used in printing industries. The Peace Lily, besides sweeping toxins, also increases room humidity by up to 5%, thereby reducing airborne microbes, which causes allergies.
Despite their benefits, it’s essential to acknowledge that these plants alone cannot entirely purify indoor air. The NASA study suggested having one plant per 100 square feet of floor space to successfully clean the air. However, later research showed that the plants would require a higher density – roughly 680 plants in a small 1,500 square foot house – which is evidently impractical.
Besides, individuals sensitive to mold and pollen might experience adverse reactions to indoor plants. Overwatering can lead to mold formation in the soil, and some plants can release spores into the air, triggering allergies. Hence, routine maintenance is necessary.
Current research propels forward, promising innovative solutions for improving indoor air quality using plants. One example is photocatalytic green wall technology developed by the University of Technology Sydney. Here, plants are grown in a hydroponic system embedded with a specialized photocatalytic substance that breaks down pollutants when exposed to LED lighting. This methodology indicates an even greater potential for plant-based air purification systems in design and technology.
Another effective approach to improving indoor air quality is integrating plants with HVAC systems. As plants absorb airborne pollutants, an HVAC system equipped with a high-efficiency particulate air (HEPA) filter can transport these particles to the plants, aiding in their absorption.
The trend of biophilic design, connecting people and nature within built environments, taps into the air-purifying abilities of plants to enhance the aesthetic appeal, sustainability, and wellness of interior spaces. From vertical green walls to tabletop terrariums, several possible design implementations can incorporate air-purifying plants in home and office spaces.
Air-purifying plants and the associated research shed light on nature’s extraordinary power to rejuvenate and restore. The interplay of plants, technology, and design is forging the way towards a healthier tomorrow. As we continue to explore these promising possibilities, it’s crucial to stay rooted in practical considerations. A balanced approach, combining the use of plants with excellent ventilation and reduction of pollutant sources, serves as the best strategy for cleaner, fresher indoor air.
