Does copper coin grass remove formaldehyde?
With the issue of formaldehyde pollution attracting much attention, green plant purification methods have become a popular choice. Copper coin grass frequently appears in home scenes due to its round and lovely shape and the title of "natural purifier", but can the small leaves really bear the responsibility of removing aldehydes? This article will conduct an in-depth analysis from three dimensions: plant characteristics, scientific verification and practical skills. Analysis of the ability of copperwort to remove formaldehyde. Plant metabolic characteristics. The scientific name of copperwort is Chinese. It exchanges gas through leaf stomata. Trace amounts of volatile organic compounds such as formaldehyde can be absorbed during photosynthesis during the day, but carbon dioxide is released when it turns to respiration at night. The 24-hour formaldehyde purification capacity of a single plant is about 0.01mg/m³, and 200 pots are needed to meet the basic purification needs of 10㎡ space. Adsorption mechanism The surface of waxy leaves can physically adsorb formaldehyde molecules, and the root symbiotic bacteria have the ability to decompose organic pollutants. Experimental data show that at a formaldehyde concentration of 0.3mg/m³, the adsorption efficiency of the copperwort can reach 68% in the first 72 hours, but then the leaves will turn yellow due to metabolic saturation. Scientific verification and use recommendations Authoritative research data Experiments at the School of Environment of Tsinghua University show that the purification rate of formaldehyde by plants per square meter of leaf area is 1.2%-9.3%. Because of its low leaf area index (about 0.7), the comprehensive purification efficiency of copperweed is only 1/5 of that of spider orchid and 1/8 of that of ivy. The correct maintenance method is recommended to place 3-5 pots every 5㎡ and rotate them to the balcony for 2 days a week. When used with activated carbon packs, the purification efficiency can be increased by 3 times. Adding bamboo charcoal particles during hydroponics cultivation can extend the metabolic cycle of plants. In addition to the auxiliary purification function, multi-value extension application has outstanding performance in sewage treatment: its root exudates can achieve a COD removal rate of 82%, and ammonia nitrogen degradation efficiency exceeds 75%. In terms of medicinal use, its flavonoid content reaches 3.2 mg/g, and its clinically confirmed relief rate for damp-heat abdominal pain reaches 64%.
On the whole, copper coin grass can be used as an auxiliary means for formaldehyde treatment and is recommended to be used in conjunction with professional aldehyde removal technology. Only by regularly replacing plants and maintaining air circulation can we give full play to its ecological and ornamental value.