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The Effectiveness of Bamboo Charcoal Packs in Removing Formaldehyde Odor
Release time:2021-11-12
Once the concentration and temperature are fixed, adsorption and desorption will reach equilibrium. When the external concentration decreases, this equilibrium is disrupted, and the previously adsorbed substance is released.
In other words, the formaldehyde adsorbed in bamboo charcoal is inherently unstable and can escape from the charcoal at any time.
Testers' experiment:
When the ambient temperature for formaldehyde adsorption by bamboo charcoal is raised to 35°C, its adsorption capacity at high temperatures is found to decrease. Each 100 grams of bamboo charcoal can adsorb 410 milligrams of formaldehyde.
From this perspective, under high-temperature summer conditions, the adsorption capacity of bamboo charcoal for formaldehyde decreases significantly, while the release rate of formaldehyde increases markedly.
According to Dr. Huang Shaodan of the Building Environment Testing Center at Tsinghua University, formaldehyde molecules exhibit high reactivity at elevated temperatures, making them prone to desorption from activated carbon adsorption sites; conversely, at lower temperatures, activated carbon demonstrates strong formaldehyde adsorption capacity, but this capacity diminishes as temperature rises.
From this perspective, bamboo charcoal should be kept away from excessively high-temperature environments to prevent a decline in its adsorption capacity.
For bamboo charcoal that has reached adsorption saturation, it can be exposed to direct sunlight or moved to a well-ventilated area and dried with a hair dryer. Reactivating the activated carbon at high temperature will restore its adsorption capacity.
Recommendation
How to Use a Dehumidifier Correctly
Proper use of a dehumidifier in humid environments can significantly improve air quality and living comfort. The primary function of a dehumidifier is to reduce indoor humidity, thereby preventing mold growth and other moisture-related problems. This article will explain how to use a dehumidifier correctly to ensure it operates at peak efficiency.
Principle of Odor Removal by Activated Carbon
Activated carbon deodorization primarily relies on the physical adsorption principle of activated carbon. In this process, air serves as the medium, and harmful substances in the air are adsorbed onto the surface of the activated carbon, which is why it is classified as a passive air-purification material. In contrast, oxidation methods mainly utilize ozone, a powerful oxidant. Ozone can chemically react with odor-causing compounds, oxidizing and breaking them down into non-toxic, odorless substances, thereby achieving deodorization. The range of odors that can be removed is extensive, encompassing smells primarily composed of ammonia, hydrogen sulfide, methyl mercaptan, dimethyl sulfide, and dimethyl disulfide.
A moisture-absorbing box is a product composed of calcium chloride and activated carbon granules. It can adsorb harmful substances such as formaldehyde and benzene, and delivers powerful dehumidification performance when used in living rooms, bedrooms, and other spaces. So, how should a moisture-absorbing box be used?
Moisture- and Mold-Proof Measures for Wardrobes
Ensure adequate ventilation. A major cause of mold growth in cabinets is a humid environment that cannot be promptly ventilated and dried. Therefore, it’s important to open cabinet doors regularly and keep indoor windows and doors well-ventilated to maintain a dry, fresh indoor atmosphere. This not only effectively prevents cabinets from becoming damp and moldy but also keeps moisture from penetrating the space. However, adjustments should be made flexibly according to the weather: during overcast, rainy, or humid conditions, minimize how often you open the cabinets and keep windows and doors tightly closed to prevent external moisture from entering, thereby protecting both the cabinets and their contents from dampness and mold.
The room and the wardrobe are both damp— a dehumidifier can help.
Dehumidification using a dehumidifier is the most widely used method of all, as it is suitable for all four seasons—spring, summer, autumn, and winter. Moreover, compared with central air-conditioning–based dehumidification, dehumidifiers consume far less energy, making them much more energy-efficient. In addition, dehumidifiers are compact and easy to move, allowing them to be conveniently placed in any location where dehumidification is needed, which makes them highly practical and user-friendly.
Why is calcium chloride the main component of dehumidifiers?
干燥的无水氯化钙（CaCl₂）具有潮解性，能从空气中吸收水分并溶于水。也就是说，这些白色固体在接触空气时会吸湿并转变为水溶液。因此，使用一段时间后，你会发现容器上部的白色固体已消失，而容器下部则会流出液体——实际上并非纯水，而是“氯化钙水溶液”。 名称：氯化钙（此处指无水氯化钙；其水合物包括二水氯化钙、六水氯化钙和四水氯化钙）。 俗称：干燥氯化钙。 外观：白色多孔块状、颗粒状或蜂窝状固体。味微苦，无臭。水溶液无色。强吸湿性，暴露于空气中极易潮解。易溶于水并放出大量热量，其水溶液呈弱碱性。
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