Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan.
High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, Taipei, Taiwan.
PLoS One. 2022 Aug 16;17(8):e0273188. doi: 10.1371/journal.pone.0273188. eCollection 2022.
Managing indoor ozone levels is important because ozone is a hazardous pollutant that has adverse effects on human health. Coffee is a popular daily beverage, and thus, coffee beans and spent coffee grounds are common in many places such as offices, homes, aircraft, cafeterias, and such. The most common material used to remove ozone is activated carbon which can be made from coffee beans or spent coffee grounds with proper activation processes. This paper presents a novel idea: to remove ozone at the level of an indoor environment using unactivated coffee products. This paper examines the ozone removal efficiency and the ozone deposition velocity at 130 ppb ozone for two types of coffee: solid coffee (powder) and liquid coffee (beverage). The activated carbon, the deionized water, and the seawater are also included for comparison and validation purposes. The tests show that the fine coffee powder has a removal efficiency of 58.5% and a deposition velocity of 0.62 cm/s. The liquid coffee has a removal efficiency of 34.4% and a deposition velocity of 0.23 cm/s. The chemical inspections indicate that the oxidation reactions with the carbohydrates in solid coffee and the metal/mineral elements in liquid coffee are responsible for ozone removal. These results have confirmed that ozone removal via coffee is effective, controlling indoor air quality by coffee products is thus becoming possible.
管理室内臭氧水平很重要，因为臭氧是一种有害污染物，对人体健康有不良影响。咖啡是一种受欢迎的日常饮料，因此，咖啡豆和用过的咖啡渣在许多地方都很常见，如办公室、家庭、飞机、自助餐厅等。去除臭氧最常用的材料是活性炭，可以由咖啡豆或经过适当活化处理的用过的咖啡渣制成。本文提出了一个新颖的想法：使用未活化的咖啡产品在室内环境中去除臭氧。本文研究了两种咖啡（固体咖啡（粉末）和液体咖啡（饮料））在 130ppb 臭氧下的臭氧去除效率和臭氧沉积速度。还包括活性炭、去离子水和海水进行比较和验证。测试表明，细咖啡粉的去除效率为 58.5%，沉积速度为 0.62cm/s。液体咖啡的去除效率为 34.4%，沉积速度为 0.23cm/s。化学检验表明，固体咖啡中的碳水化合物和液体咖啡中的金属/矿物质元素与臭氧发生氧化反应，从而实现臭氧去除。这些结果证实了通过咖啡去除臭氧是有效的，因此通过咖啡产品来控制室内空气质量成为可能。
