• 한국환경과학회지
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• 제29권6호
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• pp.623-631
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• 2020

This study analyzes the effect of negative air ions on the concentration of airborne particulate matter and evaluates the expected purification efficiency of open spaces for particulate matter by investigating the amount of negative air ions generated by plants. This study establishes a negative air ion generation treatment environment, plant environment, and control environment to measure the purification efficiency of particulate matter under the conditions of each, analyzing the expected purification efficiency by designing a particulate matter purification model. Results show that the amount of generated negative air ion according to environment was negative air ion generation treatment environment > plant environment > control environment; this order also applies to the particulate matter purification efficiency. Moreover, it took 65 min for the negative ion generation treatment environment, 90 min for the plant environment, and 240 min for the control environment to reach the standard expected purification efficiency of particulate matter concentration of 960 mg/㎥ for PM₁₀. For PM_2.5, with the designated maximum concentration of 700 mg/㎥, it took 60 min for the negative ion generation treatment environment, 80 min for the plant environment, and more than 240 min for the control environment. Based on these results, the expected purification efficiency compared to the control environment was quadrupled in the negative ion generation treatment environment and tripled in the plant environment on average.

• 한국환경과학회지
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• 제16권2호
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• pp.197-202
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• 2007

Formaldehyde is a typical indoor air pollutant that has numerous adverse health problems in modern living conditions. Phytoremediation that use plants to remove contaminants from polluted media can be applied to improve indoor air quality. Two sets of experiments; 1) two rooms in newly built auditorium and 2) a bed room in 2-year-old apartment; were performed to investigate plant effects on indoor formaldehyde concentration. It was observed from the experiments that plant can help decontaminating formaldehyde at low concentration level (0.1 ppm) but the effects decreased considerably at hish concentration (1ppm). The purification effects of indoor plant also showed the periodic pattern due to its physiological activity. More purification was observed as increasing plant density in the bed room but the formaldehyde concentration returned the original concentration level in two days after removing plants. It was suggested from the results that air purification using plants is an effective means of reduction on indoor formaldehyde level, though, reduction of source is highly desirable when the concentration level is high. The results also suggest that introducing supplementary purifying aids and/or efficient ventilation could be considered due to periodic removal pattern of plant.

• 환경영향평가
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• 제14권4호
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• pp.147-155
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• 2005

This study was designed to investigate the effect of plant as a botanical air purification on the indoor pollution by formaldehyde. Three indoor plants such as Dracaena marhginata, Spathiphyllum and Dracaena reflexa, were placed in the artificially contaminated reactor under laboratory condition. Both plant and soil effects on removal of formaldehyde from contaminated indoor air were observed. Reductions in the formaldehyde levels appeared to have been associated with soil medium factors as well as plant factors. The effect of soil on formaldehyde reduction was high in the early stage of the experiment and the results suggest that sorption could be more important factor than microbial degradation in the initial dissipation of contaminants in the soil. It was suggested that the effect of plant on formaldehyde reduction might be related to the plant species, total leaf surface area of plant, degree of contribution of soil medium, and exposed concentration level. The results of this study showed that air purification using plants is an effective means of reduction on indoor formaldehyde level, though, utilization of soil media with high sorption capacity and/or supplementary purifying aids were also suggested when the source is continuous or exposed concentration level is high.

• 환경영향평가
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• 제15권6호
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• pp.417-423
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• 2006

The purification ability of indoor plants for volatile organic compounds was investigated. Philodendron selloum and Spathiphyllum sp. were tested for removal of toluene and trichloroethylene in the artificially contaminated reactor under laboratory conditions. Each plant was placed in right side of the reactor and the TCE and toluene concentration change with time were monitored. In the reactor with Philodendron, the TCE concentrations of left and right sides were compared to examine the removal effects by plant. In the reactor with Spathiphyllum, air was circulated before sampling, and thus average removal effects by plants on target VOC were observed. Both plants showed clear effects on removal of VOCs from contaminated indoor air. The removal efficiency of Philodendron and Spathiphyllum were similar and showed 30 - 46% and 31 - 47% of purification effects, respectively. The results of this study showed that air purification using plants is an effective means of reduction on indoor VOCs concentration level and reduce related health risk though, supplementary purifying aids or proper ventilation were also suggested.

• 융합신호처리학회논문지
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• 제19권4호
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• pp.167-173
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• 2018

빛이 부족하고 공기 순환이 원활하지 않은 실내에서 식물의 지상부와 지하부를 활용한 공기 정화 시스템을 제안한다. 제안된 시스템은 식물의 공기정화 효과를 극대화하고자 지상부는 청색과 녹색의 LED를 조합한 혼합광과 자연광에 가까운 고연색 LED를 각각 조사하고 지하부의 토양을 필터로 활용하고자 팬을 이용하여 강제 순환하였다. 광원과 팬이 결합된 실내공기정화 시스템이 식물만 배치된 경우보다 오염된 공기를 단시간에 가장 많이 제거하였다. 실내 공기정화 시스템의 혼합광과 고연색광 두 가지의 경우에서 식물만 배치된 경우보다 미세먼지는 각각 14%, 14.2%, TVOC는 7.5%, 9.4% 로 더 크게 감소하였다. 팬을 15분 동안만 가동한 실험에서도 TVOC가 97.8%로 크게 감소하였다. 식물의 광합성과 토양을 필터로 활용하는 것이 오염된 공기를 짧은 시간에 정화시킬 수 있었고 팬의 일시적인 가동으로도 지속적인 가동의 효과를 얻었다.

• 한국인터넷방송통신학회논문지
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• 제24권3호
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• pp.139-145
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• 2024

코로나19 이후로 사람들의 주 생활공간의 대부분이 실내로 옮겨졌다. 이러한 영향으로 많은 사람의 반려식물에 관한 관심이 지속적으로 상승하고 있다. 반려식물을 키우는 사람들은 정서적 안정 또는 공기 정화를 목적으로 키우게 되는 경우가 많다. 실제로 식물은 사람들에게 심리적인 안정감을 주는 효과가 있을 뿐만 아니라 어떤 식물이냐에 따라 실내 공기 정화 능력 또한 탁월하다. 하지만 식물에 대한 지식이 없다면 어떤 식물이 공기 정화 효과가 탁월한지 알 수 없고 키우더라도 금방 시들어 버리는 문제를 마주하게 된다. 따라서 본 논문에서는 사전 지식이 없는 사용자들에게 데이터베이스와 MBTI를 활용하여 사용자의 MBTI 정보 및 회원 정보를 데이터베이스에 저장하여 관리하고, 이를 바탕으로 사용자와 성향이 맞는 식물 데이터를 추천하고 캘린더를 통해 일정을 관리할 수 있는 기능을 제공하는 애플리케이션을 개발하고자 한다.

• 한국환경복원기술학회지
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• 제8권5호
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• pp.1-9
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• 2005

This study was conducted to investigate the effect of aquatic plant as a botanical air purification on the indoor air pollution by formaldehyde. Three aquatic plants such as Eichhornia crassipes, Cyperus alternifolius, Echinodorus cordifolius, were selected for this study and they were placed in the artificially contaminated chamber under laboratory condition. The results showed that all three plants could remove the formaldehyde from the contaminated air system effectively. Reduction in the formaldehyde levels by Eichhornia crassipes, which is the floating plant, might be associated with the factors of plant and water. Reduction in the formaldehyde levels by Cyperus helferi and Echinodorus cordifolius, which were emergent plant, was due to the complex effect of plant, soil medium and water. In aquatic plant system, dissolution, microbial degradation in rhizosphere, uptake through root and shoot, sorption to soil and shoot, hydrolysis are known as the main mechanisms of water soluble pollutants in the given system. The advantages of indoor air quality control system using aquatic plants can be; 1) various purifying mechanisms than foliage plants, 2) effective for decontamination of water soluble pollutants; 3) easy for maintenance; 4) diverse application potential. Therefore it was suggested from the results that indoor air control system of aquatic plants should be more effective for reduction of indoor air pollutants.

• 인간식물환경학회지
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• 제24권2호
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• pp.179-194
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• 2021

Background and objective: Plant-based biofilter system has become a promising candidate for improving indoor air quality due to its eco-friendly and sustainable nature. However, it remains controversial whether indoor air purification using a biofilter is effective. Methods: This study used the one-group pre- and post-test design to analyze the effects of the operation of the plant-based biofilter system on indoor air quality, students' perception of indoor air quality, health effects, and subjective and objective attentiveness. Results: Results of this study show that the application of the plant-based biofilter system changed the air environment in the classroom. The operation of the plant-based biofilter system significantly decreased PM_2.5 and PM₁₀ and slightly increased temperature and humidity. Satisfaction with air quality and subjective attentiveness were significantly improved but objective attentiveness and health effects were not improved. Conclusion: Further studies need to be conducted for improving indoor air quality of schools and evaluating the health effects and attention of occupants to present the objective performance of the plant-based biofilter system.

• 한국방사선학회논문지
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• 제14권7호
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• pp.881-889
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• 2020

본 연구는 건물의 저층과 고층에서 환기와 공기정화 식물을 통한 라돈의 농도 변화를 정량적으로 측정하고자 하였다. 건물의 저층과 고층에서 라돈 농도 측정을 위해 시간을 설정하고 라돈 측정기를 이용하여 실내를 폐쇄 했을 때와 환기, 공기정화식물을 배치했을 때의 라돈 농도를 각각 측정하여 비교하였다. 폐쇄, 환기, 공기정화식물 배치에 따라 라돈 농도 변화에 유의한 차이를 보이는지 검증하고자 일원배치 분산분석(One-way ANOVA)를 시행하였다. 실험 결과 건물의 저층과 고층에서 환기와 공기정화식물 배치를 통한 라돈 농도의 감소는 통계적으로 유의한 차이를 보였으며, 환기와 공기정화식물을 배치 했을 때에는 통계적으로 유의한 차이점을 나타내지 않았다. 따라서 건물내 환기 뿐만 아니라 공기정화식물을 적절히 활용하면 라돈 농도를 효과적으로 감소시킬 수 있을 것으로 사료된다.

• 한국수자원학회논문집
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• 제32권3호
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• pp.311-319
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• 1999

기존의 정수처리 공정인 응집 ·침전·모래여과를 단일 공정인 막분리 공정으로 대체하기 위한 중공사 정밀여과막의 적용 가능성을 검토하였다. 실험은 우선 실험실 규모의 실험에서 여러 가지 운전인자에 대한 수질의 안정성 및 장기 운전 가능성을 검토하였고, 여기에서 최적 운전인자로 얻어진 투과플럭스 0.03m/h, 10분 여과, 2분 정지 (30초간 air scrubbing 세정 포함)의 조건으로 20m3/일 규모의 Pilot Plant를 1년 이상 운전하여 안정성을 검증하는 방법으로 수행되었다. 탁도, SS등 막 투과수 수질은 전 실험 기간 동안 탁월한 제거효율을 나타내었다. 따라서 정수처리 공정에의 중공사 정밀여과막을 이용한 막분리 공정은 적용 가능하다고 판단된다.