ahu aydogan - Academia.edu (original) (raw)

Papers by ahu aydogan

Research paper thumbnail of Review of the effects of plants on indoor environments

Indoor and Built Environment, 2020

Although well-established technologies can remove certain toxins from indoor environments, method... more Although well-established technologies can remove certain toxins from indoor environments, methods capable of eliminating all of them do not yet exist. Biological methods, however, which are based on plants and their associated microorganisms, could hold significant promise. To achieve high toxic remediation, utilization of the soil microorganisms in the root zone of the plant is vital. Moreover, evidence suggests that in addition to cleaning the air, plants in indoor environments offer psychological, physiological and cognitive benefits. This paper provides an overview of the effects of plants on indoor air quality on the broader benefits of incorporating vegetation into indoor environments.

Research paper thumbnail of Building-integrated active modular phytoremediation system

Research paper thumbnail of The Durability of Plant-Based Air Filtering Systems in Buildings: From an Air Quality and Energy Reduction Perspective

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings, 2020

After the oil crisis, all the commercial and residential buildings were designed with tightly sea... more After the oil crisis, all the commercial and residential buildings were designed with tightly sealed envelopes to minimize the air leakage through the building to save energy. Since buildings were no longer able to breathe naturally, indoor air quality problems started to occur. Currently, there is still a dilemma between these two parameters inside the buildings. To address IAQ issues and reduce the energy loads in mechanical conditioning systems, the plant-based air filtering system is designed. The proposed system is a hydroponic system (plants growing without soil) that is composed of a mixed bed of activated carbon adsorbents and porous glass stones that capture and filter the toxins in the air. HVA walls that include growth media are designed to support the plants and capturing toxins. These toxins are outdoor air being fed into the building, thereby reducing the conditioning costs associated with HVAC. This paper is focused on the durability of the design and fabrication of a plant-based air filtering system from an air quality and energy reduction perspective.

Research paper thumbnail of Golden Pothos viability in engineered mixed bed growth media containing ionic liquids for plant-based building air filtration systems

Rhizosphere, 2020

Abstract The viability of the Golden Pothos (Epipremnum aureum) plants in different formulations ... more Abstract The viability of the Golden Pothos (Epipremnum aureum) plants in different formulations of engineered growth media were evaluated for application in plant-based air filtration systems. To enhance filtration capability, the growth media was engineered to improve toxin capture ability with the aim of maintaining a plant-friendly environment. The growth media used in this study was a hydroponic media composed of activated carbon and porous glass (Growstone). Wet granulation was performed to create a mixed bed of the growth media composed of 40% activated carbon and 60% Growstone. Ionic liquids were tethered to the activated carbon to enhance the toxin capacity and selectivity and then granulated with Growstone to form the enhanced growth media. Two ionic liquids were utilized in this study: 1-butylpyridinium bis(trifluoromethylsulfonyl)imide and choline bis(trifluoromethylsulfonyl)imide, and were selected for their air toxin absorption capacity and reported low toxicity. Eighteen Golden Pothos plants were transplanted to hydroponic and monitored over a period of 40 days in the engineered growth media. Plant metrics were qualitatively and quantitatively analyzed. No statistical difference in normalized growth by % weight gain between the ionic-liquid containing media and the ionic liquid-free growth media was found, however, a statistical difference was observed between the 1-butylpyridinium bis(trifluoromethylsulfonyl)imide and the choline bis(trifluoromethylsulfonyl)imide containing growth medias. The results of this study illustrate that any ionic liquids identified as good candidates based upon their air filtration ability and basic toxicity studies need to be evaluated first for plant viability before studying the efficacy of the full plant-based air filtration system for toxin removal.

Research paper thumbnail of Formaldehyde removal by common indoor plant species and various growing media

Atmospheric Environment, 2011

Three porous materials (growstone, expanded clay and activated carbon) were evaluated as hydropon... more Three porous materials (growstone, expanded clay and activated carbon) were evaluated as hydroponic growing media and for their individual ability to remove the indoor volatile organic compound formaldehyde under three conditions: growing medium alone, dry medium in a pot, and wet medium in a pot. The total percent-reduction of formaldehyde by each growing media was evaluated over a 10-h period. In all cases, activated carbon achieved the highest removal under the three conditions studied with average percent reductions measured at about 98%. Four common interior plants: Hedera helix (English ivy), Chrysanthemum morifolium (pot mum), Dieffenbachia compacta (dump cane) and Epipremnum aureum (golden pathos) growing in growstone were then tested for their ability to remove formaldehyde. The removal capacity of the aerial plant parts (AP), the root zone (RZ) and the entire plant (EP) growing in growstone were determined by exposing the relevant parts to gaseous formaldehyde (w2000 mg m À3 ) in a closed chamber over a 24-h period. The removal efficiency between species and plant parts were compared by determining the time interval required to decrease about 2/3 of the total formaldehyde concentration reduction, T 2/3 . The T 2/3 measured were 23, 30, 34 and 56 min for EP of C. morifolium, E. aureum, D. compacta and H. helix, respectively. The formaldehyde removal by the root zone was found to be more rapid than the removal by the aerial plant parts.

Research paper thumbnail of Review of the effects of plants on indoor environments

Indoor and Built Environment, 2020

Although well-established technologies can remove certain toxins from indoor environments, method... more Although well-established technologies can remove certain toxins from indoor environments, methods capable of eliminating all of them do not yet exist. Biological methods, however, which are based on plants and their associated microorganisms, could hold significant promise. To achieve high toxic remediation, utilization of the soil microorganisms in the root zone of the plant is vital. Moreover, evidence suggests that in addition to cleaning the air, plants in indoor environments offer psychological, physiological and cognitive benefits. This paper provides an overview of the effects of plants on indoor air quality on the broader benefits of incorporating vegetation into indoor environments.

Research paper thumbnail of Building-integrated active modular phytoremediation system

Research paper thumbnail of The Durability of Plant-Based Air Filtering Systems in Buildings: From an Air Quality and Energy Reduction Perspective

XV International Conference on Durability of Building Materials and Components. eBook of Proceedings, 2020

After the oil crisis, all the commercial and residential buildings were designed with tightly sea... more After the oil crisis, all the commercial and residential buildings were designed with tightly sealed envelopes to minimize the air leakage through the building to save energy. Since buildings were no longer able to breathe naturally, indoor air quality problems started to occur. Currently, there is still a dilemma between these two parameters inside the buildings. To address IAQ issues and reduce the energy loads in mechanical conditioning systems, the plant-based air filtering system is designed. The proposed system is a hydroponic system (plants growing without soil) that is composed of a mixed bed of activated carbon adsorbents and porous glass stones that capture and filter the toxins in the air. HVA walls that include growth media are designed to support the plants and capturing toxins. These toxins are outdoor air being fed into the building, thereby reducing the conditioning costs associated with HVAC. This paper is focused on the durability of the design and fabrication of a plant-based air filtering system from an air quality and energy reduction perspective.

Research paper thumbnail of Golden Pothos viability in engineered mixed bed growth media containing ionic liquids for plant-based building air filtration systems

Rhizosphere, 2020

Abstract The viability of the Golden Pothos (Epipremnum aureum) plants in different formulations ... more Abstract The viability of the Golden Pothos (Epipremnum aureum) plants in different formulations of engineered growth media were evaluated for application in plant-based air filtration systems. To enhance filtration capability, the growth media was engineered to improve toxin capture ability with the aim of maintaining a plant-friendly environment. The growth media used in this study was a hydroponic media composed of activated carbon and porous glass (Growstone). Wet granulation was performed to create a mixed bed of the growth media composed of 40% activated carbon and 60% Growstone. Ionic liquids were tethered to the activated carbon to enhance the toxin capacity and selectivity and then granulated with Growstone to form the enhanced growth media. Two ionic liquids were utilized in this study: 1-butylpyridinium bis(trifluoromethylsulfonyl)imide and choline bis(trifluoromethylsulfonyl)imide, and were selected for their air toxin absorption capacity and reported low toxicity. Eighteen Golden Pothos plants were transplanted to hydroponic and monitored over a period of 40 days in the engineered growth media. Plant metrics were qualitatively and quantitatively analyzed. No statistical difference in normalized growth by % weight gain between the ionic-liquid containing media and the ionic liquid-free growth media was found, however, a statistical difference was observed between the 1-butylpyridinium bis(trifluoromethylsulfonyl)imide and the choline bis(trifluoromethylsulfonyl)imide containing growth medias. The results of this study illustrate that any ionic liquids identified as good candidates based upon their air filtration ability and basic toxicity studies need to be evaluated first for plant viability before studying the efficacy of the full plant-based air filtration system for toxin removal.

Research paper thumbnail of Formaldehyde removal by common indoor plant species and various growing media

Atmospheric Environment, 2011

Three porous materials (growstone, expanded clay and activated carbon) were evaluated as hydropon... more Three porous materials (growstone, expanded clay and activated carbon) were evaluated as hydroponic growing media and for their individual ability to remove the indoor volatile organic compound formaldehyde under three conditions: growing medium alone, dry medium in a pot, and wet medium in a pot. The total percent-reduction of formaldehyde by each growing media was evaluated over a 10-h period. In all cases, activated carbon achieved the highest removal under the three conditions studied with average percent reductions measured at about 98%. Four common interior plants: Hedera helix (English ivy), Chrysanthemum morifolium (pot mum), Dieffenbachia compacta (dump cane) and Epipremnum aureum (golden pathos) growing in growstone were then tested for their ability to remove formaldehyde. The removal capacity of the aerial plant parts (AP), the root zone (RZ) and the entire plant (EP) growing in growstone were determined by exposing the relevant parts to gaseous formaldehyde (w2000 mg m À3 ) in a closed chamber over a 24-h period. The removal efficiency between species and plant parts were compared by determining the time interval required to decrease about 2/3 of the total formaldehyde concentration reduction, T 2/3 . The T 2/3 measured were 23, 30, 34 and 56 min for EP of C. morifolium, E. aureum, D. compacta and H. helix, respectively. The formaldehyde removal by the root zone was found to be more rapid than the removal by the aerial plant parts.