LEAF COLOR SEGMENTATION AND POT VOLUME INFLUENCE ON THE CO2 ABSORPTION EFFICIENCY IN TWO COMMON GREEN-WALL PLANTS

ABSTRACT Green walls can improve indoor air-quality by reducing concentrations of carbon dioxide (CO2) and other air pollutants. Our study focused on the spider plant, Chlorophytum comosum, and devil’s ivy, Epipremnum aureum, both common green-wall plants that have been found to be efficient CO2 absorbers. Both species have multiple variants with varying degrees of leaf green-white segmentation. Since photosynthesis depends on the concentration of leaf chlorophylls, we hypothesized that green variants are more efficient carbon absorbers than green-white variants. In addition, we tested the hypothesis that the photosynthetic rate of plants is affected by pot volume, as suggested by previous studies. We used a portable gas exchange system to determine the rate of photosynthesis of the study plants. No evidence was found for better photosynthetic performance in the green vs. green-white variants of each species. In fact, our results suggest the opposite. It was observed that a spider plants assimilated carbon more efficiently when grown in a larger pot volume. In conclusion, our study shows that in terms of carbon assimilation, green-white variants of spider plants are the better choice for indoor green walls. Their efficiency can be improved dramatically by increasing pot volume.

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A study on CO2 absorption using hybrid solvents in packed columns

International Journal of Low-Carbon Technologies ◽

10.1093/ijlct/ctz051 ◽

2019 ◽

Cited By ~ 1

Author(s):

Ravinder Kumar ◽

Mohammad Hossein Ahmadi ◽

Dipen Kumar Rajak ◽

Mohammad Alhuyi Nazari

Keyword(s):

Carbon Dioxide ◽

Co2 Capture ◽

Power Plants ◽

Large Scale ◽

Carbon Dioxide Capture ◽

Packed Column ◽

Absorption Efficiency ◽

Co2 Absorption ◽

Process Industries ◽

Carbon Dioxide Co2

Abstract Greenhouse gases emissions from large scale industries as well as gasoline based vehicles are mainly responsible for global warming since the 1980s. At present, it has triggered global efforts to reduce the level of GHG. The contribution of carbon dioxide (CO2) in polluting the environment is at a peak due to the excessive use of coal in power plants. So, serious attention is required to reduce the level of CO2 using advanced technologies. Carbon dioxide capture and storage may play an important role in this direction. In process industries, various carbon dioxide capture techniques can be used to reduce CO2 emissions. However, post-combustion carbon dioxide capture is on top priority. Nowadays the researcher is focusing their work on CO2 capture using hybrid solvent. This work highlights a review of carbon dioxide capture using various kind of hybrid solvent in a packed column. The various challenges for absorption efficiency enhancement and future direction are also discussed in the present work. It is concluded through the literature survey that hybrid solvent shows better efficiency in comparison to the aqueous solution used for CO2 capture.

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Morphological Changes of Mexican Native Succulent Plants in a Vertical Greenery System Compared with Pot Conditions

HortTechnology ◽

10.21273/horttech03988-18 ◽

2018 ◽

Vol 28 (3) ◽

pp. 304-309

Author(s):

Carlos Efraín Reyes-González ◽

José Pablo Torres-Morán ◽

Blanca Catalina Ramírez-Hernández ◽

Liberato Portillo ◽

Enrique Pimienta-Barrios ◽

...

Keyword(s):

Principal Component Analysis ◽

Morphological Traits ◽

Morphological Changes ◽

Statistical Significance ◽

Principal Component ◽

Leaf Length ◽

Chlorophytum Comosum ◽

Green Walls ◽

Succulent Plants ◽

Spider Plant

Adaptation parameters as leaf width, leaf length, mesophyll thickness, number of adaxial and abaxial stomata, and biomass were measured in eight stonecrop species (Crassulaceaae), spider plant (Chlorophytum comosum), and maria’s heart (Peperomia tepoztecoana) in vertical greenery system (VGS) and containers (POT). Statistical significance among parameters was probed by t test and principal component analysis was performed to detect global morphological changes. Mexican gem (Echeveria elegans), graptosedum (× Graptosedum ‘Vera Higgins’), lavender scallops (Kalanchoe fedtschenkoi), coppertone sedum (Sedum nussbaumerianum), ghost plant (Graptopetalum paraguayense), and jelly-beans (Sedum rubrotinctum) were the species that did not change significantly their morphological traits during growth in the VGS. This provides evidence of the potential for these species to be used in green walls or any VGS while maintaining their characteristic shape and beauty. Graptopetalum (Graptopetalum macdougalli), gray sedum (Sedum griseum), maria’s heart, and spider plant showed changes in its morphology during growth in the VGS when compared with growth in POT, indicating a lower potential for adaption to VGS.

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Performance of spider plant (Chlorophytum comosum) in modular vertical green walls under various media and nutrients

ANNALS OF PLANT AND SOIL RESEARCH ◽

10.47815/apsr.2020.10013 ◽

2020 ◽

pp. 410-414

Author(s):

D DHANASEKARAN

Keyword(s):

Visual Quality ◽

Leaf Length ◽

Root Weight ◽

Foliar Nutrition ◽

Size Index ◽

Chlorophytum Comosum ◽

Number Of Leaves ◽

Green Walls ◽

Shoot Weight ◽

Spider Plant

An investigation was carried out to study the performance of various media and nutrients for spider plant (Chlorophytum comosum) in modular vertical walls under vertical green walls in the Department of Horticulture, Annamalai University, Annamalai Nagar (Tamil Nadu) during 2018 to 2020. The experiment comprised of four media viz., coco peat, greenosil, perlite and vermiculite and their combinations and two nutrients viz., foliar nutrition (Grosure NPK 19:19:19 and @ 1% twice (30 and 90 days after planting)) and fertilizer stick (Greenstix sticks were inserted to the modular containers @ one per container at 30 and 90 days after planting). Results revealed that, among the media, plants grown under vermiculite showed better performance in exhibiting maximum values for plant height (24.9 cm), number of leaves (21.6), leaf length (23.8 cm), leaf width (2.43), leaf area (30.9 cm2), shoot weight (15.1 g plant-1), root weight (3.4 g plant-1), biomass (18.4 g plant-1), size index (24.7 cm), and visual quality (9.08). However, among the nutrients, plants inserted with fertilizer stick recorded highest values for plant height (20.9 cm), number of leaves (18.8), leaf length (20.9 cm), leaf width (2.21), leaf area (30.2 cm2), shoot weight (14.8 g plant-1), root weight (3.24 g plant-1), biomass (18.1 g plant-1), size index (22.5 cm), and visual quality (8.49). compared with foliar nutrition. The interaction between media and nutrients was significant and plants grown under vermiculite and containers inserted with fertilizer stick showed superior performance in exerting maximum values for all the characters than other treatment combinations.

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Effects of the Water Content of Soda Lime on Compound A Concentration in the Anesthesia Circuit in Sevoflurane Anesthesia

Anesthesiology ◽

10.1097/00000542-199801000-00012 ◽

1998 ◽

Vol 88 (1) ◽

pp. 66-71 ◽

Cited By ~ 15

Author(s):

Hiromichi Bito ◽

Yukako Ikeuchi ◽

Kazuyuki Ikeda

Keyword(s):

Gas Flow ◽

Soda Lime ◽

Absorption Capacity ◽

Low Flow ◽

Co2 Absorption ◽

Sevoflurane Anesthesia ◽

Compound A ◽

Carbon Dioxide Co2 ◽

End Tidal ◽

Co2 Elimination

Background Sevoflurane anesthesia is usually performed with fresh gas flow rates greater than 2 l/min due to the toxicity of compound A in rats and limited clinical experience with sevoflurane in low-flow systems. However, to reduce costs, it would be useful to identify ways to reduce compound A concentrations in low-flow sevoflurane anesthesia. This goal of this study was to determine if compound A concentrations can be reduced by using soda lime with water added. Methods Low-flow sevoflurane anesthesia (fresh gas flow of 1 l/min) was performed in 37 patients using soda lime with water added (perhydrated soda lime) or standard soda lime as the carbon dioxide (CO2) absorbent. The soda lime was not changed between patients, but rather was used until CO2 rebreathing occurred. The perhydrated soda lime was prepared by spraying 100 ml distilled water onto 1 kg fresh soda lime, and water was added only when a new bag of soda lime was placed into the canister. Compound A concentrations in the circle system, soda lime temperatures, inspired and end-tidal CO2 and end-tidal sevoflurane concentrations, and CO2 elimination by the patient were measured during anesthesia. Results Compound A concentrations were significantly lower for the perhydrated soda lime (1.9 +/- 1.8 ppm; means +/- SD) than for the standard soda lime (13.9 +/- 8.2 ppm). No differences were seen between the two types of soda lime with regard to the temperature of the soda lime, end-tidal sevoflurane concentrations, or CO2 elimination. Compound A concentration decreased with the total time of soda lime use for both types of soda lime. The CO2 absorption capacity was significantly less for perhydrated soda lime than for standard soda lime. Conclusions Compound A concentrations in the circuit can be reduced by using soda lime with water added. The CO2 absorption capacity of the soda lime is reduced by adding water to it, but this should not be clinically significant.

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Assessment of carbon dioxide separation by amine solutions using electrolyte non-random two-liquid and Peng-Robinson models: Carbon dioxide absorption efficiency

Journal of Construction Materials ◽

10.36756/jcm.v2.3.10 ◽

2021 ◽

Vol 2 (3) ◽

Author(s):

Arash Esmaeili ◽

◽

Zhibang Liu ◽

Yang Xiang ◽

Jimmy Yun ◽

...

Keyword(s):

Carbon Dioxide ◽

Co2 Concentration ◽

Liquid Hydrocarbon ◽

Absorption Efficiency ◽

High Reactivity ◽

Proper Solution ◽

Co2 Absorption ◽

Carbon Dioxide Absorption ◽

Operational Conditions ◽

Wide Range

A high pressure carbon dioxide (CO2) absorption from a specific gas in a conventional column has been evaluated by the Aspen HYSYS simulator using a wide range of single absorbents and blended solutions to estimate the outlet CO2 concentration, absorption efficiency and CO2 loading to choose the most proper solution in terms of CO2 capture for environmental concerns. The property package (Acid Gas-Chemical Solvent) which is compatible with all applied solutions for the simulation in this study, estimates the properties based on an electrolyte non-random two-liquid (E- NRTL) model for electrolyte thermodynamics and Peng-Robinson equation of state for the vapor and liquid hydrocarbon phases. Among all the investigated single amines as well as blended solutions, piperazine (PZ) and the mixture of piperazine and monoethanolamine (MEA) have been found as the most effective absorbents respectively for CO2 absorption with high reactivity based on the simulated operational conditions.

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Numerical simulation of carbon dioxide (CO2) absorption and interfacial mass transfer across vertically wavy falling film

Chemical Engineering Science ◽

10.1016/j.ces.2014.05.002 ◽

2014 ◽

Vol 116 ◽

pp. 243-253 ◽

Cited By ~ 18

Author(s):

Jianguang Hu ◽

Xiaogang Yang ◽

Jianguo Yu ◽

Gance Dai

Keyword(s):

Carbon Dioxide ◽

Numerical Simulation ◽

Mass Transfer ◽

Co2 Absorption ◽

Falling Film ◽

Interfacial Mass Transfer ◽

Carbon Dioxide Co2

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Determining the carbon footprint for a new earthen-based finish

International Journal of Low-Carbon Technologies ◽

10.1093/ijlct/ctz045 ◽

2019 ◽

Vol 15 (1) ◽

pp. 143-148 ◽

Cited By ~ 1

Author(s):

Yolanda G Aranda-Jimenez ◽

Edgardo J Suarez-Dominguez

Keyword(s):

Carbon Dioxide ◽

Carbon Footprint ◽

Organic Materials ◽

Architecture Design ◽

Co2 Absorption ◽

A Value ◽

Co2 Equivalent ◽

Carbon Dioxide Co2

Abstract In the present work the carbon footprint for a material developed in the Faculty of Architecture, Design and Urbanism of the Autonomous University of Tamaulipas (UAT) constituted by argillaceous earth, aloe juice and fiber of ixtle with utility like the inner coating of walls in buildings was determined. The objective of this paper is the calculation of the contribution of carbon dioxide (CO2) by the plant, considering the stoichiometry of CO2 absorption accompanied by the determination at the laboratory level. It was found that the use of organic materials in mortar mixtures, when they are produced manually by the person who will use them, and that is common in cases of self-construction, can generate approximately −0.45 kg of CO2 equivalent for each kilogram of plant produced for the preparation of mixtures. In addition, the equivalent CO2 was calculated for the elaboration of a cubic meter of useful mixture as a wall covering obtaining a value below the equivalent 14 kg of CO2.

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The influence of green walls on interior climate conditions and human health

MATEC Web of Conferences ◽

10.1051/matecconf/201928202041 ◽

2019 ◽

Vol 282 ◽

pp. 02041

Author(s):

Jitka Peterková ◽

Magdaléna Michalčíková ◽

Vítězslav Novák ◽

Richard Slávik ◽

Jiří Zach ◽

...

Keyword(s):

Relative Humidity ◽

Human Health ◽

Well Being ◽

Interior Space ◽

Green Wall ◽

Climate Conditions ◽

Limit Value ◽

Technical Requirements ◽

Green Walls ◽

Mental Well Being

In recent years, many researchers have addressed the issue of interior climate and how it affects human health. Investigations performed at schools and office buildings have found that CO2 concentrations often exceed the limit value of 1500 ppm given in Decree No. 20/2012 Coll., on technical requirements for buildings. In addition, interior space often exhibits very low relative humidity. This results in poor conditions that are detrimental to human health and not conducive to studying and work. One means of improving the interior microclimate is implementing green walls. These walls can help generate a much better climate and greatly enhance the mental well-being of the inhabitants. In addition, they greatly improve dust levels and acoustics in the room. The research compared the interior conditions in two classrooms at the Faculty of Civil Engineering, Brno University of Technology. One had a green wall installed while the other was in its original configuration. CO2 concentration, temperature, and relative humidity were measured. A survey was conducted to assess the influence of the green wall on students and teachers (mental well-being, efficiency, productivity, creativity, etc.). Results obtained thus far show that the room with the green wall provides far better interior conditions, mainly in terms of lower CO2 concentration and higher relative humidity, improving students’ and teachers’ mood and health (as confirmed by the survey as well).

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