Biodegradation of formaldehyde from contaminated air using a laboratory scale static-bed bioreactor

Hajizadeh, Yaghoub; Rezaei, Mohsen

doi:10.4103/2277-9183.131804

Cited by 3 publications

(4 citation statements)

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“…[ 3 ] It has been reported that the EC by which formaldehyde is removed increases on repeated exposure which is in accordance with our results. [ 6 21 33 ] According to Table 1 , contributions of the potted soil along with roots in the formaldehyde removal accounted for 26.39% of the total removal by EP. The capacity of potted soils for removal of formaldehyde in the present study was considerably similar to those has been already reported in the literature.…”

Section: Discussionmentioning

confidence: 99%

“…At present, there are some techniques for eliminating formaldehyde from the indoor air such as biological methods, adsorption on activated carbon fibers, photocatalytic oxidation, and biofiltration; nevertheless, none of them are fully satisfactory due to low concentrations as well as the volatile characteristic of this chemical. [ 19 20 21 22 ] Beside this, increasing the ventilation rate is difficult and not economical for public. Phytoremediation has attracted much consideration in recent decades probably due to it's environmental, economic and social benefits.…”

Section: Introductionmentioning

confidence: 99%

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Phytoremediation of formaldehyde from indoor environment by ornamental plants: An approach to promote occupants health

2018

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Background:Formaldehyde is a common hazardous indoor air pollutant which recently raised public concerns due to its well-known carcinogenic effects on human. The aim of this study was to investigate a potted plant-soil system ability in formaldehyde removal from a poor ventilated indoor air to promote dwellers health.Methods:For this purpose, we used one of the common interior plants from the fern species (Nephrolepis obliterata), inside a Plexiglas chamber under controlled environment. Entire plant removal efficiency and potted soil/roots contribution were determined by continuously introducing different formaldehyde vapor concentrations to the chamber (0.6–11 mg/m3) each over a 48-h period. Sampling was conducted from inlet and outlet of the chamber every morning and evening over the study period, and the average of each stage was reported.Results:The results showed that the N. obliterata plant efficiently removed formaldehyde from the polluted air by 90%–100%, depending on the inlet concentrations, in a long time exposure. The contribution of the soil and roots for formaldehyde elimination was 26%. Evaluation of the plant growing characteristics showed that the fumigation did not affect the chlorophyll content, carotenoid, and average height of the plant; however, a decrease in the plant water content was observed.Conclusions:According to the results of this study, phytoremediation of volatile organic compound-contaminated indoor air by the ornamental potted plants is an effective method which can be economically applicable in buildings. The fern species tested here had high potential to improve interior environments where formaldehyde emission is a health concern.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phytoremediation of formaldehyde from indoor environment by ornamental plants: An approach to promote occupants health

2018

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“…Formaldehyde vapor was obtained from the biofilter outlet using a pump with an attached impinger and their flow was controlled using a rotameter setup. Impinger was filled with 1% sodium sulfite solution to absorb formaldehyde gases (Hajizadeh & Rezaei, 2014). Formaldehyde is removed from the biofilter column using filter media; the polluted stream gas (i.e., formaldehyde) utilizes the filter media using the stability of microbial metabolism activities.…”

Section: Experimental Biofilter Setupmentioning

confidence: 99%

“…The microbial growth developed in the filter media was analyzed for the presence of gram-straining bacteria, as reported by Hajizadeh &Rezaei (2014). The results (Fig.…”

Section: Behavior Of Filter Media and Microbial Characteristicsmentioning

confidence: 99%

Formaldehyde degradation using Biofilter loaded with Compost, Vermiculite and Activated Carbon: Performance and Optimization

2024

Global NEST: The International Journal

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<p>Formaldehyde is one of the typical indoor pollutants causing theprevalence of acute health issues among those residing in indoor environments. Biofiltrationis a commonly adopted technique to treat indoor air pollutants. In this investigation, a biofilter was fabricated and compactly filled with compost, vermiculite and activated carbon (65:25:10) as a media composition for enhanced formaldehyde degradation. The influence of formaldehyde inlet concentration (0.01 – 1 gm-3g/m3) and EBRT (30 – 180 s) was studied to evaluate the biofilter performance. Their progression was assessed with dynamic operations in five phases with two stages each. The formaldehyde removal was achieved between the range of 32% to 98% with regular intervals of EBRT at 30, 60, 90, 120, 150 and 180 seconds, which depend upon varying their flow rate and inlet loading rate. The biofilter performance lasted for over 202 days with a 98% formaldehyde removal and 23 g/m3h-1biofilter capacity under the maximum EBRT (180 s) and inlet formaldehyde concentration (1 gm-3g/m3). The experimental findings demonstrated the efficacy of biofilter in withstanding substantial formaldehyde loading rate while maintaining an acceptable EBRT. The primary microbe responsible for formaldehyde degradation was identified to be as gram-negative bacteria.</p>

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Biodegradation of formaldehyde gas pollutant by a novel immobilized haloalkaliphilic Salipaludibacillus agaradhaerens strain NRC-R isolated from hypersaline soda lakes

Mohamed,

Awad,

Ibrahim

2023

Results in Engineering

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Biodegradation of formaldehyde from contaminated air using a laboratory scale static-bed bioreactor

Cited by 3 publications

References 1 publication

Phytoremediation of formaldehyde from indoor environment by ornamental plants: An approach to promote occupants health

Phytoremediation of formaldehyde from indoor environment by ornamental plants: An approach to promote occupants health

Formaldehyde degradation using Biofilter loaded with Compost, Vermiculite and Activated Carbon: Performance and Optimization

Biodegradation of formaldehyde gas pollutant by a novel immobilized haloalkaliphilic Salipaludibacillus agaradhaerens strain NRC-R isolated from hypersaline soda lakes

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