Fixed bed mycofilter column optimization and performance evaluation through the removal of a food coloring agent from an aqueous solution

Mnkandla, Sanele Michelle; Otomo, Patricks Voua

doi:10.1080/10889868.2023.2236644

Cited by 4 publications

(2 citation statements)

References 26 publications

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“…Recent work done in our lab (Mnkandla and Otomo 2023) found that the pH point of zero charge (i.e., the pH value where the surface density of positive charges equals that of negative charges) of the P. ostreatus myco lter was 6.5, thus any pH above this would result in the surface charge of the myco lter being negatively charged, allowing for the binding of positively charged cations. In this instance where pH = 7, iron (III) could biosorb on the myco lter.…”

Section: Discussionmentioning

confidence: 96%

“…Myco lters were prepared as described by Stamets and Chilton (1983) and Stamets et al (2013), with slight modi cations as outlined by Mnkandla and Otomo (2023). Brie y, thatching straw was collected from a veld near the University of the Free State, Qwaqwa, South Africa, and shred into small particles (1-2 mm) using a herb grinder, prior to soaking overnight in tap water containing 2% (w/v) calcitic lime.…”

Section: Preparation Of Myco Ltersmentioning

confidence: 99%

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Mycofiltration of aqueous iron (III) and imidacloprid solutions, and the effects of the filtrates on selected biomarkers of the freshwater snail Helisoma duryi

Mnkandla

Mosoabisane

Basopo³

et al. 2023

Preprint

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A mycofilter made of Pleurotus ostreatus was used for the removal of iron (III) and imidacloprid from aqueous solutions. Batch mycofiltration, at a dosage of 1g of mycofilter per 50 ml, was performed on iron (III) solutions of different concentrations (0.99, 10.7, 22.9, and 27.72 mg/L) and pH (3.3, 7 and 11). For column mycofiltration, the mycofilter was packed into pyrex columns (3.3 x 15 cm) to desired bed heights. Iron (III) and imidacloprid solutions of 18.99 mg/L and 234.70 ng/L, respectively, were filtered at a constant flow rate. Thereafter, Helisoma duryi snails were exposed for 96 hours to the respective filtrates, and their catalase and acetylcholinesterase activities were assessed. Batch mycofiltration showed iron (III) removal rates as high as 85%. Column mycofiltration showed removal rates of 94 and 31% for iron (III) and imidacloprid, respectively. Catalase activity was significantly reduced (p < 0.05) in the snails exposed to iron (III) or imidacloprid filtrates, compared to the snails exposed to the non-mycofiltered media. A significantly higher acetylcholinesterase activity was induced by iron (III) filtrates in comparison with the non-mycofiltered media (p < 0.05). There were no significant differences in acetylcholinesterase activity (p > 0.05) in the snails exposed to mycofiltered and non-mycofiltered imidacloprid media. Mycofilter characterisation using Fourier Transform Infrared Spectrophotometry revealed significant changes in transmittance intensity in the mycofilters used for the iron (III) vs the ones used for the imidacloprid solutions. Mycofiltration was found to improve water quality although iron (III) was removed more effectively than imidacloprid.

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Section: Discussionmentioning

confidence: 96%

Section: Preparation Of Myco Ltersmentioning

confidence: 99%

Mycofiltration of aqueous iron (III) and imidacloprid solutions, and the effects of the filtrates on selected biomarkers of the freshwater snail Helisoma duryi

Mnkandla

Mosoabisane

Basopo³

et al. 2023

Preprint

View full text Add to dashboard Cite

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Mycofiltration of Aqueous Iron (III) and Imidacloprid Solutions, and the Effects of the Filtrates on Selected Biomarkers of the Freshwater Snail Helisoma duryi

Mnkandla,

Mosoabisane,

Basopo

et al. 2024

Arch Environ Contam Toxicol

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To alleviate the burden of water contamination, a newly developed form of bioremediation known as mycofiltration can be employed. Mycofiltration is an environment-friendly technology involving the treatment of contaminated water by passing it through a network of saprophytic fungal mycelium. A mycofilter made of Pleurotus ostreatus was used for the removal of iron (III) and imidacloprid from aqueous solutions. Batch mycofiltration, at a dosage of 1 g of mycofilter per 50 mL, was performed on iron (III) solutions of different concentrations (0.99, 10.7, 22.9, and 27.72 mg/L) and pH (3.3, 7 and 11). For column mycofiltration, the mycofilter was packed into pyrex columns (3.3 × 15 cm) to desired bed heights. Iron (III) and imidacloprid solutions of 18.99 mg/L and 234.70 ng/L, respectively, were filtered at a constant flow rate. Thereafter, Helisoma duryi snails were exposed for 96 h to the respective filtrates, and their catalase and acetylcholinesterase activities were assessed. Batch mycofiltration showed iron (III) removal rates as high as 85%. Column mycofiltration showed removal rates of 94 and 31% for iron (III) and imidacloprid, respectively. Catalase activity was significantly reduced (p < 0.05) in the snails exposed to iron (III) or imidacloprid filtrates, compared to the snails exposed to the non-mycofiltered media. A significantly higher acetylcholinesterase activity was induced by iron (III) filtrates in comparison with the non-mycofiltered media (p < 0.05). There were no significant differences in acetylcholinesterase activity (p > 0.05) in the snails exposed to mycofiltered and non-mycofiltered imidacloprid media. Mycofilter characterisation using Fourier Transform Infrared Spectrophotometry revealed significant changes in transmittance intensity in the mycofilters used for the iron (III) vs the ones used for the imidacloprid solutions. Mycofiltration was found to improve water quality although iron (III) was removed more effectively than imidacloprid.

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Edible mushrooms help to purify contaminated water

Rita

2024

Nat Africa

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Fixed bed mycofilter column optimization and performance evaluation through the removal of a food coloring agent from an aqueous solution

Cited by 4 publications

References 26 publications

Mycofiltration of aqueous iron (III) and imidacloprid solutions, and the effects of the filtrates on selected biomarkers of the freshwater snail Helisoma duryi

Mycofiltration of aqueous iron (III) and imidacloprid solutions, and the effects of the filtrates on selected biomarkers of the freshwater snail Helisoma duryi

Mycofiltration of Aqueous Iron (III) and Imidacloprid Solutions, and the Effects of the Filtrates on Selected Biomarkers of the Freshwater Snail Helisoma duryi

Edible mushrooms help to purify contaminated water

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