Biosorption of lead using Penicillium notatum dead biomass from aqueous solutions

Khodabakhshi, Abbas; Mohammadi‐Moghadam, Fazel; Sedehi, Morteza; Abdizadeh, Rahman; Shakeri, Kobra

doi:10.5004/dwt.2019.23987

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…In other words, some adsorption sites remain unsaturated during the adsorption process. These findings are in line with those of Zheng et al (23), Wang et al (24), and Khodabakhshi et al (25).…”

Section: Effect Of Mixing Speedsupporting

confidence: 93%

Removal of mercury (II) from aqueous solutions by multiwalled carbon nanotubes coated with manganese oxide

Khodabakhshi

Asgarian

2019

J Shahrekord Univ Med Sci

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Background and aims: Water pollution by heavy metals is one of the most important environmental problems. Among the heavy metals, mercury (Hg) is a very toxic metal and its high concentration can lead to impaired pulmonary and renal dysfunction. The aim of this study was to determine the amount of Hg removal by carbon nanotubes coated with manganese (Mn) oxide from aqueous solutions. Methods: In this study, multi-walled carbon nanotubes coated with Mn oxide were prepared and used to remove Hg from aqueous environments. In addition, the physical and structural characteristics of the nanotubes were determined by the X-ray diffraction (XRD). The impact of diverse variables was further investigated, including the initial concentration of Hg, the initial pH of the solution, contact time, mixing rate, as well as the amount of nano-composite and the impacts of confounders (nitrate and chloride). Finally, optimum conditions for each of these parameters were obtained by the Taguchi statistical method. Results: The XRD analysis showed that the nanotubes were properly coated with Mn oxide. Furthermore, the results demonstrated that under pH 7, the rate of mixing of 150 rpm, the contact time of 60 minutes, the amount of nano-composite of 60 mg, and the initial density of Hg 80 mg/L can be achieved by removing 95% Hg. Moreover, the confounder factors of nitrate and chloride reduced the amount of Hg removal by 4 and 5%, respectively. Conclusion: Based on the results, the nanotubes coated with Mn oxide can be used as easy and strong absorbents for the rapid absorption of Hg from drinking water and industrial wastewater.

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Section: Effect Of Mixing Speedsupporting

confidence: 93%

Removal of mercury (II) from aqueous solutions by multiwalled carbon nanotubes coated with manganese oxide

Khodabakhshi

Asgarian

2019

J Shahrekord Univ Med Sci

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“…Recently, there has been considerable interest in the use of microorganism-based biosorbent materials [11]. Biosorption includes all practical processes for the adsorption of heavy metals by the microorganisms' cells (bacteria, fungi, and algae) and the accumulation of heavy metal ions inside and outside of the cell [8,12]. In this case, the heavy metals are removed through various mechanisms such as physical adsorption, ion exchange, and microsurface precipitation [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…In this case, the heavy metals are removed through various mechanisms such as physical adsorption, ion exchange, and microsurface precipitation [13,14]. Filamentous and yeast fungal biomasses have a great ability to adsorb metals among other microorganisms [12,15]. Fungi have received more attention due to their special cell wall and the presence of various organic compounds such as carboxylic groups, sugars, fats, and proteins, and active sites that have the ability to bind metal ions [16,17].…”

Section: Introductionmentioning

confidence: 99%

Equilibrium and Thermodynamic Studies on the Biosorption of Lead (II) by Living and Nonliving Biomass of Penicillium notatum

Khodabakhshi

Mohammadi‐Moghadam

Shakeri

et al. 2022

Journal of Chemistry

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This study aims to investigate the biosorption of Pb (II) by living and nonliving biomass of Penicillium notatum. Penicillium notatum PTCC 5074 was purchased from Iran Scientific-Industrial Research Organization in lyophilized form and after culturing in potato dextrose agar was propagated in Sabouraud dextrose broth medium. The highest adsorption by living and nonliving biomass (180.74 and 187.08 mg/g per dry weight of biomass, respectively) was at the Pb (II) concentration of 228 mg/L and ionic strength of 43 mg/L in terms of Ca2+ and 1.2 g/L biomass concentration. The optimum contact time and temperature in nonliving biomass were 37 hours and 32.5°C, respectively. Kinetic studies showed that Pb(II) adsorption in both cases follows a pseudo-second-order reaction. The adsorption process was consistent with the Langmuir model in the nonliving state, whereas the favourite models for the living state were Langmuir and Freundlich. Thermodynamic constants indicated that the adsorption process by nonliving and living biomass were exothermic and endothermic, respectively. The obtained results showed that Penicillium notatum in living and nonliving states is suitable for the development of an efficient and economic biosorbent for the removal of Pb (II) from aqueous environments.

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New insights into the role of metal(loid)s in the development of ulcerative colitis: a systematic review

Bagherzadeh

Mohammadi‐Moghadam

2023

Environ Sci Pollut Res

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Biosorption of lead using Penicillium notatum dead biomass from aqueous solutions

Cited by 5 publications

References 23 publications

Removal of mercury (II) from aqueous solutions by multiwalled carbon nanotubes coated with manganese oxide

Removal of mercury (II) from aqueous solutions by multiwalled carbon nanotubes coated with manganese oxide

Equilibrium and Thermodynamic Studies on the Biosorption of Lead (II) by Living and Nonliving Biomass of Penicillium notatum

New insights into the role of metal(loid)s in the development of ulcerative colitis: a systematic review

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