Phycoremediation and adsorption isotherms of cadmium and copper ions by Merismopedia tenuissima and their effect on growth and metabolism

Fawzy, Mustafa A.

doi:10.1016/j.etap.2016.07.008

Cited by 35 publications

(13 citation statements)

References 23 publications

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“…Table 5 provides a comparison of the removal efficiency (percentage) of Cd 2+ ions in this study to that determined in other studies published in the literature 14 , 60 , 69 – 74 . The Cd 2+ elimination efficiency achieved in this study was much higher than that described for other biosorbents.…”

Section: Resultsmentioning

confidence: 91%

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Process optimization and modeling of Cd2+ biosorption onto the free and immobilized Turbinaria ornata using Box–Behnken experimental design

Fawzy

Darwish

Alharthi

et al. 2022

Sci Rep

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The release of effluents containing cadmium ions into aquatic ecosystems is hazardous to humans and marine organisms. In the current investigation, biosorption of Cd2+ ions from aqueous solutions by freely suspended and immobilized Turbinaria ornata biomasses was studied. Compared to free cells (94.34%), the maximum Cd2+ removal efficiency reached 98.65% for immobilized cells obtained via Box–Behnken design under optimized conditions comprising algal doses of 5.04 g L−1 and 4.96 g L−1, pH values of 5.06 and 6.84, and initial cadmium concentrations of 25.2 mg L−1 and 26.19 mg L−1, respectively. Langmuir, Freundlich, and Temkin isotherm models were suitably applied, providing the best suit of data for free and immobilized cells, but the Dubinin–Radushkevich model only matched the immobilized algal biomass. The maximum biosorption capacity of Cd2+ ions increased with the immobilized cells (29.6 mg g−1) compared to free cells (23.9 mg g−1). The Cd2+ biosorption data obtained for both biomasses followed pseudo-second-order and Elovich kinetic models. In addition, the biosorption process is controlled by film diffusion followed by intra-particle diffusion. Cd2+ biosorption onto the free and immobilized biomasses was spontaneous, feasible, and endothermic in nature, according to the determined thermodynamic parameters. The algal biomass was further examined via SEM/EDX and FTIR before and after Cd2+ biosorption. SEM/EDX analysis revealed Cd2+ ion binding onto the algal surface. Additionally, FTIR analysis confirmed the presence of numerous functional groups (hydroxyl, carboxyl, amine, phosphate, etc.) participating in Cd2+ biosorption. This study verified that immobilized algal biomasses constitute a cost-effective and favorable biosorbent material for heavy metal removal from ecosystems.

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Section: Resultsmentioning

confidence: 91%

“…Biosorption utilizes low-cost biosorbents such as grape shoots, olive roots, peat, rose waste, bacteria, yeasts, fungi, microalgae and marine macroalgae for heavy metal elimination from wastewaters 11 – 13 . Algal biomass exhibits significant and various affinities toward a number of heavy metals as sorbent materials 14 , 15 .…”

Section: Introductionmentioning

confidence: 99%

Process optimization and modeling of Cd2+ biosorption onto the free and immobilized Turbinaria ornata using Box–Behnken experimental design

Fawzy

Darwish

Alharthi

et al. 2022

Sci Rep

Self Cite

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“…The peaks at 824.84 and 778.66cm -1 , which were found in control and 100mg L -1 ZnO, respectively, are normally attributed to carbohydrates (Schrader, 1995). These results might indicate the synthesis of extra carbohydrates under an excessive level of ZnO NPs (Fawzy, 2016). The increase in the transmittance area at 610.32cm -1 that is indicated to aromatic compounds (Ramamurthy & Kannan, 2007), might suggest chelation of ZnO NPs.…”

Section: Effects Of Zno Nps On Macromoleculesmentioning

confidence: 94%

“…These changes might be attributed to the change in amide II under ZnO NPs stress. The increased intensity of the 1384.40cm -1 peak, which is related to the amide III (Fawzy, 2016), under ZnO NPs treatments could be linked to Zn-binding proteins.…”

Section: Effects Of Zno Nps On Macromoleculesmentioning

confidence: 98%

Zinc Oxide Nanoparticles Induce Changes in the Antioxidant Systems and Macromolecules in the Solanum nigrum Callus

2020

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Introduction Nanoparticles (NPs) from natural and anthropogenic sources can appear in the soil (Morales-Díaz et al., 2017; Kumar et al., 2019). Nowadays, NPs have been widely used in various products and industries, however, their release into the environment threatens living organisms (Zafar et al., 2016). Entry and toxicity concerning NPs to plants rely on the chemical construction and size that impacts the ligand-receptor interactions (Raliya et al., 2016). ZnO NPs are significantly used in various products as well as in the agriculture and food sector, like pesticides, fungicides, and fertilizers (Ghosh et al., 2016 ; Housseiny & Gomaa, 2019). The toxic impact of NPs has been reported as a result of size, morphology, nature, composition, reactivity, and other NPs capacities (Zaka et al.,

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“…The good fitting of data by the curve is confirmed by the parameters in Table 1. The values for constant n > 1 indicate the presence of highly energetic sites and heterogeneous surfaces 47 while the distribution of fiber diameters and magnetite nanoparticles could explain the nature of the adsorption process.…”

Section: Equilibrium Isothermsmentioning

confidence: 99%

Magnetite‐doped electrospun fibers forDNAadsorption

Cavalcante

2022

J of Applied Polymer Sci

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Gene delivery, biosensing-based diagnostic therapy, and in vivo responsive drugs are promising technologies based on the interaction of DNA with supports on the nanoscale. Typical advantages for nanomaterials applied in DNA removal are related to their high surface area and availability of cationic sites that favor the electrostatic interaction with the target (DNA). Herein, a magnetite-doped cationic polymer was explored as a support for the production of electrospun fibers that offer an abundance of the available sites for the adsorption of DNA while exploring the doping effect of magnetite for the improvement in the adsorption capacity and the magnetic removal from the reactor. The mechanisms of adsorption revealed that the Freundlich isotherm prevails in a process denoted by the pseudo-second-order kinetic model.

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Phycoremediation and adsorption isotherms of cadmium and copper ions by Merismopedia tenuissima and their effect on growth and metabolism

Cited by 35 publications

References 23 publications

Process optimization and modeling of Cd2+ biosorption onto the free and immobilized Turbinaria ornata using Box–Behnken experimental design

Process optimization and modeling of Cd2+ biosorption onto the free and immobilized Turbinaria ornata using Box–Behnken experimental design

Zinc Oxide Nanoparticles Induce Changes in the Antioxidant Systems and Macromolecules in the Solanum nigrum Callus

Magnetite‐doped electrospun fibers forDNAadsorption

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