Removal of heavy metals and hydrocarbons by microalgae from wastewater in the steel industry

Blanco-Vieites, M.; Suárez-Montes, D.; Delgado, Francisco; Álvarez-Gil, María; Battez, A. Hernández; Rodríguez, Edgar Charry

doi:10.1016/j.algal.2022.102700

Cited by 50 publications

(16 citation statements)

References 46 publications

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“…Algae and cyanobacteria are usually used for water decontamination in general rather than specifically for metal recovery. [28] This causes some divergences in the optimization of metal sorption. Water decontamination seeks the complete removal of metal from the wastewater, often resulting in the addition of high biomass amounts for low metal concentrations.…”

Section: Introductionmentioning

confidence: 99%

The role of biomass elemental composition and ion-exchange in metal sorption by algae

et al. 2023

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Section: Introductionmentioning

confidence: 99%

The role of biomass elemental composition and ion-exchange in metal sorption by algae

et al. 2023

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“…Their excess can cause adverse physiological effects. Other metals, such as Cd(II), are often reported in water bodies because of their numerous applications in industrial processes ( Bulgariu and Bulgariu, 2005 ; Blanco-Vieites et al., 2022 ), but do not play any role in the cell metabolism process. Their presence can cause the inhibition of cell growth, disturbance of the photosynthesis process, and changes in cell permeability ( Watanabe and Suzuki, 2002 ; Bergsten-Torralba et al., 2020 ; He et al., 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Molecular changes in phenolic compounds in Euglena gracilis cells grown under metal stress

Bernard

Guéguen

2023

Front. Plant Sci.

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Metal presence in the aquatic ecosystem has increased and diversified over the last decades due to anthropogenic sources. These contaminants cause abiotic stress on living organisms that lead to the production of oxidizing molecules. Phenolic compounds are part of the defense mechanisms countering metal toxicity. In this study, the production of phenolic compounds by Euglena gracilis under three different metal stressors (i.e. cadmium, copper, or cobalt) at sub-lethal concentration was assessed using an untargeted metabolomic approach by mass spectrometry combined with neuronal network analysis (i.e. Cytoscape). The metal stress had a greater impact on molecular diversity than on the number of phenolic compounds. The prevalence of sulfur- and nitrogen-rich phenolic compounds were found in Cd- and Cu-amended cultures. Together these results confirm the impact of metallic stress on phenolic compounds production, which could be utilized to assess the metal contamination in natural waters.

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“…Overexploitation and deterioration of natural water supplies are the results of the rise in global population over the past century. (UNESCO 2021 ; Blanco-Vieites et al 2022 ). Industrial activities are responsible for 23% of total water consumption (Blanco-Vieites et al 2022 ).…”

Section: Introductionmentioning

confidence: 99%

“…(UNESCO 2021 ; Blanco-Vieites et al 2022 ). Industrial activities are responsible for 23% of total water consumption (Blanco-Vieites et al 2022 ). Our water resources’ quality is getting worse every day as a result of the persistent introduction of harmful substances into them.…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of n-alkanes, polycyclic aromatic hydrocarbons, and heavy metals from wastewater using seaweeds

Akl,

Ahmed,

El-Sheekh

et al. 2023

Environ Sci Pollut Res

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The removal of n-alkanes, polycyclic aromatic hydrocarbons, and heavy metals from wastewater using three dried seaweeds Ulva intestinalis Linnaeus (green alga), Sargassum latifolium (Turner) C.Agardh (brown alga), and Corallina officinalis Kützing (red alga) has been shown to evaluate their potential usage as inexpensive adsorbents. Under natural environmental conditions, numerous analytical methods, including zeta potential, energy dispersive X-ray spectroscopy (EDX), SEM, and FT-IR, are used in this study. The results showed that n-alkanes and polycyclic aromatic hydrocarbons adsorption increased with increasing contact time for all three selected algae, with a large removal observed after 15 days, while the optimal contact time for heavy metal removal was 3 h. S. latifolium dry biomass had more potential as bioadsorbent, followed by C. officinalis and then U. intestinalis. S. latifolium attained removal percentages of 65.14%, 72.50%, and 78.92% for light n-alkanes, heavy n-alkanes, and polycyclic aromatic hydrocarbons (PAHs), respectively, after 15 days. Furthermore, it achieved removal percentages of 94.14, 92.62, 89.54, 87.54, 82.76, 80.95, 77.78, 73.02, and 71.62% for Mg, Zn, Cu, Fe, Cr, Pb, Cd, Mn, and Ni, respectively, after 3 h. Carboxyl and hydroxyl from FTIR analysis took part in wastewater treatment. The zeta potentials revealed that algal cells have a negatively charged surface, and the cell surface of S. latifolium has a more negative surface charge than U. intestinalis and C. officinalis. Our study suggests that seaweeds could play an important role in wastewater treatment and thus help as an economical, effective, and ecofriendly bioremediation system for ecological health and life protection.

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Removal of heavy metals and hydrocarbons by microalgae from wastewater in the steel industry

Cited by 50 publications

References 46 publications

The role of biomass elemental composition and ion-exchange in metal sorption by algae

The role of biomass elemental composition and ion-exchange in metal sorption by algae

Molecular changes in phenolic compounds in Euglena gracilis cells grown under metal stress

Bioremediation of n-alkanes, polycyclic aromatic hydrocarbons, and heavy metals from wastewater using seaweeds

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