Application of green microalgae biofilms for heavy metals removal from mine effluent

Makhanya, B. N.; Nyandeni, N.; Ndulini, S.F.; Mthembu, Mathews Simon

doi:10.1016/j.pce.2021.103079

Cited by 22 publications

(3 citation statements)

References 34 publications

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“…was about twice as much as that of microalgae I. galbana and P. tricornutum, while the adsorption capacity of these two eukaryotic microalgae was slightly higher than that of the three cyanobacteria A. cylindrica PCC 200, N. muscorum UTAD_N7122 and Spirulina sp.. Overall, the performance of macroalgae was better than that of eukaryotic microalgae, followed by cyanobacteria [65].…”

Section: Heavy Metalmentioning

confidence: 84%

Degradation and remediation of environmental pollutants by algae

Jing,

Shen,

Zhang

et al. 2023

TMBLS

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The usage of a large number of industrial resources and the discharge of harmful pollutants have caused serious damage to the environment and ultimately affect the ecosystem and human health. Bioremediation is a green, sustainable and low-cost technology for the treatment of environmental pollutants, which includes the process of environmental remediation using plants, animals, microorganisms and so on. Among them, algae have the characteristics of rapid growth, wide distribution, strong stress resistance, large enrichment, and can convert pollutants into chemical products, so they play an important role in bioremediation. In this review, we introduce the types of pollutants existing in the environment, analyze the mechanism of algae for environmental remediation, and then describe the research progress of algae in the process of degradation and remediation of different pollutants. Finally, the shortages and limitations of bioremediation using algae are discussed, and its future development is prospected.

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Section: Heavy Metalmentioning

confidence: 84%

Degradation and remediation of environmental pollutants by algae

Jing,

Shen,

Zhang

et al. 2023

TMBLS

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“…Acidophilic or acid-tolerant microalgae, which are widely found in AMD, are also highly tolerant or resistant to low pH and toxic metals. [18,19]. As a result, exploring the diversity of eukaryotic communities goes a long way in comprehending the ecological functions and survival strategies of organisms in extreme environments.…”

Section: Introductionmentioning

confidence: 99%

Eukaryotic Community Structure and Interspecific Interactions in a Stratified Acidic Pit Lake Water in Anhui Province

et al. 2023

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The stratified acidic pit lake formed by the confluence of acid mine drainage has a unique ecological niche and is a model system for extreme microbial studies. Eukaryotes are a component of the AMD community, with the main members including microalgae, fungi, and a small number of protozoa. In this study, we analyzed the structural traits and interactions of eukaryotes (primarily fungi and microalgae) in acidic pit lakes subjected to environmental gradients. Based on the findings, microalgae and fungi were found to dominate different water layers. Specifically, Chlorophyta showed dominance in the well-lit aerobic surface layer, whereas Basidiomycota was more abundant in the dark anoxic lower layer. Co-occurrence network analysis showed that reciprocal relationships between fungi and microalgae were prevalent in extremely acidic environments. Highly connected taxa within this network were Chlamydomonadaceae, Sporidiobolaceae, Filobasidiaceae, and unclassified Eukaryotes. Redundancy analysis (RDA) and random forest models revealed that Chlorophyta and Basidiomycota responded strongly to environmental gradients. Further analysis indicated that eukaryotic community structure was mainly determined by nutrient and metal concentrations. This study investigates the potential symbiosis between fungi and microalgae in the acidic pit lake, providing valuable insights for future eukaryotic biodiversity studies on AMD remediation.

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“…According to the values announced by the World Health organization (WTO) and Environmental Protection Agency (EPA), the maximum permissible limits of Cu(II) and Pb(II) in drinking water are 1 mg·L −1 [ 7 ] and 0.05 mg·L −1 [ 8 ], respectively. Once these metals are ingested beyond the maximum permissible limits, they may result in mutagenic and carcinogenic effects could cause further damage to multiple systems and organs of the human body, or even death [ 9 ]. Nowadays, remediate Cu(II) and Pb(II) contaminated water has been developed by various techniques, such as chemical precipitation, flocculation, ion exchange, membrane technology and permeable reactive barriers (PRBs) [ 10 ], among them, adsorption has low initial capital and maintenance costs and applicable to many technologies [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Mild Hydrothermal Synthesis of 11Å-TA from Alumina Extracted Coal Fly Ash and Its Application in Water Adsorption of Heavy Metal Ions (Cu(II) and Pb(II))

Yang

Sun

Peng

et al. 2022

IJERPH

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Non-biodegradable copper (Cu) and lead (Pb) contaminants in water are highly toxic and have series adverse effects. Therefore, it is very important to extract heavy metals from wastewater before it is discharged into the environment. Adsorption is a cost-effective alternative method for wastewater treatment. Choosing a low-cost adsorbent can help reduce the cost of adsorption. In this study, conversion of reside after extracting aluminum (REA) produced by sub-molten salt method transform high-alumina coal fly ash (CFA) into 11Å-tobermorite to adsorb Cu(II) and Pb(II) from aqueous solutions at room temperature. The synthesis of the adsorbent was confirmed using scanning electron microscope (SEM), X-ray diffractometer (XRD) and Brunauer–Emmett–Teller (BET) method surface analysis. To study the adsorption characteristics, factors such as initial Cu(II) and Pb(II) concentration, pH, contact time, adsorption characteristics and temperature were investigated in batch mode. The maximum adsorption capacity of Cu(II) and Pb(II) was 177.1 mg·g−1 and 176.2 mg·g−1, respectively. The Langmuir adsorption model was employed to better describe the isothermal adsorption behavior and confirm the monolayer adsorption phenomenon. The pseudo-second-order kinetic model was used to highlight Cu(II) and Pb(II) adsorption kinetics. Thermodynamic analysis indicated the removal Cu(II) and Pb(II) by TA-adsorbent was a nonspontaneous and exothermic reaction. The obtained results are of great significance to the conversion of industrial waste to low-cost adsorbent for Cu(II) and Pb(II) removal from water.

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Application of green microalgae biofilms for heavy metals removal from mine effluent

Cited by 22 publications

References 34 publications

Degradation and remediation of environmental pollutants by algae

Degradation and remediation of environmental pollutants by algae

Eukaryotic Community Structure and Interspecific Interactions in a Stratified Acidic Pit Lake Water in Anhui Province

Mild Hydrothermal Synthesis of 11Å-TA from Alumina Extracted Coal Fly Ash and Its Application in Water Adsorption of Heavy Metal Ions (Cu(II) and Pb(II))

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