Breve revisión del uso de microalgas para la remoción de contaminantes emergentes en aguas residuales

Herrera, Juan Andrés Sandoval; Granados, Miguel Alfonso Morales; Rubio, Diego Iván Caviedes

doi:10.15446/ga.v23n1.84034

Cited by 4 publications

(5 citation statements)

References 60 publications

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“…Even when usually detected at low concentrations, from µgL −1 to ngL −1 and rarely in mgL −1 , EPs are capable of causing adverse effects in organisms [9]. Their effects range from alterations in the immune system of aquatic animals to mutations and cancer in humans [4,8]. Perfluorinated compounds, personal care products, engineered nanomaterials, antibiotics, and resistance genes are considered as endocrine disruptors [7].…”

Section: Introductionmentioning

confidence: 99%

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Nanoparticles of the Perovskite-Structure CaTiO3 System: The Synthesis, Characterization, and Evaluation of Its Photocatalytic Capacity to Degrade Emerging Pollutants

Cerón-Urbano,

Aguilar,

Diosa

et al. 2023

Nanomaterials

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In this research work, the photocatalytic capacity shown by the nanoparticles of the CaTiO3 system was evaluated to degrade two pollutants of emerging concern, namely methyl orange (MO)—considered an organic contaminating substance of the textile industry that is non-biodegradable when dissolved in water—and levofloxacin (LVF), an antibiotic widely used in the treatment of infectious diseases that is released mostly to the environment in its original chemical form. The synthesis process used to obtain these powders was the polymeric precursor method (Pechini), at a temperature of 700 °C for 6 h. The characterization of the obtained oxide nanoparticles of interest revealed the presence of a majority perovskite-type phase with an orthorhombic Pbnm structure and a minority rutile-type TiO2 phase, with a P42/mnm structure and a primary particle size <100nm. The adsorption–desorption isotherms of the synthesized solids had H3-type hysteresis loops, characteristic of mesoporous solids, with a BET surface area of 10.01m2/g. The Raman and FTIR spectroscopy results made it possible to identify the characteristic vibrations of the synthesized system and the characteristic deformations of the perovskite structure, reiterating the results obtained from the XRD analysis. Furthermore, a bandgap energy of ~3.4eV and characteristic emissions in the violet (437 nm/2.8 eV) and orange (611 nm/2.03 eV) were determined for excitation lengths of 250 nm and 325 nm, respectively, showing that these systems have a strong emission in the visible light region and allowing their use in photocatalytic activity to be potentialized. The powders obtained were studied for their photocatalytic capacity to degrade methyl orange (MO) and levofloxacin (LVF), dissolved in water. To quantify the coloring concentration, UV–visible spectroscopy was used considering the variation in the intensity of the characteristic of the greatest absorption, which correlated with the change in the concentration of the contaminant in the solution. The results showed that after irradiation with ultraviolet light, the degradation of the contaminants MO and LVF was 79.4% and 98.1% with concentrations of 5 g/L and 10 g/L, respectively.

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Section: Introductionmentioning

confidence: 99%

“…The presence of EPs is increasing day by day due to the inability of conventional treatments to remove them. In addition, they can accumulate in the trophic chain and migrate to groundwater sources, or be deposited in sediments [4]. Normal organic matter can be degraded easily through water purification.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticles of the Perovskite-Structure CaTiO3 System: The Synthesis, Characterization, and Evaluation of Its Photocatalytic Capacity to Degrade Emerging Pollutants

Cerón-Urbano,

Aguilar,

Diosa

et al. 2023

Nanomaterials

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“…EC are compounds of different origin and chemical nature that are not commonly monitored because their presence in the environment and the damage they can cause are little studied and unnoticed [6]. In other words, there is little information about them, which further intensifies the problem.…”

Section: Introductionmentioning

confidence: 99%

Removal of METH through Tertiary or Advanced Treatment in a WWTP

Ponce-Arguello

Abad-Sarango

Crisanto-Perrazo

et al. 2022

Water

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METHs are drugs that enter wastewater through the feces and urine of users. Conventional wastewater treatment plants are not capable of removing this type of emerging contaminant, but, in recent years, techniques have been developed to abate drugs of abuse. The present investigation focused on obtaining the technique that keeps the best balance between the comparison criteria considered: efficiency; costs; development stage; and waste generation. That is why a bibliographic review was carried out in the scientific databases of the last eight years, concluding that the six most popular techniques are: SBR, Fenton reaction, mixed-flow bioreactor, ozonation, photocatalysis, and UV disinfection. Subsequently, the Saaty and Modified Saaty methods were applied, obtaining a polynomial equation containing the four comparison criteria for the evaluation of the techniques. It is concluded that the UV disinfection method is the one with the best relationship between the analyzed criteria, reaching a score of 0.8591/1, followed by the Fenton method with a score of 0.6925/1. This research work constitutes a practical and easy-to-use tool for decision-makers, since it allows finding an optimal treatment for the abatement of METHs.

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“…Recientes publicaciones, mencionan como una alternativa para remoción de contaminantes emergentes a los tratamientos con microalgas, como Chlorella vulgaris y Scenedesmus sp. cuyos principales mecanismos de remoción de contaminantes son: bioadsorción y biodegradación (Sandoval et al, 2020). La ozonización de efluentes industriales farmacéuticos ha mostrado gran eficiencia en la remoción de compuestos farmacéuticos, tales como los antibióticos, antiinflamatorios y estrógenos (Urbina y Solano, 2020).…”

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Removal of ibuprofen and amoxicillin in domestic wastewater using activated carbon soaps and moringa seed powder at the laboratory level

Paredes,

Evangelista

2024

rev.cyt

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This research was done to determine the effect of using soaps with activated carbon and moringa seed powder on the concentration of ibuprofen and amoxicillin in domestic wastewater. The soaps were prepared with transparent commercial glycerin, adding the adsorbents at a rate of 0.1 g/g of soap. The residual water was prepared in the laboratory and characterized, then ibuprofen and amoxicillin were added at a concentration of 3 mg/L each. In the experiments, the soaps were added individually and combined to 1 liter of residual water, in three weight percentages: 5%, 15% and 25%. The combined application of soap with activated charcoal and 25% moringa seed powder was the best treatment with removal of 81.33% and 80% of ibuprofen and amoxicillin, respectively. This treatment was applied to actual domestic wastewater from the wastewater outlet to the Huallaga River in Tingo María-Huánuco-Perú, which was characterized and 72.3% and 69.7% of ibuprofen and amoxicillin were removed, respectively. Through a Tukey test, it was verified that there is a significant difference with a confidence interval of 95%, between the treatments applied in a real residual water and an artificial one.

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Breve revisión del uso de microalgas para la remoción de contaminantes emergentes en aguas residuales

Cited by 4 publications

References 60 publications

Nanoparticles of the Perovskite-Structure CaTiO3 System: The Synthesis, Characterization, and Evaluation of Its Photocatalytic Capacity to Degrade Emerging Pollutants

Nanoparticles of the Perovskite-Structure CaTiO3 System: The Synthesis, Characterization, and Evaluation of Its Photocatalytic Capacity to Degrade Emerging Pollutants

Removal of METH through Tertiary or Advanced Treatment in a WWTP

Removal of ibuprofen and amoxicillin in domestic wastewater using activated carbon soaps and moringa seed powder at the laboratory level

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