Use of eco-friendly magnetic materials for the removal of polycyclic aromatic hydrocarbons and metals from environmental water samples

Oliveira, Rhayza Victoria Matos; Lima, Jôse Raymara Alves; Cunha, Graziele da Costa; Romão, Luciane Pimenta Cruz

doi:10.1016/j.jece.2020.104050

Cited by 16 publications

(5 citation statements)

References 43 publications

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“…First Magnetic materials include: (i) the classical Fe 3 O 4 , easily formed by the coprecipitation reaction, but also prepared with tunable shapes and behaviors using sol-gel and hydrothermal pathways [24,31]; (ii) MnFe 2 O 3 , which is a good photocatalyst in activating H 2 O 2 or peroxymonosulfate for substrate oxidation [25,35,36,39]; (iii) CoFe 2 O 4 , often employed as an adsorbent [33,41]; (iv) among others, the zero valent iron Fe 0 (ZVI), typically produced by reduction from oxides, which covers a special role due its very high magnetization that makes it suitable in responding very efficiently to applied magnetic fields for a fast separation from aqueous media [1,30].…”

Section: Refmentioning

confidence: 99%

“…However, as mentioned above, the main application of iron-based systems still remains in the field of adsorption. Iron-based nanoparticles, in fact, can be functionalized very easily to tune their removal efficiency towards several contaminants ranging from organic molecules to metals and ions [1,[21][22][23][24][25][26][27][28][29][30][31][32][33][34]40,41].…”

Section: Refmentioning

confidence: 99%

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The “Lab4treat” Outreach Experience: Preparation of Sustainable Magnetic Nanomaterials for Remediation of Model Wastewater

et al. 2021

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The Lab4treat experience has been developed to demonstrate the use of magnetic materials in environmental applications. It was projected in the frame of the European project Mat4Treat, and it was tested several times in front of different audiences ranging from school students to the general public in training and/or divulgation events. The experience lends itself to discuss several aspects of actuality, physics and chemistry, which can be explained by modulating the discussion depth level, in order to meet the interests of younger or more experienced people and expand their knowledge. The topic is relevant, dealing with the recycling of urban waste and water depollution. The paper is placed within the field of water treatment for contaminant removal; therefore, a rich collection of recent (and less recent) papers dealing with magnetic materials and environmental issues is described in the Introduction section. In addition, the paper contains a detailed description of the experiment and a list of the possible topics which can be developed during the activity. The experimental approach makes the comprehension of scientific phenomena effective, and, from this perspective, the paper can be considered to be an example of interactive teaching.

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Section: Refmentioning

confidence: 99%

Section: Refmentioning

confidence: 99%

The “Lab4treat” Outreach Experience: Preparation of Sustainable Magnetic Nanomaterials for Remediation of Model Wastewater

et al. 2021

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“…It should be noted that the BaP removal percentage obtained by unmodified LC was only 1.47%, whereas that by biochar modified with ZnCl 2 (i.e., LZC) was 95.79%. It has been reported that the surface area of biochar directly influences its adsorptive capacity (Oliveira et al, 2020). LZC has the smallest surface area among the modified biochars, but it has the greatest adsorption capacity.…”

Section: Adsorption Of Bapmentioning

confidence: 99%

Performance of sesame straw cellulose, hemicellulose, and lignin biochars as adsorbents in removing benzo(a)pyrene from edible oil

et al. 2022

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The safety problems related to the occurrence of benzo(a)pyrene in edible oil have been a major threat to human health, and now significant attention has been to remove benzo(a)pyrene. So in this work, cellulose, hemicellulose, and lignin biochars were prepared, and then were used to remove benzo(a)pyrene from contaminated oil. Based on the nitrogen adsorption/desorption isotherms and the scanning election micrographs, the modified biochars had a huge specific surface area of 983.50-1915.55 m 2 /g and a well-developed porous structure. The modified biochars showed higher removal rate for benzo(a)pyrene than unmodified biochars. The highest adsorption (95.79%) of benzo(a)pyrene was achieved using the modified lignin biochar, which was therefore selected for evaluation of adsorptive capacity. The ability of the modified lignin biochar to adsorb benzo(a)pyrene was consistent with the pseudo-second order kinetic equation indicating mainly chemisorption, and it fit the Freundlich isotherm (R 2 > 0.999), thereby revealing the occurrence of multilayer adsorption. The effect of π-π conjugation interaction and pore-filling together promoted the high adsorption performance of the modified lignin biochar. This work demonstrates that the modified lignin biochar could be a promising adsorbent for the removal of benzo(a)pyrene from edible oils.

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“…They found that the removal efficiency of such nanoparticles was high, even though they were chemically unstable. To improve the chemical stability (rust) and prevent aggregation, MNPs may coated with a protective layer [35,36]. The protective layer can be organic (self-assembled monolayer and polymer) or inorganic (e.g., silica shell) [37][38][39].…”

Section: Introductionmentioning

confidence: 99%

High-Efficient Anionic Dyes Removal from Water by Cationic Polymer Brush Functionalized Magnetic Mesoporous Silica Nanoparticles

et al. 2022

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High efficiency removal of methyl orange (MO) and bromothymol blue (BT) dyes from contaminated water has been reported using magnetic mesoporous nanoparticles modified with cationic polymer brush (poly(2-methacryloyloxy)ethyl] trimethylammonium chloride solution) (Fe3O4-MSNs-PMETAC). Atom transfer radical polymerization (ATRP) was utilized to grow the polymer chains on the magnetic mesoporous silica nanoparticles. The chemical surface modifications were confirmed using IR, TGA, SEM and TEM. The results show that the obtained Fe3O4-MSNs-PMETAC materials were nearly spherical in shape with approximately 30 nm magnetic core, and silica shell thicknesses ranged from 135 to 250 nm. The adsorption performance of the material was found to be unaffected by the pH (3-9) of the media, with a removal efficiency of 100% for both dyes. The adsorption of BT and MO on the surface of Fe3O4-MSNs-PMETAC was found to follow Freundlich and Langmuir models, respectively. Since the synthesized nanocomposite materials exhibit an enhanced properties such as large maximum adsorption capacity, rapid synthesis process, and easy separation from solution, it could be an effective sorbent for the removal of other pollutants such as potentially toxic anionic elements (e.g., arsenate and chromate ions) from water and wastewater.

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Use of eco-friendly magnetic materials for the removal of polycyclic aromatic hydrocarbons and metals from environmental water samples

Cited by 16 publications

References 43 publications

The “Lab4treat” Outreach Experience: Preparation of Sustainable Magnetic Nanomaterials for Remediation of Model Wastewater

The “Lab4treat” Outreach Experience: Preparation of Sustainable Magnetic Nanomaterials for Remediation of Model Wastewater

Performance of sesame straw cellulose, hemicellulose, and lignin biochars as adsorbents in removing benzo(a)pyrene from edible oil

High-Efficient Anionic Dyes Removal from Water by Cationic Polymer Brush Functionalized Magnetic Mesoporous Silica Nanoparticles

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