Nanomaterial‐Based Methods for Cleaning Contaminated Water in Oil Spill Sites

Kharisov, Boris I.; Dias, H. V. Rasika; Kharissova, Oxana V.; Méndez, Yolanda Peña

doi:10.1002/9783527696109.ch45

Cited by 3 publications

(6 citation statements)

References 52 publications

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“…21 Particularly, understanding the water/solid interface is vital for oil/water filters/membranes. 22,23 This study presents a comprehensive analysis of the Azolla fern (Azolla pinnata) found in lake waters, highlighting its exceptional oil-absorbing properties. A thorough examination of the surface structural intricacies of the fern leaves has unveiled a remarkable hierarchical design featuring microscale and nanoscale structures.…”

Section: Introductionmentioning

confidence: 99%

“…The interaction of water molecules with nano-/or microscale surface topography and functionality is crucial in oil/water separation. − The chemical and physical properties governing the interaction between water and the solid are surface energy, hydrophobicity/or hydrophilicity, and surface charge. − This interaction can impact the behavior of substances dissolved or suspended in water . Particularly, understanding the water/solid interface is vital for oil/water filters/membranes. , …”

Section: Introductionmentioning

confidence: 99%

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Azolla Pinnata: Sustainable Floating Oil Cleaner of Water Bodies

Mohd,

Bhat,

Kakroo

et al. 2024

ACS Omega

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Various plant-based materials effectively absorb oil contaminants at the water/air interface. These materials showcase unparalleled efficiency in purging oil contaminants, encompassing rivers, lakes, and boundless oceans, positioning them as integral components of environmental restoration endeavors. In addition, they are biodegradable, readily available, and eco-friendly, thus making them a preferable choice over traditional oil cleaning materials. This study explores the phenomenal properties of the floating Azolla fern (Azolla pinnata), focusing on its unique hierarchical leaf surface design at both the microscale and nanoscale levels. These intricate structures endow the fern with exceptional characteristics, including superhydrophobicity, high water adhesion, and remarkable oil or organic solvent absorption capabilities. Azolla's leaf surface exhibits a rare combination of dual wettability, where hydrophilic spots on a superhydrophobic base enable the pinning of water droplets, even when positioned upside-down. This extraordinary property, known as the parahydrophobic state, is rare in floating plants, akin to the renowned Salvinia molesta, setting Azolla apart as a natural wonder. Submerged in water, Azolla leaves excel at absorbing light oils at the air−water interface, demonstrating a notable ability to extract high-density organic solvents. Moreover, Azolla's rapid growth, doubling in the area every 4−5 days, especially in flowing waters, positions it as a sustainable alternative to traditional synthetic oil-cleaning materials with long-term environmental repercussions. This scientific lead could pave the way for more environmentally friendly approaches to mitigate the negative impacts of oil spills and promote a cleaner water ecosystem.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Azolla Pinnata: Sustainable Floating Oil Cleaner of Water Bodies

Mohd,

Bhat,

Kakroo

et al. 2024

ACS Omega

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“…Furthermore, one of the key strategies in the efficient green catalysts field is the design and development of new solids for heterogeneous catalytic processes that meet both efficiency and selectivity criteria while permitting recovery, reactivation, and reuse during numerous cycles, without mass losses 4,5,6 . Among the catalysts or heterogeneous supports, magnetic iron oxide (Fe 3 O 4 and γ‐Fe 2 O 3 ) (NPs) have attracted much interest due to their unique attributes, such as superparamagnetic, surface‐to‐volume ratio, greater surface area, shapes, sizes, sustainable nature, inexpensive, nontoxicity, environmentally, and simple separation methodology 2,7–11 . To improve the chemical stability as well as to attain some advantages as the versatility in surface modification, MNPs commonly are coated by different organic or inorganic compounds 7,12 …”

Section: Introductionmentioning

confidence: 99%

γ‐Fe₂O₃@HAp@PBABMD@Cu magnetic nanoparticles: Efficient, green, and recyclable novel nanocatalyst for the synthesis of densely functionalized pyrrole‐pyrido[2,3‐d]pyrimidine hybrids

Saberikhah

Mamaghani

Mahmoodi

2021

J Chinese Chemical Soc

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A green heterogeneous nanocatalyst, Cu(II)-PBABMD complex immobilized on core-shell magnetic γ-Fe 2 O 3 @HAp, was successfully designed, synthesized, and characterized by FTIR, XRD, FESEM, EDX, VSM, TGA, BET, ICP-OES, and TEM techniques. The magnetic Cu(II) nanocatalyst was employed as a novel, ecofriendly, recyclable, and safe catalyst for the one-pot, threecomponent condensation of 6-amino-2-thioxo-2,3-dihydropyrimidin-4(1H)one, 3-(1-methyl-1H-pyrrol-2-yl)-3-oxopropanenitrile and aromatic aldehydes to produce new pyrido [2,3-d]pyrimidine derivatives, in refluxing EtOH with excellent yield (90-97%) and short reaction time (8-13 min). The nanocatalyst was used and recycled in eight runs without significant leaching or loss of its catalytic activity.

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“…132 nZVI can be synthesised through either physical or chemical methods. 133 Physical methods involve ball-milling, condensation or evaporation techniques. In ball-milling, larger particles are ground down to nano-sized particles.…”

Section: Scope Of Nzvimentioning

confidence: 99%

“…Some of the materials that had been tested as protective shells were: silica, 194 polyvinyl alcohol/polyacrylic acid (pVA/pAA) composite, 133 and carbon. 195 Silica coated nZVI had been synthesised for the reduction of Cr 6+ .…”

Section: Core-shell Supportmentioning

confidence: 99%

Methods to Improve nZVI Adsorbance on Silicates Surface for Nitrate Reduction

Fraser¹

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<p>Efforts to remove excess nitrate in the groundwater typically involves expensive ion-exchange membranes or slow reacting bio-reactors. Nano-sized zero valent iron (nZVI) has been used successfully to reduce nitrate into ammonia in various sites in USA and Europe. However, nZVI has a number of major setbacks associated with it, namely the tendency to agglomerate due to magnetic properties, and the possible toxicity due to the nano-sized material. To circumvent these two setbacks, nZVI could be adsorbed onto solid support. In this research, geothermal sediment microsilicate 600 (Misi) was utilised as a support. Initial results suggested that Misi has potential as a support for nZVI, however modifications were required to improve the adsorbance of nZVI onto Misi surface. Calcination, activation, acid wash and iron oxyhydroxide coating were used as surface modifications for Misi. It was found that the two most important modifications for nZVI adsorption was calcination at either 400 or 600 °C and acid washing in 5.6 M HCl. Equipped with this knowledge, other silica and silicates were also used to adsorb nZVI. For pure silica surfaces, 3-APTES and 3-TPTMS ligands and pore enlarging methods of calcination of porogen and salt wash were also used. nZVI was not able to be fully adsorbed on pure silica surfaces. Four other silicates were examined: Rice husk ash, Western Australia silica fume, Mt Piper fly ash, and precipitated aluminium silicate. Of these, only Western Australia silica fume and precipitated aluminium silicate showed potential as nZVI support. Based on the SEM-EDS XRD data of all the silica and silicates, it could be tentatively concluded that nZVI requires an aluminium silicate surface for successful adsorption. Aluminium silicate surfaces typically has an exchangeable cation present, and this cation might play a part in nZVI adsorption. The nZVI/Misi surface was then utilised to reduce nitrate. It was discovered that even though activation and FeOOH did not play a part in nZVI adsorption onto Misi surface, these two steps were important in reduction of nitrate, as the presence of activation and FeOOH increase the reduction of nitrate significantly within 60 minutes. The Misi-supported nZVI were also shown to be more stable in dispersion, and less agglomerated as shown in a sand column experiment.</p>

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Nanomaterial‐Based Methods for Cleaning Contaminated Water in Oil Spill Sites

Cited by 3 publications

References 52 publications

Azolla Pinnata: Sustainable Floating Oil Cleaner of Water Bodies

Azolla Pinnata: Sustainable Floating Oil Cleaner of Water Bodies

γ‐Fe₂O₃@HAp@PBABMD@Cu magnetic nanoparticles: Efficient, green, and recyclable novel nanocatalyst for the synthesis of densely functionalized pyrrole‐pyrido[2,3‐d]pyrimidine hybrids

Methods to Improve nZVI Adsorbance on Silicates Surface for Nitrate Reduction

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Nanomaterial‐Based Methods for Cleaning Contaminated Water in Oil Spill Sites

Cited by 3 publications

References 52 publications

Azolla Pinnata: Sustainable Floating Oil Cleaner of Water Bodies

Azolla Pinnata: Sustainable Floating Oil Cleaner of Water Bodies

γ‐Fe2O3@HAp@PBABMD@Cu magnetic nanoparticles: Efficient, green, and recyclable novel nanocatalyst for the synthesis of densely functionalized pyrrole‐pyrido[2,3‐d]pyrimidine hybrids

Methods to Improve nZVI Adsorbance on Silicates Surface for Nitrate Reduction

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Product

Resources

About

γ‐Fe₂O₃@HAp@PBABMD@Cu magnetic nanoparticles: Efficient, green, and recyclable novel nanocatalyst for the synthesis of densely functionalized pyrrole‐pyrido[2,3‐d]pyrimidine hybrids