Electrospun cellulose acetate nanofiber incorporated with hydroxyapatite for removal of heavy metals

Hamad, A Al-Lohedan; Hassouna, Mohammed Salah El-Din; Shalaby, Thanaa I.; Elkady, M. F.; Elkawi, Mervat A. Abd; Hamad, Hesham

doi:10.1016/j.ijbiomac.2019.10.176

Cited by 123 publications

(42 citation statements)

References 54 publications

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“…The inorganic nanoparticles possessing ion-exchange properties are attractive to be used for heavy metal removal and the NF carriers can circumvent aggregation and increase their active sites. There have been reports on the incorporation of metal oxide nanoparticles [ 101 , 102 , 103 , 104 ], zeolite nanoparticles [ 105 ], and hydroxyapatite nanoparticles (Hap NP) [ 106 ] in polymer NF membranes by electrospinning for heavy metal adsorption. For example, Tran et al incorporated zeolite nanoparticles into electrospun cellulose acetate fibers to create free-standing IEX-NF membranes [ 107 ].…”

Section: Applications Of Nanofiber-based Iemsmentioning

confidence: 99%

De Novo Ion-Exchange Membranes Based on Nanofibers

2021

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The unique functions of nanofibers (NFs) are based on their nanoscale cross-section, high specific surface area, and high molecular orientation, and/or their confined polymer chains inside the fibers. The introduction of ion-exchange (IEX) groups on the surface and/or inside the NFs provides de novo ion-exchangers. In particular, the combination of large surface areas and ionizable groups in the IEX-NFs improves their performance through indices such as extremely rapid ion-exchange kinetics and high ion-exchange capacities. In reality, the membranes based on ion-exchange NFs exhibit superior properties such as high catalytic efficiency, high ion-exchange and adsorption capacities, and high ionic conductivities. The present review highlights the fundamental aspects of IEX-NFs (i.e., their unique size-dependent properties), scalable production methods, and the recent advancements in their applications in catalysis, separation/adsorption processes, and fuel cells, as well as the future perspectives and endeavors of NF-based IEMs.

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Section: Applications Of Nanofiber-based Iemsmentioning

confidence: 99%

De Novo Ion-Exchange Membranes Based on Nanofibers

2021

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“…The retention of these heavy metals by electro-spun membranes is mainly attributed to exclusion by pore size, since these metals were probably in colloidal form. Another reason for the retention could be explained by the interactions between the functional sites of the PCL and CNF electro-spun membrane surface with the heavy metal ions [36,37]. Hydrogen bonding played an important role in the adsorption process for the specific bonding that originates on the bonding sites of the composites, and, for that reason, the cellulose nanofibers were the active material in the composite because their surfaces possess different functional groups.…”

Section: Filtration Performance Of the Pcl:cnf Composite Electro-spunmentioning

confidence: 99%

“…The electro-spun membranes of pure PCL presented a greater elongation break value (0.36 mm/mm). The decrease in elongation at the point of rupture that was observed in the mixtures of PCL: NFC at 80:20 and 60:40 can be attributed to a low interaction between PCL and NFC, which is usually indicative of the immiscibility between components in the mixture when the pure polymer is used [36]. However, PCL/CNF (50:50) composite membrane showed the highest elastic modulus and tensile strength (0.58 mm/mm) of the three membrane systems that were fabricated.…”

Section: Introductionmentioning

confidence: 97%

Nanocellulose and Polycaprolactone Nanospun Composite Membranes and Their Potential for the Removal of Pollutants from Water

et al. 2020

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A composite membrane based on polycaprolactone (PCL) and cellulose nanofibers (CNF) with different compositions was prepared using the electro-spinning method, with the objective of developing organic membranes with good mechanical properties to remove contaminants from water. Water is a resource of primary importance for life and human activities. In this sense, cellulose obtained from agave bagasse and polycaprolactone nanofibers was used to prepare membranes that were tested by filtering tap water. The membranes obtained presented a porosity and structure on a nanometric scale. The water quality variables evaluated after filtration with the PCL/CNF membranes showed 100% turbidity removal, 100% conductivity, and heavy metal removal of the order of 75% to 99% for iron and chromium. CNF comprises biowaste derived from tequila production, and it has added value. Electro-spun CNF and PCL membranes can be applied as a "green" and eco-friendly filtration system for water purification.Molecules 2020, 25, 683 2 of 13 about 40% (wet basis) of over 1000 tons of agave grown in Mexico [11]. The availability of such large quantities of agave bagasse [9] poses serious disposal problems, since most of the biomass ends up in clandestine dumps (due to little environmental regulation), causing adverse effects on the fertility of farmland [12], contamination by leachates, and phytosanitary risks due to the inadequate incorporation of this material into the soil [13]. Chemically, agave bagasse is 44.5% cellulose, 25.3% hemicellulose, and 20.1% lignin [7]. Taking advantage of these constituents, there have been many efforts to use agave bagasse for various applications, e.g., the production of biopolymers [14,15], composting [16], animal nutrition [17], generation of biofuels [10,18], reinforcement materials [19], etc. More recently, agave bagasse is being explored for the production of cellulose nanofibers and nanocrystals [7,8,20,21] to further diversify the utilization of this biowaste. On the other hand, electro-spinning of biopolymers has become popular in the manufacture of nanofibers for a variety of added value applications, such as tissue engineering, drug release, sensors, and air and liquid filtration systems [22][23][24][25][26].Our main interest in electro-spinning agave cellulose nanofibers was to produce membranes that can retain suspended particles in water (due to the diameter of the fibers), a membrane with high porosity and good surface area properties. However, the main challenge with the preparation of electro-spun agave cellulose was the poor solubility of cellulose that was to be dispersed into an electro-spinnable liquid [24]. We overcame the poor solubility challenge by dissolving agave cellulose in dimethylformamide (DMF) and blending with polycaprolactone to prepare a composite electro-spun blend, subsequently producing electro-spun nanocellulose and polycaprolactone membranes. The main objective of using a copolymer blend was to improve technical properties, such as contaminant retention capacity, therma...

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“…The main features of these polymers are their hydrophobicity and lack of functional groups. To use these polymers in the adsorption treatment process, they should first be functionalized by chemical modification such as grafting and chemical oxidation or incorporation of functional materials such as functional nanoparticles, metal organic framework, inorganic, organic or microbial functional materials [6,[28][29][30][31]. Polymer composite composed of polymer matrix and nanoparticles or submicron particles displayed the advantage of both materials and can be used in different application fields [32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Highly efficient adsorptive membrane for heavy metal removal based on Ulva fasciata biomass

Abdelhamid

Labena

Mansor

et al. 2021

Biomass Conv. Bioref.

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New composite adsorptive membranes were prepared from non-living Ulva fasciata (U), marine algae and cellulose acetate (CA) as polymer matrix to develop CA-U composite membranes with different ratios using the phase inversion technique. These CA-U membranes were used for cadmium (Cd 2+ ) and zinc (Zn 2+ ) ion removal from aqueous media. The prepared membranes were characterized via different instrumental techniques as ATR-FTIR, SEM and EDX in addition to swelling and porosity measurements. Afterwards, they were optimized for Cd 2+ and Zn 2+ removal through one factor at a time (OFAT) trials followed by full factorial design. The morphology and porosity measurements were highly affected by the addition of Ulva fasciata biosorbent and showed a large increase of the size and density of pores of the CA-U membrane. Maximum adsorption capacities (q max ) of 95.2 and 91.7 mg/g were obtained for Cd 2+ and Zn 2+ ions, respectively. Results established that all isotherm models attained R 2 more than 0.9, where the Langmuir isotherm achieved the highest one with R 2 0.9993 for Cd 2+ and 0.9965 for Zn 2+ , and the adsorption process belongs to the pseudo-1st-order kinetic model. The CA-U membrane displayed a higher affinity for Cd 2+ and Zn 2+ ion removal by three to four times than the blank CA membrane. Furthermore, 3R processes (removal, recovery and re-use) were applied and indicated the suitability of this system in heavy metal removal with high efficiency.

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Electrospun cellulose acetate nanofiber incorporated with hydroxyapatite for removal of heavy metals

Cited by 123 publications

References 54 publications

De Novo Ion-Exchange Membranes Based on Nanofibers

De Novo Ion-Exchange Membranes Based on Nanofibers

Nanocellulose and Polycaprolactone Nanospun Composite Membranes and Their Potential for the Removal of Pollutants from Water

Highly efficient adsorptive membrane for heavy metal removal based on Ulva fasciata biomass

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