Magnetic nanocomposites for environmental remediation

Zhu, Jiahua; Wei, Suying; Chen, Minjiao; Gu, Hongbo; Rapole, Sowjanya B.; Pallavkar, Sameer; Ho, Thomas C.; Hopper, J.R.; Guo, Zhanhu

doi:10.1016/j.apt.2012.10.012

Cited by 155 publications

(78 citation statements)

References 93 publications

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“…The 20 % PANI loading removed 2 mg/L of Cr 6+ completely within 5 min (Qiu et al 2014a, b, c). Zhu et al (2013) reviewed about the effective removal of heavy metals (Cr, As, Pd, Hg) using magnetic nanocomposites. Magnetic nanocomposites show great potential not only because they obtain high adsorption capacity but also the convenient recycling using permanent magnet (Zhu et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Immobilization of Chromium in Tannery Sludge Using Iron-Based Nanoparticles and Nanobiocomposites

Arthy

Phanikumar

2015

Water Air Soil Pollut

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This paper presents the efficacy of zerovalent iron nanoparticles (ZVINs), magnetic iron oxide nanoparticles (MINs), zero-valent iron nanoparticles/ sugarcane bagasse (ZVIN-SB) composite and magnetic iron oxide nanoparticles/sugarcane bagasse (MIN-SB) composite in immobilizing chromium present in tannery sludge. The optimized values for the immobilization of chromium by the adsorbents were found to be 48 h, 100 g/kg and 7, respectively, for time, adsorbent dosage and pH. The maximum uptake capacity was found to be 429.75, 539.25, 587.25 and 625.8 mg/kg, respectively, for ZVIN, MIN, ZVIN-SB and MIN-SB. The desorption study of the unamended sludge and sludge amended by ZVIN, MIN, ZVIN-SB and MIN-SB was carried out with three different desorbing media (0.1 N HCL, DIW and 0.1 N NaOH). It was found that the cumulative concentration of leachate chromium was more in basic condition than in neutral and acidic conditions. In column studies, the concentration of leachate chromium attained 0 mg/L at 24, 15, 18 and 14 pore volumes, respectively, for the sludge amended by ZVIN, MIN, ZVIN-SB and MIN-SB. The experimental adsorption data fitted well with pseudo-first-order kinetics. The zero-order kinetics accurately predicted the experimental desorption capacity (q e ) of the sludge amended by ZVIN, MIN, ZVIN-SB and MIN-SB. The Fourier transform infrared spectroscopy (FTIR) analysis showed that the amine, carboxyl, iron compounds, etc. present in the adsorbents were the chief causes for the immobilization of chromium. The X-ray diffraction (XRD) analysis of the sludge showed the presence of trivalent chromium compounds at a higher concentration. Nomenclature q t Amount of contaminant adsorbed/desorbed from sludge at time (min) (mg/kg) C 0 Initial concentration of the chromium (mg/L) C e Final concentration of the chromium (mg/L) V Volume of the solution (L) M Mass of the adsorbent (kg) C t (mg/ L) Concentration of the contaminant in the liquid at varying contact time W Weight of the sludge (kg) R 2Correlation coefficient q e Experimental uptake capacity/desorption capacity (mg/kg) Water Air Soil Pollut (2015) 226: 204 Calculated uptake capacity/desorption capacity (mg/kg) k 1 First-order kinetic rate constant (1/min) h Initial adsorption rate (mg/kg/min) t 1/2 Half-life time (min) k 2 Rate constant of pseudo-second-order equation (kg/mg/min) α Elovich kinetic constant initial adsorption rate (mg/kg/min) β Elovich kinetic desorption constant (kg/mg) k Rate constant of the power function (mg/kg/ min) kv Power kinetic specific adsorption rate at unit time (mg/kg/min) k 0 Zero-order rate constant (mg/kg/min) k p Parabolic diffusion rate constant (kg/g/ min 0.5 )

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Section: Introductionmentioning

confidence: 99%

Immobilization of Chromium in Tannery Sludge Using Iron-Based Nanoparticles and Nanobiocomposites

Arthy

Phanikumar

2015

Water Air Soil Pollut

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“…The chosen thermoplastic resin, a commercial poly(lactic acid) with the trade name of Natureworks Ingeo Biopolymer 3251D, density of 1.24 g/cm 3 and melt flow index of 30 -40 g/10 min (190 °C/2.16 kg), was obtained from Unic Technology Ltd, China. SMR-L grade natural rubber (NR) which supplied by Malaysian Rubber Board (MRB) was used to synthesize the liquid natural rubber (LNR) via photosensitized chemical oxidation technique.…”

Section: Raw Materialsmentioning

confidence: 99%

“…The combination of organic and inorganic materials in magnetic polymer nanocomposites (MPNCs) has produced new properties that could not be obtained by single organic or inorganic material. The applications for MPNCs can be extended from the fields related to the environment [3,4] until medical field [5]. For instances, technological fields have recently getting more and more attention in the market, especially, in the microwave, electronics and telecommunication industries such as microsensors, magnetic refrigeration, microelectromechanical system, controlling drug delivery and etc.…”

Section: Introductionmentioning

confidence: 99%

“…Magnetic polymer nanocomposites (MPNCs) are known as materials consisted of an inorganic magnetic component with at least one dimension in the nanometer scale whether in the form of fibers, particles, or lamellae that embedded in an organic polymer [3]. By combining the polymeric matrix materials that are non-magnetic properties with the magnetic nanoparticles as fillers, a new composite material that possesses magnetic properties can be produced and its applications and usefulness can be further expanded.…”

Section: Introductionmentioning

confidence: 99%

“…For instances, technological fields have recently getting more and more attention in the market, especially, in the microwave, electronics and telecommunication industries such as microsensors, magnetic refrigeration, microelectromechanical system, controlling drug delivery and etc. [3,6].…”

Section: Introductionmentioning

confidence: 99%

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Tensile and Thermal Behaviours of Poly(lactic Acid)/Liquid Natural Rubber Blend Matrix Incorporated Nickel Zinc Ferrite Nanoparticles

Chen

Shahdan

Ahmad³

2017

MJAS

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Magnetic polymer nanocomposites (MPNCs) based on poly(lactic acid)/liquid natural rubber (PLA/LNR) (90:10) blend and nickel zinc (NiZn) ferrite magnetic nanoparticles were fabricated via melt-blending technique. The effect of NiZn ferrite nanofiller concentration (1 -5 wt.%) on the tensile and thermal properties of PLA/LNR/NiZn ferrite nanocomposites was investigated. Tensile tests showed that as the tensile strength and modulus increased with the increase of nanofiller concentration until the optimum values of nanofiller concentration was achieved. The thermal behaviour of MPNCs including degradation temperature and its shiftment as well as the remaining residues after complete degradation were determined by thermogravimetric analysis (TGA) measurement. As the NiZn ferrite nanofiller concentration increased, it was noted that the T end of nanocomposites at low amount of nanofillers (1 -2 wt.%) was higher than neat PLA/LNR and nanocomposites containing high concentration of nanofillers. The current work proves that NiZn ferrite could be served as an excellent reinforcement filer in PLA/LNR matrix. The improved tensile properties and thermal stability of PLA/LNR composites achieved at 2 -3 wt.% NiZn due to the good dispersion of NiZn ferrite within the PLA/LNR matrix and strong filler-matrix interfacial adhesion, as can be confirmed by the scanning electron microscope (SEM).Keywords: biopolymer, polymer blend, nanocomposite, magnetic particles, melt blending Abstrak Nanokomposit polimer magnetik (MPNC) berasaskan adunan asid polilaktik/cecair getah asli (PLA/LNR) (90:10) dan nanozarah magnetik nikel zink ferit (NiZn) dihasilkan melalui teknik pengadunan leburan. Kesan kandungan NiZn ferit (1-5 %bt) terhadap sifat regangan dan terma nanokomposit PLA/LNR/NiZn telah dikaji. Ujian regangan menunjukkan bahawa peningkatan kekuatan dan modulus regangan dengan peningkatan kandungan pengisi nano sehingga nilai optimum tercapai. Tingkah laku terma bagi MPNCs termasuk suhu degradasi (T end ) dan anjakannya serta baki sisa selepas degradasi lengkap telah ditentukan melalui analisis termogravimetri (TGA). Apabila kandungan NiZn ferit pengisi nano meningkat, didapati T end bagi nanokomposit berpengisi nano dalam kandungan kecil (1 -2 %bt) adalah lebih tinggi daripada PLA/LNR dan nanokomposit terkandung pengisi yang banyak. Hasil kajian ini membuktikan bahawa NiZn ferit boleh bertindak sebagai pengisi pengukuhan yang baik dalam matriks PLA/LNR. Penambahbaikan sifat regangan dan kestabilan terma komposit PLA/LNR tercapai pada 2 -3 %bt NiZn disebabkan penyebaran NiZn ferit yang baik dalam matriks PLA/LNR dan lekatan antaramuka pengisi-matriks yang kuat, seperti yang disahkan oleh mikroskop elektron imbasan (SEM).

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Nanocomposites in Environmental Engineering

Lone

Wani

2019

Composites for Environmental Engineering

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Magnetic nanocomposites for environmental remediation

Cited by 155 publications

References 93 publications

Immobilization of Chromium in Tannery Sludge Using Iron-Based Nanoparticles and Nanobiocomposites

Immobilization of Chromium in Tannery Sludge Using Iron-Based Nanoparticles and Nanobiocomposites

Tensile and Thermal Behaviours of Poly(lactic Acid)/Liquid Natural Rubber Blend Matrix Incorporated Nickel Zinc Ferrite Nanoparticles

Nanocomposites in Environmental Engineering

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