Adsorption of Cu (II), Pb (II) and Cr (VI) from aqueous solutions using black wattle tannin-immobilized nanocellulose

Xu, Qingyu; Wang, Yulu; Jin, Liqiang; Wang, Yu; Qin, Menghua

doi:10.1016/j.jhazmat.2017.06.005

Cited by 230 publications

(70 citation statements)

References 43 publications

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“…Immobilization of tannin, or specific hydrolysable tannin compounds such as tannic acid, onto material surfaces has also been achieved using for instance mesoporous silicate 20 , silica microspheres 21 , collagen 22 , graphene 23 and activated carbon 24 . As reported by Xu et al (2017), dialdehyde nanocellulose can be used to covalently 26 immobilize tannin molecules. In case of wood as matrix, carbohydrates with inherently good 27 adhesion with wood can be exploited 25 .…”

Section: Introductionmentioning

confidence: 99%

Multifunctional comparison of different management strategies in boreal forests

Díaz-Yáñez

Pukkala

Packalén

et al. 2019

Forestry: An International Journal of Forest Research

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In sustainable forestry, forests should produce multiple ecosystem services for society, such as timber, carbon sequestration and biodiversity. Therefore, in the evaluation of forest management strategies, we have to consider the impacts of management on several ecosystem services. In this study, we compared the effects of five different forest management strategies on timber drain, carbon stocks, carbon balance and biodiversity indicators, while maximizing economic revenues from timber production. The assessment was carried out in a boreal landscape of 43 000 ha over a 100-year calculation period. The five management strategies were rotation forest management (with thinning from below or above), continuous cover forestry, a combination of rotation forest management and continuous cover forestry and any-aged forestry. Rotation forest management with thinning from below was less profitable than the other strategies, which were close to each other in economic profitability. Rotation forest management with thinning from below was also the poorest in terms of carbon stocks, carbon balance and biodiversity indicators. Any-aged and continuous cover forestry were the best in terms of carbon sequestration and biodiversity indicators. In general, management strategies that used thinning from above and that were not restricted to rotation forest management as the only option provided more ecosystem services and were also economically profitable. Such management strategies may help to satisfy the increasing demand for diverse uses of forests.

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Section: Introductionmentioning

confidence: 99%

Multifunctional comparison of different management strategies in boreal forests

Díaz-Yáñez

Pukkala

Packalén

et al. 2019

Forestry: An International Journal of Forest Research

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“…However, nanocellulose must be modified to achieve excellent adsorption capacity. The aerogels prepared in this work have shown better adsorption capacity than the nanocellulose-based adsorbents in many literatures [45][46][47]. Considering the excellent recyclability of CNC-g-P(AA/AM) aerogels, they are more competitive for practical use than many other nanocellulose-based adsorbents.…”

Section: Reusabilitymentioning

confidence: 88%

Fabrication of Cellulose Nanocrystal-g-Poly(Acrylic Acid-Co-Acrylamide) Aerogels for Efficient Pb(II) Removal

Chen

et al. 2020

Polymers

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In this work, cellulose nanocrystals (CNCs) obtained by the acid hydrolysis of waste bamboo powder were used to synthesize cellulose nanocrystal-g-poly(acrylic acid-co-acrylamide) (CNC-g-P(AA/AM)) aerogels via graft copolymerization followed by freeze-drying. The structure and morphology of the resulting aerogels were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM), and the CNC-g-P(AA/AM) aerogels exhibited excellent absorbent properties and adsorption capacities. Subsequent Pb(II) adsorption studies showed that the kinetic data followed the pseudo-second-order equation, while the adsorption isotherms were best described using the Langmuir model. The maximum Pb(II) adsorption capacity calculated by the Langmuir model reached up to 366.3 mg/g, which is a capacity that outperformed that of the pure CNC aerogel. The CNC-g-P (AA/AM) aerogels become structurally stable through chemical cross-linking, which enabled them to be easily regenerated in HCl solution and retain the adsorption capacity after repeated use. The aerogels were found to maintain 81.3% removal efficiency after five consecutive adsorption–desorption cycles. Therefore, this study demonstrated an effective method for the fabrication of an aerogel adsorbent with an excellent reusability in the effective removal of Pb(II) from aqueous solutions.

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“…A comparison of the adsorption capacity of PAN-TA-3 NFs to some other tannin-based adsorbers is presented in Table 3 [1,46,[48][49][50]. It can be seen that PAN-TA-3 nanofiber adsorbent has a relatively high adsorption capacity for Cr(III) compared to other tannin-based adsorbents, while lower than tannin-based adsorbents for Cr(VI).…”

Section: Adsorption Cyclesmentioning

confidence: 98%

Fabrication of PAN Electrospun Nanofibers Modified by Tannin for Effective Removal of Trace Cr(III) in Organic Complex from Wastewater

Zhang

Xue

et al. 2020

Polymers

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Removal of chromium ions is significant due to their toxicity and harmfulness, however it is very difficult to remove trace Cr(III) complexed with organics because of their strong stability. Herein, a novel electrospun polyacrylonitrile (PAN) nanofibers (NF) adsorbent was fabricated and modified by tannic acid (TA) by a facile blend electrospinning approach for removal of trace Cr(III) in an organic complex. Utilizing the large specific area of nanofibers in the membrane and the good affinity of tannic acid on the nanofibers for hydrolyzed collagen by hydrophobic and hydrogen bonds, the as-prepared PAN–TA NFM exhibited good adsorption toward Cr(III)-collagen complexes and effective reduction of total organic carbon in tannage wastewater. The maximal adsorption capacity of Cr(III) is 79.48 mg g−1 which was obtained at the pH of 7.0 and initial Cr(III) concentration of 50 mg g−1. Importantly, the batch adsorption could decrease the Cr(III) concentration from 10–20 mg L−1 to under 1.5 mg L−1, which showed great application potential for the disposal of trace metal ions in organic complexes from wastewater.

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Adsorption of Cu (II), Pb (II) and Cr (VI) from aqueous solutions using black wattle tannin-immobilized nanocellulose

Cited by 230 publications

References 43 publications

Multifunctional comparison of different management strategies in boreal forests

Multifunctional comparison of different management strategies in boreal forests

Fabrication of Cellulose Nanocrystal-g-Poly(Acrylic Acid-Co-Acrylamide) Aerogels for Efficient Pb(II) Removal

Fabrication of PAN Electrospun Nanofibers Modified by Tannin for Effective Removal of Trace Cr(III) in Organic Complex from Wastewater

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