3D-printed highly porous and reusable chitosan monoliths for Cu(II) removal

Zhang, Dongxing; Xiao, Junfeng; Guo, Qiuquan; Yang, Jun

doi:10.1007/s10853-019-03332-y

Cited by 64 publications

(32 citation statements)

References 59 publications

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“…Functionalized activated carbons and multi-walled carbon nanotubes have also retained attention for the last decades [15,16]. Biosorbents were deeply investigated to substitute synthetic resins with renewable resources [17][18][19][20][21][22][23][24][25]. The binding mechanisms are based on the reactivity of the same functional groups as those found on resins: chelation and ion-exchange mechanisms occur on naturally present reactive groups or on grafted moieties.…”

Section: Introductionmentioning

confidence: 99%

Efficient removal of uranium, cadmium and mercury from aqueous solutions using grafted hydrazide-micro-magnetite chitosan derivative

et al. 2019

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Magnetic chitosan microparticles are functionalized by grafting a new hydra-zide derivative to produce HAHZ-MG-CH, which is applied to the sorption of metal cations. The functionalization (appearance of new groups) and synthesis mechanisms are confirmed using elemental analyses, FTIR and XPS spectrom-etry, TGA and EDX analysis, SEM observation and titration. HAHZ-MG-CH bears high nitrogen content (& 10.9 mmol N g-1). Maximum sorption capacities at pH 5 reach up to 1.55 mmol U g-1 , 1.82 mmol Hg g-1 and 2.67 mmol Cd g-1. Sorption isotherms are preferentially fitted by the Langmuir model. In acidic solutions, the sorbent has a marked preference for Hg(II) over U(VI) and Cd(II), while at mild pH uranyl species are preferentially bound. The sorbent has a lower affinity for Cd(II) in multicomponent solutions. Sorption occurs within 60 min of contact. The pseudo-first-order rate equation fits well kinetic profiles. HCl solutions (0.5 M) successfully desorb all the metal ions (yield exceeds 97% at the first cycle). The sorbent can be recycled for 5 cycles of sorption and desorption: the loss in efficiencies does not exceed 8%. The sorbent removes Hg(II), Cd(II) and Pb(II) from local contaminated groundwater at levels compatible with irrigation and livestock uses but not enough to reach the levels for drinking water regulations.

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Section: Introductionmentioning

confidence: 99%

Efficient removal of uranium, cadmium and mercury from aqueous solutions using grafted hydrazide-micro-magnetite chitosan derivative

et al. 2019

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“…Gradually, more and more publications are appearing in which novel 3D printed packing structures are used and/or characterized for thermal separation technology. [13][14][15] While the majority of publications focus on the areas of rotating packed beds [16][17][18] or absorption and desorption, [19][20][21][22][23] there are hardly any publications specifically for distillation. 24 Within the working group of Thermal Process Engineering at the Ulm University together with the Technical University of Munich and the BASF SE, innovative packing structures are being developed to enable the miniaturization of scalable rectification columns.…”

Section: Introductionmentioning

confidence: 99%

“…Gradually, more and more publications are appearing in which novel 3D printed packing structures are used and/or characterized for thermal separation technology 13–15 . While the majority of publications focus on the areas of rotating packed beds 16–18 or absorption and desorption, 19–23 there are hardly any publications specifically for distillation 24 …”

Section: Introductionmentioning

confidence: 99%

Flexible distillation test rig on a laboratory scale for characterization of additively manufactured packings

et al. 2021

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Additive manufacturing is increasingly being used to develop innovative packings for absorption and desorption columns. Since distillation has not been in focus so far, this article aims to fill this gap. The objective is to obtain a miniaturized three dimensional (3D) printed packed column with optimized properties in terms of scalability and reproducibility, which increases process development efficiency. For this purpose, a flexible laboratory scale test rig is presented combining standard laboratory equipment with 3D printed components such as innovative multifunctional trays or the column wall with packing. The test rig offers a particularly wide operating range F ¼ 0:15Pa 0:5 …1:0Pa 0:5 for column diameters between 2 and 50mm. First results regarding the time to reach steady-state, operational stability, and separation efficiency measurements are presented using a 3D printable version of the Rombopak 9M. Currently, further developed and newly designed packing structures are being characterized, which should exhibit optimized properties especially with respect to scalability and separation efficiency.

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“…Thus, this disruptive technology is successively obtained interest from research community to pursue high‐speed printing process, micro even nanoscale manufacturing, new printable material, and new applications. [ 3–9 ] Currently, a variety of materials, such as polymers, metals, and ceramics, have been used in 3D printing; but the functions of printed objects are generally dominated by limited properties because only confined materials are adopted in 3D printing.…”

Section: Introductionmentioning

confidence: 99%

3D Co‐Printing of 3D Electronics with a Dual Light Source Technology

Xiao

Zhang

Guo

et al. 2021

Adv Materials Technologies

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This study reports a new strategy—3D co‐printing technology by collaboratively employing a dual‐light curing process—to fabricate 3D electronics selectively either deposited on a free‐form surface or embedded within a bulk structure. The 3D co‐printing technology only involves one printing material, which works for both the construction of polymeric structures and the metallization process of conductive circuits resulted from the metal precursor loaded in photosensitive resin. The photoreduction of metal nanoparticles (NPs) can be efficiently activated with a second laser scanning. 3D co‐printing technology addresses the challenge of conventional methods requiring multiple materials deposition processes. The resultant conductive trace composed of NPs exhibits a superior resistivity as low as ≈6.12 µΩ m. The resistivity is further controllable ranging from 10−6 to 10 Ω m through adjusting the material formulation and processing parameters. This study has demonstrated that the proposed 3D co‐printing is a high‐efficiency and low‐cost co‐printing approach which opens a new avenue of making 3D electronics.

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3D-printed highly porous and reusable chitosan monoliths for Cu(II) removal

Cited by 64 publications

References 59 publications

Efficient removal of uranium, cadmium and mercury from aqueous solutions using grafted hydrazide-micro-magnetite chitosan derivative

Efficient removal of uranium, cadmium and mercury from aqueous solutions using grafted hydrazide-micro-magnetite chitosan derivative

Flexible distillation test rig on a laboratory scale for characterization of additively manufactured packings

3D Co‐Printing of 3D Electronics with a Dual Light Source Technology

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