Multifunctional self-assembling hydrogel from guar gum

Dai, Lei; Zhang, Liqiang; Wang, Baobin; Yang, Bo; Khan, I. B.; Khan, Avik; Ni, Yonghao

doi:10.1016/j.cej.2017.08.041

Cited by 78 publications

(25 citation statements)

References 51 publications

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“…Chitosan has shown a high affinity for the sorption of metal ions through chelation of metal cations in near-neutral solutions and electrostatic attraction/ion exchange mechanisms in acidic solutions for the binding of metal anions [44][45][46][47][48]. Guar gum has also retained a great attention in the last decades for synthesizing metal-binding composite hydrogels [49][50][51][52][53][54].…”

Section: Introductionmentioning

confidence: 99%

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

et al. 2021

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The development of new materials is needed to address the environmental challenges of wastewater treatment. The phosphorylation of guar gum combined with its association to chitosan allows preparing an efficient sorbent for the removal of U(VI) from slightly acidic solutions. The incorporation of magnetite nanoparticles enhances solid/liquid. Functional groups are characterized by FTIR spectroscopy while textural properties are qualified by N2 adsorption. The optimum pH is close to 4 (deprotonation of amine and phosphonate groups). Uptake kinetics are fast (60 min of contact), fitted by a pseudo-first order rate equation. Maximum sorption capacities are close to 1.28 and 1.16 mmol U g−1 (non-magnetic and magnetic, respectively), while the sorption isotherms are fitted by Langmuir equation. Uranyl desorption (using 0.2 M HCl solutions) is achieved within 20–30 min; the sorbents can be recycled for at least five cycles (5–6% loss in sorption performance, complete desorption). In multi-component solutions, the sorbents show marked preference for U(VI) and Nd(III) over alkali-earth metals and Si(IV). The zone of exclusion method shows that magnetic sorbent has antibacterial effects against both Gram+ and Gram- bacteria, contrary to non-magnetic material (only Gram+ bacteria). The magnetic composite is highly promising as antimicrobial support and for recovery of valuable metals.

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Section: Introductionmentioning

confidence: 99%

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

et al. 2021

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“…Additionally, the peaks at 1090 cm −1 were assigned to C–OH bending vibrations [ 32 , 33 ]. In case of original fracturing fluid, the broad band around 3400 cm −1 was attributed to O–H stretching vibration [ 34 , 35 ]. The absorption peaks at 1680 cm −1 and 1550 cm −1 were assigned to the stretching vibration of C = O and–COO–, respectively.…”

Section: Resultsmentioning

confidence: 99%

Design of facile technology for the efficient removal of hydroxypropyl guar gum from fracturing fluid

Cui

Chen

et al. 2021

PLoS ONE

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With the increasing demand for energy, fracturing technology is widely used in oilfield operations over the last decades. Typically, fracturing fluids contain various additives such as cross linkers, thickeners and proppants, and so forth, which makes it possess the properties of considerably complicated components and difficult processing procedure. There are still some difficult points needing to be explored and resolved in the hydroxypropyl guar gum (HPG) removal process, e.g., high viscosity and removal of macromolecular organic compounds. Our works provided a facile and economical HPG removal technology for fracturing fluids by designing a series of processes including gel-breaking, coagulation and precipitation according to the diffusion double layer theory. After this treatment process, the fracturing fluid can meet the requirements of reinjection, and the whole process was environment friendly without secondary pollution characteristics. In this work, the fracturing fluid were characterized by scanning electron microscopy (SEM), Energy dispersive X-ray (EDX), X-ray diffraction (XRD) and Fourier transformed infrared (FTIR) spectroscopy technologies, etc. Further, the micro-stabilization and destabilization mechanisms of HPG in fracturing fluid were carefully investigated. This study maybe opens up new perspective for HPG removal technologies, exhibiting a low cost and strong applicability in both fundamental research and practical applications.

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“…[ 38,49 ] Therefore, the utilization of these renewable resources in developing materials for oil/water separation is extremely important. Some typical examples of functionalized hydrogel materials sourced from cellulose, [ 50 ] chitosan, [ 51 ] and guar gum, [ 52 ] etc. perfectly meet the requirements of “green” and sustainable development, which are summarized in Table 2 .…”

Section: Superwettable Hydrogel Materials For Oil/water Separationmentioning

confidence: 99%

Hydrogel as a Superwetting Surface Design Material for Oil/Water Separation: A Review

Dai

et al. 2021

Adv Materials Inter

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Oil/water separation is significantly important to the ecological system. A variety of materials have been explored to address this issue via the rational control of surface morphology, nanostructures, and chemical compositions of materials. Among them, hydrogels emerge as a potential option because of their interfacial features (i.e., superhydrophilicity and underwater superoleophobicity). Hydrogel‐coated materials are well studied and proven to have high efficiency in separating different oil/water mixtures under various conditions. This review provides an extensive summary and analyses on the progress of this topic, mainly focusing on the preparation of corresponding hydrogel‐coated materials and their performance and mechanism in oil/water separation. The perspective and the outlook for future studies are also given. This article may provide readers with guidance to quickly enter this area and give researchers some inspiration for future work.

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Multifunctional self-assembling hydrogel from guar gum

Cited by 78 publications

References 51 publications

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

Phosphorylation of Guar Gum/Magnetite/Chitosan Nanocomposites for Uranium (VI) Sorption and Antibacterial Applications

Design of facile technology for the efficient removal of hydroxypropyl guar gum from fracturing fluid

Hydrogel as a Superwetting Surface Design Material for Oil/Water Separation: A Review

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