Adsorption recovery of Pd(II) from aqueous solutions by persimmon residual based bio-sorbent

Xie, Feng; Fan, Ruiyi; Quan, Yi; Fan, Zaijun; Luo, Zhengrong

doi:10.1016/j.hydromet.2016.01.005

Cited by 32 publications

(9 citation statements)

References 21 publications

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“…In addition to the phenolic groups, which abound in tannin resins, other functional groups may be also present in significant amounts, such as carboxylic groups, lactonic groups, and carbonyl groups . Tannin resins are characterized by an acidic surface, with isoelectric points occurring at pH 2 . This confirms the anionic nature of the tannin‐resins surface in a wide pH range, and its ability to interact with positively charged adsorbates by electrostatic attraction.…”

Section: Synthesis Of Tannin‐adsorbentssupporting

confidence: 58%

“…Even so, significant adsorbed amounts have been achieved in limited HCl medium . X‐Ray diffraction patterns and X‐ray photoelectron spectroscopy in the exhausted adsorbents has indicated the presence of both Pd(II) and Pd(0), suggesting that Pd adsorption results from surface complexation of Pd(II) species, and second, oxidation of hydroxyl groups with reduction of Pd(II) to Pd(0), The efficiency of tannin resins toward Pd(II) can be significantly improved by anchoring amine‐ligands, which also provides a selective uptake from Pd/Pt mixtures. In contrast to Au(III), which was reduced to elemental Au by both unmodified and amine‐modified resins, Pd(II) is not reduced by amine‐modified resins, but can form five membered chelates by contiguous N atoms of the adsorbent…”

Section: Adsorption Studiesmentioning

confidence: 99%

“…Some studies also show that higher temperatures favors the adsorption rate of precious metals. The reported contact times required to reach adsorption equilibrium of precious metals on tannin resins vary between <1 h and 6–24 h …”

Section: Adsorption Studiesmentioning

confidence: 99%

See 2 more Smart Citations

Tannin‐Adsorbents for Water Decontamination and for the Recovery of Critical Metals: Current State and Future Perspectives

Santos

Bacelo

Boaventura

et al. 2019

Biotechnology Journal

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Biosorption is known as an effective way to clean‐up water from organic and inorganic contaminants and has also emerged as a promising technology to recover critical substances. Tannins are renewable materials, coming from multiple vegetable sources. A variety of biosorbents have been developed from tannins, including tannin resins, rigid foams, composites with mesoporous silica, cellulose, collagen, and magnetic adsorbents. These materials have shown an excellent ability to uptake heavy‐metal cations (Cd(II), Cu(II), Pb(II), Ni(II), Cr(III)), owning to the chelating ability provided by the plentiful adjacent hydroxyl groups. In addition, tannin‐adsorbents have shown exceptional ability to remove Cr(VI), and to uptake Au(III) and Pd(II) from strong acidic solutions, which has evident application in the recovery of precious metals from e‐wastes leaching. The fact that tannin‐adsorbents can reduce the oxidation state of these adsorbates to Cr(III) and to elemental species of Au and Pd is interesting. Adsorption of dyes, surfactants, pharmaceuticals and antimony is also feasible, but the removal of certain metalloid species, such as arsenic and phosphate, seems to be limited even after applying chemical modifications. This article presents a systematic review on the preparation of tannin‐adsorbents and their application in water decontamination and in the recovery of critical metals.

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Section: Synthesis Of Tannin‐adsorbentssupporting

confidence: 58%

Section: Adsorption Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Tannin‐Adsorbents for Water Decontamination and for the Recovery of Critical Metals: Current State and Future Perspectives

Santos

Bacelo

Boaventura

et al. 2019

Biotechnology Journal

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“…The persimmon PA is the phenolic compounds, which has been associated with biological activities, including inhibition and antiviral, antianaphylaxis, prevention of cardiovascular and cerebrovascular diseases, anti-tumor, promotion of immunity and antioxidant activity (Zhang et al ., 2008). Morever, the persimmon PA is a kind of natural and eco-friendly adsorbent, it could be used to precious metal adsorption (Xie et al ., 2016; Fan et al ., 2019), water purification (Fan et al ., 2016), soil water retention (Luo et al ., 2019).…”

Section: Discussionmentioning

confidence: 99%

miRNA858b Inhibits Proanthocyanidin Accumulation by Repression ofDkMYB19andDkMYB20in Persimmon

Yang

Zhang

et al. 2019

Preprint

Self Cite

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13Persimmon proanthocyanidin (PA) biosynthetic had been reported to be 14 regulated by several transcription factors, but the miRNAs function involved in this 15 process was poorly understood. We identified a miRNA858b that putatively targeted 16 two R2R3-MYB transcription factors, DkMYB19/DkMYB20. Transcript accumulation 17 of DkMYB19/DkMYB20 and miRNA858b showed contrasting divergent expression 18 patterns during fruit development. DkMYB19/DkMYB20 were confirmed to be 19 localized in the nucleus. The interaction between miRNA858b and 20 DkMYB19/DkMYB20 were experimentally validated by 5' RNA ligase-mediated 21 RACE and LUC enzyme activity detection. Overexpression of miRNA858b led to the 22 33 Keywords 34 Persimmon 35 Proanthocyanidin 36 microRNA 37 MYB 38 39 157 provided evidence to that miRNA858b-MYB played an important role in the 158 regulation of PA biosynthesis in persimmon.159

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“…Furthermore, several studies have been conducted regarding the recovery of precious metals from liquids. In the literature, it has been shown that tannin-based adsorbent materials possess the ability to regain gold [ 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 ], silver [ 61 ], and palladium [ 53 , 54 , 55 , 57 , 58 , 61 , 62 ] ions from aqueous solutions. The recent research progress on tannin-based adsorbent materials can be found in greater detail elsewhere [ 19 ].…”

Section: Hybrid Materialsmentioning

confidence: 99%

Tannin-Based Hybrid Materials and Their Applications: A Review

et al. 2020

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Tannins are eco-friendly, bio-sourced, natural, and highly reactive polyphenols. In the past decades, the understanding of their versatile properties has grown substantially alongside a continuously broadening of the tannins’ application scope. In particular, recently, tannins have been increasingly investigated for their interaction with other species in order to obtain tannin-based hybrid systems that feature advanced and/or novel properties. Furthermore, in virtue of the tannins’ chemistry and their high reactivity, they either physicochemically or physically interact with a wide variety of different compounds, including metals and ceramics, as well as a number of organic species. Such hybrid or hybrid-like systems allow the preparation of various advanced nanomaterials, featuring improved performances compared to the current ones. Consequently, these diverse-shaped materials have potential use in wastewater treatment or catalysis, as well as in some novel fields such as UV-shielding, functional food packaging, and biomedicine. Since these kinds of tannin-based hybrids represent an emerging field, thus far no comprehensive overview concerning their potential as functional chemical building blocks is available. Hence, this review aims to provide a structured summary of the current state of research regarding tannin-based hybrids, detailed findings on the chemical mechanisms as well as their fields of application.

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Adsorption recovery of Pd(II) from aqueous solutions by persimmon residual based bio-sorbent

Cited by 32 publications

References 21 publications

Tannin‐Adsorbents for Water Decontamination and for the Recovery of Critical Metals: Current State and Future Perspectives

Tannin‐Adsorbents for Water Decontamination and for the Recovery of Critical Metals: Current State and Future Perspectives

miRNA858b Inhibits Proanthocyanidin Accumulation by Repression ofDkMYB19andDkMYB20in Persimmon

Tannin-Based Hybrid Materials and Their Applications: A Review

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