Highly selective and straightforward recovery of gold and platinum from acidic waste effluents using cellulose-based bio-adsorbent

Biswas, Foni B.; Rahman, Ismail M.M.; Nakakubo, Keisuke; Endo, Masaru; Nagai, Kanji; Mashio, Asami S.; Taniguchi, Tsuyoshi; Nishimura, Tatsuya; Maeda, Katsuhiro; Hasegawa, Hiroshi

doi:10.1016/j.jhazmat.2020.124569

Cited by 65 publications

(12 citation statements)

References 46 publications

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“…The kinetics and adsorption isotherms of diverse contaminants containing aromatic rings, such as dyes, aromatic oils and herbicides were briefly studied. [85][86][87][88][89] The ratedetermining step was controlled by the adsorption process, namely the diffusion process of the toxic organic compound, which can act as a container to store the accumulated organic pollutants.…”

Section: Mechanism and Resolved Strategiesmentioning

confidence: 99%

Chemistry and Nanotechnology‐Oriented Strategies toward Nanocellulose for Human Water Treatment

Zha

Shi

et al. 2022

Advanced Sustainable Systems

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Section: Mechanism and Resolved Strategiesmentioning

confidence: 99%

Chemistry and Nanotechnology‐Oriented Strategies toward Nanocellulose for Human Water Treatment

Zha

Shi

et al. 2022

Advanced Sustainable Systems

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“…Modified cellulose materials have been attracting significant attention as efficient and cost-effective bio-based adsorbents. 19 − 21 Cellulose is the most abundant biopolymer with outstanding physical and chemical properties. Cellulose can be easily modified by oxidation, etherification, esterification, and graft copolymerization due to the active hydroxyl groups of the cellulose at the 2-, 3-, and 6-positions.…”

Section: Introductionmentioning

confidence: 99%

“… 22 − 24 Various chemically functionalized celluloses have been designed for the efficient recovery of heavy metals 25 , 26 and precious metals. 19 , 22 , 27 , 28 Incorporating sulfur functional groups on polymers is a promising approach for the design of adsorbents for soft metals. Adsorption characters of adsorbents, such as selectivity and adsorption capacity, depend on the structures of the sulfur functional groups bound to the adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of a Highly Selective Scavenger of Precious Metals from a Printed Circuit Board Based on Cellulose Filter Paper Functionalized with a Grafted Polymer Chain Bearing N-Methyl-2-hydroxyethylcarbamothioate Moieties

Hyder

Ochiai

2022

ACS Omega

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We report the synthesis and practical application of a novel scavenger for precious metals. The scavenger was prepared from cellulose filter paper with grafted chains of poly(glycidyl methacrylate) modified with a novel ligand group of N -methyl-2-hydroxyethylcarbamothioate moieties, introduced by the reaction with O -1-mercapto-3-phenoxypropan-2-yl N -methyl-2-hydroxyethylcarbamothioate. Batch experiments were performed to evaluate the capability of the scavenger in ranges of pH and acid concentration as well as to determine the kinetics and isotherm models. The scavenger was found to adsorb only Ag(I), Pd(II), and Au(III) from an aqueous media in the presence of coexisting ions of different bases and precious metals at wide ranges of pH and acid concentration. The adsorption rates fit a pseudo-second-order kinetic equation, and the adsorption reached equilibrium within 60 min. The isotherm studies indicated that the obtained data were a good fit with the Langmuir model. The maximum adsorption capacities of Ag(I), Pd(II), and Au(III) were 126.95, 124.67, and 230.67 mg g –1 , respectively. Regeneration experiments indicated that the adsorbent maintained 97% of its initial efficiency even after five adsorption/desorption cycles. The scavenger was effectively utilized to recover Ag(I), Pd(II), and Au(III) from an aqua regia solution of waste printed circuit boards.

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“…Currently, many adsorbents have been developed for Au (III) ions recovery, such as activated carbons, porous frameworks, polymeric matrixes, resins, gels, and mesoporous silica. [8][9][10][11][12][13][14][15][16][17] However, the current adsorbents still suffer from some problems, such as the low adsorption capacity, poor selectivity as well as slow adsorption kinetics. [18][19][20] Therefore, it is imperative to develop novel efficient adsorbents for selective gold recovery.…”

Section: Introductionmentioning

confidence: 99%

A Facile Approach to Sulfur‐Rich Covalent Organic Frameworks for Selective Recovery of Trace Gold

Liu

Zhang

Dong

et al. 2021

Macro Materials & Eng

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As one of the most precious metals with versatile uses, the global production needs of gold are much larger than its deposits. Therefore, it is imperative to recover gold from secondary sources so as to realize resource reuse and environmental protection. Due to the desirable physicochemical properties, covalent organic frameworks (COFs), especially the thiol/thioether-functionalized sulfur-rich COFs with strong affinity for Au ions, have exhibited promising prospects for gold recovery. However, their applications are still restricted by the commercially unavailable raw materials and complicated synthesis processes of thiol/thioether-functionalization. Here, a kind of sulfur-rich COFs (SCOFs) is designed and synthesized by Schiff base reaction in a single step from common commercial 4,4-diaminophenyl sulfide and 1,3,5-triformylbenzene, without any additional post-synthetic modifications. The structure and physicochemical properties of SCOFs are fully characterized, and the adsorption performance for trace Au (III) ions in water is systematically investigated. The results indicate that SCOFs can efficiently and selectively recover Au (III) ions from dilute aqueous solutions. Considering the commercially available raw materials, simple preparation process, fast adsorption and high selectivity, SCOFs exhibit great potential in the field of the recovery of gold ions from various wastewater of mining industries, metal processing, electronic manufacturing, and scrap.

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Highly selective and straightforward recovery of gold and platinum from acidic waste effluents using cellulose-based bio-adsorbent

Cited by 65 publications

References 46 publications

Chemistry and Nanotechnology‐Oriented Strategies toward Nanocellulose for Human Water Treatment

Chemistry and Nanotechnology‐Oriented Strategies toward Nanocellulose for Human Water Treatment

Synthesis of a Highly Selective Scavenger of Precious Metals from a Printed Circuit Board Based on Cellulose Filter Paper Functionalized with a Grafted Polymer Chain Bearing N-Methyl-2-hydroxyethylcarbamothioate Moieties

A Facile Approach to Sulfur‐Rich Covalent Organic Frameworks for Selective Recovery of Trace Gold

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