Eco-friendly and economical gold extraction by nickel catalyzed ammoniacal thiosulfate leaching-resin adsorption recovery

Xu, Bin; Li, Ké; Dong, Zhonglin; Yang, Yongbin; Li, Qian; Liu, Xiaoliang; Jiang, Tao

doi:10.1016/j.jclepro.2019.06.182

Cited by 78 publications

(62 citation statements)

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“…[3] The consequence of the excessive usage of gold making its source is kept depleting by days. [4,5] Commonly found as gold(III) ions, its recovery from urban mine may act as an untapped resource in the future. [6,7] Conventional methods for gold(III) ions recovery are adsorption, solvent extraction, chemical precipitation, and membrane filtration.…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

“…All the nitro-substituted C-phenylcalix[4]resorcinarenes showed higher maximum adsorption capacity as compared to the bare C-phenylcalix[4]resorcinarene. A remarkable high adsorption capacity of up to 272.70 mg g À 1 was obtained after 2 h on the C-2-nitrophenylcalix[4]resorcinarene (Calix-2NO 2 ), which was two times higher than that of the C-phenylcalix [4] resorcinarene. The adsorption capacity was affected by the position of the nitro group.…”

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The Role of a Nitro Substituent in C‐Phenylcalix[4]resorcinarenes to Enhance the Adsorption of Gold(III) Ions

2021

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Nitro-substituted C-phenylcalix [4]resorcinarene derivatives were synthesized and evaluated for gold(III) ions adsorption. All the nitro-substituted C-phenylcalix[4]resorcinarenes showed higher maximum adsorption capacity as compared to the bare C-phenylcalix[4]resorcinarene. A remarkable high adsorption capacity of up to 272.70 mg g À 1 was obtained after 2 h on the C-2-nitrophenylcalix[4]resorcinarene (Calix-2NO 2 ), which was two times higher than that of the C-phenylcalix [4] resorcinarene. The adsorption capacity was affected by the position of the nitro group. The highest adsorption capacity observed on the Calix-2NO 2 was closely related to the strongest supramolecular interactions between the gold(III) ions and the Calix-2NO 2 , as supported by Fourier transform infrared (FTIR) and proton nuclear magnetic resonance ( 1 H-NMR) spectroscopies as well as the desorption study. This study demonstrated that the macrocyclic material, namely nitro-substituted C-phenylcalix[4]resorcinarenes, were effective adsorbents having good reusability, and thus, applicable for gold(III) ions recovery.

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Section: Introductionmentioning

confidence: 99%

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The Role of a Nitro Substituent in C‐Phenylcalix[4]resorcinarenes to Enhance the Adsorption of Gold(III) Ions

2021

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“…However, gold resources on Earth are small and non-renewable, while at the same time, there is increasing demand and decreasing amounts of gold deposits which will limit the practical application of gold to a certain extent, such that the recovery and reuse of gold is of particular importance. For this reason, precious metals in wastewater have gradually attracted individual’s attention [ 6 , 7 ]. Because recycling from aqueous solution is more economical than mining and metallurgy, and it is simple to operate and environment friendly [ 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents

Huang

et al. 2020

Materials

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Herein, adsorption, separation, and reduction of Au(III) from its aqueous solution were studied with different amine-type, non-woven fabric (NF) adsorbents fabricated with radiation-induced graft polymerization. The adsorbents exhibited different adsorption capacities of Au(III) over a concentration range of hydrochloric acid (HCl) from 5 mM to 5 M, and the diethylamine (DEA)-type adsorbent performed best under all test conditions. The DEA-type adsorbent was inert toward other metal ions, including Cu(II), Pb(II), Ni(II), Zn(II) and Li(I), within the fixed concentration range of HCl. Flow-through adsorption tests indicated DEA-type adsorbent exhibited a rapid recovery and high adsorption capacity of 3.23 mmol/g. Meanwhile, DEA-type adsorbent also exhibited high selectivity and rapid extraction for Au(III) from its mixed solution with Pt(IV) and Pd(II). After adsorption, the reduction of Au(III) was confirmed by XRD spectra, TEM, and digital micrograph images. The results indicated that nano-sized Au particles were mainly concentrated on the adsorbent in 5 mM HCl solution. In 1 M HCl solution, not only nano-sized Au particles were found, but also micro-size Au plates precipitation occurred. This study provides a novel material for selective and efficient gold uptake from aqueous solution.

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“…It uses different chemical reagents like cyanide, halide, thiosulphate, and thiourea for the gold recovery from the E-wastes. However, it has the high risk of toxic sludge production [12][13][14][15]. It involves oxidative leaching gold [16].…”

Section: Introductionmentioning

confidence: 99%

Extraction of gold from electronic scraps: a biohydrometallurgical process overview

2019

Biointerface Res Appl Chem

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The explosive growth in the electronics industries has revolutionized modern human life. This has resulted in the enhanced electronic wastes (E-wastes) generation which affects adversely on the global environment. The E-wastes are the end life electronics devices like computers, televisions, VCRs, stereos, copiers, mobile phones, and fax machines, generally discarded without following the standard procedure established by the environmental protection agencies of different countries. They are assembled of different materials which compose various toxic metals and organic compounds; therefore, there is the risk of environmental leaching problems when discarded as such without precaution. There are different policies and steps established for the E-wastes management and the recovery of valuable metals from them is one of the suitable steps. They contain different valuable metals like copper, silver, gold, palladium, rhodium and harmful substances like beryllium, cadmium, mercury, and lead. Gold is a precious metal, which can be recovered by applying conventional techniques such as pyro- and hydro- metallurgy. However, environmental risks are always associated with the above techniques. Bio-hydrometallurgy technique has potential to overcome the issues related to the conventional techniques. Different microorganisms help directly or indirectly in the dissolution reactions of gold from the E-wastes. Acidophilus microorganisms, such as Chromobacterium violaceum, Acidithiobacillus thiooxidans, Acidithiobacillus ferrooxidans, Aspergillus niger, Penicillium simplicissimum and many more, have proved their gold dissolution properties. However it is a slow process compared to that in the conventional techniques, which should be addressed comprehensively.

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Eco-friendly and economical gold extraction by nickel catalyzed ammoniacal thiosulfate leaching-resin adsorption recovery

Cited by 78 publications

References 50 publications

The Role of a Nitro Substituent in C‐Phenylcalix[4]resorcinarenes to Enhance the Adsorption of Gold(III) Ions

The Role of a Nitro Substituent in C‐Phenylcalix[4]resorcinarenes to Enhance the Adsorption of Gold(III) Ions

Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents

Extraction of gold from electronic scraps: a biohydrometallurgical process overview

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