Chemical modified tannins from Pinus patula bark for selective biosorption of gold in aqueous media

Petins, Marlon Manuel Cuetocue; Sarria-Villa, Rodrigo Andrés; Benítez, Ricardo; Corredor, José Antonio Gallo

doi:10.1016/j.jece.2021.106162

Cited by 9 publications

(6 citation statements)

References 45 publications

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“…To date, there have been several methods that were utilized for gold recovery, such as ion exchange resins, solvent extraction, electrodeposition, and adsorption . Choi et al used an ion exchange resin method to recover Au from circuit board leaching wastewater with a recovery ratio of 98% .…”

Section: Introductionmentioning

confidence: 99%

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Tang

2022

Langmuir

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The efficient enrichment and selection of Au are crucial for gold recovery. The adsorption technology is considered to have potential due to the advantages of operation simplicity and green processability. Nevertheless, the poor Au selectivity at low concentrations in complex solutions limits the further application of the adsorption technology. In this work, a novel Cr-based MOF adsorbent was successfully synthesized using 1,2,4-triazole and 4-aminobenzoic acid as ligands. Benefitting from the surface positive charge and extensive chelation and reduction sites, the novel Cr-based MOF exhibited a total adsorption capacity of up to 357 mg/g and excellent adsorption selectivity toward Au(III) in the complex metal mixed solutions, such as simulated sewage ash waste liquid and actual e-waste leachate. Furthermore, the adsorption kinetics, isotherms, and thermodynamics were discussed in depth for investigating the adsorption mechanisms of the MOF. The PXRD and XPS analyses reveal that the adsorption process involves complexation, redox, and electrostatic interactions. We believe that this study of novel Cr-based MOF adsorbents for efficient Au adsorption is meaningful for further application in the gold recovery technology from e-waste.

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Section: Introductionmentioning

confidence: 99%

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Tang

2022

Langmuir

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“…Currently, various processes for water decontamination are investigated daily [ 1 , 2 , 3 , 4 ], among which are the precipitation of metals by the formation of hydroxides and the adsorption of metals, which are widely used due to their speed and effectiveness. However, numerous drawbacks inclusive of excessive cost, using poisonous solvents and the discharge of environmentally unacceptable chemicals, are related to those extraction strategies for heavy metals [ 3 , 5 , 6 ]. Many of the studies are focusing on replacing common adsorbents with biomaterials, because these are lower cost and in addition to being friendly to the environment, they can be modified more easily; [ 7 , 8 , 9 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, numerous drawbacks inclusive of excessive cost, using poisonous solvents and the discharge of environmentally unacceptable chemicals, are related to those extraction strategies for heavy metals [ 3 , 5 , 6 ]. Many of the studies are focusing on replacing common adsorbents with biomaterials, because these are lower cost and in addition to being friendly to the environment, they can be modified more easily; [ 7 , 8 , 9 , 6 ]. some biomaterials have even come to have better adsorbent capacities than the usual materials [ 10 , 11 , 12 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…Many of the studies are focusing on replacing common adsorbents with biomaterials, because these are lower cost and in addition to being friendly to the environment, they can be modified more easily; [ 7 , 8 , 9 , 6 ]. some biomaterials have even come to have better adsorbent capacities than the usual materials [ 10 , 11 , 12 , 6 ]. In retention processes, more attention has been focused on metal ion recovery and reuse methods.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, is necessary to control the levels of mercury in the zones and more severe regulations [ 18 , 19 , 20 , 21 ]. Due to the need to reduce mercury contamination in mining areas, one of the strategies proposed worldwide is the use of environmentally friendly adsorbents derived from biomass for mercury recovery [ 2 , 22 , 6 ]. Mining activity in Colombia has increased in recent years, increasing the levels of mercury present in water and sediments.…”

Section: Introductionmentioning

confidence: 99%

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Mercury (II) removal from aqueous solutions by iron nanoparticles synthesized from extract of Eucalyptus grandis

Pabón

Sarria-Villa

et al. 2022

Heliyon

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Rapid Reduction and Recovery of Au(III) in Water by Hollow Polym‐phenylenediamine Nanospheres

et al. 2022

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To quickly and efficiently recover precious metal gold from electronic waste products, we synthesized a novel hollow polym‐phenylenediamine (PmPD) nanosphere using the sacrificial template method and applied this materials to reduce and recover Au(III) in an aqueous solution. Experimental results show that the as‐prepared hollow PmPD has high selectivity and treatment capacity for Au(III), and can selectively reduce Au(III) from mixture metals solutions, including Cu2+, Zn2+, Ni2+, Cd2+, and Au(III) mixed solutions. Under room temperature and solution pH 4.0, the maximum treatment capacity of hollow PmPD for Au(III) reaches 1185.18 mg/g in 10 min of equilibrium time. The reduction ability of hollow PmPD remains stable in a pH range of 1.0 to 10.0 and under an ambient temperature ranging from 0 °C to 50 °C. Hollow PmPD can be regenerated via simple NaHSO3 solution washing, and its performance remains stable after repeated recycling. The satisfactory results obtained in treating the computer CPU leaching solution suggest that the hollow PmPD has broad application prospects in recovering gold from e‐waste.

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Chemical modified tannins from Pinus patula bark for selective biosorption of gold in aqueous media

Cited by 9 publications

References 45 publications

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Cr-Based MOF for Efficient Adsorption of Au at Low Concentrations

Mercury (II) removal from aqueous solutions by iron nanoparticles synthesized from extract of Eucalyptus grandis

Rapid Reduction and Recovery of Au(III) in Water by Hollow Polym‐phenylenediamine Nanospheres

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