Noble metal-based sorbents: A way to avoid new waste after mercury removal

Antuña-Nieto, Cristina; Rodríguez, Edgar Charry; López-Antón, M. Antonia; Garcı́a, Roberto; Martı́nez-Tarazona, M. Rosa

doi:10.1016/j.jhazmat.2020.123168

Cited by 25 publications

(4 citation statements)

References 62 publications

(74 reference statements)

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“…To begin with, mercury (Hg) is a highly toxic heavy metal with a damaging level of corrosiveness. Its contamination of water bodies also threatens the industrial sector due to its corrosive impact on machinery containing aluminum [15]. In terms of health measures, long-term exposure to this metal can cause neurological disorders and paralysis.…”

Section: Heavy Metal-contaminated Watermentioning

confidence: 99%

The Utilization of Algae and Seaweed Biomass for Bioremediation of Heavy Metal-Contaminated Wastewater

2022

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The presence of heavy metals in water bodies is linked to the increasing number of industries and populations. This has serious consequences for the quality of human health and the environment. In accordance with this issue, water and wastewater treatment technologies including ion exchange, chemical extraction, and hydrolysis should be conducted as a first water purification stage. However, the sequestration of these toxic substances tends to be expensive, especially for large scale treatment methods that require tedious control and have limited efficiency. Therefore, adsorption methods using adsorbents derived from biomass represent a promising alternative due to their great efficiency and abundance. Algal and seaweed biomass has appeared as a sustainable solution for environmentally friendly adsorbent production. This review further discusses recent developments in the use of algal and seaweed biomass as potential sorbent for heavy metal bioremediation. In addition, relevant aspects like metal toxicity, adsorption mechanism, and parameters affecting the completion of adsorption process are also highlighted. Overall, the critical conclusion drawn is that algae and seaweed biomass can be used to sustainably eliminate heavy metals from wastewater.

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Section: Heavy Metal-contaminated Watermentioning

confidence: 99%

The Utilization of Algae and Seaweed Biomass for Bioremediation of Heavy Metal-Contaminated Wastewater

2022

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“…To keep the surface activity and cycling performance of Ag nanoparticles, Ag nanoparticles are always immobilized on the surface of different solid supports. Many common porous materials were used for Ag loading, such as chabazite, molecular sieves, and carbon-based materials . However, the Hg 0 capture capacity of the reported Ag-based sorbents is still limited and the Hg 0 removal efficiency is unsatisfactory especially in the complex atmosphere with SO 2 due to the formation of Ag 2 S .…”

Section: Introductionmentioning

confidence: 99%

“…Many common porous materials were used for Ag loading, such as chabazite, 16 molecular sieves, 17 and carbon-based materials. 18 However, the Hg 0 capture capacity of the reported Ag-based sorbents is still limited and the Hg 0 removal efficiency is unsatisfactory especially in the complex atmosphere with SO 2 due to the formation of Ag 2 S. 19 Liu et al 20 reported the nanosilver composites supported on the chabazite with good regeneration performance for Hg 0 capture below 250 °C, but the Hg 0 capture capacity was only 0.137 μg g −1 for 5 min. Zhao et al 21 reported the Ag−Momodified SCR catalyst (Ag−Mo/V−Ti) for efficient Hg 0 removal, but 500 ppm SO 2 caused the efficiency to decline by about 10% even though Mo was resistant toward SO 2 .…”

Section: Introductionmentioning

confidence: 99%

Elemental Mercury Removal from Flue Gas over Silver-Loaded CuS-Wrapped Fe₃O₄ Sorbent

Zhang

Zhou

et al. 2021

Energy Fuels

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In this study, CuS-wrapped Fe 3 O 4 was selected as the support for Ag loading to prepare a recyclable magnetic Agbased sorbent for zero-valent mercury (Hg 0 ) removal. The synthesized Ag/CuS@Fe 3 O 4 sorbent showed outstanding Hg 0 removal activity and SO 2 resistance at 50 °C. The Hg 0 capture capacity of Ag/CuS@Fe 3 O 4 was 18.72 μg g −1 for 5 min, which was about 3.40 and 1.11 times higher than those of bare Fe 3 O 4 and CuS@Fe 3 O 4 . Exposure of Ag/CuS@Fe 3 O 4 to the simulated gas containing SO 2 (0.05 v/v%) at 50 °C achieved the Hg 0 removal efficiency of >84% during 3 h activity test. Characterization results indicated that both Cu and S sites of CuS were active sites in the reaction process, providing high Hg 0 capture capacity. Meanwhile, the Ag species not only provided new activity sites but also improved the reactive activity of Cu sites due to the formation of ternary amalgam. In addition, the S sites were supplemented by SO 2 , which prevented the Ag active sites from being destructed by the formation of Ag 2 S.

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“…Very often, the recovery of gold from these wastes is done by leaching of the waste with aqua regia, resulting in a leachate in which gold is present as AuCl 4 − or HAuCl 4 [5]. The recovery of this precious metal from the HCl solution can be done mainly by activated carbon [6], ion exchange resins [7][8][9][10], liquid-liquid extraction using conventional [11][12][13] and ionic liquid [14][15][16][17] extractants, different adsorbents [18][19][20][21][22], and as mentioned above by liquid membranes [23][24][25][26]; more recently, the use of carbon nanotubes have been also considered in the treatment of diluting Au(III)-bearing HCl solutions [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Transport of Au(III) from HCl Medium across a Liquid Membrane Using R3NH+Cl−/Toluene Immobilized on a Microporous Hydrophobic Support: Optimization and Modelling

2020

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By the use of the tertiary amine A327 and 1 M HCl solution as precursors, the ionic liquid A327H+Cl− was generated and used to investigate its performance in the transport of Au(III) from hydrochloric acid medium. The influence of the stirring speed (600–1800 min−1), ionic liquid concentration (1.25–50% v/v) in the membrane phase, and gold concentration (0.01–0.15 g/L) in the feed phase on metal transport have been investigated. An equation which included both equilibrium and kinetics parameters was derived, and the membrane diffusional resistance (Δm) and feed phase diffusional resistance (Δf) was estimated as 9.5 × 106 s/cm and 307 s/cm, respectively. At carrier concentrations in the 5–50% v/v range and gold concentrations in the 0.01–0.15 g/L range, metal transport is controlled by diffusion of metal species through the feed boundary layer, whereas at the lowest carrier concentrations, membrane diffusion is predominant. From the receiving solutions, gold can be recovered as gold nanoparticles.

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Noble metal-based sorbents: A way to avoid new waste after mercury removal

Cited by 25 publications

References 62 publications

The Utilization of Algae and Seaweed Biomass for Bioremediation of Heavy Metal-Contaminated Wastewater

The Utilization of Algae and Seaweed Biomass for Bioremediation of Heavy Metal-Contaminated Wastewater

Elemental Mercury Removal from Flue Gas over Silver-Loaded CuS-Wrapped Fe₃O₄ Sorbent

Transport of Au(III) from HCl Medium across a Liquid Membrane Using R3NH+Cl−/Toluene Immobilized on a Microporous Hydrophobic Support: Optimization and Modelling

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Noble metal-based sorbents: A way to avoid new waste after mercury removal

Cited by 25 publications

References 62 publications

The Utilization of Algae and Seaweed Biomass for Bioremediation of Heavy Metal-Contaminated Wastewater

The Utilization of Algae and Seaweed Biomass for Bioremediation of Heavy Metal-Contaminated Wastewater

Elemental Mercury Removal from Flue Gas over Silver-Loaded CuS-Wrapped Fe3O4 Sorbent

Transport of Au(III) from HCl Medium across a Liquid Membrane Using R3NH+Cl−/Toluene Immobilized on a Microporous Hydrophobic Support: Optimization and Modelling

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Elemental Mercury Removal from Flue Gas over Silver-Loaded CuS-Wrapped Fe₃O₄ Sorbent