Study on the removal of oxidized mercury (Hg2+) from flue gas by thiol chelating resin

Fu, Kang-Li; Yao, Mingyu; Qin, Chuanguang; Cheng, Guangwen; Li, Yang; Cai, Mingxuan; Yang, Song; Jianping, Nie

doi:10.1016/j.fuproc.2016.02.014

Cited by 23 publications

(10 citation statements)

References 48 publications

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“…The desorption of HgSe and Cu 2 Se can be attributed to ion-exchange because H + exchanges with Hg 2+ and Cu + in strongly acidic media to form water-soluble HgCl 2 and a CuCl precipitate. 46 After reselenization, the same crystallinity was obtained for regenerated and fresh Cu-hs, as demonstrated by the XRD patterns (shown in Figure S13). The Hg 0 removal performance was fully recovered and maintained at the initial level during four adsorption−regeneration cycles (shown in Figure 6).…”

Section: ■ Materials and Methodsmentioning

confidence: 52%

“…This observation suggests that the adsorbed HgSe, together with the decorated Cu 2 Se, was cleared from the Cu-hs. The desorption of HgSe and Cu 2 Se can be attributed to ion-exchange because H + exchanges with Hg 2+ and Cu + in strongly acidic media to form water-soluble HgCl 2 and a CuCl precipitate . After reselenization, the same crystallinity was obtained for regenerated and fresh Cu-hs, as demonstrated by the XRD patterns (shown in Figure S13).…”

Section: Resultsmentioning

confidence: 74%

“…Second, the structure of the sorbent might be destroyed under multiple high-temperature thermal treatments, whereas the HCl leaching procedure maintains the framework of the Cu foam while desorbing the adsorbed HgSe. For general sorbents, the limited Hg adsorption content led to a Hg concentration as low as a few milligrams or micrograms per m 3 regeneration stream. ,, Such a low concentration of Hg would restrict the Hg recovery ratio by typical methods, such as condensation, and increase the overall cost. In contrast, the Hg concentration in the leachate was as high as 4368.71 mg·L, which would facilitate the recovery of mercury using electrowinning technology.…”

Section: Resultsmentioning

confidence: 99%

“…For general sorbents, the limited Hg adsorption content led to a Hg concentration as low as a few milligrams or micrograms per m 3 regeneration stream. 46,51,52 Such a low concentration of Hg would restrict the Hg recovery ratio by typical methods, such as condensation, and increase the overall cost. In contrast, the Hg concentration in the leachate was as high as 4368.71 mg•L, which would facilitate the recovery of mercury using electrowinning technology.…”

Section: ■ Materials and Methodsmentioning

confidence: 99%

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In Situ Decoration of Selenide on Copper Foam for the Efficient Immobilization of Gaseous Elemental Mercury

Yang

Qin

et al. 2020

Environ. Sci. Technol.

110

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Mercury emission from industrial activities is a great threat to public health and ecosystems. Developing new strategies and materials to remove mercury still remains a serious task. Herein, selenide-decorated copper foam prepared by a heating-stirring method (Cu-hs) was used as a monolithic mercury adsorption material. The Cu-hs exhibited much better adsorption of elemental mercury (Hg 0 ) compared with the selenidedecorated cordierite honeycomb prepared by the same method (Cordierite-hs). Nearly 100% Hg 0 adsorption efficiency was obtained under a high gaseous hourly space velocity of 6.0 × 10 4 . Excellent Hg 0 adsorption capacity was obtained in a wide range of reaction temperatures from 40 to 120 °C, suggesting the good adaptability of Cu-hs in different operating conditions. The Cu-hs exhibited high selectivity for Hg 0 against H 2 O and SO 2 , which is advantageous for real applications in industrial flue gas. The Hg 0 adsorption capacity of Cu-hs reached 3743 g/m 3 , about 14 times higher than the 243 g/m 3 of Cordierite-hs. The excellent Hg 0 adsorption performance of Cu-hs was attributed to the high affinity of the selenium in Cu 2 Se for mercury, the homogeneous distribution of Cu 2 Se, and the superior fluid characteristics of the Cu foam substrate. The adsorption performance of the spent Cu-hs could be effectively recovered by HCl solution leaching and subsequent reselenization. The utilization of recyclable Cu-hs provides a cost-effective and environmentally friendly method for removing mercury from industrial flue gas.

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Section: ■ Materials and Methodsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 99%

Section: ■ Materials and Methodsmentioning

confidence: 99%

See 2 more Smart Citations

In Situ Decoration of Selenide on Copper Foam for the Efficient Immobilization of Gaseous Elemental Mercury

Yang

Qin

et al. 2020

Environ. Sci. Technol.

110

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“…During the last few years, grafting chelation groups into the silica gel surface had been a major way to develop effective adsorbents based on silica gel. Ligand groups containing nitrogen, oxygen, and sulfur atoms have been employed to improve affinities for Hg(II) ions [20,21,22,23]. In particular, polyamine has been widely used as ligands due to its properties of high density of nitrogen as binding sites for Hg(II) [16].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of 3D Graphene–Silica Hydrogel Composite for Enhanced Removal of Mercury Ions

et al. 2019

Nanomaterials

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Adsorption is a highly promising and widely used approach to remove Hg(II) ions from contaminated water. The key to this technology is exploring the effective adsorbent. The three-dimensional (3D) graphene as reduced graphene oxide hydrogel (rGH)-encapsulated silica gel (SG-PEI/rGH) was prepared by a moderate chemical reduction strategy using ascorbic acid. This composite structure was characterized by FTIR, XRD, and SEM analysis and used as adsorbents for Hg(II) ions. Its adsorption capacity toward Hg(II) ions was 266 mg/g and increased about 32% compared with the silica gel because of reduced graphene oxide hydrogel (rGH). Mechanism study showed that the high adsorption ability was due to the formation of an N–Hg complex with multi-amino groups on the surface of polyethyleneimine-modified silica gel (SG-PEI) and the rapid diffusion of adsorbed ions attributed to the rGH network structure. This composite SG-PEI/rGH would be a promising material for the removal of Hg(II) ions.

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How Can Plant‐microbe Interactions be used for the Bioremediation of Metals in Water Bodies?

Petroceli‐Mota,

da Cruz Lima,

de Abreu

et al. 2024

Microbes Based Approaches for the Management of Hazardous Contaminants

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Study on the removal of oxidized mercury (Hg2+) from flue gas by thiol chelating resin

Cited by 23 publications

References 48 publications

In Situ Decoration of Selenide on Copper Foam for the Efficient Immobilization of Gaseous Elemental Mercury

In Situ Decoration of Selenide on Copper Foam for the Efficient Immobilization of Gaseous Elemental Mercury

Facile Fabrication of 3D Graphene–Silica Hydrogel Composite for Enhanced Removal of Mercury Ions

How Can Plant‐microbe Interactions be used for the Bioremediation of Metals in Water Bodies?

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