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Two-Dimensional Materials for Heavy Metal Removal

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Remediation of Heavy Metals

Abstract

Two-dimensional materials are referring to the materials which are confined in one dimension and growing in another two dimensions. Based on the chemical composition, two-dimensional materials can be further classified into single element layered two-dimensional material, such as graphene and phosphorene, and mixed elements two-dimensional materials, such as transition metal dichalcogenides, MXenes, clay minerals, layered double hydroxides and so on.

This chapter highlights the applications of two-dimensional materials on removing heavy metal ions from aquatic environment. The heavy metal ions removal mechanisms, including surface complexation, van der Waals force, and ion exchange were illustrated combining with typical examples of heavy metal ions removal by two-dimensional materials. Six recently extensively studied types of two-dimensional materials, graphene-based materials, dichalcogenides, MXenes, clay minerals, layered double hydroxides, and layered zeolites, have been discussed in details. Reference to the classification of two-dimensional materials, the most recent researches on developing two-dimensional materials for heavy metal removal, together with a perspective that could be instructive for future research in this topic has been addressed.

By employing different functionalities and techniques, the two-dimensional materials can be fabricated as adsorbents, membranes or electro-device to remove heavy metal from aqueous environment. In this chapter, most of the heavy metal removal by two-dimensional materials mentioned were based on adsorption techniques, because adsorption is one of the most intensive studied techniques for removing heavy metals, especially for novel two-dimensional materials. Besides, the heavy metal removal techniques other than adsorption were also introduced briefly in this chapter.

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Correspondence to Hong Chen .

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Appendix: List of Two-Dimensional Materials that Mentioned in this Chapter for Heavy Metal Removal and their Removal Capacities

Appendix: List of Two-Dimensional Materials that Mentioned in this Chapter for Heavy Metal Removal and their Removal Capacities

Two-dimensional Materials

Metal Ion

Removal capacity (mg/g)

References

GNS500

Pb2+

35.2

Huang et al. (2011)

GNS/MnO2

Cu2+

Pb2+

102

161

Ren et al. (2012)

Few-layered GO nanosheets

Cd2+

Co2+

106.3

68.2

Zhao et al. (2011)

GO powder

Cu2+

Zn2+

Cd2+

Pb2+

294

345

530

1119

Sitko et al. (2013)

GO/CdS(en) composite

Cu2+

137.2

Jiang et al. (2015)

Amino functionalized

Fe3O4-GS

Cr6+

Pb2+

Hg2+

Cd2+

Ni2+

17.3

27.9

23.0

27.8

22.1

Guo et al. (2014)

RGOS

(rGO grafted by 4-sulfophenylazo groups)

Pb2+

Cu2+

Ni2+

Cd2+

Cr3+

689

59

66

267

191

Zhang et al. (2018)

CoFe2O4-rGO composite

Pb2+

Hg2+

299.4

157.9

Zhang et al. (2014)

g-C3N4/rGH

Cr6+

49.7

Wang et al. (2017b)

rGO/LDH

U6+

277.8

Tan et al. (2015)

rGO-poly(C3N3S3) matrix

Pb2+

Hg2+

270

400

Fu et al. (2019)

Commercial MoS2

(2.98 Å d-spacing)

Hg2+

35.5

Ai et al. (2016)

Interlayer widen MoS2

(9.4 Å d-spacing)

Hg2+

2562.8

Ai et al. (2016)

Ce-MoS2

Ag2+

980

Wang et al. (2018)

Alk-MXenes

Pb2+

140

Peng et al. (2014b)

Layered titanates

Ag+

Cu2+

Pb2+

Eu3+

546.5

202.3

563.0

264.0

Li et al. (2012)

Ti3C2Tx MXenes

U6+

Pb2+

Cr6+

Ba2+

Cu2+

214

328.9

250

9.3

78.5

Wang et al. (2017a)

Gu et al. (2019)

Ying et al. (2015)

Fard et al. (2017)

Shahzad et al. (2017)

Kaolinite

Cd2+

Cr6+

9.9

11.6

Bhattacharyya and Gupta (2008)

Acid-activated kaolinite

Cd2+

Cr6+

11.4

13.9

Bhattacharyya and Gupta (2008)

Montmorillonite

Cd2+

32.7

Bhattacharyya and Gupta (2008)

Acid-activated montmorillonite

Cd2+

33.2

Bhattacharyya and Gupta (2008)

Bentonite

Cd2+

9.3

Bhattacharyya and Gupta (2008)

LS-LDH

Cu2+

75

Ma et al. (2016)

EDTA-LDH

Cu2+

71

Ma et al. (2016)

MoS4-LDH

Cu 2+

Hg2+

Ag+

181

500

450

Ma et al. (2016)

RUB-15

UO22+

Pb2+

Cd2+

152

338

190

Chen et al. (2017)

AMH-3

Pb2+

Cu2+

Cd2+

Zn2+

238.5

180.3

64.3

26.6

Kim and Kwak (2017)

COF-S-SH

Hg2+

Hg0

1350

863

Sun et al. (2017)

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Luo, S., Chen, H. (2021). Two-Dimensional Materials for Heavy Metal Removal. In: Inamuddin, Ahamed, M.I., Lichtfouse, E., Altalhi, T. (eds) Remediation of Heavy Metals. Environmental Chemistry for a Sustainable World, vol 70. Springer, Cham. https://doi.org/10.1007/978-3-030-80334-6_4

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