Soil amendments for immobilization of potentially toxic elements in contaminated soils: A critical review

Kumuduni Niroshika Palansooriya, Sabry M. Shaheen, Season S. Chen, Daniel C.W. Tsang, Yohey Hashimoto, Deyi Hou, Nanthi S. Bolan, Jörg Rinklebe, Yong Sik Ok

Research output: Contribution to journalReview article

4 Citations (Scopus)

Abstract

Soil contamination by potentially toxic elements (PTEs) has led to adverse environmental impacts. In this review, we discussed remediation of PTEs contaminated soils through immobilization techniques using different soil amendments with respect to type of element, soil, and amendment, immobilization efficiency, underlying mechanisms, and field applicability. Soil amendments such as manure, compost, biochar, clay minerals, phosphate compounds, coal fly ash, and liming materials are widely used as immobilizing agents for PTEs. Among these soil amendments, biochar has attracted increased interest over the past few years because of its promising surface properties. Integrated application of appropriate amendments is also recommended to maximize their use efficiency. These amendments can reduce PTE bioavailability in soils through diverse mechanisms such as precipitation, complexation, redox reactions, ion exchange, and electrostatic interaction. However, soil properties such as soil pH, and clay, sesquioxides and organic matter content, and processes, such as sorption/desorption and redox processes, are the key factors governing the amendments' efficacy for PTEs immobilization in soils. Selecting proper immobilizing agents can yield cost-effective remediation techniques and fulfill green and sustainable remediation principles. Furthermore, long-term stability of immobilized PTE compounds and the environmental impacts and cost effectiveness of the amendments should be considered before application.

Original languageEnglish
Article number105046
JournalEnvironment International
Volume134
DOIs
Publication statusPublished - 2020 Jan

Fingerprint

Poisons
soil amendment
Immobilization
immobilization
Soil
remediation
soil
environmental impact
Coal Ash
liming
complexation
fly ash
compost
bioavailability
clay mineral
manure
desorption
ion exchange
soil property
Oxidation-Reduction

Keywords

  • Bioavailability
  • Green/sustainable remediation
  • Soil amendment
  • Soil quality
  • Toxic metal(loid)s

ASJC Scopus subject areas

  • Environmental Science(all)

Cite this

Soil amendments for immobilization of potentially toxic elements in contaminated soils : A critical review. / Palansooriya, Kumuduni Niroshika; Shaheen, Sabry M.; Chen, Season S.; Tsang, Daniel C.W.; Hashimoto, Yohey; Hou, Deyi; Bolan, Nanthi S.; Rinklebe, Jörg; Ok, Yong Sik.

In: Environment International, Vol. 134, 105046, 01.2020.

Research output: Contribution to journalReview article

Palansooriya, KN, Shaheen, SM, Chen, SS, Tsang, DCW, Hashimoto, Y, Hou, D, Bolan, NS, Rinklebe, J & Ok, YS 2020, 'Soil amendments for immobilization of potentially toxic elements in contaminated soils: A critical review', Environment International, vol. 134, 105046. https://doi.org/10.1016/j.envint.2019.105046
Palansooriya, Kumuduni Niroshika ; Shaheen, Sabry M. ; Chen, Season S. ; Tsang, Daniel C.W. ; Hashimoto, Yohey ; Hou, Deyi ; Bolan, Nanthi S. ; Rinklebe, Jörg ; Ok, Yong Sik. / Soil amendments for immobilization of potentially toxic elements in contaminated soils : A critical review. In: Environment International. 2020 ; Vol. 134.
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